diff options
| author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
|---|---|---|
| committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
| commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
| tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/ChangeLog.tree-ssa | |
| download | cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.bz2 cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.xz | |
obtained gcc-4.6.4.tar.bz2 from upstream website;upstream
verified gcc-4.6.4.tar.bz2.sig;
imported gcc-4.6.4 source tree from verified upstream tarball.
downloading a git-generated archive based on the 'upstream' tag
should provide you with a source tree that is binary identical
to the one extracted from the above tarball.
if you have obtained the source via the command 'git clone',
however, do note that line-endings of files in your working
directory might differ from line-endings of the respective
files in the upstream repository.
Diffstat (limited to 'gcc/ChangeLog.tree-ssa')
| -rw-r--r-- | gcc/ChangeLog.tree-ssa | 19345 |
1 files changed, 19345 insertions, 0 deletions
diff --git a/gcc/ChangeLog.tree-ssa b/gcc/ChangeLog.tree-ssa new file mode 100644 index 000000000..8dc43dac2 --- /dev/null +++ b/gcc/ChangeLog.tree-ssa @@ -0,0 +1,19345 @@ +2004-05-11 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (delete_tree_cfg): Update call to + free_basic_block_vars. + +2004-05-10 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-live.h: Fix typo in #include guard. + +2004-05-08 Jeff Sturm <jsturm@one-point.com> + + * tree-eh.c (lower_catch): Lower catch body in context of + catch_region. + +2004-05-07 Richard Henderson <rth@redhat.com> + + * tree-eh.c (tree_could_trap_p): Use get_base_address on references. + +2004-05-07 Diego Novillo <dnovillo@redhat.com> + + * doc/invoke.texi: Remove documentation for -ftree-copyprop. + Update documentation for -ftree-pre. + +2004-05-06 Richard Henderson <rth@redhat.com> + + * stmt.c (parse_output_constraint): Don't warn for read-write + memory operand. + * gimplify.c (gimplify_asm_expr): Force in-out memory operands + to minimal lvalues, then expand to non-matching constraints. + +2004-05-06 Zack Weinberg <zack@codesourcery.com> + + * c-decl.c (finish_function): When !targetm.have_ctors_dtors, + record static constructors and destructors here... + (c_expand_body_1): ... not here. + * c-objc-common.c (start_cdtor, finish_cdtor): Collapse + together into + (build_cdtor): ...here. Update to construct a complete tree + for the function. No need to call push_scope, pop_scope, or + clear_last_expr, or set current_function_cannot_inline. + (c_objc_common_finish_file): Just call build_cdtor for static + ctors/dtors, then clear the variables. Do this before calling + cgraph_finalize_compilation_unit and cgraph_optimize. + +2004-05-06 Richard Henderson <rth@redhat.com> + + * fold-const.c (fold): Don't build COND_EXPR from comparisons for + boolean and integer result types. Handle X ^ X for TRUTH_XOR_EXPR. + +2004-05-05 Richard Henderson <rth@redhat.com> + + * tree-nested.c (create_tmp_var_for): Disallow variable sized types. + (convert_nonlocal_reference): Set val_only false for the base of a + component or array reference. + (convert_local_reference): Likewise. + +2004-05-05 Richard Henderson <rth@redhat.com> + + * gimplify.c (create_tmp_var): Disallow variable sized objects. + (gimplify_modify_expr): Don't memcpy for VA_ARG_EXPR. + +2004-05-05 Richard Henderson <rth@redhat.com> + + * fold-const.c (operand_equal_p): Replace only_const argument with + flags. Allow pure functions if OEP_PURE_SAME. + (fold, nondestructive_fold_binary_to_constant): Use OEP_ONLY_CONST. + * tree-cfg.c (phi_alternatives_equal): Fix operand_equal_p flag type. + * tree-ssa-dom.c (avail_expr_eq): Use OEP_PURE_SAME. + * tree.h (enum operand_equal_flag): New. + (operand_equal_p): Update argument list. + +2004-05-05 Richard Henderson <rth@redhat.com> + + * tree-ssa-operands.c (get_call_flags): Remove. + (get_expr_operands): Use call_expr_flags. + * tree-alias-common.c (call_may_clobber): Likewise. + (call_may_return): Likewise. + +2004-04-05 Andrew Pinski <pinskia@physics.uc.edu> + + PR c/15062 + * c-typeck.c (build_asm_expr): Mark the output operands + to an asm addressable, if necessary. + +2004-05-05 Steven Bosscher <stevenb@suse.de> + + * Makefile.in (GTFILES): Remove duplicate basic-block.h. + +2004-05-04 Richard Henderson <rth@redhat.com> + + * gimplify.c (build_addr_expr_with_type): Set TREE_ADDRESSABLE. + (gimplify_modify_expr): Turn variable-width assignment into memcpy. + * tree-nested.c (convert_local_reference): Set val_only after default. + +2004-05-04 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (tree_cfg2vcg): Rename from tree_cfg2dot. Update all + users. + Emit flowgraph using VCG syntax. + * tree-dump.c (dump_files): Rename -fdump-tree-dot to + -fdump-tree-vcg. + * tree.h (enum tree_dump_index): Rename TDI_dot to TDI_vcg. + * doc/invoke.texi: Update documentation to describe + -fdump-tree-vcg. + +2004-05-03 Andrew Pinski <pinskia@physics.uc.edu> + + * objc/objc-act.c (build_objc_string_object): + Add the fields to the purpose of the list for + the constructor. + +2004-05-03 Richard Henderson <rth@redhat.com> + + * c-simplify.c (gimplify_if_stmt): Loop for else-if. + +2004-05-03 Andrew Pinski <pinskia@physics.uc.edu> + + PR optimization/15245 + * tree-ssa-phiopt.c (conditional_replacement): Use fold_convert + instead of convert. + +2004-05-03 Diego Novillo <dnovillo@redhat.com> + + * gimplify.c (gimplify_compound_lval): Gimplify non-constant + array indices into a temporary variable. + +2004-04-30 Richard Henderson <rth@redhat.com> + + * builtins.c (validate_arglist): Don't reject side effects. + (simplify_builtin_strcpy): Do reject side effects in length. + +2004-04-30 Jeff Law <law@redhat.com> + + * tree-outof-ssa.c (eliminate_build): Move code which verifies + that all of a PHI's arguments do not have a partition if the + result does not have a partition from here to... + (rewrite_trees): Here. + +2004-04-24 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (factored_computed_goto_label, + factored_computed_goto): Removed. + (disband_implicit_edges): Unfactor computed gotos without + using them. + +2004-04-23 Per Bothner <per@bothner.com> + + * expr.c (expr_wfl_stack): Remove unused global. + + Pre-patches for future source_location / location_t merge. + * tree.h (EXPR_LOCATION, EXPR_HAS_LOCATION): New macros. + * expr.c (expand_expr_real, expand_expr_real_1): Use new macros. + * gimple-low.c (lower_stmt): Likewise. + * gimplify.c (annotate_all_with_locus): Likewise. + * print-tree.c (print_node): Likewise. + * tree-inline.c (expand_call_inline): Likewise. + * tree-pretty-print.c (tree-pretty-print.c): Likewise. + * tree-sra.c (scalarize_structure_assignment, emit_scalar_copies, + scalarize_call_expr): Likewise. + * tree-ssa-pre.c (code_motion): Likewise. + +2004-04-23 Andrew Pinski <pinskia@physics.uc.edu> + + * c-simplify.c (gimplify_decl_stmt) [TYPE_DECL]: + Do not check the type. + +2004-04-22 Jeff Law <law@redhat.com> + + * tree-into-ssa.c (rewrite_initialize_block_local_data): Mark all + arguments as potentially unused. Do not bother to VARRAY_CLEAR + the block_defs. Instead abort if we are presented with a block + which has a nonempty block_defs. Wrap entire thing inside + #ifdef ENABLE_CHECKING. + * tree-ssa-dom.c (dom_opt_initialize_block_local_data): Similarly + + * tree-ssa-dom.c (redirect_edges_and_update_ssa_graph): Do not mark + arguments to bypassed PHIs as needing to be rewritten. + +2004-04-21 Richard Henderson <rth@redhat.com> + + PR middle-end/14978 + * tree-nested.c (convert_nonlocal_reference): Set val_only when + processing any otherwise unhandled expression. + +2004-04-21 Jeff Law <law@redhat.com> + + * tree-ssa-copy.c (cprop_operand): Break out of cprop_into_stmt. + (cprop_into_stmt): Use cprop_operand. Rearrange slightly to avoid + switch statement inside a loop. + + * tree-flow.h (var_ann_d): Add "current_def" field. + (register_new_def): Lose last argument (currdefs table). + * tree-into-ssa.c (currdefs): Remove. + (rewrite_into_ssa): Initialize current_def field on each variable's + annotation. Remove initialization/clearing of currdefs. + (set_value_for, get_value_for): Kill. + (rewrite_initialize_block): Update call to register_new_def. + (rewrite_stmt): Similarly. + (rewrite_finalize_block): Get/set a _DECL node's current + definition from its annotation. + (get_reaching_def): Similarly. + (register_new_def): Similarly. Lose last argument. + * tree-ssa-dom.c (currdefs): Remove. + (get_value_for, set_value_for): Simplify. + (tree_ssa_dominator_optimize): Initialize current_def on each + variable's annotation. Remove initialization/clearing of currdefs. + (thread_across_edge): Lose unnecessary argument to register_new_def. + (record_equivalences_from_phis): Likewise. + (register_definitions_for_stmt): Likewise. + (restore_currdefs_to_original_value): Get/set a _DECL node's current + definition from its annotation. Lose unnecessary "table" argument. + (dom_opt_finalize_block): Corresponding changes. + + * tree-dfa.c (free_df_for_stmt): Release memory back to the GC + system immediately. + +2004-04-21 Ben Elliston <bje@au.ibm.com> + + PR middle-end/14730 + * expr.c (expand_expr_real_1) <SWITCH_EXPR>: Discard out of bounds + case label values and ranges. Saturate case range values that + exceed the minimum or maximum permitted value for the controlling + expression type to TYPE_MIN_VALUE or TYPE_MAX_VALUE. + +2004-04-20 Jeff Law <law@redhat.com> + + * tree-into-ssa.c (register_new_def): Avoid pushing useless + information onto the block local definition stack. + + * tree-into-ssa.c (register_new_def): If there is no current + reaching definition for SSA_NAME_VAR (DEF), then just push + SSA_NAME_VAR (DEF) onto the stack. + (rewrite_finalize_block): If we pop a _DECL node from the stack, + then the _DECL node has no current reaching definition. + * tree-ssa-dom.c (restore_currdefs_to_original_value): Similarly. + +2004-04-19 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c: Reinstate all changes from 2004-04-12. + (lookup_avail_expr): Do not access a hash table object after + it has been freed. + +2004-04-19 Daniel Berlin <dberlin@dberlin.org> + + * doc/passes.texi: Add blurb about PRE. + +2004-04-19 Andrew Pinski <pinskia@physics.uc.edu> + + * tree-ssa-phiopt.c (conditional_replacement): + Catch some more non-gimple. + +2004-04-19 Jan Hubicka <jh@suse.cz> + + * predict.c (combine_predictions_for_bb): Fix pasto. + +2004-04-18 Jan Hubicka <jh@suse.cz> + + * tree-inline.c (estimate_num_insn_1): Deal properly with + builtin_constant_p and builtin_expect. + +2004-04-17 Andrew MacLeod <amacleod@redhat.com> + + * doc/invoke.texi (tree-ter, tree-lrs): Document options. + +2004-04-17 Paul Brook <paul@codesourcery.com> + + * Makefile.in: Set GMPLIBS and GMPINC. + * configure.ac: Add GMPLIBS and GMPINC. + * configure: Regenerate. + +2004-04-16 Andrew MacLeod <amacleod@redhat.com> + + * common.opt (ftree-lrs): New common option. + * flags.h (flag_tree_live_range_split): New flag. + * opts.c (decode_options): Turn on LRS by default. + (common_handle_option): Set LRS flag to specified value. + * toplev.c (flag_tree_live_range_split): Initialize. + (lang_independent_options f_): Add tree-lrs. + * tree-outof-ssa.c (rewrite_out_of_ssa): Use LRS flag. + * tree-ssa-copyrename.c (copy_rename_partition_coalesce): Don't coalesce + variables if one is a hardware register. Coalesce inlined user vars. + (rename_ssa_copies): Scan blocks first, then PHI nodes. + +2004-04-15 Andrew Pinski <pinskia@physics.uc.edu> + + * builtins.c (fold_builtin_isascii): Do not return non-gimple + code when we are in gimple form. + (fold_builtin_isdigit): Do not return non-gimple + code when we are in gimple form. + + * c-simplify.c (gimplify_decl_stmt): Handle TYPE_DECL. + +2004-04-14 Paul Brook <paul@codesourcery.com> + + * Makefile.in (GMPLIBS, GMPINC): Don't set. + * configure.ac: Remove checks for GMP. + * configure: Regenerate. + +2004-04-13 Diego Novillo <dnovillo@redhat.com> + + * fold-const.c, tree-ssa-ccp.c, tree-ssa-dom.c, + tree-ssa.c, tree.c: Replace all uses of TREE_UNSIGNED with + TYPE_UNSIGNED or DECL_UNSIGNED. + + * c-semantics.c (build_stmt): Don't check type nodes for + side effects. + +2004-04-13 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c: Revert all changes from 2004-04-12. + +2004-04-12 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (struct expr_hash_elt): Add new field for hash value. + (initialize_hash_element): New LHS argument. Callers changed. + Initialize the hash value field. + (remove_local_expressions_from_table): Use htab_remove_elt_with_hash. + (update_rhs_and_lookup_avail_expr): Similary. + (lookup_avail_expr): Use htab_find_slot_with_hash. Simplify slightly + and pass LHS to initialize_hash_element. + (record_cond): Also use htab_find_slot_with_hash. Initialize the + hash table entry with initialize_hash_element. + (avail_expr_eq): Use the saved hash value rather than calling into + the hash functions again. + + * tree-ssa-dom.c (tree_ssa_dominator_optimize): Slightly rearrange + code to clear tables before each iteration to be clearer. + + * tree-ssa-dom.c (redirect_edges_and_update_ssa_graph): Use + DEF_OPS and VDEF_OPS instead of STMT_DEF_OPS and STMT_VDEF_OPS. + +2004-04-12 Diego Novillo <dnovillo@redhat.com> + + * flags.h (flag_tree_loop): Remove. Update all users. + * opts.c (common_handle_option) <OPT_ftree_loop_optimize>: Remove. + * toplev.c (f_options): Remove -ftree-loop-optimize. + * tree-optimize.c (init_tree_optimization_passes): Don't + schedule pass_loop. + * tree-ssa-loop.c (tree_ssa_loop_opt): Remove. + (gate_loop): Remove. + * doc/invoke.texi: Remove documentation for -ftree-loop-optimize. + +2004-04-12 Diego Novillo <dnovillo@redhat.com> + + * c-lang.c (LANG_HOOKS_RTL_EXPAND_STMT): Remove. + * c-semantics.c (expand_stmt_toplev): Remove. + * langhooks-def.h (LANG_HOOKS_RTL_EXPAND_INITIALIZER): Remove. + (LANG_HOOKS_RTL_EXPAND_START): Remove. + (LANG_HOOKS_RTL_EXPAND_STMT): Remove. + (LANG_HOOKS_RTL_EXPAND_END): Remove. + * langhooks.h (struct lang_hooks_for_rtl_expansion): Remove. + (struct lang_hooks): Update. + * tree-optimize.c (tree_rest_of_compilation): Don't call + lang_hooks.rtl_expand.start nor lang_hooks.rtl_expand.end. + Call expand_expr_stmt_value instead of + lang_hooks.rtl_expand.stmt. + * objc/objc-lang.c (LANG_HOOKS_RTL_EXPAND_STMT): Remove. + + +2004-04-12 Richard Henderson <rth@redhat.com> + + * c-common.c (c_do_switch_warnings): Use EXPR_LOCUS instead + of STMT_LINENO. + (c_walk_subtrees): Likewise. + (c_estimate_num_insns_1): Remove FILE_STMT. + * c-common.def (FILE_STMT): Remove. + * c-common.h (FILE_STMT_FILENAME_NODE): Remove. + (FILE_STMT_FILENAME, STMT_LINENO, STMT_LINENO_FOR_FN_P): Remove. + (c_common_stmt_codes): Remove FILE_STMT. + * c-dump.c (dump_stmt): Use EXPR_LOCUS instead of STMT_LINENO. + * c-parse.in (lineno_stmt, lineno_label): Likewise. + * c-pretty-print.c (pp_c_statement): Remove FILE_STMT. + * c-semantics.c (add_stmt): Don't emit FILE_STMT. Do set + EXPR_LOCUS if not yet set. + (finish_stmt_tree): Don't set line for end of function. + (build_stmt): Set EXPR_LOCUS instead of STMT_LINENO. + (prep_stmt): Use EXPR_LOCUS instead of STMT_LINENO. + * c-simplify.c (c_gimplify_stmt): Remove FILE_STMT. + (gimplify_block): Save and restore entire locus. + (stmt_expr_last_stmt): Use EXPR_LOCUS instead of STMT_LINENO. + * doc/c-tree.texi (FILE_STMT, FILE_STMT_FILENAME, STMT_LINENO): Remove. + +2004-04-12 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (true_exprs, false_exprs): Kill. + (struct expr_hash_elt): New structure for the expression hash table. + (struct dom_walk_block_data): Kill block local true_exprs and + false_exprs. + (get_eq_expr_value): One less local varray argument. Fix prototype. + Use record_cond rather than record_cond_is_{true,false}. + (true_false_expr_hash, true_false_expr_eq): Kill. + (record_cond_is_true, record_cond_is_false): Collapse into ... + (record_cond): New function. + (tree_ssa_dominator_optimize): Kill references to true_exprs and + false_exprs. Use "free" as the free function for the avail_exprs + hash table. + (dom_opt_initialize_block_local_data): No longer initialize + block local true/false expressions. + (initialize_hash_element): New function. + (remove_local_expressions_from_table): Use initialize_hash_element. + (update_rhs_and_lookup_avail_expr): Similarly. + (dom_opt_finalize_block): Record true/false expressions into the + main avail_expr hash table. Unwind main hash table appropriately. + Use record_cond rather than record_cond_is_{true,false}. + (record_equivalences_from_incoming_edge): Pass block local avail_exprs + varray instead of block local true/false varrays to get_eq_expr_value. + (dump_dominator_optimization_stats): Update to reflect that the + true/false expression hash tables are gone. + (lookup_avail_expr): Simplify slightly now that we only have one + expression hash table. + (avail_expr_hash, avail_expr_eq): Generalize slightly to handle new + hash table entry structure and having true/false expression information + in the available expression hash table. + +2004-04-09 Jeff Law <law@redhat.com> + + * tree-ssa_dom.c (register_definitions_for_stmt): Accept a statement + annotation rather than the statement itself. Callers changed. + Use [V]DEF_OPS rather than STMT_[V]DEF_OPS. + * tree-ssa-operands.c (get_stmt_operands): Slightly reorganize to + avoid unnecessary calls to stmt_ann. + * tree-ssa-pre.c (expr_phi_insertion): Get the statement's annotation + and use [V]USE_OPS rather than STMT_[V]USE_OPS. + (same_e_version_phi_result): Similarly + (process_left_occs_and_kills): Similarly for [V]DEF_OPS and + STMT_[V]DEF_OPS. + * tree-ssa.c (replace_immediate_uses): Similarly. + (verify_ssa): Similarly. Also verify that VDEF_OPs uses are dominated + by their sets. + + * tree-into-ssa.c (insert_phi_nodes_for): Use passed in worklist + varray instead of allocated one for every variable we rewrite into + SSA form. + (insert_phi_nodes_1): Pass worklist varray from caller to + insert_phi_nodes_for. + (insert_phi_nodes): Allocate a worklist for insert_phi_nodes_for + and pass it to insert_phi_nodes_1. + +2004-04-08 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (nonzero_vars): Turn it into a bitmap. + (tree_ssa_dominator_optimize): Update initialization, clearing and + freeing of nonzero_vars. + (restore_nonzero_vars_to_original_value): New function. + (dom_opt_finalize_block): Use it. + (record_var_is_nonzero): Only record the variable into the block + local nonzero vars array if it did not already have a nonzero property. + (lookup_avail_expr): Lookup the nonzero property of an SSA_NAME with + a bitmap test. + + * fold-const.c (fold): Remove attempt to share code which + simplifies tests against the highest/lowest value of a + range between the main folder and the nondestructive folder. + +2004-04-08 Brian Booth <bbooth@redhat.com> + Diego Novillo <dnovillo@redhat.com> + + * tree-into-ssa.c (invalidate_name_tags): New function. + Mark aliases of invalidated name tags for renaming. + (rewrite_into_ssa): Call invalidate_name_tags. + +2004-04-07 Diego Novillo <dnovillo@redhat.com> + + * gimplify.c (gimplify_call_expr): Remove argument POST_P. + Update all callers. + Don't use POST_P when gimplifying the call expression. + +2004-04-07 Diego Novillo <dnovillo@redhat.com> + + * doc/tree-ssa.texi: Add documentation for the dominator + walker. + +2004-04-07 Andrew MacLeod <amacleod@redhat.com> + + * tree-outof-ssa.c: Update comments and reformat for legibility. + * tree-ssa-copyrename.c: Update comments and reformat for legibility. + * tree-ssa-live.c: Update comments and reformat for legibility. + * tree-ssa-live.h: Update comments and reformat for legibility. + +2004-04-07 Diego Novillo <dnovillo@redhat.com> + + * gimplify.c (gimplify_call_expr): Don't use POST_P when + gimplifying CALL_EXPR arguments. + +2004-04-06 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c: Update comments and reformat for legibility. + (find_vars_r): Remove special casing of MODIFY_EXPR and + simplify logic. + (compute_reached_uses, compute_reaching_defs, remove_decl, + find_decl_location): Remove. + (discover_nonconstat_array_refs_r, + discover_nonconstant_array_refs): Move ... + * tree-outof-ssa.c: ... here. + +2004-04-05 Richard Henderson <rth@redhat.com> + + * tree-simple.c (is_gimple_min_invariant): Disallow &a+i. + * tree-ssa-ccp.c (maybe_fold_stmt_addition): Rename from + maybe_fold_stmt_plus. Handle MINUS_EXPR. + (fold_stmt_r): Pass MINUS_EXPR to it. + +2004-04-05 Ben Elliston <bje@au.ibm.com> + + * Makefile.in (OBJS-common): Remove tree-browser.o. + (cc1): Depend on @TREEBROWSER@ and include in list of objects. + * configure.ac: Add --enable-tree-browser option. + * configure: Rebuild. + +2004-04-05 Andrew Pinski <pinskia@physics.uc.edu> + + * tree-ssa-ccp.c (fold_stmt_r): Fix whitespace formatting. + (set_rhs): Likewise. + +2004-04-03 Paolo Bonzini <bonzini@gnu.org> + Diego Novillo <dnovillo@redhat.com> + + * tree-alias-common.c (find_func_aliases): Support + assigning to BIT_FIELD_REFs. + * tree-cfg.c (verify_expr): Don't allow assign to + a register with BIT_FIELD_REF. + * tree-dfa.c (get_virtual_var): Add consistency check on + the shape of expected VARs. + (discover_nonconstant_array_refs_r): Go through BIT_FIELD_REFs. + * tree-simple.c: Document that BIT_FIELD_REFs are valid lvalues. + * tree-ssa.c (set_is_used): Go through BIT_FIELD_REFs. + * tree-ssa-operands.c (get_expr_operands): Mark VA_ARG_EXPR + nodes as making volatile references. + +2004-04-02 Fariborz Jahanian <fjahanian@apple.com> + + * c-convert.c (convert): Make convert work when converting + to compatible types across translation unit. + +2004-04-02 Andrew Pinski <pinskia@physics.uc.edu> + + * Makefile.in (stage2_build): Remove support for + rebuilding libbanshee. + * configure.ac: Remove support for rebuilding + libbanshee. + * config.gcc (powerpc-*-darwin*): Do not rebuild + libbanshee. + +2004-04-01 Kazu Hirata <kazu@cs.umass.edu> + + * tree-ssa-forwprop.c: Add a comment about forward propagation + of TRUTH_NOT_EXPR. + +2004-04-01 Diego Novillo <dnovillo@redhat.com> + + * tree-optimize.c (tree_rest_of_compilation): Fix typo in + setting of in_gimple_form. + +2004-04-01 Jeff Law <law@redhat.com> + + * fold-const.c (fold_relational_hi_lo): Do not return non-gimple + code when we are in gimple form. + * tree-optimize.c (tree_rest_of_compilation): Note when we are in + gimple form. + * tree-ssa-ccp.c (ccp_fold): Tighten tests on return value from + nondestructive_fold_{unary,binary}_to_constant. + * tree.h (in_gimple_form): Declare. + + * tree-ssa.c (ssa_remove_edge): Correct looping structure. + (ssa_redirect_edge): Similarly + +2004-03-30 Brian Booth <bbooth@redhat.com> + + * tree-pretty-print.c (dump_vops): Add flags argument and + propagate it to dump_generic_node calls. + (dump_generic_node): Update dump_vops call. + +2004-03-29 Diego Novillo <dnovillo@redhat.com> + + * configure.ac: Emit confirmation messages for libbanshee. + * configure: Regenerate. + +2004-03-29 Jan Hubicka <jh@suse.cz> + + PR 14756 + * cgraphunit.c (cgraph_decide_inlining): Rewrite handling of + always_inline functions. + +2004-03-28 Jan Hubicka <jh@suse.cz> + + * tree-inline.c (expand_call_inline): Remove fixme introduced by + nested function patch. + +2004-03-26 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-operands.c (get_stmt_operands): Remove always-true + predicate. + + * tree-ssa-alias.c (maybe_create_global_var): Create + .GLOBAL_VAR if there are no call-clobbered variables. + * tree-ssa-operands.c (get_stmt_operands): Add call-clobbering + VDEFs for asm ("":::"memory") if there are call-clobbered + variables or if .GLOBAL_VAR has been created. + + +2004-03-26 Diego Novillo <dnovillo@redhat.com> + + * passes.c (rest_of_compilation): Re-enable .01.rtl + dumps. + +2004-03-25 Diego Novillo <dnovillo@redhat.com> + + * tree-pretty-print.c (dump_generic_node) <WITH_RECORD_EXPR>: Remove. + * tree-inline.c (estimate_num_insns_1) <WITH_RECORD_EXPR>: Remove. + * fold-const.c (fold_relational_hi_lo): Change type of argument + 'type_p' to const tree and rename it to 'type'. Update + all callers. + +2004-03-25 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (C_AND_OBJC_OBJS): Remove c-call-graph.o + (c-call-graph.o): Remove. + * c-call-graph.c: Remove. + * c-tree.h (print_call_graph): Remove. + (debug_call_graph): Remove. + * tree-cfg.c: Update/add comments everywhere. + (pre_insert_on_edge): Rename from bsi_insert_on_edge_immediate. + * tree-flow.h (build_tree_cfg): Make static. + (tree_cfg2dot): Likewise. + (verify_stmt): Likewise. + * tree-ssa-pre.c (insert_one_operand): Call pre_insert_on_edge. + +2004-03-25 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-alias.c (struct alias_info): Change type of field + 'num_references' to varray_type. Update all users. + +2004-03-24 Jeff Law <law@redhat.com> + + * c-mudflap (mflang_flush_calls): Use push_scope/pop_scope instead + of pushlevel and poplevel. + +2004-03-23 Richard Henderson <rth@redhat.com> + + PR middle-end/14694 + * c-common.c (handle_alias_attribute): Mark aliased variables + to be TREE_STATIC. + +2004-03-23 Jeff Law <law@redhat.com> + + * tree-into-ssa.c (register_new_def): Lose unnecessary VAR argument, + instead derive VAR from DEF argument. + (rewrite_initialize_block, rewrite_stmt, rewrite_operand): Corresponding + changes. + * tree-ssa-dom.c (register_definitions_for_stmt): Corresponding changes. + (record_equivalences_from_phis): Likewise. + (restore_currdefs_to_original_value): New, extracted from ... + (dom_opt_finalize_block): Use restore_currdefs_to_original_value. + Restore currdefs after threading across a true edge. + (thread_across_edge): Register new defintions when we walk through + a PHI node or real statement. + * tree-flow.h (register_new_def): Updated. + +2004-03-23 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa-dce.c (find_obviously_necessary_stmts, + perform_tree_ssa_dce): Do not remove loops. + +2004-03-19 Diego Novillo <dnovillo@redhat.com> + + PR optimization/14643 + * tree-ssa-alias.c (group_aliases_into): Don't add a variable + to its own may-alias set. + (create_alias_map_for): New. + (setup_pointers_and_addressables): Call it. + Fix allocation of AI->ADDRESSABLE_VARS and AI->POINTERS. + If there are no addressable variables and more than one + dereferenced pointers, add type tags to the ADDRESSABLE_VARS + array. + (get_tmt_for): Add comment about using alias set equality when + checking for existing tags. + +2004-03-19 Kazu Hirata <kazu@cs.umass.edu> + + * fold-const.c (fold_relational_const): Remove dead code. + +2004-03-19 Dale Johannesen <dalej@apple.com> + + * tree-ssa-dse.c (dse_optimize_stmt): Redirect uses feeding into + a deleted store correctly. + +2004-03-19 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Fix typo. + Eliminate unnecessary test of VAL. + + * tree-dfa.c (find_hidden_use_vars): Also look inside the + PENDING_SIZES list for hidden uses. + * tree-optimize.c (tree_rest_of_compilation): Expand used variables + before setting up parameters. + * tree-ssa-copyrename.c (rename_ssa_copies): Do nothing for copies + where the LHS has a hidden use. + +2004-03-18 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (TREE_FLOW_H): Reformat. + (OBJS-common): Add tree-into-ssa.o and tree-outof-ssa.o. + (tree-ssa.o): Remove dependency on domwalk.h and tree-ssa-live.h + (tree-into-ssa.o): New. + (tree-outof-ssa.o): New. + (GTFILES): Remove tree-ssa.c. + (gt-tree-ssa.h): Remove. + * tree-into-ssa.c: New file. + Move all the functions used to rename into SSA from tree-ssa.c. + Update/add comments. + Remove unused variables and structures. + Don't use GGC for memory allocation. + * tree-outof-ssa.c: New file. + Move all the functions used to rename out of SSA from + tree-ssa.c. + Update/add comments. + * tree-ssa-alias.c (compute_points_to_and_addr_escape): Add + bibliographic reference. + +2004-03-18 Jeff Law <law@redhat.com> + + * Makefile.in (tree-tailcall.o): Depend on langhooks.h. + * tree-tailcall.c: Include langhooks.h. + (find_tail_calls): Use types_compatible_p langhook instead of + equality test of TYPE_MAIN_VARIANT. + + * tree-nested.c (get_chain_decl): Mark the chain decl with + TREE_NO_WARNING. + +2004-03-18 Devang Patel <dpatel@apple.com> + + * tree-ssa-live.c (new_tree_live_info): Set num_blocks to + last_basic_block instead of n_basic_blocks. + (calculate_live_on_entry): Use last_basic_block instead of + n_basic_blocks. + (calculate_live_on_exit): Same. + +2004-03-17 Jeff Law <law@redhat.com> + + * tree-tailcall.c (find_tail_calls): Tighten test for tail recursion. + +2004-03-17 Diego Novillo <dnovillo@redhat.com> + + PR optimization/14511 + * tree-ssa-alias.c (compute_flow_insensitive_aliasing): Do not + ignore read-only variables. + (may_alias_p): Fix pointer-to-var calculation when 'var' is an + array. + +2004-03-17 Jan Hubicka <jh@suse.cz> + + * tree-ssa.c (rewrite_into_ssa, compute_global_livein): Fix. + +2004-03-17 Paolo Bonzini <bonzini@gnu.org> + + * builtins.c (expand_builtin_constant_p, + purge_builtin_constant_p): Remove. + (expand_builtin): Expand __builtin_constant_p to zero. + * function.c (struct function): Remove calls_constant_p. + (current_function_calls_constant_p): Remove. + * passes.c (rest_of_handle_gcse): Do not run + purge_builtin_constant_p. + * rtl.def (CONSTANT_P_RTX): Die die die. + + * cse.c (fold_rtx): Do not handle CONSTANT_P_RTX. + * expr.c (emit_move_insn): Likewise. + * gcse.c (want_to_gcse_p, gcse_constant_p): Likewise. + * genrecog.c (validate_pattern): Likewise. + * recog.c (immediate_operand): Likewise. + * rtl.h (CONSTANT_P): Likewise. + * simplify-rtx.c (simplify_rtx): Likewise. + * config/alpha/alpha.c (input_operand): Likewise. + * config/arm/arm.c (THUMB_LEGITIMATE_CONSTANT_P): Likewise. + * config/c4x/c4x.c (const_operand): Likewise. + * config/cris/cris.c (cris_gotless_symbol, + cris_got_symbol): Likewise. + * config/frv/frv.h (LEGITIMATE_PIC_OPERAND_P): Likewise. + * config/ia64/ia64.c (gr_reg_or_5bit_operand, + gr_reg_or_6bit_operand, gr_reg_or_8bit_operand, + gr_reg_or_8bit_adjusted_operand, + gr_reg_or_8bit_and_adjusted_operand, + gr_reg_or_14bit_operand, gr_reg_or_22bit_operand, + shift_count_operand, shift_32bit_count_operand): Likewise. + * config/m32r/m32r.c (move_src_operand): Likewise. + * config/mips/mips.c (mips_const_insns): Likewise. + * config/mmix/mmix.c (mmix_constant_address_p): Likewise. + * config/pa/pa.c (move_src_operand): Likewise. + * config/rs6000/rs6000.c (input_operand): Likewise. + * config/sparc/sparc.c (input_operand): Likewise. + * config/v850/v850.c (movsi_source_operand): Likewise. + * config/xtensa/xtensa.c (move_operand, + xtensa_emit_move_sequence): Likewise. + * config/ia64/ia64.h (PREDICATE_CODES): Do not mention CONSTANT_P_RTX. + * config/pa/pa.h (PREDICATE_CODES): Likewise. + +2004-03-16 Diego Novillo <dnovillo@redhat.com> + + * tree-dump.c (struct dump_option_value_info): Add TDF_UID. + * tree.h (TDF_UID): Define. + * doc/invoke.texi: Document -ftree-dump-...-uid. + * tree-pretty-print.c (debug_generic_expr): Add TDF_UID. + (debug_generic_stmt): Likewise. + (dump_decl_name): New function. + (dump_generic_node): Call it. + (print_declaration): Add new argument 'flags'. Update all users. + (print_struct_decl): Likewise. + * tree-alias-ander.c, tree-cfg.c, tree-dfa.c, tree-mudflap.c, + tree-nrv.c, tree-sra.c, tree-ssa-alias.c, tree-ssa-ccp.c, + tree-ssa-copy.c, tree-ssa-dom.c, tree-ssa-dse.c, + tree-ssa-forwprop.c, tree-ssa-operands.c, tree-ssa-pre.c, + tree-ssa.c, tree-tail-call.c: Call print_generic_* with + 'dump_flags'. + +2004-03-16 Dale Johannesen <dalej@apple.com> + + * Makefile.in (tree-ssa-phiopt.o): add langhooks.h dependency. + (tree-nrv.o): Ditto. + (tree-ssa-copy.o): Ditto. + (tree-ssa-dom.o): Ditto. + (tree-ssa-ccp.o): Ditto. + * c-common.c: Add #include hashtab.h. + (c_type_hash): New. + (c_common_get_alias_set): Handle multiple type nodes referring + to "the same" type, currently for C90 only. + * c-decl.c (current_file_decl): Move to toplev.c. + * c-lang.c (LANG_HOOKS_TYPES_COMPATIBLE_P): Define to + c_types_compatible_p. + (c_types_compatible_p): New. + * c-tree.h (c_types_compatible_p): New declaration. + * c-typeck.c (tagged_types_tu_compatible_p): Allow for + compiler-generated TYPE_DECLs without a DECL_ORIGINAL_TYPE. + * gimplify.c (canonicalize_addr_expr): Use types_compatible_p langhook. + (cpt_same_type): Ditto. + * langhooks-def.h (lhd_types_compatible_p): New declaration. + LANG_HOOKS_TYPES_COMPATIBLE_P: New. + * langhooks.c (lhd_types_compatible_p): New. + * langhooks.h (struct lang_hooks): Add types_compatible_p. + * stmt.c (tail_recursion_args): Use types_compatible_p langhook. + * toplev.c (current_file_decl): New, moved from c-decl.c. + * tree-nrv.c: Include langhooks.h. + (tree_nrv): Use types_compatible_p langhook. + * tree-ssa-ccp.c: Include langhooks.h. + (maybe_fold_offset_to_array_ref): Use types_compatible_p langhook. + (maybe_fold_offset_to_component_ref): Ditto (2 places). + (fold_stmt_r): Make sure rhs of COMPONENT_REF is in lhs type. + * tree-ssa-copy.c: Include langhooks.h. + (cprop_into_stmt): Use types_compatible_p langhook. + * tree-ssa-dom.c: Include langhooks.h. + (avail_expr_p): Use types_compatible_p langhook. + * tree-ssa-phiopt.c: Include langhooks.h. + (conditional_replacement): Use types_compatible_p langhook. + * tree-ssa.c (tree_ssa_useless_type_conversion_1): Use + types_compatible_p langhook. + * tree.h (current_file_decl): New declaration. + +2004-03-16 Dale Johannesen <dalej@apple.com> + + PR optimization/14498 + * gimplify.c (copy_if_shared_r): Mark VA_ARGS_EXPRs as volatile. + (mark_decls_volatile_r): Moved higher in file (unchanged). + +2004-03-16 Daniel Berlin <dberlin@dberlin.org> + + PR optimization/14562 + * tree-ssa-pre.c (generate_expr_as_of_bb): Don't use names_match_p. + (generate_vops_as_of_bb): Ditto. + +2004-03-12 Diego Novillo <dnovillo@redhat.com> + + PR optimization/14553 + * tree-ssa.c (replace_immediate_uses): Call propagate_value to + update operands. + +2004-03-12 Diego Novillo <dnovillo@redhat.com> + + * tree-alias-common.c (create_alias_vars): Add #if + HAVE_BANSHEE around test for PTA_ANDERSEN. + +2004-03-11 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (struct walk_state): Remove fields 'is_store' and + 'is_indirect_ref'. Update all users. + * tree-flow.h (struct var_ann_d): Remove fields 'is_stored', + 'is_dereferenced_store' and 'is_dereferenced_load'. Update + all users. + * tree-simple.c (get_base_address): Handle BIT_FIELD_REF. + * tree-ssa-alias.c (struct alias_info): Add fields + 'written_vars', 'dereferenced_ptrs_store' and + 'dereferenced_ptrs_load'. + (init_alias_info): Initialize them. + (delete_alias_info): Free them. + (find_ptr_dereference): New. + (ptr_is_dereferenced_by): Call it. + Add new argument 'is_store'. Set to true if the + expression is an indirect store operation. + (compute_points_to_and_addr_escape): If the statement + makes a store, load or write operation, update the + corresponding bitmap. + (compute_flow_insensitive_aliasing): Test the + 'written_vars' bitmap to determine if alias sets should + be computed. + (setup_pointers_and_addressables): Always assume that + volatile pointers and hidden pointers have been used in a + memory store operation. + * tree-ssa-operands.c (add_stmt_operand): Do add an + operand for may-aliased variables before computing + aliases. + +2004-03-11 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-optimize.c (init_tree_optimization_passes): Move + pass_tail_recursion and pass_ch after pass_may_alias. + * tree-ssa-loop.c (mark_defs_for_rewrite): Mark type tags + for rewriting. + * tree-ssa.c (mark_def_sites): Process the operand of a + VDEF before the result. + +2004-03-11 Richard Henderson <rth@redhat.com> + + PR 14204 + * tree-ssa.c (warn_uninit): Don't warn for hard register variables. + +2004-03-10 Richard Henderson <rth@redhat.com> + + * tree-simple.c (get_base_var, get_base_decl): Remove. + * tree-simple.h: Likewise. + * tree-dfa.c (discover_nonconstant_array_refs_r): Use get_base_address. + * tree-ssa-alias.c (ptr_is_dereferenced_by): Likewise. + (add_pointed_to_var, is_escape_site): Likewise. + * tree-ssa-ccp.c (get_default_value): Expect only SSA_NAME and DECLs. + * tree-ssa-operands.c (add_stmt_operand): Likewise. + (note_addressable): Use get_base_address. + * tree-ssa-dce.c (need_to_preserve_store): Expect only SSA_NAME. + * tree-ssa.c (set_is_used): Inline get_base_decl. + +2004-03-10 Richard Henderson <rth@redhat.com> + + * tree-nested.c (convert_nonlocal_reference): Clear TREE_INVARIANT + on modified ADDR_EXPRs. + +2004-03-10 Andrew Pinski <apinski@apple.com + + PR c/14475 + * c-decl.c (check_bitfield_type_and_width): Check for null + lang_type_specific when check the precision of an enum. + +2004-03-09 Andrew Pinski <apinski@apple.com> + + * Makefile.in (tree-ssa-forwprop.o): Fix the dependences. + +2004-03-09 Jeff Law <law@redhat.com> + + * tree-flow-inline.h (may_propagate_copy): Do not allow propagation of + a constant for a virtual operand. + +2004-03-08 Richard Henderson <rth@redhat.com> + + * calls.c (initialize_argument_information): Add + parameter may_tail_call. Set to false for invisible + pass-by-reference arguments that require stack + allocation. + Update all users. + +2004-03-07 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c: (get_eq_expr_value): Fix typo when comparing a + boolean against a constant. + * tree-ssa-forwprop.c (record_single_argument_cond_exprs): Do not + record the same SSA_NAME more than once. Only record the SSA_NAME + tested, not the COND_EXPR. + (substitute_single_use_vars): Substitute booleans which are + set from a TRUTH_NOT_EXPR even if they have more than one use site. + +2004-03-05 Jeff Law <law@redhat.com> + + * tree-ssa-dce.c (remove_dead_stmt): Clear PENDING_STMT after + redirect_edge_and_branch call. + + * tree-ssa-forwprop.c (record_single_argument_cond_exprs): Also + record COND_EXPRs with single use vars defined by SSA_NAME + CONST + expressions. + (substitute_single_use_vars): Corresponding changes to rewrite + COND_EXPRs using single use vars defined by SSA_NAME + CONST + expressions. + +2004-03-05 Ulrich Weigand <uweigand@de.ibm.com> + + * config/s390/s390.c (s390_expand_movstr): Do not use + expand_exit_loop_top_cond, manually copy loop header. + (s390_expand_clrstr): Likewise. + (s390_expand_cmpmem): Likewise. + +2004-03-04 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-alias.c (compute_flow_sensitive_aliasing): If + a name tag has been marked call-clobbered, also mark the + corresponding type tag. + +2004-03-04 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa-loop-live.c (coalesce_tpa_members): Update the root + variable of the partition. + +2004-03-04 Jeff Law <law@redhat.com> + + * tree-ssa-dce.c (remove_dead_stmt): Redirect an existing edge + rather than deleting the old ones and creating a new one when + removing a dead conditional. + + * fold-const.c (fold): When rebuilding the expression after a + call to fold_relational_hi_lo, make sure to convert the type of + the second argument to the type of the first. + +2004-03-04 Diego Novillo <dnovillo@redhat.com> + + * cgraphunit.c (cgraph_optimize): Do not do memory release + check if there have been errors. + +2004-03-03 Jeff Law <law@redhat.com> + + * tree-ssa-phiopt.c (conditional_replacement): Clear EDGE_TRUE_VALUE + and EDGE_FALSE_VALUE on the remaining edge after eliminating a PHI. + +2004-03-03 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-copyrename.c (gate_copyrename): Really check it in. + * tree-ssa.c (create_temp): Use DECL_ARTIFICIAL from original decl. + +2004-03-02 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-tailcall.c (struct tailcall): Remove return_block and return_bsi + fields, add m and a fields. + (m_acc, a_acc): New. + (find_tail_calls): Find tail calls on whose results simple operations + are performed. + (independent_on_stmt_p, process_assignment, + propagate_through_phis, adjust_accumulator_values, + adjust_return_value): New. + (eliminate_tail_call): Update the accumulators if needed. + (optimize_tail_call): Do not create phis. + (tree_optimize_tail_calls): Create phis and accumulators as needed. + Adjust return values. + +2004-03-02 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-operands.c (get_expr_operands): Mark CALL_EXPRs + with has_volatile_ops if aliases haven't been computed yet. + (add_stmt_operand): Use 'true' instead of '1'. + +2004-03-02 Diego Novillo <dnovillo@redhat.com> + + PR optimization/14266 + * tree-ssa-alias.c (create_global_var): Mark GLOBAL_VAR for + renaming. + +2004-03-01 Richard Henderson <rth@redhat.com> + + * tree.c (associative_tree_code): Remove MINUS_EXPR, LSHIFT_EXPR, + RSHIFT_EXPR. + * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Use + is_gimple_min_invariant and is_gimple_var. Handle minus_expr + specially. + +2004-03-01 Richard Henderson <rth@redhat.com> + + * cfgbuild.c (rtl_make_eh_edge): Rename from make_eh_edge. + * basic-block.h, except.c: Update decl and uses. + +2004-03-01 Frank Ch. Eigler <fche@redhat.com> + + * doc/passes.texi: Add information about mudflap. + +2004-03-01 Andrew Pinski <pinskia@physics.uc.edu> + + PR middle-end/13066 + * fold-const (fold): Call fold_convert when building + a TRUTH_*_EXPR tree. + +2004-03-01 Andrew MacLeod <amacleod@redhat.com> + + * common.opt : Add tree-copyrename option. Remove duplicate tree-sra. + * flags.h (flag_tree_copyrename): Declare. + * opts.c (decode_options): Turn copyrename on by default at -O. + (common_handle_option): Handle -ftree-copyrename. + * toplev.c (flag_tree_copyrename): Declare. + * tree-ssa-copyrename.c (gate_copyrename): New. Check flag. + (pass_rename_ssa_copies): Initialize with gated routine. + (lang_independent_options f_): Add tree-copyrename. + * doc/invoke.texi: Add -fdump-tree-copyrename and -ftree-copyrename. + * doc/passes.texi: Add blurb for copy renaming. + +2004-03-01 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (true_false_expr_hash): Update comments slightly. + (true_false_expr_eq): Update comments slightly. Avoid using + operand_equal_p, instead check the code and operands directly. + +2004-03-01 Andrew MacLeod <amacleod@redhat.com> + + * Makefile.in (tree-ssa-copyrename.o): New object. + * timevar.def (TV_TREE_COPY_RENAME): New time variable. + * tree-optimize.c (init_tree_optimization_passes): Add copy rename + pass. + * tree-pass.h (pass_rename_ssa_copies): New pass structure. + * tree-sra.c (lookup_scalar): Copy DECL_ARITIFICIAL flag from base. + * tree-ssa-copyrename.c : New file. + (copy_rename_partition_coalesce): Coalesce partitions for renaming. + (rename_ssa_copies): Find renamable copies. + (pass_rename_ssa_copies): Initialize. + * tree-ssa-live.c (register_ssa_partition): Move to tree-ssa-live.h. + * tree-ssa-live.h (register_ssa_partition): Moved from tree-ssa-live.c. + +2004-02-29 David Edelsohn <edelsohn@gnu.org> + + * doloop.c (doloop_optimize): Increment n_iterations if loop->top + present. + +2004-02-29 Diego Novillo <dnovillo@redhat.com> + + * gimple-low.c (pass_remove_useless_vars): Add TODO_dump_func. + +2004-02-27 Richard Henderson <rth@redhat.com> + + PR middle-end/14310 + * explow.c (emit_stack_save): Remove savearea mode check. + +2004-02-27 Richard Henderson <rth@redhat.com> + + * builtins.c (simplify_builtin_strcmp): Don't export. Remove + length parameters. Remove conversion to memcmp. + (simplify_builtin_strncmp): Likewise. + * expr.h: Don't declare them. + * tree-ssa-ccp.c (ccp_fold_builtin): Don't call them. + +2004-02-27 Dale Johannesen <dalej@apple.com> + + * tree-cfg.c (cleanup_control_expr_graph): Prevent edge + probability from overflowing due to roundoff errors. + +2004-02-27 Jeff Law <law@redhat.com> + + * tree-cfg.c (verify_expr): Do not walk down into types. + Expand checking to verify that unary/binary operators have + gimple operands. + * tree-ssa-ccp.c (ccp_fold_builtin, case BUILT_IN_STRLEN): Do not + create non-gimple code. Similarly for BUILTIN_IN_STRCPY and + BUILT_IN_STRNCPY. + * tree-ssa-phiopt.c (conditional_replacement): Do not create + non-gimple code. + * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Likewise. + + * tree-simple.c (is_gimple_min_invariant): Subtraction of a + constant from a constant pointer is a gimple invariant as well. + * tree-ssa-operands.c (get_expr_operands): Handle subtraction + of a constant from a constant pointer too. + + * fold-const.c (fold): Tighten test for optimizing an equality + comparison of the address of two variables. + + * tree-inline.c (setup_one_parameter): Improve test for when we + need to gimplify the initialization statements. + +2004-02-27 Diego Novillo <dnovillo@redhat.com> + + PR optimization/14312 + * tree-pretty-print.c (dump_generic_node): Mark tail calls. + * tree-ssa-alias.c (compute_may_aliases): Restore call to + dump_referenced_vars. + (compute_points_to_and_addr_escape): If the address of a + variable V is stored into a non-pointer variable, mark V as + call-clobbered. + * tree-tailcall.c (suitable_for_tail_opt_p): Check for + call-clobbered instead of TREE_ADDRESSABLE. + Ignore memory tags. + (optimize_tail_call): Add newline to dump output. + +2004-02-27 Diego Novillo <dnovillo@redhat.com> + + PR optimization/13347 + * tree-sra.c (scalarize_structure_assignment): Use STRIP_NOPS + instead of STRIP_USELESS_TYPE_CONVERSION to remove type casts + from RHS of the assignment. + + * tree-ssa.c (tree_ssa_useless_type_conversion_1): Reformat + and rephrase comments. + * tree.h (STRIP_USELESS_TYPE_CONVERSION): Reformat comment. + +2004-02-26 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (tree_redirect_edge_and_branch_1): Allow to redirect + RETURN_EXPR branches. + +2004-02-26 Jeff Law <law@redhat.com> + + * tree-nrv.c (tree_nrv): Only perform NRV optimization when the + return value lives in memory. + + * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): If an + operand is unsigned, then we can eliminate more ABS expressions + and turned div/mod expression into shift/and expressions. + + * fold-const.c (fold): An equality comparison of the address of + two non-weak variables has known compile-time result. + +2004-02-26 Andrew Pinski <pinskia@physics.uc.edu> + + * tree-ssa-phiopt.c (conditional_replacement): + s/tree_dump_flags/dump_flags/. + + * tree-ssa-phiopt.c (tree_ssa_phiopt): Split into ... + (conditional_replacement): Here. + +2004-02-26 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa.c (find_replaceable_in_bb): Don't repalce expressions in + volatile statements. + +2004-02-25 Richard Henderson <rth@redhat.com> + + PR opt/14288 + * gimplify.c (gimple_push_cleanup): Add VAR argument. Set + TREE_NO_WARNING if in a conditional context. + (gimplify_target_expr): Pass new argument. + * tree-sra.c (lookup_scalar): Copy TREE_NO_WARNING to replacement. + +2004-02-24 Kazu Hirata <kazu@cs.umass.edu> + + * doc/invoke.texi: Replace -fdump-tree-all-ssa with + -fdump-tree-all. + +2004-02-24 Kazu Hirata <kazu@cs.umass.edu> + + PR target/14285 + * config/arm/arm.c (arm_compute_func_type): Replace + "current_function_needs_context" with "cfun->static_chain_decl + != NULL". + (arm_compute_initial_elimination_offset): Likewise. + * config/h8300/h8300.c (h8300_emit_stack_adjustment): + Likewise. + * config/sh/sh.c (output_stack_adjust): Likewise. + (sh5_schedule_saves): Likewise. + * config/xtensa/xtensa.c (compute_frame_size): Likewise. + +2004-02-24 Richard Henderson <rth@redhat.com> + + * c-simplify.c (c_genericize): s/dump_flags/local_dump_flags/. + * predict.c, tree-alias-ander.c, tree-cfg.c, tree-nrv.c, + tree-optimize.c, tree-pass.h, tree-sra.c, tree-ssa-alias.c, + tree-ssa-ccp.c, tree-ssa-copy.c, tree-ssa-dce.c, tree-ssa-dom.c, + tree-ssa-dse.c, tree-ssa-forwprop.c, tree-ssa-loop.c, + tree-ssa-phiopt.c, tree-ssa-pre.c, tree-ssa.c, tree-tailcall.c: + s/tree_dump_flags/dump_flags/. + +2004-02-24 Richard Henderson <rth@redhat.com> + + * predict.c, tree-alias-ander.c, tree-cfg.c, tree-mudflap.c, + tree-nrv.c, tree-optimize.c, tree-pass.h, tree-profile.c, tree-sra.c, + tree-ssa-alias.c, tree-ssa-ccp.c, tree-ssa-copy.c, tree-ssa-dce.c, + tree-ssa-dom.c, tree-ssa-dse.c, tree-ssa-forwprop.c, tree-ssa-loop.c, + tree-ssa-operands.c, tree-ssa-phiopt.c, tree-ssa-pre.c, tree-ssa.c, + tree-tailcall.c: s/tree_dump_file/dump_file/g. + +2004-02-24 Diego Novillo <dnovillo@redhat.com> + + * doc/tree-ssa.texi: Fix formatting mark ups. + +2004-02-24 Jeff Law <law@redhat.com> + + * gimple-low.c (remove_useless_vars): Now static. + (pass_remove_useless_vars): New. + * tree-flow.h (remove_useless_vars): Remove prototype. + * tree-nrv.c (struct nrv_data): Remove visited hashtable. + (finalize_nrv_r): Do not descend into types. No need to update + the visited hashtable. + (tree_nrv): No need to allocate/free the visited hashtable. + Clear the used flag on the variable's annotation. + * tree-optimize.c (init_tree_optimizatio_passes): Link in + pass_remove_useless_vars. + * tree-pass.h (pass_remove_useless_vars): Declare. + * tree-ssa.c (rewrite_out_of_ssa): Do not remove useless vars here. + + * Makefile.in (OBJS-common): Add tree-nrv.o. + (tree-nrv.o): Add dependencies. + * timevar.def (TV_TREE_NRV): New timevar. + * tree-nrv.c: New file implementing NRV on generic trees. + * tree-optimize.c (init_tree_optimization_passes): Link in + tree_nrv optimization pass. + * tree-pass.h (tree_nrv): Declare. + * doc/invoke.texi: Add -fdump-tree-nrv documentation. + +2004-02-24 Sebastian Pop <sebastian.pop@cri.ensmp.fr> + + * tree-flow.h (walk_use_def_chains_fn): Return a boolean. + True for stopping the use-def walk, false otherwise. + * tree-ssa-alias.c (collect_points_to_info_r): Same. + Always return false, and never stopping the def-use walk as before. + * tree-ssa.c (walk_use_def_chains_1): Stop when the result of the + callback function is true. + * doc/tree-ssa.texi: Document the behavior of the callback + function for walk_use_def_chains. + +2004-02-24 Richard Henderson <rth@redhat.com> + + * doc/passes.texi: Rewrite. + +2004-02-23 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (TEXI_GCCINT_FILES): Add cfg.texi and tree-ssa.texi + * tree-ssa-alias.c (compute_may_aliases): Update documentation. + * doc/gccint.texi: Add node for Tree SSA documentation. + Include tree-ssa.texi. + * doc/tree-ssa.texi: New file. + +2004-02-23 Dale Johannesen <dalej@apple.com> + + * config/rs6000/rs6000.md: Roll in changes from mainline: + (movdf_softfloat64): Add POWER form of nop. + (movsf_hardfloat): Ditto, and accept CTR-to-CTR copy. + (movdf_hardfloat64): Ditto. + +2004-02-23 Jeff Law <law@redhat.com> + + * ggc-page.c (struct page_entry): New field PREV. + (ggc_alloc): Update PREV field appropriately. + (sweep_pages): Likewise. + (ggc_free): Likewise. Use PREV field rather than loop to + improve ggc_free performance. + + * Makefile.in (OBJC-common): Add tree-ssa-copy.o. + (tree-ssa-copy.o): Add dependencies. + * tree-flow.h (propagate_value, replace_exp): Prototype. + (cprop_into_stmt, cprop_into_successor_phis): Likewise. + * tree-ssa-copy.c: New file, most functions copied from tree-ssa-dom.c + (cprop_into_stmt): Handle pointer & reference types better. + * tree-ssa-dom.c (opt_stats_d): Kill uninteresting stats. + (dump_dominator_optimization_stats): Corresponding changes. + (cprop_into_stmt): Moved into tree-ssa-copy.c. + (propagate_value): Likewise. + (cprop_into_phis): Simplify using code fromi tree-ssa-copy.c. + (optimize_stmt): Pass additional argument to cprop_into_stmt. + * tree-ssa-pre.c (generate_expr_as_of_bb): Use replace_exp. + (generate_vops_as_of_bb): Similarly. + +2004-02-21 Jan Hubicka <jh@suse.cz> + + * cgraphunit.c (decide_is_function_needed): Nested functions of extern + inline functions don't need to be output. + (expand_function): Re-enable sanity check. + +2004-02-21 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa-loop.c (do_while_loop_p): New function. + (copy_loop_headers): Do not peel do-while loops. + +2004-02-21 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (cleanup_control_expr_graph): Update profile. + + * tree-cfg.c (disband_implicit_edges): Set fallthru edges correctly. + + * cfg.c (dump_flow_info): Work on trees too. + + * tree-pretty-print.c (dump_generic_bb_stuff): Do not touch bb + annotations when not allocated. + +2004-02-21 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (cprop_into_stmt): Look at the type's main variant + to determine if the two operands of a copy have equivalent types. + +2004-02-20 Jeff Law <law@redhat.com> + + * tree-flow-inline.h (may_propagate_copy): Do not perform ABNORMAL_PHI + and DECL_HARD_REGISTER tests on virtual operands. + * tree-flow.h (propagate_copy): Kill prototype. + (propagate_value): New prototype. + * tree-ssa-dom.c (propagate_copy): Now static. + (propagate_value): No longer static. + +2004-02-20 Richard Henderson <rth@redhat.com> + + PR middle-end/14218 + * c-simplify.c (mark_labels_r): Move to ... + * gimplify.c (force_labels_r): ... here, and rename. + (gimplify_init_constructor): Invoke it. + * tree-simple.h (force_labels_r): Declare. + +2004-02-20 Richard Henderson <rth@redhat.com> + + PR opt/14194 + * tree-ssa-ccp.c (substitute_and_fold): Also mark new vars + if fold_stmt was successful. + +2004-02-20 Diego Novillo <dnovillo@redhat.com> + + * doc/invoke.texi: Add documentation for parameters + global-var-threshold and max-aliased-vops. + * params.def (PARAM_GLOBAL_VAR_THRESHOLD): Reformat help message. + (PARAM_MAX_ALIASED_VOPS): Rename from PARAM_MAX_ALIAS_SET_SIZE. + * params.h (MAX_ALIASED_VOPS): Rename from MAX_ALIAS_SET_SIZE. + Update all users. + * tree-ssa-alias.c (struct alias_map_d): Document fields. + Add fields total_alias_vops, grouped_p and may_aliases. + (struct alias_info): Change fields addressable_vars and + pointers to malloc'd arrays. Update all users. + Add fields num_references and total_alias_vops. + (compute_may_aliases): Add more comments. + (init_alias_info): Initialize new fields in struct alias_info. + (delete_alias_info): Corresponding changes. + (compute_points_to_and_addr_escape): Count references to + potentially aliased variables and pointer dereferences. + (compute_flow_insensitive_aliasing): Remove old grouping + heuristic. + Count the number of virtual operands induced by all the alias + sets created and call group_aliases if the number exceeds the + threshold set by --param max-aliased-vops. + (total_alias_vops_cmp): New. + (group_aliases_into): New. + (group_aliases): New. + * tree-ssa-operands.c (get_expr_operands): Change dump file + message when no flow-sensitive alias information is available. + (add_stmt_operand): Reformat comment. + * tree-ssa.c (init_tree_ssa): Don't call bitmap_clear. + + * tree-simple.c (get_base_decl): Fix typo in comment. + + * tree-pretty-print.c (print_call_name): Handle matrices of + function pointers. + +2004-02-20 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * Makefile.in (tree-ssa-loop.o): Add tree-inline.h dependency. + * basic-block.h (struct reorder_block_def): Moved from cfglayout.h. + (alloc_rbi_pool, initialize_bb_rbi, free_rbi_pool): New. + * bb-reorder.c (copy_bb): Use cfghooks for bb duplication. + * cfg.c (rbi_pool): New variable. + (alloc_rbi_pool, free_rbi_pool, initialize_bb_rbi): New functions. + * cfghooks.c (can_duplicate_block_p, duplicate_block): New functions. + * cfghooks.h (struct cfg_hooks): Add can_duplicate_block_p and + duplicate_block hooks. + (can_duplicate_block_p, duplicate_block): Declare. + * cfglayout.c (cfg_layout_pool, cfg_layout_initialize_rbi): Removed. + (fixup_reorder_chain): Use initialize_bb_rbi. + (cfg_layout_can_duplicate_bb_p, cfg_layout_duplicate_bb): Hookized. + (cfg_layout_initialize): Use cfg.c rbi pool manipulation functions. + (can_copy_bbs_p, copy_bbs): Use cfghooks for bb duplication. + * cfglayout.h (typedef struct reorder_block_def): Moved to + basic_block.h. + (cfg_layout_can_duplicate_bb_p, cfg_layout_duplicate_bb): Declaration + removed. + * cfgrtl.c (cfg_layout_create_basic_block): Use initialize_bb_rbi. + (rtl_cfg_hooks, cfg_layout_rtl_cfg_hook): Fill in can_duplicate_block_p + and duplicate_block fields. + * common.opt (ftree-ch): Add. + * flags.h (flag_tree_ch): Declare. + * jump.c (next_nonnote_insn_in_loop, duplicate_loop_exit_test, + copy_loop_headers): Removed. + * loop-unswitch.c (unswitch_loop): Use cfghooks for bb duplication. + * opts.c (decode_options): Enable flag_tree_ch at -O1. + (common_handle_option): Handle -ftree_ch. + * rtl.h (copy_loop_headers): Declaration removed. + * timevar.def (TV_TREE_CH): New. + * toplev.c (flag_tree_ch): New. + (rest_of_compilation): Do not call copy_loop_headers. + * tracer.c (tail_duplicate): Use cfghooks for bb duplication. + * tree-cfg.c (build_tree_cfg): Call alloc_rbi_pool. + (create_bb): Call initialize_bb_rbi. + (delete_tree_cfg): Call free_rbi_pool. + (tree_duplicate_bb): Hookize. + (tree_can_duplicate_bb_p): New. + (tree_cfg_hooks): Fill in can_duplicate_block_p and duplicate_block + fields. + * tree-flow.h (tree_duplicate_bb): Declaration removed. + * tree-optimize.c (init_tree_optimization_passes): Add pass_ch. + * tree-pass.h (pass_ch): Declare. + * tree-ssa-loop.c: Include tree-inline.h. + (call_expr_p, should_duplicate_loop_header_p, mark_defs_for_rewrite, + duplicate_blocks, copy_loop_headers, gate_ch): New functions. + (pass_ch): New. + * doc/invoke.texi (-fdump-tree-ch, -ftree-ch): Document. + +2004-02-19 David Edelsohn <edelsohn@gnu.org> + + * config/rs6000/aix.h (MFWRAP_SPEC): Define. + (MFLIB_SPEC): Define. + +2004-02-19 Jeff Law <law@redhat.com> + + * tree-ssa-phiopt.c (tree_ssa_phiopt): TRUTH_NOT_EXPR is valid + gimple code. + +2004-02-19 Steven Bosscher <stevenb@suse.de> + + * tree-cfg.c (cleanup_dead_labels): New function to remove + redundant labels. + + Remove the RTL inliner. + * calls.c (try_to_integrate): Remove. + (expand_call): Do not try to expand calls inline. + * dbxout.c (dbxout_symbol_location): Don't mention integrate.c + in comments. + * expmed.c (extract_fixed_bit_field): Always propagate the + target for the shift if it is a REG. + * expr.c (emit_move_insn_1): Don't generate inline warnings. + (expand_expr_real_1): Don't look at inline_function_decl. + Don't output inlined functions here. + * expr.h (expand_inline_function): Remove prototype. + * emit-rtl.c (copy_most_rtx): Don't copy the integrated flag. + Copy the new return_val flag. + * final.c (final): Don't look at RTX_INTEGRATED_P. + * cfgrtl.c (create_basic_block_structure): Likewise. + * haifa-sched.c (priority): Likewise. + (restore_line_notes): Likewise. + * function.c (inline_function_decl): Remove. + (put_var_into_stack): Don't use it. + (fix_lexical_addr): Likewise. + * function.c (inline_function_decl): Remove extern declaration. + * genattrtab.c (ATTR_PERMANENT_P): Use the return_val flag + instead of the integrated flag. + * integrate.c (INTEGRATE_THRESHOLD): Remove. + (setup_initial_hard_reg_value_integration): Likewise. + (initialize_for_inline): Likewise. + (note_modified_parmregs): Likewise. + (integrate_parm_decls): Likewise. + (process_reg_param): Likewise. + (save_parm_insns): Likewise. + (copy_insn_list): Likewise. + (copy_insn_notes): Likewise. + (compare_blocks): Likewise. + (find_block): Likewise. + (inlining): Likewise. + (function_cannot_inline_p): Likewise. + (parmdecl_map): Likewise. + (in_nonparam_insns): Likewise. + (save_for_inline): Likewise. + (FIXED_BASE_PLUS): Likewise. + (expand_inline_function): Likewise. + (copy_rtx_and_substitute): Don't look at map->integrating, + map->inline_target, and inlining, since we are never copying + for integrating. + Don't abort on RTX_INTEGRATED_P. + (old_fun): Remove. + (output_inline_function): Remove. + * integrate.h (struct inline_map): Remove fields integrating, + block_map, leaf_reg_map, inline_target, and local_return_label. + * print-rtl.c (print_rtx): Don't print the integrated flag. + Print the return_val flag. + * rtl.h (struct rtx_def): Replace the integrated flag with the + return_val flag. + (RTX_INTEGRATED_P): Remove. + (notice_rtl_inlining_of_deferred_constant): Remove prototype. + * stmt.c (force_label_rtx): Don't look at inline_function_decl. + * toplev.c (rest_of_handle_inlining): Remove. + (rest_of_compilation): Don't call it, and never jump to exit. + Call convert_from_eh_region_ranges. + (wrapup_global_declarations): Don't output nested inlined functions. + * tree.h (function_cannot_inline_p): Remove prototype. + (save_for_inline): Ditto. + (output_inline_function): Ditto. + * unroll.c (unroll_loop): Don't clear map->inline_target. + * varasm.c (notice_rtl_inlining_of_deferred_constant): Remove. + + * system.h: Poison INTEGRATE_THRESHOLD. + * config/avr/avr.h: Remove define. + * config/ip2k/ip2k.h: Likewise. + + * unwind-sjlj.c (uw_install_context): Make a proper static inline + function. + + * doc/rtl.texi: Remove references to the integrated flag. + * doc/tm.texi: Remove documentation of INTEGRATE_THRESHOLD. + +2004-02-17 Andrew Macleod <amacleod@redhat.com> + + * tree-ssa-live.c (coalesce_tpa_members): Don't coalesce partitions + which are not in the same TPA group. + * tree-ssa.c (rewrite_out_of_ssa): Coalesce via list first. + +2004-02-17 Brian Booth <bbooth@redhat.com> + + * tree-ssa-ccp.c (substitute_and_fold): Update stmt after + calling fold_stmt. + +2004-02-16 Andrew Pinski <pinskia@physics.uc.edu> + + * config/rs6000/rs6000.c (output_function_profiler): Check + cfun->static_chain_decl instead of current_function_needs_context. + +2004-02-16 Jeff Law <law@redhat.com> + + * tree-ssa.dse.c (dse_optimize_stmt): Dump info when we delete + stores. + + * tree-ssa-dse.c: Update comments. + + * Makefile.in (OBJS-common): Add tree-ssa-dse.o + (tree-ssa-dse.o): Add dependencies. + * common.opt (ftree-dse): New option. + * flags.h (flag_tree_dse): New. + (flag_tree_dom): Fix comments. + * opts.c (decode_options): Turn on flag_tree_dse. + (common_handle_option): Handle OPT_ftree_dse. + * timevar.def (TV_TREE_PHIOPT): Update text. + (TV_TREE_DSE): New timevar. + * toplev.c (flag_tree_dse): New. + (flag_tree_dom): Fix comments. + (lang_independent_options): Add -ftree-dse. + * tree-dfa.c (redirect_immediate_use): New function. + (redirect_immediate_uses): New function. + * tree-flow.h (stmt_ann_d): Add UID field. + (redirect_immediate_uses): Declare. + * tree-optimize.c (init_tree_optimization_passes): Link in DSE pass. + * tree-pass.h (pass_dse): Declare. + * tree-ssa-dse.c: New file implementing DSE. + * doc/invoke.texi: Document new option. + +2004-02-16 Richard Henderson <rth@redhat.com> + + * tree-nested.c: New file. + * Makefile.in (OBJS-common, GTFILES, tree-nested.o): Add it. + * builtin-types.def (BT_FN_VOID_PTR_PTR, BT_FN_VOID_PTR_PTR_PTR): New. + * builtins.c (expand_builtin_nonlocal_goto): New. + (expand_builtin_apply): Fix prepare_call_address args. + (round_trampoline_addr): Move from function.c. + (expand_builtin_init_trampoline): New. + (expand_builtin_adjust_trampoline): New. + (expand_builtin): Invoke them. + (build_function_call_expr): Add CALL_EXPR chain operand. + * builtins.def (BUILT_IN_INIT_TRAMPOLINE, + BUILT_IN_ADJUST_TRAMPOLINE, BUILT_IN_NONLOCAL_GOTO): New. + * c-decl.c (finish_function): Call lower_nested_functions. + (c_expand_decl): Don't declare_nonlocal_label. + * calls.c (prepare_call_address): Replace fndecl arg with a + precomputed static chain value. + (expand_call): Precompute the static chain value. Use + update_nonlocal_goto_save_area. + * cgraph.c (cgraph_mark_reachable_node): Don't force nested + functions to be reachable. + (cgraph_clone_node): Don't abort cloning functions containing + nested functions. + * cgraphunit.c (cgraph_assemble_pending_functions): Don't do + anything special for nested functions. + (cgraph_mark_functions_to_output): Likewise. + (cgraph_estimate_growth, cgraph_clone_inlined_nodes): Likewise. + (cgraph_optimize): Likewise. + (cgraph_finalize_function): Don't zap DECL_SAVED_INSNS. + (cgraph_expand_function): Allow functions to not be emitted. + * defaults.h (TRAMPOLINE_ALIGNMENT): Move from function.c. + * dwarf2out.c (gen_subprogram_die): Generate DW_AT_static_link. + * emit-rtl.c (maybe_set_first_label_num): New. + * explow.c (update_nonlocal_goto_save_area): New. + (allocate_dynamic_stack_space): Use it. + * expr.c (expand_expr_real_1) <LABEL_DECL>: Don't force_label_rtx. + <COND_EXPR>: Ignore the possibility of non-local labels. + <ADDR_EXPR>: Don't do trampoline_address. + * expr.h (lookup_static_chain): Remove. + (prepare_call_address): Update 2nd arg. + (update_nonlocal_goto_save_area): Declare. + * final.c (profile_function): Update static chain test. + * function.c (TRAMPOLINE_ALIGNMENT): Move to defaults.h. + (trampolines_created): Move to varasm.c. + (free_after_compilation): Update for removed fields. + (allocate_struct_function): Likewise. + (delete_handlers, lookup_static_chain): Remove. + (fix_lexical_addr): Don't consider non-local variable refs. + (trampoline_address): Remove. + (round_trampoline_addr): Move to builtins.c. + (adjust_trampoline_addr): Remove. + (expand_function_start): Update for changes to static chain + and nonlocal goto handling. + (initial_trampoline): Move to varasm.c. + (expand_function_end): Don't build trampolines or kill + unreferenced nonlocal goto labels. + * function.h (struct function): Remove x_nonlocal_labels, + x_nonlocal_goto_handler_slots, x_nonlocal_goto_stack_level, + x_context_display, x_trampoline_list, needs_context. + Add static_chain_decl, nonlocal_goto_save_area. + * gimple-low.c (record_vars): Don't record functions. + * gimplify.c (declare_tmp_vars): Export. + (create_artificial_label): Set type. + (gimplify_expr): Don't consider nonlocal gotos. + * integrate.c (expand_inline_function): Kill lookup_static_chain ref. + * jump.c (any_uncondjump_p): Reject nonlocal goto. + * rtl.h (maybe_set_first_label_num): Declare. + * stmt.c (label_rtx): Set LABEL_PRESERVE_P appropriately. + (expand_label): Handle DECL_NONLOCAL and FORCED_LABEL. + (declare_nonlocal_label): Remove. + (expand_goto): Don't handle nonlocal gotos. + (expand_nl_handler_label): Remove. + (expand_nl_goto_receivers): Remove. + (expand_end_bindings): Don't expand_nl_goto_receivers. Use + update_nonlocal_goto_save_area. + * tree-cfg.c (make_edges): Handle abnormal edges out of block + falling through to EXIT. + (make_ctrl_stmt_edges): Don't check GOTO_EXPR for nonlocal goto. + Handle computed goto with no destinations. + (tree_can_merge_blocks_p): Don't merge blocks with nonlocal labels. + (remove_useless_stmts_label, stmt_starts_bb_p): Likewise. + (tree_forwarder_block_p): Likewise. + (nonlocal_goto_p): Remove. + (tree_verify_flow_info): Update to match. + * tree-dump.c (dump_files): Add tree-nested. + * tree-flow.h (nonlocal_goto_p): Remove. + * tree-inline.c (setup_one_parameter): Split out from ... + (initialize_inlined_parameters): ... here. Handle static chain. + (inline_forbidden_p_1): Update nonlocal goto check. + (expand_call_inline): Disable mysterious cgraph abort. + * tree-optimize.c (tree_rest_of_compilation): Save DECL_SAVED_INSNS. + * tree-pretty-print.c (dump_generic_node): Print static chain + and nonlocal label. + * tree-simple.h (declare_tmp_vars): Declare. + (lower_nested_functions): Declare. + * tree-ssa-dom.c (propagate_value): Avoid sharing problems. + * tree-ssa-operands.c (get_expr_operands): Walk static chain + field of call_expr. + * tree.def (CALL_EXPR): Add static chain operand. + * tree.h (NONLOCAL_LABEL): Remove. + (TDI_nested): New. + * varasm.c (TRAMPOLINE_ALIGNMENT): Remove. + (initial_trampoline): Move from function.c. + (assemble_trampoline_template): Set and return it. + (trampolines_created): Move from function.c. + +2004-02-16 Steven Bosscher <stevenb@suse.de> + + * tree-flow.h (cleanup_control_expr_graph): Don't declare here. + * tree-cfg.c (cleanup_control_expr_graph): Make static. + (find_edge_taken_cond_expr): Return an edge if the true and false + edges of a branch lead to the same basic block. + +2004-02-13 Diego Novillo <dnovillo@redhat.com> + + * tree-phinodes.c (resize_phi_node): Do not use ggc_realloc to + allocate a new PHI node. + +2004-02-12 Diego Novillo <dnovillo@redhat.com> + + * tree-flow.h (kill_redundant_phi_nodes): Remove declaration. + * tree-optimize.c (init_tree_optimization_passes): Add + pass_redundant_phi after DOM and CCP. + (execute_todo): Do not call kill_redundant_phi_nodes. + * tree-pass.h (TODO_redundant_phi): Remove. + Update all users. + Adjust values for all the other TODO_* entries. + (pass_redundant_phi): Declare. + * tree-ssa.c (replace_immediate_uses): Call mark_new_vars_to_rename + if a pointer was replaced. + (kill_redundant_phi_nodes): Make static. + (pass_redundant_phi): Define. + +2004-02-12 Dale Johannesen <dalej@apple.com> + + * Makefile.in (OBJS-common): Add rtl-profile.o, tree-profile.o. + (profile.o): Add tree-flow.h dependency. + (rtl-profile.o): New rule. + (tree-profile.o): New rule. + (GTFILES): Add tree-profile.c, rtl-profile.c. + * basic-block.h (flow_call_edges_add): Remove. + * cfganal.c (need_fake_edge_p): Move to cfgrtl.c. + (flow_call_edges_add): Move to cfgrtl.c. + * cfghooks.c: (block_ends_with_call_p): New. + (block_ends_with_condjump_p): New. + (flow_call_edges_add): New. + * cfghooks.h: (struct cfg_hooks): add block_ends_with_call_p, + block_ends_with_condjump_p, flow_call_edges_add. + (block_ends_with_call_p): New declaration. + (block_ends_with_condjump_p): New declaration. + (flow_call_edges_add): New declaration. + * cfgrtl.c (rtl_block_ends_with_call_p): New. + (rtl_block_ends_with_condjump_p): New. + (need_fake_edge_p): Moved from cfganal.c. + (rtl_flow_call_edges_add): Moved from cfganal.c (flow_call_edges_add). + (rtl_cfg_hooks): Add rtl_block_ends_with_call_p, + rtl_block_ends_with_condjump_p, rtl_flow_call_edges_add. + (cfg_layout_rtl_cfg_hooks): Ditto. + * common.opt (ftree-based-profiling): New. + * coverage.c (tree_ctr_tables): New. + (coverage_counter_alloc): Use it. + (build_ctr_info_value): Ditto. + (coverage_counter_ref): Ditto. Rename to rtl_coverage_counter_ref. + (tree_coverage_counter_ref): New. + * coverage.h (coverage_counter_ref): Remove declaration. + (rtl_coverage_counter_ref): New declaration. + (tree_coverage_counter_ref): New declaration. + * opts.c (OPT_ftree_based_profiling): New. + * profile.c: Include cfghooks.h, tree-flow.h. + (profile_hooks): New. + (profile_dump_file): New. + (instrument_edges): Use hooks instead of RTL-specific code. + (instrument_values): Ditto. + (get_exec_counts): Ditto. + (compute_branch_probabilities): Ditto. + (compute_value_histograms): Ditto. + (branch_prob): Ditto. + (find_spanning_tree): Ditto. + (end_branch_prob): Ditto. + (gen_edge_profiler): Move to rtl-profile.c (rtl_gen_edge_profiler). + (gen_interval_profiler): Ditto (rtl_gen_interval_profiler). + (gen_pow2_profiler): Ditto (rtl_gen_pow2_profiler). + (gen_one_value_profiler): Ditto (rtl_gen_one_value_profiler). + (tree_register_profile_hooks): New. + (rtl_register_profile_hooks): New. + * rtl-profile.c: New file. + * rtl.h (init_branch_prob): Move declaration to value-prof.h. + (end_branch_prob): Ditto. + (branch_prob): Ditto. + * toplev.c (flag_tree_based_profiling): New. + (f_options): Add -ftree-based-profiling. + (compile_file): Register rtl-based CFG and profiling hooks. + (rest_of_compilation): Do rtl-based profiling only when + !flag_tree_based_profiling. Register rtl-based profiling hooks. + (process_options): Sorry for -ftree-based-profiling plus + -ftest-coverage or -fprofile-values. + * toplev.h (flag_tree_based_profiling): New. + * tree-cfg.c (tree_block_ends_with_call_p): New. + (tree_block_ends_with_condjump_p): New. + (need_fake_edge_p): New. + (tree_flow_call_edges_add): New (largely from flow_call_edges_add + in cfganal.c). + (tree_cfg_hooks): Add tree_block_ends_with_call_p, + tree_block_ends_with_condjump_p, tree_flow_call_edges_add. + * tree-optimize.c (init_tree_optimization_passes): + Add pass_tree_profile. + * tree-pass.h: Ditto. + * tree-profile.c: New file. + * value-prof.c (value_prof_hooks): New. + (find_values_to_profile): Rename to rtl_find_values_to_profile. + Move rtl-specific bits in from branch_prob. + (value_profile_transformations): Rename to + rtl_value_profile_transformations. + (struct value_prof_hooks): New. + (rtl_value_prof_hooks): New. + (rtl_register_value_prof_hooks): New. + (tree_find_values_to_profile): New stub. + (tree_value_profile_transformations): New stub. + (tree_value_prof_hooks): New stub. + (tree_register_value_prof_hooks): New stub. + (find_values_to_profile): New. + (value_profile_transformations): New. + * value-prof.h: Add multiple inclusion guard. + (struct histogram_value): Change rtx fields to void *. + (rtl_register_value_prof_hooks): New declaration. + (tree_register_value_prof_hooks): New declaration. + (find_values_to_profile): New declaration. + (free_profiled_values): New declaration. + (value_profile_transformations): New declaration. + (struct profile_hooks): New declaration. + (init_branch_prob): Declaration moved from rtl.h. + (branch_prob): Declaration moved from rtl.h. + (end_branch_prob): Declaration mooved from rtl.h. + (tree_register_profile_hooks): New declaration. + (rtl_register_profile_hooks): New declaration. + (tree_profile_hooks): New declaration. + (rtl_profile_hooks): New declaration. + * doc/invoke.texi: Document -ftree-based-profiling. + +2004-02-12 Jeff Law <law@redhat.com> + + * domwalk.c (walk_dominator_tree): Move statement walking from + clients into here. Walk statements in forward or backward order + as requested by the client. Walk either the dominator tree or + the post-dominator tree as requested by the client. + * domwalk.h (dom_walk_data): Add two fields to control direction of + statement walk and dominator vs post-dominator tree walk. Add + BSI argument to the per-statement callbacks. + * tree-ssa-dom.c (optimize_stmt): Update prototype so that it can + be directly used as a callback for the dominator tree walker. + Update stmts_to_rescan here. + (tree_ssa_dominator_optimize): Initialize new fields in the dominator + walker structure. Use optimize_stmt instead of dom_opt_walk_stmts + for statement callback. + (dom_opt_walk_stmts): Kill. No longer used. + * tree-ssa.c (mark_def_sites): Update prototype so that it can be + called as the per-statement callback. No longer walk statements here. + (mark_def_sites_initialize_block): New. + (rewrite_stmt): Update prototype so that it can be called as the + per-statement callback. + (rewrite_walk_stmts): Kill. No longer used. + (rewrite_into_ssa): Initialize new fields in the dominator walker + structure. Use rewrite_stmt instead of rewrite_walk_stmts. Add + mark_def_sites_initialize_block callback. + +2004-02-12 Steven Bosscher <stevenb@suse.de> + + * doc/cfg.texi: New file. + * doc/ggcint.texi: Include it. Add a new chapter. + +2004-02-11 Jeff Law <law@redhat.com> + + * Makefile.in (OBJS-common): Add tree-ssa-forwprop.o + (tree-ssa-forwprop.o): Add dependencies. + * timevar.def (TV_TREE_FORWPROP): New timevar. + * tree-optimize.c (init_tree_optimization_passes): Link in + the forward propagation pass. + * tree-pass.h (pass_forwprop): Declare. + * tree-ssa-forwprop.c: New file with forward propagation pass. + * doc/invoke.texi: Document dump for forward propagation pass. + +2004-02-11 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa.c (rewrite_out_of_ssa): Don't use coalesce list until new + bug resolved. + +2004-02-11 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-live.c (compare_pairs): New. Coalesce list cost function. + (sort_coalesce_list): Use qsort() to sort list by cost. + (coalesce_tpa_members): Use correct partition representatives. Add more + debug information. Allow coalesce by list, root_var, or both. + (tpa_dump): Show partition index. + * tree-ssa-live.h (SSANORM_COALESCE_PARTITIONS): New flag. + (SSANORM_USE_COALESCE_LIST): New flag. + * tree-ssa.c (create_temp): Don't mark as used when created. + (coalesce_ssa_name): Create coalesce list if requested. Add more + debug output. + (assign_vars): Add additional debug info. + (remove_ssa_form): Perform TER after assign_vars(). + (rewrite_vars_out_of_ssa): Pass coalesce partitions flag to + remove_ssa_form. + (rewrite_out_of_ssa): Add coalesce list flag to remove_ssa_form call. + +2004-02-10 Jeff Law <law@redhat.com> + + * Makefile.in (OBJS-common): Add tree-ssa-phiopt.o + (tree-ssa-phiopt.o): Add dependencies. + * timevar.def (TV_TREE_PHIOPT): New timevar. + * tree-cfg.c (extract_true_false_edges_from_block): Moved here from + tree-ssa-dom.c. + (tree_verify_flow_info): Use extract_true_false_edges_from_block. + * tree-flow.h (extract_true_false_edges_from_block): Declare. + * tree-ssa-dom.c (extract_true_false_edges_from_block): Moved into + tree-cfg.c. + (get_eq_expr_value): Improve type check. + * tree-optimize.c (init_tree_optimization_passes): Link in + phiopt pass. + * tree-pass.h (pass_phiopt): Declare. + * tree-ssa-phiopt.c: New file with PHI node optimization pass. + * doc/invoke.texi: Document dump for PHI node optimization. + +2004-02-10 Richard Henderson <rth@redhat.com> + + * tree-sra.c (lookup_scalar): Handle unnamed fields. + +2004-02-10 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (OBJS-common): Add tree-ssa-alias.o. + (tree-ssa-alias.o): New rule. + (tree-ssa-operands.o): Add dependency on $(TIMEVAR_H) and tree-pass.h + (gt-tree-dfa.h): Remove. + * timevar.def (TV_TREE_OPS): Rename from unused entry TV_TREE_DFA. + * tree-ssa-alias.c: New file. + * tree-dfa.c (struct alias_stats_d, alias_stats, dump_alias_stats, + may_alias_p, add_may_alias, global_var, aliases_computed_p, + compute_may_aliases): Move to tree-ssa-alias.c. + (struct walk_state): Remove fields 'is_asm_expr' and 'num_calls'. + Update all users. + (compute_alias_sets, create_memory_tags, may_access_global_mem_p, + get_memory_tag_for, promote_call_clobbered_vars, + find_addressable_vars): Remove. + (call_clobbered_vars): Move to tree-ssa-alias.c and convert to + bitmap. + (find_referenced_vars): Move logic to create .GLOBAL_VAR to + tree-ssa-alias.c. + (create_ssa_name_ann): New. + (dump_variable): Rearrange. + (dump_dfa_stats): Do not show the number of call clobbered + variables. + (find_vars_r): Do not try to determine if an assignment my access + global memory. + (add_referenced_var): Remove hacks to establish global memory + dependencies. + If the variable needs to live in memory mark it call-clobbered. + * tree-flow-inline.h (ssa_name_ann): New. + (get_ssa_name_ann): New. + (set_may_alias_global_mem): Remove. + (may_alias_global_mem_p): Remove. + (set_may_point_to_global_mem): Remove. + (may_point_to_global_mem_p): Remove. + (is_call_clobbered): New + (mark_call_clobbered): New + (mark_non_addressable): New + * tree-flow.h (enum tree_ann_type): Add SSA_NAME_ANN. + (enum mem_tag_kind): Declare. + (struct var_ann_d): Remove fields 'is_call_clobbered', + 'may_alias_global_mem' and 'may_point_to_global_mem'. + Replace bitfield 'mem_tag' with enum bitfield 'mem_tag_kind'. + Rename field 'mem_tag' to 'type_mem_tag'. + (struct stmt_ann_d): Change type of field 'addresses_taken' to a + bitmap. Update all users. + (struct ssa_name_ann_d): Declare. + (union tree_ann_d): Add field 'ssa_name'. + (ssa_name_ann_t): New type. + (struct bb_ann_d): Add field 'has_escape_site'. + (num_call_clobbered_vars): Remove. + (call_clobbered_var): Remove. + (call_clobbered_vars): Change to bitmap. + (dump_points_to_info): Declare. + (debug_points_to_info): Declare. + (walk_use_def_chains_fn): New type. + (walk_use_def_chains): Declare. + (is_call_clobbered): Declare. + (mark_call_clobbered): Declare. + * tree-simple.c (needs_to_live_in_memory): Move to tree.c. + (is_gimple_non_addressable): Update comment. + (is_gimple_call_clobbered): Remove. + (get_call_expr_in): New. + (get_base_var): Rename from get_base_symbol. Update all callers. + Don't strip SSA_NAME wrappers. + (get_base_decl): New. + (get_base_address): New. + * tree-simple.h (is_gimple_call_clobbered): Remove. + (needs_to_live_in_memory): Remove. + (get_base_decl): Declare. + (get_base_var): Declare. + (get_base_address): Declare. + * tree-ssa-dce.c (need_to_preserve_store): Reduce to calling + needs_to_live_in_memory. + * tree-ssa-operands.c: Include tree-pass.h and timevar.h + (get_stmt_operands): Push/pop TV_TREE_OPS time var. + Call mark_call_clobbered for asms that store to memory. + (get_expr_operands): When adding operands for INDIRECT_REF + expressions, use flow-sensitive aliasing, if available. + Assume that malloc-like function calls won't clobber. + (add_call_clobber_ops): + (add_call_read_ops): + * tree-ssa.c (rewrite_into_ssa): If any variable in vars_to_rename + is a pointer, invalidate all name memory tags. + (create_temp): Call is_call_clobbered and mark_call_clobbered. + (walk_use_def_chains_1): New. + (walk_use_def_chains): New. + + * tree.c (needs_to_live_in_memory): New. + * tree.h (DECL_NEEDS_TO_LIVE_IN_MEMORY_INTERNAL): Define. + (struct tree_decl): Add bitfield 'needs_to_live_in_memory'. + Update unused bits comment. + (needs_to_live_in_memory): Declare. + + * tree-simple.h (get_call_expr_in): Declare. + * tree-sra.c (scalarize_stmt): Call get_call_expr_in when handling + function calls. + * tree-ssa-ccp.c (likely_value): Likewise. + + * params.def (PARAM_MAX_CLOBBERED_VARS_GLOBAL_VAR): Remove. + (PARAM_MAX_CALLS_GLOBAL_VAR): Remove. + (PARAM_GLOBAL_VAR_THRESHOLD): Define. + (PARAM_MAX_ALIAS_SET_SIZE): Define. + Update all users. + * params.h (MAX_CALLS_FOR_GLOBAL_VAR): Remove. + (MAX_CLOBBERED_VARS_FOR_GLOBAL_VAR): Remove. + (GLOBAL_VAR_THRESHOLD): Define. + (MAX_ALIAS_SET_SIZE): Define. + +2004-02-09 Richard Henderson <rth@redhat.com> + + * langhooks.h (lang_hooks_for_functions): Add missing_noreturn_ok_p. + * langhooks-def.h, c-lang.c, objc/objc-lang.c + (LANG_HOOKS_FUNCTION_MISSING_NORETURN_OK_P): New. + * c-objc-common.c (c_missing_noreturn_ok_p): Return bool. + (c_objc_common_init): Don't set lang_missing_noreturn_ok_p. + * c-tree.h (c_missing_noreturn_ok_p): Update decl. + * flow.c (lang_missing_noreturn_ok_p): Remove. + + * flow.c (check_function_return_warnings): Move to tree-cfg.c. + * toplev.c (rest_of_compilation): Don't call it. + * tree-cfg.c (execute_warn_function_return): Move from flow.c, + rename, update for tree vs rtl. + (pass_warn_function_return): New. + * tree-pass.h (pass_warn_function_return): Declare it. + * tree-optimize.c (init_tree_optimization_passes): Run it. + + * function.h (struct function): Remove x_clobber_return_insn. + * function.c (free_after_compilation): Don't set it. + (expand_function_end): Likewise. + +2004-02-09 Richard Henderson <rth@redhat.com> + + Revert: + 2004-02-06 Richard Henderson <rth@redhat.com> + * tree-ssa-dom.c (record_equivalences_from_phis): Use + record_const_or_copy. + (record_equivalences_from_stmt): Likewise. Replace + block_avail_exprs_p and block_nonzero_vars_p args with bd. + +2004-02-09 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (get_eq_expr_value): Improve handling of boolean + conditions. + + * domwalk.c (walk_dominator_tree): Completely lose PARENT argument. + Callers updated. No longer pass PARENT to callbacks. + * domwalk.h (struct dom_walk_data): Corresponding changes. + * tree-ssa-dom.c: Likewise. + * tree-ssa.c: Likewise. + + * domwalk.c (walk_dominator_tree): Change last argument to be the + parent block in the dominator tree rather than the last statement + in the parent block in the dominator tree. Similarly in all the + callbacks. + * domwalk.h (struct dom_walk_data): Update callback prototypes. + * tree-ssa-dom.c: Corresponding changes. + * tree-ssa.c: Likewise. + + * tree-ssa-dom.c (redirect_edges_and_update_ssa_graph): Break out + of tree_ssa_dominator_optimize. If the out-of-ssa pass creates + new variables, then invalidate some requested jump threads. + +2004-02-08 Richard Henderson <rth@redhat.com> + + * flow.c (regno_uninitialized): Remove. + * output.h (regno_uninitialized): Remove. + * function.c (setjmp_vars_warning): Rename from + uninitialized_vars_warning, remove uninitialized vars warning. + * toplev.c (rest_of_handle_life): Update to match. + * tree.h (setjmp_vars_warning): Likewise. + + * tree-sra.c (lookup_scalar): Set DECL_NAME to something descriptive. + + * tree-ssa.c (warn_uninit): New. + (warn_uninitialized_var, warn_uninitialized_phi): New. + (execute_early_warn_uninitialized): New. + (execute_late_warn_uninitialized): New. + (gate_warn_uninitialized): New. + (pass_early_warn_uninitialized): New. + (pass_late_warn_uninitialized): New. + * tree-pass.h (pass_early_warn_uninitialized): New. + (pass_late_warn_uninitialized): New. + * tree-optimize.c (init_tree_optimization_passes): Add them. + +2004-02-08 Richard Henderson <rth@redhat.com> + + * cppexp.c (append_digit): Rearrange unsignedp/overflow setting. + (eval_token, num_binary_op, num_part_mul, num_div_op): Likewise. + * ra-rewrite.c (rewrite_program2): Zero info. + * reload.c (decompose): Zero val. + * tree-ssa-ccp.c (visit_phi_node): Zero phi_val.const_val. + +2004-02-07 Jan Hubicka <jh@suse.cz> + + * tree-inline.c (save_body): Clone the parm decl correctly. + + * cgraph.c: Add introductionary comment. + (cgraph_remove_node): Release DECL_SAVED_INSNS too. + * cgraphunit.c: Likewise. + (cgraph_finalize_function): Release DECL_SAVED_INSNS of external function. + (decl_expand_function): Release DECL_SAVED_INSNS/body/tree. + (cgraph_remove_unreachable_nodes): Likewise; guard cgraph verification. + +2004-02-06 Richard Henderson <rth@redhat.com> + + * common.opt (fdisable-tree-ssa): Remove. + * flags.h (flag_disable_tree_ssa): Remove. + * toplev.c (flag_disable_tree_ssa): Remove. + (f_options): Don't set it. + * opts.c (common_handle_option): Likewise. + * doc/invoke.texi (fdisable-tree-ssa): Remove. + +2004-02-06 Richard Henderson <rth@redhat.com> + + * tree-ssa-dom.c (record_equivalences_from_phis): Use + record_const_or_copy. + (record_equivalences_from_stmt): Likewise. Replace + block_avail_exprs_p and block_nonzero_vars_p args with bd. + +2004-02-06 Andrew Pinski <pinskia@physics.uc.edu> + + PR middle-end/13127 + * tree-inline.c (declare_return_variable): Set the no warning bit + on the variable created for the return value. + +2004-02-06 Richard Henderson <rth@redhat.com> + + * tree-pretty-print.c (dump_generic_node): Render NON_LVALUE_EXPR. + + * tree-ssa-dom.c (local_fold): New. + (thread_across_edge, simplify_rhs_and_lookup_avail_expr, + find_equivalent_equality_comparison): Use it. + +2004-02-06 Andrew Pinski <pinskia@physics.uc.edu> + + PR c/13863 + * c-common.c (c_decl_uninit_1): Remove. + (c_decl_uninit): Remove. + * c-common.h (c_decl_uninit): Remove prototype. + * c-lang.c (LANG_HOOKS_DECL_UNINIT): Delete. + * objc/objc-lang.c (LANG_HOOKS_DECL_UNINIT): Delete. + * c-simplify.c (gimplify_decl_stmt): Set TREE_NO_WARNING + on the decl where the initial is itself. + * function.c (uninitialized_vars_warning): Remove old comment + and check for DECL_INITIAL, replace with a check of TREE_NO_WARNING + and do not call the langhook. + * langhooks-def.h (LANG_HOOKS_DECL_UNINIT): Remove. + (LANG_HOOKS_INITIALIZER): Remove usage of LANG_HOOKS_DECL_UNINIT. + * langhooks.c (lhd_decl_uninit): Remove. + * langhooks.h (lhd_decl_uninit): Remove prototype. + +2004-02-05 Richard Henderson <rth@redhat.com> + + * tree-ssa-dom.c (record_const_or_copy_1): New. + (record_const_or_copy): New. + (thread_across_edge): Use it. + (dom_opt_finalize_block): Likewise. Tidy. + (record_equality): Split out from ... + (record_equivalences_from_incoming_edge): ... here. + +2004-02-05 Richard Henderson <rth@redhat.com> + + * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Allow + mixing PLUS and MINUS when folding operations. + +2004-02-05 Andrew Macleod <amacleod@redhat.com> + + * tree-pretty-print.c (dump_bb_header): Allow TDF_SLIM printing. + (dump_bb_end): Allow TDF_SLIM printing. + (dump_generic_bb_buff): Add flags parameter to dump_bb_end. + +2004-02-05 Jan Hubicka <jh@suse.cz> + + * alias.c (find_base_term, get_addr): Do not dereference NULL + pointer when all VALUE's locations has been invalidated. + (rtx_equal_for_memref_p): Simplify checking of VALUEs. + +2004-02-04 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ander.c (andersen_init): Reorder/Redo code so that we + actually free the memory in intraprocedural mode. + (andersen_cleanup): Ditto. + +2004-02-04 Richard Henderson <rth@redhat.com> + + * tree-ssa-ccp.c (get_value, visit_phi_node, + visit_assignment, dump_lattice_value): Tidy. + (evaluate_stmt): Don't do debug dump here. + (def_to_undefined): Merge into set_lattice_value. + (def_to_varying): Likewise, but retain as a wrapper. + (set_lattice_value): Tidy. Emit correct debug info. + (replace_uses_in): Remove strlen hacks. + (execute_fold_all_builtins): Fix DECL_BUILT_IN comparison. + Force folding of BUILT_IN_CONSTANT_P. + +2004-02-04 Richard Henderson <rth@redhat.com> + + * builtins.c (fold_builtin_expect): New. + (fold_builtin_1): Call it. + +2004-02-04 Jeff Law <law@redhat.com> + + * jump.c (duplicate_loop_exit_test): Allow copying of the loop + exit test even if we do not find the LOOP_END note. + + * domwalk.c: Update comments. + +2004-02-04 Brian Booth <bbooth@redhat.com> + + PR opt/13755 + * tree-dfa.c (compute_alias_sets): set rename flag for variables + aliased by GLOBAL_VAR. + +2004-02-04 Richard Henderson <rth@redhat.com> + + * tree-ssa-dom.c (simplify_switch_and_lookup_avail_expr): New. + (eliminate_redundant_computations): Call it. + +2004-02-03 Richard Henderson <rth@redhat.com> + + PR opt/13869 + * tree-cfg.c (cfg_remove_useless_stmts_bb): Correct handling of + boolean variables in COND_EXPR_COND. + +2004-02-03 Richard Henderson <rth@redhat.com> + + PR middle-end/13325 + * builtins.c (fold_builtin_1): Rename from fold_builtin. + (fold_builtin): New. + * c-simplify.c (gimplify_expr_stmt): Check TREE_NO_WARNING. + * stmt.c (expand_expr_stmt_value): Likewise. + * tree.h (struct tree_common): Add nowarning_flag. + (TREE_NO_WARNING): New. + (TREE_NO_UNUSED_WARNING): Remove. + * c-typeck.c (build_unary_op): Use TREE_NO_WARNING instead. + * stmt.c (warn_if_unused_value): Likewise. + +2004-02-03 Steven Bosscher <stevenb@suse.de> + + * tree-ssa-dce.c: Partial rewrite. The old DCE is now called + `conservative'. The more aggressive algorithm uses control + dependence and is called `aggressive' or cd-dce. + * timevar.def (TV_TREE_DCE): Rename. + (TV_TREE_CD_DCE, TV_CONTROL_DEPENDENCES): New timevars. + * tree-pass.h: Declare extern pass_cd_dce. + * tree-optimize.c (init_tree_optimization_passes): Replace + the final DCE pass with a CD-DCE pass. + +2004-02-01 Jan Hubicka <jh@suse.cz> + + * cgraphunit.c (cgraph_mark_inline_edge): Fix insertion to + cgraph_inline_hash. + +2004-01-30 Frank Ch. Eigler <fche@redhat.com> + + * common.opt: Add support for -fmudflapth, -fmudflapir. + * invoke.texi: Document them. + * opts.c: Ditto. + * flags.h: Add new flags flag_mudflap_threads, _ignore_reads. + * toplev.c: Initialize new flags. Remove redundant code from + lang_independent_options[]. + * tree-mudflap.c (*): Support new flag_mudflap_threads encoding. + (mf_xform_derefs_1): Support flag_mudflap_ignore_reads option. + * c-mudflap.c (mflang_flush_calls): Mark static ctor TREE_USED. + +2004-01-30 Ian Lance Taylor <ian@wasabisystems.com> + + * gengtype-yacc.y (bitfieldlen): Add empty action. + +2004-01-30 Diego Novillo <dnovillo@redhat.com> + + * configure.ac: Move configuration for libbanshee and + libgmp from configure.in. + +2004-01-30 Richard Henderson <rth@redhat.com> + + PR opt/13524 + * gengtype-yacc.y (struct_fields): Accept unnamed bitfields. + (bitfieldlen): Split from ... + (bitfieldopt): ... here. + * gimplify.c (mark_not_gimple): Remove. + (gimplify_call_expr): Don't ignore BUILT_IN_MD. + * tree-dfa.c (struct walk_state): Remove is_not_gimple. + (find_referenced_vars): Don't look for TREE_NOT_GIMPLE. + (find_vars_r, add_referenced_var): Likewise. + * tree-ssa-operands.c (get_stmt_operands, get_expr_operands): Likewise. + * tree-simple.h (mark_not_gimple): Remove. + * tree.h (struct tree_common): Remove not_gimple_flag. + (TREE_NOT_GIMPLE): Remove. + +2004-01-29 Jason Merrill <jason@redhat.com> + + PR c++/13865 + * c-simplify.c (gimplify_for_stmt): Reorganize to fix cleanups. + +2004-01-29 Richard Henderson <rth@redhat.com> + + PR c++/13543 + * tree-inline.c (initialize_inlined_parameters): Register the + substitute reference also. + +2004-01-29 Richard Henderson <rth@redhat.com> + + * tree-inline.c (gimple_expand_calls_inline): Look inside + RETURN_EXPR. + + * tree-pretty-print.c (dump_generic_node): If TDF_DETAILS, dump + both name and uid. + +2004-01-29 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * cfg.c (unlink_block): Reset prev_bb and next_bb. + +2004-01-29 Jeff Law <law@redhat.com> + Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-live.h (tpa_next_partition): Correctly handle compressed + elements. + * tree-ssa.c (coalesce_ssa_name): New argument, flags. Callers + updated. Test SSANORM_COMBINE_TEMPS in flags rather than + flag_tree_combine_temps. + (coalesce_vars): Either operand of a copy might not have a + partition when rewriting a subset of the variables out of SSA form. + (rewrite_vars_out_of_ssa): Honor -ftree-combine-temps by passing + in SSANORM_COMBINE_TEMPS in flags argument to remove_sas_form.. + +2004-01-29 Dale Johannesen <dalej@apple.com> + + * Makefile.in (OBJS-common): Move tree-nomudflap.o... + (OBJS-archive): ...to here, and remove duplicate tree-optimize.o. + +2004-01-28 Richard Henderson <rth@redhat.com> + + PR middle-end/13898 + * gimplify.c (gimplify_init_constructor): Invoke + lhd_set_decl_assembler_name on the now-static variable. + +2004-01-28 Richard Henderson <rth@redhat.com> + + PR opt/13798 + * expr.c (is_zeros_p): Remove. Change all callers to use + initializer_zerop. + (categorize_ctor_elements_1, categorize_ctor_elements): New. + (count_type_elements): New. + (mostly_zeros_p): Use them. + * gimplify.c (tmp_var_id_num): Split out from create_tmp_var_raw. + (create_tmp_var_name): Likewise. + (gimplify_init_constructor): Drop constructors to readonly memory + as indicated by categorize_ctor_elements and can_move_by_pieces. + * tree.c (initializer_zerop): Handle VECTOR_CST. Don't check + AGGREGATE_TYPE_P for CONSTRUCTOR. + * tree.h (categorize_ctor_elements): Declare. + (count_type_elements): Declare. + * Makefile.in (gimplify.o): Update dependencies. + (GTFILES): Add gimplify.c. + +2004-01-27 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mx_register_decls): Support VLAs. + (mf_xform_derefs_1): Disable checking shortcut for VLAs. + * c-simplify.c (gimplify_decl_stmt): Add mudflap xref comment. + * gimplify.c (gimplify_bind_expr): Ditto. + +2004-01-27 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c: Add more comments describing SSAPRE and + the various functions. + (generate_expr_as_of_bb): Use PRED, a basic block argument, instead of + j, the index of that bb. + (generate_vops_as_of_bb): Ditto. + (insert_occ_in_preorder_dt_order): Rename to + create_and_insert_occ_in_preorder_dt_order. + +2004-01-27 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (rename_1): Add some more comments. + +2004-01-25 Andrew Pinski <pinskia@physics.uc.edu> + + PR c/13748 + * c-decl.c (finish_function): Do not pass + the function on to optimizers if there was an error. + +2004-01-23 Richard Henderson <rth@redhat.com> + + PR opt/12941 + * combine.c (SHIFT_COUNT_TRUNCATED): Provide default value. + (simplify_comparison): Don't simplify (eq (zero_extract c 1 r) 0) + if SHIFT_COUNT_TRUNCATED is set. + +2004-01-21 Richard Henderson <rth@redhat.com> + + PR c/11267 + * c-decl.c (c_finalize): New. + (finish_function): Use it. Genericize and finalize only non-nested + functions. Register nested functions with cgraph. + * c-simplify.c: Include cgraph.h. + (c_genericize): Genericize nested functions. + * gimplify.c (gimplify_expr): Use DECL_SAVED_INSNS to access + the struct function for the context. + * Makefile.in (c-simplify.o): Update dependencies. + +2004-01-21 Steven Bosscher <stevenb@suse.de> + + PR opt/13767 + * tree-cfg.c (simple_goto_p): Remove NONLOCAL_LABEL check. + +2004-01-21 Dale Johannesen <dalej@apple.com> + + * tree-dfa.c: Fix comment. + +2004-01-21 Richard Henderson <rth@redhat.com> + + PR opt/13681 + * tree-ssa-operands.c (get_expr_operands): Handle (&x + c). + + * tree-ssa-ccp.c (maybe_fold_offset_to_component_ref): Handle + flexible array members and lookalikes. + +2004-01-21 Dale Johannesen <dalej@apple.com> + + * tree-ssa-dom.c (cprop_into_stmt): Add convert call + to prevent type mismatches. + +2004-01-21 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (load_modified_phi_result): PARM_DECL is okay + to not have a defbb. + (rename_1): Add a comment. + +2004-01-21 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (find_equivalent_equality_comparison): Treat + CONVERT_EXPRs just like NOP_EXPRs. + (record_equivalences_from_stmt): Similarly. + (thread_across_edge): Fix formatting goof. + + * tree-ssa-dom.c (thread_across_edge): Remove bogus restriction + which prevents threading around to the top of a loop. + + * tree-ssa-dom.c (thread_across_edge): Handle SWITCH_EXPRs in the + target block in addition to COND_EXPRs. + + * tree-ssa-dom.c (thread_across_edge): Create equivalences for + PHIs before looking at the statements in the destination + block. + +2004-01-20 Roger Sayle <roger@eyesopen.com> + + * fold-const.c (fold_convert): Rename to fold_convert_const. + (fold_convert_const): Change arguments to take a tree_code, + a type and the operand/expression to be converted. Return + NULL_TREE if no simplification is possible. Add support for + FIX_CEIL_EXPR and FIX_FLOOR_EXPR in addition to FIX_TRUNC_EXPR. + (fold): Handle FIX_CEIL_EXPR and FIX_FLOOR_EXPR. + Adjust call to fold_convert to match new fold_convert_const. + Avoid modifying the tree passed to fold in-place. + (nondestructive_fold_unary_to_constant): Likewise, simplify + call to fold_convert to match new fold_convert_const. + +2004-01-20 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ander.c (andersen_op_assign): Update + prototype. Make this handle &x in the operands using + the addrargs parameter. + (andersen_init): Turn off ip_partial until variables + aliasing variables in other functions is resolved. + (andersen_add_var): Use newly renamed alias_var_new_with_aterm. + Fix comment. + (andersen_add_var_same): Ditto. + (andersen_function_call): Use ip_partial, not flag_unit_at_a_time. + * tree-alias-common.c (get_values_from_constructor): Add bitmap + and int * arguments. Used to mark operands that we are taking + address of. + (get_alias_var_decl): We should never see FIELD_DECL's right now. + (intra_function_call): Reverse ordering for slightly faster + projection merging. + (find_op_of_decl): New function. + (find_func_aliases): Use it. + Comment x = foo.y case. + Move get_alias_var_decl of arguments so we only call it if + necessary. + Handle address of arguments in operations. + (create_fun_alias_var): tvar->var. + Set context of fakeargs. + Set context of fakedecls. + Set DECL_PTA_ALIASVAR of RETURN_DECL's. + (create_fun_alias_var_ptf): tvar->var. + Set context of fakedecls. + (create_alias_vars): Only create alias vars for globals + with DECL_INITIAL's. + * tree-alias-common.h (struct tree_alias_ops): + Update op_assign arguments. + (may_alias): Fix comment. + (same_points_to_set): Ditto. + (empty_points_to_set): Ditto. + * tree-alias-type.h: Rename alias_tvar_new_with_aterm + -> alias_var_new_with_aterm. + * tree-alias-type.c: Ditto. + +2004-01-20 Richard Henderson <rth@redhat.com> + + * tree-sra.c (get_scalar_for_field): Validate field. + (create_scalar_copies): Iterate over rhs fields too. + +2004-01-19 Dale Johannesen <dalej@apple.com> + + * params.def: Add PARAM_MAX_CALLS_GLOBAL_VAR and + PARAM_MAX_CLOBBERED_VARS_GLOBAL_VAR. + params.h: Ditto. + tree-dfa.c: Use them. + doc/invoke.texi: Document them. + +2004-01-19 Jeff Law <law@redhat.com> + + * tree-ssa.c (insert_phi_nodes_for): Always use fully pruned + SSA form. + + * tree-flow.h: Update copyright dates. + (register_new_def): Declare. + * tree-ssa-dom.c: Update copyright dates. + Add tracking of current definition of each program variable just + like we do when rewriting into SSA form. + (get_value_for, set_value_for): Handle either an SSA_NAME or + regular variable. + (tree_ssa_dominator_optimize): Initialize and update CURRDEFS. + If we thread through a block with real statements, the destination + of those statements must be rewritten too. + (thread_across_edge): Skip nop statements at the start of a + block. + (dom_opt_initialize_block_local_data): Clear block_defs + appropriately. + (record_equivalences_from_phis): Accept walk_data structure. + Call register_new_def appropriately. + (optimize_stmt): Call register_new_defs_for_stmt. + (dom_opt_finalize_block): Restore CURRDEFS appropriately. + (register_new_definitions_for_stmt): New. + * tree-ssa.c: Update copyright dates. + (register_new_def): No longer static. Accept additional argument + for the table to hold the new definition. Callers updated. + + * gimplify.c: Update copyright dates. + * tree-cfg.c: Likewise. + * tree.h: Likewise. + + * tree-iterator.c, tree-iterator.c: Use GCC rather than GNU CC. + * tree-ssa-pre.c, tree-ssa-live.h: Likewise. + +2004-01-19 Daniel Berlin <dberlin@dberlin.org> + + * timevar.def (TV_TREE_SPLIT_EDGES): New timevar. + * tree-ssa-pre.c (split_critical_edges): Move from here + (pass_pre): Add PROP_no_crit_edges as required. + * tree-cfg.c (split_critical_edges): to here. + (pass_split_crit_edges): New pass. + * tree-optimize.c (tree_optimization_passes): Add NEXT_PASS + (split_crit_edges). + * tree-pass.h: Add PROP_no_crit_edges. + (pass_split_crit_edges): Declared. + +2004-01-19 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_build_check_statement_for): Tolerate + incoming locus NULL pointer. + +2004-01-18 Richard Henderson <rth@redhat.com> + + * builtins.c (simplify_builtin_strcpy): Export. Take strlen argument. + (simplify_builtin_strncpy, simplify_builtin_strcmp): Similarly. + (simplify_builtin_strncmp): Similarly. + (simplify_builtin): Update to match. + * expr.h (simplify_builtin_strcmp, simplify_builtin_strncmp, + simplify_builtin_strcpy, simplify_builtin_strncpy): Declare. + * tree-pass.h (pass_fold_builtins): New. + * tree-optimize.c (init_tree_optimization_passes): Add it. + * tree-ssa-ccp.c (ccp_fold_builtin): Handle BUILT_IN_STRCPY, + BUILT_IN_STRNCPY, BUILT_IN_STRCMP, BUILT_IN_STRNCMP. + (get_strlen): Don't cast to size_t. + (execute_fold_all_builtins, pass_fold_builtins): New. + +2004-01-19 Jan Hubicka <jh@suse.cz> + + PR opt/13729 + * cgraphunit.c (cgraph_finalize_compilation_unit): Fix memory leak. + (cgraph_remove_unreachable_nodes): Do not mix analyzed and + DECL_SAVED_TREE flags. + +2004-01-18 Richard Henderson <rth@redhat.com> + + * tree-sra.c (REALPART_INDEX, IMAGPART_INDEX): Remove. + (sra_candidates, needs_copy_in): Use a bitmap. Update all users. + (struct sra_elt, sra_elt_hash, sra_elt_eq): New. + (sra_map_size): Remove. + (sra_map): Use a htab_t. + (lookup_scalar): Update to match. + (get_scalar_for_field, get_scalar_for_complex_part): Likewise. + (scalarize_structure_assignment): Use annotate_all_with_locus. + (csc_build_component_ref): Remove index argument. + (csc_build_complex_part): Take tree_code, not index. + (create_scalar_copies): Don't collect indicies. + (emit_scalar_copies): New. + (scalarize_modify_expr, scalarize_tree_list): Use it. + (scalarize_return_expr): Likewise. + (scalarize_structures): Simplify needs_copy_in iteration. + (scalarize_call_expr): Use annotate_all_with_locus. + (dump_sra_map_trav): Split from ... + (dump_sra_map): ... here. Update for hash table. + (tree_sra): Update for new datastructures. + +2004-01-18 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (dump_function_to_file): Move ";; Function" header ... + * tree-optimize.c (execute_one_pass): ... here. + +2004-01-17 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c: s@_typevar@_var@g, s@_TVAR@_VAR@g, + s@_TYPEVAR@_VAR@g + * tree-alias-common.h: Ditto + * tree.h: Ditto + * tree-alias-ander.c: Ditto + * tree-alias-type.c: Ditto + * tree-alias-type.h: Ditto + +2004-01-17 Richard Henderson <rth@redhat.com> + + * tree-complex.c (gimplify_val): Copy TREE_BLOCK. + + * tree-complex.c (gimplify_val): New. + (extract_component, do_binop, do_unop): Use it. + +2004-01-17 Richard Henderson <rth@redhat.com> + + * tree-complex.c (expand_complex_operations_1): Fix RETURN_EXPR + thinko in last change. + +2004-01-18 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * cfghooks.c (split_block): Don't redirect edges. + * cfgrtl.c (rtl_split_block): Do it here. + * tree-cfg.c (tree_split_block): Ditto. + +2004-01-17 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (verify_expr): Tidy. Check COND_EXPR for boolean + condition. + +2004-01-17 Jan Hubicka <jh@suse.cz> + + PR optimization/11761 + * Makefile.in: Remove tree-simple.c from GTYized files. + * tree-dfa.c (find_addressable_vars): Parse nontrivial ADDR_EXPRs. + (discover_nonconstant_array_refs_r): New static function. + (discover_nonconstant_array_refs): New global function. + * tree-flow.h (discover_nonconstant_array_refs): Declare. + * tree-simple.c (types_checked, types_in_memory): Kill. + (struct_needs_to_live_in_memory): Kill. + (needs_to_live_in_memory): aggregates are safe. + * tree-ssa.c (rewrite_out_of_ssa): Call the new function. + +2004-01-17 Richard Henderson <rth@redhat.com> + + PR opt/13718 + * tree-complex.c (expand_complex_comparison): Handle COND_EXPR. + (expand_complex_operations_1): Likewise. + +2004-01-17 Richard Henderson <rth@redhat.com> + + * tree-sra.c (scalarize_tree_list): Take bitmap argument to + avoid emitting duplicates. Update all callers. + +2004-01-17 Richard Henderson <rth@redhat.com> + + PR opt/13718 + * tree-complex.c (expand_complex_comparison): New. + (expand_complex_operations_1): Handle EQ_EXPR and NE_EXPR. + +2004-01-16 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c (get_alias_var): Handle BIT_FIELD_REF. + (find_func_aliases): Ditto. + Update for fact that basic component_refs are no longer + is_gimple_variable. + (create_fun_alias_var): Set DECL_CONTEXT on our faked declarations. + (pass_del_pta): PTA dumps info on delete, so it needs a name. + +2004-01-16 Steven Bosscher <stevenb@suse.de> + + * tree-optimize.c (init_tree_optimization_passes): Run DCE + before the first dominator optimization pass. + +2004-01-15 Brian Booth <bbooth@redhat.com> + Richard Henderson <rth@redhat.com> + + * tree-sra.c (REALPART_INDEX, IMAGPART_INDEX): New. + (sra_map_size): New. + (make_temp): New. + (mark_all_vdefs): New. + (is_sra_candidate_decl): New. + (is_sra_candidate_ref): New. + (lookup_scalar): Use sra_map_size, make_temp. + (get_scalar_for_field): Rename from get_scalar_for. + (get_scalar_for_complex_part): New. + (can_be_scalarized_p): Handle COMPLEX_TYPE. + (scalarize_component_ref): Handle REAL/IMAGPART_EXPR. + (scalarize_structure_assignment): Tidy. + (find_candidates_for_sra): Handle COMPLEX_TYPE, return bool. + (csc_assign, csc_build_component_ref): Split out from ... + (create_scalar_copies): ... here. Handle COMPLEX_TYPE. + (csc_build_complex_part): New. + (scalarize_modify_expr): Use is_sra_candidate_foo. + (scalarize_tree_list): Likewise. + (scalarize_return_expr): Likewise. + (dump_sra_map): Split out from ... + (tree_sra): ... here. Tidy. + +2004-01-15 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_xform_derefs): Accept void return statements. + +2004-01-15 Andrew MacLeod <amacleod@redhat.com> + Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (remove_local_expressions_from_table): New function + extracted from dom_opt_finalize_block. + (restore_vars_to_originalvalue): Likewise. + (extract_true_false_edges_from_block): Likewise. + (thread_across_edge): Handle if (cond) too. + (dom_opt_finalize_block): Use new functions. Handle if (cond). + + * tree-ssa-dom.c (thread_across_edge): Accept dom_walk argument. + Record temporary equivalences created by PHIs and temporarily + const/copy propagate into conditionals. + (dom_opt_finalize_block): Thread across an edge to a dominated block + if the dominated block has PHIs. Remove temporary equivalenecs + created by PHIs in thread_across_edge. Update code to restore the + various hash tables to use the actual varray rather than a local + copy of the varray. + (simplify_rhs_and_lookup_avail_expr): Set the condition's code + before settings its operands. + + * tree-ssa.c (create_temp): Use add_referenced_var rather than + an incomplete inline of its behavior. Also make sure to + set is_dereferenced_{load,store}, is_call_clobbered and is_stored. + + * tree-ssa-live.c (build_tree_conflict_graph): Correctly handle + case where the result of a PHI is unused. + +2004-01-15 Diego Novillo <dnovillo@redhat.com> + + * cfghooks.c (predicted_by_p): Add missing return. + +2004-01-15 Richard Henderson <rth@redhat.com> + + * tree-ssa-dom.c (optimize_stmt): Dump new statement if + folding succeeded. + +2004-01-15 Kazu Hirata <kazu@cs.umass.edu> + + * tree-cfg.c: Fix comment typos. + * tree-eh.c: Likewise. + * tree-inline.c: Likewise. + * tree-optimize.c: Likewise. + * tree-ssa.c: Likewise. + * tree-ssa-dom.c: Likewise. + * tree-ssa-operands.c: Likewise. + * tree-ssa-pre.c: Likewise. + * tree-tailcall.c: Likewise. + +2004-01-14 Jan Hubicka <jh@suse.cz> + + * basic-block.h: Include predict.h + (tree_predicted_by_p, rtl_predicted_by_p, rtl_predict_edge, + predict_edge_def): Declare. + * cfghooks.h (cfg_hooks): add predict_edge and predicted_by_p + (predict_edge, predicted_by_p): Declare. + * cfghooks.c (predict_edge, predicted_by_p): Declare. + * cfgrtl (rtl_cfg_hooks, cfg_layout_rtl_cfg_hook): Add new hooks. + * cse.c (struct cse_basic_block_data): Rename enum values to not + conflict with profile.h; update all uses. + * predict.c: Include tree-flow.h, ggc.h, tree-dump.h + (predicted_by_p): Rename to ... + (rtl_predicted_by_p): .. this one; make global + (tree_predicted_by_p): New. + (dump_prediction): Add FILE argument. + (predict_edge): Rename to ... + (rtl_predict_edge): .. this one. + (tree_predict_edge): New. + (combine_predictions_for_insn): Update calls of predict_edge. + (predict_loops): Break out from ... + (estimate_probability): ... here; update comments; move updating + of unknown probabilities from ... + (estimate_bb_frequencies): ... here. + (combine_predictions_for_bb): New. + (tree_predict_by_opcode): New. + (tree_estimate_probability): New. + * predict.def (PRED_TREE_POINTER, PRED_TREE_OPCODE_POSITIVE, + PRED_TREE_OPCODE_NONEQUAL, PRED_TREE_FPOPCODE): New predictors. + * predict.h: Add include guard. + (predict_edge, predict_edge_def): Move prototypes to basic_block.h + * tree-cfg.c (tree_cfg_hooks): Add prediction hooks. + * tree-dump.c (dump_files): Add profile. + * tree-flow.h (struct edge_prediction): New structure. + (struct bb_ann_d): Add field predictions. + (tree_estimate_probability): Declare. + * tree-optimize.c (optimize_function_tree): Call tree_estimate_probability. + * tree.h (tree_dump_index): Add TDI_profile. + * tree-pass.h (pass_profile): Declare. + +2004-01-14 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * basic-block.h (find_basic_blocks, cleanup_cfg, + delete_unreachable_blocks, merge_seq_blocks): Declare. + * cfgcleanup.c (merge_seq_blocks): New. + * output.h (find_basic_blocks, cleanup_cfg, delete_unreachable_blocks): + Declarations moved to basic-block.h. + * tree-cfg.c (tree_merge_blocks, tree_can_merge_blocks_p): New. + (cleanup_tree_cfg): Call merge_seq_blocks. + (tree_cfg_hooks): Add tree_can_merge_blocks_p and tree_merge_blocks. + +2004-01-14 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (tree_make_forwarder_block): Fix. + +2004-01-14 Richard Henderson <rth@redhat.com> + + * tree-complex.c: New file. + * Makefile.in (OBJS-common): Add it. + * tree-pass.h (pass_lower_complex): New. + * tree-optimize.c (init_tree_optimization_passes): Add it. + +2004-01-14 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * Makefile.in (tree-ssa-loop.o): Add cfgloop.h dependency. + (cfghooks.o): Add TIMEVAR_H and toplev.h dependency. + * basic-block.h (struct edge_def): Use ir_type instead testing of + cfg_hooks directly. + (tidy_fallthru_edge, tidy_fallthru_edges, dump_bb, verify_flow_info): + Declaration removed. + * cfg.c (verify_flow_info, dump_bb): Moved to cfghooks.c. + * cfgcleanup.c (try_simplify_condjump): Changed due to change of + tidy_fallthru_edge. + * cfghooks.c: Include timevar.h and toplev.h. + (cfg_hooks): Made static. + (tree_register_cfg_hooks, ir_type): New. + (verify_flow_info, dump_bb): Moved from cfg.c. + (redirect_edge_and_branch, redirect_edge_and_branch_force, + split_block, split_block_after_labels, move_block_after, + delete_basic_block, split_edge, create_basic_block, + create_empty_bb, can_merge_blocks_p, merge_blocks, + make_forwarder_block, tidy_fallthru_edge, tidy_fallthru_edges): New. + * cfghooks.h (struct cfg_hooks): Modified. + (redirect_edge_and_branch, redirect_edge_and_branch_force, split_block, + delete_basic_block, split_edge, create_basic_block, can_merge_blocks_p, + merge_blocks, make_forwarder_block): Changed into functions. + (loop_optimizer_init, loop_optimizer_finalize): Removed. + (HEADER_BLOCK, LATCH_EDGE): Moved into cfgloop.c. + (tidy_fallthru_edge, tidy_fallthru_edges, create_empty_bb, + verify_flow_info, dump_bb, ir_type): Declare. + (cfg_layout_rtl_cfg_hooks): Declare. + * cfglayout.c (copy_bbs): Don't call add_to_dominance_info. + * cfgloop.c (HEADER_BLOCK, LATCH_EDGE): Moved from cfghooks.h. + (update_latch_info, mfb_keep_just, mfb_keep_nonlatch): New functions. + (canonicalize_loop_headers): Use new semantics of make_forwarder_block. + * cfgloop.h (rtl_loop_optimizer_init, rtl_loop_optimizer_finalize): + Removed. + (loop_optimizer_init, loop_optimizer_finalize): Declare. + * cfgloopmanip.c (split_loop_bb): Don't update dominators. + (remove_bbs): Don't call remove_bbs. + (create_preheader): Use make_forwarder_block. + (mfb_keep_just, mfb_update_loops): New static functions. + * cfgrtl.c (cfg_layout_split_block, rtl_split_block, + rtl_make_forwarder_block, rtl_create_basic_block, + rtl_delete_block, rtl_split_block, rtl_merge_blocks, + tidy_fallthru_edge, rtl_split_edge, cfg_layout_merge_blocks, + cfg_layout_split_edge): Parts not specific to rtl moved to cfghooks.c + (tidy_fallthru_edges): Moved to cfghooks.c. + (rtl_move_block_after): New. + (redirect_edge_with_latch_update, update_cfg_after_block_merging): + Removed. + (rtl_cfg_hooks, cfg_layout_rtl_cfg_hooks): Modified. + * ifcvt.c (merge_if_block, find_cond_trap, find_if_case_1, + find_if_case_2): Don't update dominators. + * loop-init.c (rtl_loop_optimizer_init, rtl_loop_optimizer_finalize): + Replaced by rtl_loop_optimizer_init and rtl_loop_optimizer_finalize. + * loop-unswitch.c (unswitch_loop): Don't call add_to_dominance_info. + * toplev.c (rest_of_handle_loop2): Enter cfglayout mode here. + * tree-cfg.c (create_bb): Modified to suit create_basic_block hook. + (tree_redirect_edge_and_branch_1): Merged into + tree_redirect_edge_and_branch. + (create_blocks_annotations): Removed. + (tree_loop_optimizer_init, tree_loop_optimizer_finalize): Removed. + (tree_make_forwarder_block, remove_bb, tree_split_edge, + tree_redirect_edge_and_branch, tree_split_block, + tree_move_block_after): Partially moved to cfghooks.c. + (tree_duplicate_bb): New. + (PENDING_STMT): Moved to tree-flow.h. + (tree_register_cfg_hooks): Moved to cfghooks.c. + (build_tree_cfg): Don't call create_blocks_annotations. + (factor_computed_gotos, make_blocks): Use create_empty_bb. + (cleanup_tree_cfg): Use delete_unreachable_blocks. + (remove_unreachable_blocks, insert_bb_before): Removed. + (remove_phi_nodes_and_edges_for_unreachable_block): Modified. + (tree_find_edge_insert_loc, thread_jumps): Use cfg hooks. + (bsi_commit_edge_inserts): Update_annotations argument removed. + (tree_cfg_hooks): Modified. + * tree-flow.h (PENDING_STMT): Moved from tree-cfg.c. + (insert_bb_before, remove_unreachable_blocks, + remove_phi_nodes_and_edges_for_unreachable_block, tree_split_edge): + Declaration removed. + (bsi_commit_edge_inserts): Declaration changed. + (tree_duplicate_bb): Declare. + * tree-sra.c (scalarize_structures): Changed due to + bsi_commit_edge_inserts change. + * tree-ssa-dom.c (tree_ssa_dominator_optimize): Use + delete_unreachable_blocks. + * tree-ssa-loop.c: Include cfgloop.h. + * tree-ssa-pre.c (split_critical_edges, tree_perform_ssapre): Use cfg + hooks. + * tree-ssa.c (rewrite_trees, rewrite_vars_out_of_ssa): Changed due to + bsi_commit_edge_inserts change. + (ssa_redirect_edge): Record the phi arguments on the redirected edge. + * tree-tailcall.c (eliminate_tail_call): Clean stored phi arguments. + +2004-01-13 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_lhs_complex_part_expr): Remove. + (gimplify_modify_expr): Don't call it. + + * tree-alias-common.c (HAVE_BANSHEE): Make sure it's defined. + (pass_build_pta): Set name. + +2004-01-13 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-tailcall.c (eliminate_tail_call): Add phi nodes for the call + vdefs. + (find_tail_calls): Ignore returns with virtual operands. + +2004-01-12 Richard Henderson <rth@redhat.com> + + * tree-pass.h: New file. + * gimple-low.c: Include tree-pass.h. + (lower_function_body): Make static, take no arguments. Set + dont_emit_block_notes and call reset_block_changes here. + (pass_lower_cf): New. + * toplev.c (general_init): Call init_tree_optimization_passes. + * toplev.h (init_tree_optimization_passes): Declare. + * tree-alias-ander.c: Include tree-pass.h. + (tree_dump_file, tree_dump_flags): Remove. + (andersen_init): Don't dump_begin. + (andersen_cleanup): Don't dump_end. + * tree-alias-common.c: Include tree-pass.h, timevar.h. + (currptadecl): Remove. + (create_alias_vars): Make static, take no args. Tidy ifdefs. + (delete_alias_vars): Likewise. Protect vs PTA_ANDERSEN. + (pass_build_pta, pass_del_pta): New. + * tree-alias-common.h (create_alias_vars): Delete decl. + (delete_alias_vars): Likewise. + * tree-cfg.c: Include tree-pass.h. + (tree_dump_file, tree_dump_flags): Remove. + (build_tree_cfg): Don't timevar, do init_flow. Ensure one bb. + Don't dump the function here. + (execute_build_cfg, pass_build_cfg): New. + (remove_useless_stmts): Make static, take no arguments. + (pass_remove_useless_stmts): New. + (remove_bb): Don't open the dump file. + * tree-dfa.c: Include tree-pass.h. + (tree_dump_file, tree_dump_flags): Remove. + (find_referenced_vars): Make static, take no args. Do init_tree_ssa. + (compute_may_aliases): Similarly. Don't timevar or open dump file. + Don't delete_alias_vars here. + (pass_referenced_vars, pass_may_alias): New. + * tree-dump.c (dump_files): Remove optimization dumps. + (extra_dump_files, extra_dump_files_in_use): New. + (extra_dump_files_alloced): New. + (dump_register): New. + (get_dump_file_info): New. + (dump_begin, dump_enabled_p, dump_flag_name): Use it. + (dump_enable_all): Handle extra_dump_files. + (dump_switch_p_1): Split out from dump_switch_p. + (dump_switch_p): Handle extra_dump_files. + * tree-dump.h (dump_register): Declare. + * tree-eh.c: Include tree-pass.h + (lower_eh_constructs): Make static, take no args. Don't timevar, + don't dump function. + (pass_lower_eh): New. + * tree-flow.h (remove_useless_stmts, find_referenced_vars, + compute_may_aliases, lower_function_body, rewrite_out_of_ssa, + tree_ssa_ccp, tree_ssa_dominator_optimize, tree_ssa_dce, + tree_ssa_loop_opt, lower_eh_constructs, tree_sra): Remove. + (rewrite_into_ssa): Update decl. + * tree-mudflap.c: Include tree-pass.h. + (mudflap_function_decls): Make static, take no args, don't process + functions with mf_marked_p. + (mudflap_function_ops): Likewise. + (gate_mudflap, pass_mudflap_1, pass_mudflap_2): New. + (mudflap_enqueue_decl): Don't open dump file. + (mudflap_enqueue_constant): Likewise. + * tree-nomudflap.c: Include tree-pass.h. + (mudflap_c_function_decls, mudflap_c_function_ops): Remove. + (pass_mudflap_1, pass_mudflap_2): New. + * tree-optimize.c: Include tree-pass.h. + (optimize_function_tree): Remove. + (tree_dump_file, tree_dump_flags, vars_to_rename): New. + (all_passes): New. + (execute_gimple, pass_gimple): New. + (execute_rebuild_bind, pass_rebuild_bind): New. + (gate_all_optimizations, pass_all_optimizations): New. + (execute_del_cfg, pass_del_cfg): New. + (register_one_dump_file, register_dump_files): New. + (dup_pass_1, init_tree_optimization_passes): New. + (current_properties, last_verified): New. + (execute_todo, execute_one_pass, execute_pass_list): New. + (tree_rest_of_compilation): Remove -O0 passes. + * tree-sra.c: Include tree-pass.h, flags.h. + (tree_dump_file, tree_dump_flags, vars_to_rename): Remove. + (tree_sra): Make static, take no args. Don't timevar or dump file. + (gate_sra, pass_sra): New. + * tree-ssa-ccp.c: Include tree-pass.h, flags.h. + (tree_dump_file, tree_dump_flags): New. + (tree_ssa_ccp): Make static, take no args. Don't timevar or dump file. + (gate_ccp, pass_ccp): New. + (substitute_and_fold): Take no args. + * tree-ssa-dce.c: Include tree-pass.h, flags.h. + (tree_dump_file, tree_dump_flags): New. + (tree_ssa_dce): Make static, take no args. Don't open dump file. + (gate_dce, pass_dce): New. + * tree-ssa-dom.c: Include tree-pass.h, flags.h. + (tree_dump_file, tree_dump_flags, vars_to_rename): Remove. + (tree_ssa_dominator_optimize): Make static, take no args, don't + timevar, don't dump file. + (gate_dominator, pass_dominator): New. + * tree-ssa-loop.c: Include tree-pass.h, flags.h. + (tree_dump_file, tree_dump_flags): Remove. + (tree_ssa_loop_opt): Make static, take no args, don't open dump file. + (gate_loop, pass_loop): New. + * tree-ssa-pre.c: Include tree-pass.h, flags.h. + (tree_dump_file, tree_dump_flags): Remove. + (execute_pre): Rename from tree_perform_ssapre, make static, + take no args, don't timevar, don't open dump file, don't allocate + vars_to_rename. + (gate_pre, pass_pre): New. + * tree-ssa.c: Include tree-pass.h. + (tree_dump_file, tree_dump_flags, vars_to_rename): Remove. + (rewrite_into_ssa): Take no arguments, don't open dump file. + (rewrite_out_of_ssa): Make static, take no args, don't timevar, + don't open dump file. Disable TER if mudflap. + (pass_build_ssa, pass_del_ssa): New. + * tree-tailcall.c: Include tree-pass.h, flags.h. + (tree_dump_file, tree_dump_flags): Remove. + (tree_optimize_tail_calls_1): Rename from tree_optimize_tail_calls. + Make static, take only opt_tailcalls, don't dump file. + (execute_tail_recursion, gate_tail_calls, execute_tail_calls): New. + (pass_tail_recursion, pass_tail_calls): New. + * tree.h (enum tree_dump_index): Remove optimization dumps. + * Makefile.in (tree-alias-ander.o, tree-alias-common.o, tree-ssa.o, + tree-ssa-dom.o, tree-ssa-pre.o, tree-cfg.o, tree-tailcall.o, + tree-dfa.o, tree-eh.o, tree-ssa-loop.o, tree-optimize.o, gimple-low.o, + tree-mudflap.o, tree-ssa-dce.o, tree-ssa-ccp.o, tree-sra.o: Update + dependencies. + +2004-01-12 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_xform_derefs): Restore instrumentation of + RETURN_EXPRs. + +2004-01-11 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (remove_usless_stmts_cond): Fold statement. + (remove_useless_stmts_1): Fold trees we know how to fold. + +2004-01-09 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_constructor): Merge into ... + (gimplify_init_constructor): ... here. Handle COMPLEX_TYPE and + VECTOR_TYPE. + (gimplify_lhs_complex_part_expr): New. + (gimplify_modify_expr): Call it. + * tree-simple.c (is_gimple_rhs): Accept COMPLEX_EXPR. + * c-pretty-print.c (pp_c_initializer): Accept any type CONSTRUCTOR. + (pp_c_initializer_list): Fix code expectations for VECTOR_TYPE and + COMPLEX_TYPE. + +2004-01-09 Steven Bosscher <stevenb@suse.de> + + PR optimization/13599 + * tree-cfg.c (remove_useless_stmts_cond): Clear last-goto + before returning. + +2004-01-09 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_asm_expr): Fix ordering of ASM_INPUTS. + +2004-01-09 Jan Hubicka <jh@suse.cz> + + * cgraph.h (cgraph_clone_inlined_nodes): Declare. + * cgraphunit.c (cgrpah_clone_inlined_nodes): Make global. + (cgraph_mark_inline_edge): Sanity check that size is positive. + (cgraph_decide_inlining): Fix typo. + * tree-optimize.c (tree_rest_of_compilation): Fix node duplication + code. + +2004-01-09 Jan Hubicka <jh@suse.cz> + + * tree-inline.c (estimate_num_insns_1): Fix. + +2004-01-09 Richard Henderson <rth@redhat.com> + + * tree-alias-ander.c, tree-cfg.c, tree-dfa.c, tree-mudflap.c, + tree-sra.c, tree-ssa-ccp.c, tree-ssa-dce.c, tree-ssa-dom.c, + tree-ssa-loop.c, tree-ssa-pre.c, tree-ssa.c, tree-tailcall.c: Rename + dump_file and dump_flags to tree_dump_file/flags. + +2004-01-08 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_build_string): Properly mf_mark string. + (mf_varname_tree): Remove redundant marking. + * tree-optimize.c (tree_rest_of_compilation): Skip mudflap processing + of mf_marked functions. + * c-mudflap.c (mflang_flush_calls): mf_mark synthetic function. + +2004-01-07 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (OBJS-common): Remove tree-must-alias.o + (tree-must-alias.o): Remove. + * common.opt (ftree-must-alias): Remove. + * flags.h (flag_tree_must_alias): Remove. Update all users. + * timevar.def (TV_TREE_MUST_ALIAS): Remove. + * toplev.c (f_options): Remove entry for -ftree-must-alias. + * tree-alias-common.c (local_alias_vars): Add GTY marker. + (local_alias_varnums): Likewise. + * tree-dfa.c (aliases_computed_p): Declare. + (dump_variable): Show variable UID and dereferenced bits. + (compute_may_aliases): Add arguments 'vars_to_rename' and 'phase'. + Do not call create_alias_vars. + Call promote_call_clobbered_vars + Do debugging dumps. + Set 'aliases_computed_p' to true before returning. + (create_memory_tags): Call may_be_aliased. + Mark new memory tags for renaming. + (compute_alias_sets): Don't do debugging dumps. + (find_variable_in): Move from tree-must-alias.c + (remove_element_from): Likewise. + (find_addressable_vars): Likewise + (promote_call_clobbered_vars): New. + (get_memory_tag_for): Mark the tag volatile if the pointed-to type + is volatile. + * tree-dump.c (dump_files): Remove entry for tree-mustalias. + Add entries for tree-ssa7, tree-dom3 and tree-dce3. + * tree-flow-inline.h (may_be_aliased): New. + * tree-flow.h (may_be_aliased): Declare. + (aliases_computed_p): Declare. + (tree_compute_must_alias): Remove. + * tree-must-alias.c: Remove. + * tree-optimize.c: Include tree-alias-common.h. + (optimize_function_tree): Call create_alias_vars before going into + SSA form. + Do not compute aliases until after the first DOM and DCE passes. + Run DOM and DCE once more after computing may-aliases. + * tree-ssa-dom.c (propagate_copy): Merge the dereferenced bit flags + when copy propagating pointers. + * tree-ssa-operands.c (get_stmt_operands): Assume that the + statement has no volatile operands. + (get_expr_operands): When processing an INDIRECT_REF expressions, + mark the statement as having volatile operands if aliases have not + been computed. + (add_stmt_operand): If the variable may be aliased and aliasing has + not been computed yet, mark the statement as having volatile + operands. + * tree-ssa.c (init_tree_ssa): Set aliases_computed_p to false. + (delete_tree_ssa): Likewise. + * tree.h (tree_dump_index): Remove TDI_mustalias. + Add TDI_dom_3, TDI_ssa_7 and TDI_dce_3. + * doc/invoke.texi: Remove must-alias documentation. + +2004-01-07 Jeff Law <law@redhat.com> + + * tree-ssa-dce.c (find_useful_stmts): Do not consider PHIs for + virtual operands inherently necessary. + +2004-01-07 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-dfa.c (free_df_for_stmt, free_df): New functions. + (compute_immediate_uses_for_stmt): Record uses in VDEFs. + * tree-flow.h (free_df, kill_redundant_phi_nodes): Declare. + * tree-optimize.c (optimize_function_tree): Call + kill_redundant_phi_nodes. + * tree-ssa-ccp.c (finalize): Call free_df. + * tree-ssa.c (replace_immediate_uses, raise_value, + kill_redundant_phi_nodes): New functions. + +2004-01-06 Jeff Law <law@redhat.com> + + * tree.h (FUNCTION_RECEIVES_NONLOCAL_GOTO): Kill. + * tree-cfg.c (make_exit_edges, is_ctrl_altering_stmt): Use + current_function_has_nonlocal_label instead of + FUNCTION_RECEIVES_NONLOCAL_GOTO. + * gimplify.c (gimplify_expr): Set has_nonlocal_label in the + appropriate function's struct function rather than setting + a bit in the FUNCTION_DECL. + +2004-01-06 Jan Hubicka <jh@suse.cz> + + * expr.c (string_constant): Recognize array_ref. + +2004-01-06 Richard Henderson <rth@redhat.com> + + * builtins.c (builtin_save_expr): New. + (expand_builtin_mathfn, expand_builtin_mathfn_2, + expand_builtin_strcmp, expand_builtin_strncmp, + expand_builtin_strcat, fold_builtin_cabs): Use it. + +2004-01-06 Jan Hubicka <jh@suse.cz> + + * fold-const.c (fold): Do not rebuild comparison when nothing + changed. + +2004-01-05 Jan Hubicka <jh@suse.cz> + + * tree-ssa-ccp.c (ccp_fold_builtin): Return early for builtins + taking no arugment. + +2004-01-05 Steven Bosscher <steven@gcc.gnu.org> + + * tree-ssa-dce.c: Clean up whitespace. + + * tree-cfg.c (tree_verify_flow_info): Fix complaint about + missing or wrong labels in the targets of a conditional branch. + +2004-01-05 Richard Henderson <rth@redhat.com> + + * tree-ssa-dom.c (record_equivalences_from_incoming_edge): Check + for signed zeros before recording value. + * Makefile.in (tree-ssa-dom.o): Depend on real.h. + +2004-01-05 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (cprop_into_stmt): Remove hack which prevented + copy propagation into statements with virtual operands, but no + real operands. + + * tree-ssa-dom.c (tree_ssa_dominator_optimize): Correctly handle + the case where an edge we wish to redirect is split by the out of SSA + code. + +2004-01-05 Richard Henderson <rth@redhat.com> + + * c-tree.h (struct lang_type): Add enum_min, enum_max. + * c-decl.c (finish_enum): Set them. Set TYPE_MIN/MAX_VALUE to + the limits of the compatible type, not to the enumerators. + (check_bitfield_type_and_width): Use them. + (finish_struct): Clear allocated struct lang_type. + * gimplify.c (gimplify_switch_expr): Remove special handling of + outer cast in a switch. + * tree-ssa-dom.c (record_equivalences_from_incoming_edge): Likewise. + +2004-01-05 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (added_phis): Removed. + Remove gt-tree-ssa-pre.h. + (process_left_occs_and_kills): ASM_EXPR's block load pre. + + * Makefile.in (GTFILES): Don't process tree-ssa-pre.c. + gt-tree-ssa-pre.h isn't a gtfile anymore. + +2004-01-05 Andrew Pinski <pinskia@physics.uc.edu> + + * config.gcc (powerpc-*-darwin*): Make libbanshee rebuild + on PPC darwin. + +2004-01-05 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_expr): Move check for error_mark inside + the main loop. + +2004-01-04 Jan Hubicka <jh@suse.cz> + + * Makefile.in (cgraph.o, cgraphunit.o): Add intl.h dependency. + * cgraph.c (create_edge, dump_cgraph): Update to use inline_failed + * cgraph.h (cgraph_edge): Replace inline_call by inline_failed + (cgraph_inline_p): Add extra argument reason. + * cgraphunit.c: Minor formating fixes. + cgraph_first_inlined_callee): New functions. + (record_call_1): Record builtins too. + (cgraph_analyze_function): Update inline_failed messages. + (cgraph_mark_functions_to_output, cgraph_expand_function, cgraph_inlined_into, + cgraph_inlined_callees, cgraph_estimate_growth): Update to use inline_failed. + (cgraph_check_inline_limits): Likewise; Add argument reason. + (cgraph_set_inline_failed): New static function. + (cgraph_decide_inlining_of_small_function, cgraph_decide_inlining): Set + reasons. + (cgraph_inline_p): Add new argument reason. + * tree-inline.c (expand_call_inline): Update warning. + +2004-01-04 Andreas Jaeger <aj@suse.de> + + * common.opt: Re-order some options in ASCII collating orders. + +2004-01-03 Richard Henderson <rth@redhat.com> + + * toplev.c (rest_of_compilation): Fixup merge error wrt + check_function_return_warnings. + + * tree.h (FUNCTION_RECEIVES_NONLOCAL_GOTO): Use unsigned_flag. + +2004-01-02 Jan Hubicka <jh@suse.cz> + + * c-decl.c (duplicate_decls): Output DIE of extern inline function + only when it can be inlined. + * c-objc-common.c (c_disregard_inline_limits): When not inlining + extern inline functions do not disregard. + * cgraphunit.c (cgraph_analyze_function): When not inlining do not set + inline. + (cgraph_decide_inlining): Limit work done when not inlining. + (cgrpah_decide_inlining_incrementally): Likewise. + * tree-optimize.c (tree_rest_of_compilation): Do not call + optimize_inline_calls + when there is nothing to inline. + +2004-01-01 Richard Henderson <rth@redhat.com> + + * c-common.c (c_expand_expr): Don't handle STMT_EXPR. + * c-objc-common.c (c_objc_common_finish_file): Use expand_expr. + * c-semantics.c (lang_expand_stmt, lang_expand_decl_stmt, + expand_cond, genrtl_do_pushlevel, genrtl_goto_stmt, genrtl_expr_stmt, + genrtl_expr_stmt_value, genrtl_decl_stmt, genrtl_if_stmt, + genrtl_while_stmt, genrtl_do_stmt_1, genrtl_do_stmt, + genrtl_return_stmt, genrtl_for_stmt, genrtl_break_stmt, + genrtl_continue_stmt, genrtl_scope_stmt, genrtl_switch_stmt, + genrtl_case_label, genrtl_compound_stmt, genrtl_asm_stmt, + genrtl_cleanup_stmt, expand_stmt, find_reachable_label, + find_reachable_label_1, expand_unreachable_if_stmt, + expand_unreachable_stmt): Remove. + * c-common.h: Update. + +2003-12-31 Richard Henderson <rth@redhat.com> + + * c-mudflap.c (mflang_register_call): Remove. + (mflang_flush_calls): Use start_function/finish_function. + * tree-mudflap.c (mf_init_extern_trees): Tidy. + (mf_decl_cache_locals): Fix chaining for empty body. + (deferred_static_decl_labels): Remove. + (deferred_static_decls_init): Remove. + (mudflap_register_call): New. + (mudflap_enqueue_decl): Use it. Remove label argument. + (mudflap_enqueue_constant): Likewise. + (mudflap_finish_file): Update to match. + * tree-mudflap.h (mudflap_enqueue_decl): Remove label argument. + (mudflap_enqueue_constant): Likewise. + (mflang_register_call): Remove. + * tree-nomudflap.c (mudflap_enqueue_decl): Remove label argument. + (mudflap_enqueue_constant): Likewise. + * tree-optimize.c (tree_ssa_finish): Don't create NULL bodies. + * varasm.c (make_decl_rtl): Update mudflap_enqueue_decl call. + (output_constant_def_contents): Similarly for mudflap_enqueue_constant. + +2003-12-26 Sebastian Pop <s.pop@laposte.net> + + * tree-cfg.c (print_loop, print_pred_bbs, print_succ_bbs, + debug_loop_ir, print_loop_ir): New. + * tree-flow.h (debug_loop_ir, print_loop_ir): Declare. + +2003-12-23 Jeff Law <law@redhat.com> + + * tree-cfg.c (tree_find_edge_insert_loc): Do not use the target + block as an insertion location if the target block has PHI nodes. + +2003-12-23 Jan Hubicka <jh@suse.cz> + + * cgraphunit.c (cgraph_mark_inline): Accept argument edge; return + next edge not redirected. + (cgraph_recursive_inlining_p): Simplify. + (cgraph_decide_inlining*): Update calls of cgraph_mark_inline. + +2003-12-22 Toon Moene <toon@moene.indiv.nluug.nl> + + * tree-alias-common.c (find_func_aliases): Do not call + intra_function_call for languages assuring no aliasing between + arguments (by themselves) and global memory. + +2003-12-21 Jan Hubicka <jh@suse.cz> + + * tree-ssa-ccp.c (fold_stmt): Return when there is no RHS + (get_rhs): Return for RETURN_EXPR with no operand. + +2003-12-21 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (tree_make_forwarder_block): Use split_block. + (tree_split_block): New. + (tree_cfg_hooks): Add tree_split_block. + (tree_loop_optimizer_init): Enable force_single_succ_latches. + * cfgloopmanip.c (loop_split_edge_with): Don't update dominators. + * cfgrtl.c (rtl_split_edge, cfg_layout_split_edge): Update dominators. + +2003-12-19 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (alias_stats_d): New structure. + (alias_stats): New variable. + (create_memory_tags): Zero out alias_stats. + (dump_alias_stats): New function. + (compute_alias_sets): Call it if TDF_STATS is set. + (may_alias_p): Collect the various statistics. + +2003-12-19 Diego Novillo <dnovillo@redhat.com> + + * gimple-low.c (expand_var_p): Always expand volatiles. + * tree-dfa.c (find_referenced_vars): Move up in the file. + (create_memory_tags): New local function. + (compute_may_aliases): Call it. + (add_referenced_var): Move code to create memory tags and create + aliasing arrays to create_memory_tags. + (get_memory_tag_for): Don't mark memory tags volatile. Mark them + addressable. + * tree-flow.h (var_ann_d): Add bitfields is_dereferenced_store and + is_dereferenced_load. + (add_call_clobbered_var): Remove. + * tree-ssa-operands.c (check_optype_freelist): Mark arguments + unused. + (add_optype_freelist): Likewise. + (add_stmt_operand): Don't add operands for volatile variables. + +2003-12-19 Kazu Hirata <kazu@cs.umass.edu> + + * dominance.c: Fix comment typos. + * et-forest.c: Likewise. + * et-forest.h: Likewise. + * tree-cfg.c: Likewise. + * tree-eh.c: Likewise. + * tree-mudflap.c: Likewise. + * tree-optimize.c: Likewise. + * tree-pretty-print.c: Likewise. + * tree-ssa-ccp.c: Likewise. + * tree-ssa-dom.c: Likewise. + * tree-ssa.c: Likewise. + * tree-tailcall.c: Likewise. + * tree.def: Likewise. + * tree.h: Likewise. + +2003-12-18 Jason Merrill <jason@redhat.com> + + PR c++/12453 + * c-simplify.c (stmt_expr_last_stmt): Split out from... + (gimplify_stmt_expr): Here. + * c-common.h: Declare it. + +2003-12-18 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * et-forest.h (et_forest_create, et_forest_delete, + et_forest_add_node, et_forest_add_edge, et_forest_remove_node, + et_forest_remove_edge, et_forest_parent, + et_forest_common_ancestor, et_forest_node_value, + et_forest_enumerate_sons): Declarations removed. + (struct et_node): New. + (et_new_tree, et_free_tree, et_set_father, et_split, et_nca, + et_below): Declare. + * et-forest.c (struct et_forest_occurrence, struct et_forest, + struct et_forest_node): Removed. + (et_forest_create, et_forest_delete, + et_forest_add_node, et_forest_add_edge, et_forest_remove_node, + et_forest_remove_edge, et_forest_parent, + et_forest_common_ancestor, et_forest_node_value, + et_forest_enumerate_sons, splay, remove_all_occurrences, + find_leftmost_node, find_rightmost_node, calculate_value): Removed. + (struct et_occ): New. + (et_nodes, et_occurences): New. + (set_depth, set_depth_add, set_prev, set_next, et_recomp_min, + et_check_occ_sanity, et_check_sanity, et_check_tree_sanity, + record_path_before_1, record_path_before, check_path_after_1, + check_path_after, et_splay, et_new_occ, et_new_tree, + et_free_tree, et_set_father, et_split, et_nca, et_below): New. + * basic-block.h (struct basic_block_def): New field dom. + (struct dominance_info): Type removed. + (calculate_dominance_info, free_dominance_info, + nearest_common_dominator, set_immediate_dominator, + get_immediate_dominator, dominated_by_p, get_dominated_by, + add_to_dominance_info, delete_from_dominance_info, + recount_dominator, redirect_immediate_dominators, + iterate_fix_dominators, verify_dominators): Declarations + changed. + (enum dom_state): New. + (dom_computed): New variable. + (first_dom_son, next_dom_son): Declare. + * dominance.c (struct dominance_info): Removed. + (BB_NODE, SET_BB_NODE): Removed. + (calculate_dominance_info, free_dominance_info, + nearest_common_dominator, set_immediate_dominator, + get_immediate_dominator, dominated_by_p, get_dominated_by, + add_to_dominance_info, delete_from_dominance_info, + recount_dominator, redirect_immediate_dominators, + iterate_fix_dominators, verify_dominators, + debug_dominance_info): Work over new datastructure. Access + dominance datastructures through CFG. + (assign_dfs_numbers, compute_dom_fast_query, first_dom_son, + next_dom_son): New. + * tree-cfg.c (pdom_info): Variable removed. + (create_bb): Add the block to the dominance information. + (cleanup_tree_cfg): Let updating of the dominance on the + individual passes. + (remove_bb): Don't handle pdom. + (cleanup_control_expr_graph, tree_make_forwarder_block, + thread_jumps): Invalidate the dominators. + (tree_split_edge): Update the dominators. + (compute_dominance_frontiers_1, compute_dominance_frontiers, + tree_verify_flow_info, tree_loop_optimizer_init): Use the new + interface to dominators. + * domwalk.c (walk_dominator_tree): Do not use dom_children. + * tree-flow-inline.h (add_dom_child, remove_dom_child, + clear_dom_children, dom_children): Removed. + * tree-flow.h (struct bb_ann_d): Dom_children field removed. + (add_dom_child, dom_children, build_dominator_tree): Declaration + removed. + (compute_dominance_frontiers): Declaration changed. + * tree-optimize.c (optimize_function_tree): Free dominance + information in the end. + * tree-ssa-dom.c (tree_ssa_dominator_optimize, + dom_opt_finalize_block): Do not use dom_children. + * tree-ssa-pre.c (fast_a_dominates_b, build_dfs_id_array_1, + build_dfs_id_array): Removed. + (pre_idom, dfs_id, dfs_id_last): Variables removed. + (build_dfn_array): Do not use dom_children. + (eref_compare, load_modified_phi_result, rename_1, reaching_def, + finalize_1, collect_expressions, tree_perform_ssapre): Use the + new interface to the dominance information. + * tree-ssa.c (struct mark_def_sites_global_data): Idom field + removed. + (set_livein_block, verify_use, verify_phi_args, + rewrite_into_ssa, mark_def_sites, verify_ssa): Use the new + interface to the dominance information. + (build_dominator_tree): Removed. + * tree-tailcall.c (tree_optimize_tail_calls): Invalidate + dominance information. + * bt-load.c (dom): Variable removed. + (augment_live_range, combine_btr_defs, migrate_btr_def, + migrate_btr_defs, branch_target_load_optimize): Updated for the + new interface for dominance information. + * cfglayout.c (copy_bbs): Removed loops argument. Updated for + the new interface for dominance information. + * cfglayout.h (copy_bbs): Declaration changed. + * cfgloop.c (flow_loop_pre_header_find, flow_loops_cfg_dump, + flow_loop_scan, canonicalize_loop_headers, flow_loops_find): Updated + for the new interface for dominance information. + (flow_loop_scan): Loops argument removed. + (flow_loops_free): Don't release dominators. + * cfgloop.h (struct cfg): Dom field removed. + (flow_loop_scan, loop_split_edge_with, simple_loop_p, + just_once_each_iteration_p, split_loop_bb): Declaration changed. + * cfgloopanal.c (simple_loop_exit_p, simple_increment, + just_once_each_iteration_p, simple_loop_p): Remove loops argument. + Updated for the new interface for dominance information. + * cfgloopmanip.c (remove_bbs, find_path, create_preheader, + split_loop_bb, loopify, duplicate_loop_to_header_edge, + force_single_succ_latches, loop_split_edge_with): Ditto. + (create_loop_notes): Free the dominators. + * gcse.c (dominators): Variable removed. + (free_code_hoist_mem, compute_code_hoist_data, hoist_code): + Updated for the new interface for dominance information. + * ifcvt.c (post_dominators): Variable removed. + (mark_loop_exit_edges, merge_if_block, find_if_header, + find_cond_trap, find_if_case_1, find_if_case_2, if_convert): + Updated for the new interface for dominance information. + * loop-init.c (rtl_loop_optimizer_init, + rtl_loop_optimizer_finalize): Ditto. + * loop-unroll.c (decide_peel_simple, decide_peel_once_rolling, + decide_peel_completely, decide_unroll_stupid, + decide_unroll_constant_iterations, + decide_unroll_runtime_iterations): Loops argument removed. + Updated for the new interface for dominance information. + (unroll_and_peel_loops, peel_loops_completely, + unroll_loop_runtime_iterations): Updated for the new interface for + dominance information. + * loop-unswitch.c (may_unswitch_on_p, unswitch_loops, + unswitch_single_loop, unswitch_loop): Updated for the new + interface for dominance information. + * predict.c (process_note_predictions, process_note_prediction, + estimate_probability, note_prediction_to_br_prob): Ditto. + * sched-rgn.c (find_rgns, init_regions): Ditto. + * toplev.c (rest_of_handle_branch_prob): Free the dominators. + +2003-12-18 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (edges_to_redirect, redirection_targets): Merged + into a single varray "redirection_edges". + (tree_ssa_dominator_optimize): Twiddle initialization, finalization + and accessors to redirection information based on combining varrays. + Get the threading destination from the saved edge rather than from a + saved block. Mark variables appearing in PHIs at the jump thread + destination to be taken out of SSA form. + (thread_across_edge): Save the edge into the destination block + rather than the destination block itself. Twiddle based on + combining varrays of jump threading information. + * tree-flow.h (tree_block_forwards_to): Returns an edge rather than + a block. + * tree-cfg.c (tree_block_forwards_to): Return the edge leading to + the target block rather than the target block itself. + +2003-12-18 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (get_memory_tag_for): Don't put things with different + points-to sets in the same memory tag. + +2003-12-18 Jan Hubicka <jh@suse.cz> + + * c-common.c (handle_nonnull_attribute, check_function_nonnull): + Initialize arg_num. + * c-format.c (handle_format_attribute): Initialize format_num. + * rtlanal.c (get_related_value): Initialize get_jump_table_offset + +2003-12-18 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * stmt.c (expand_start_loop, expand_loop_continue_here, + expand_end_loop): Don't create loop notes. + +2003-12-18 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + Jeff Law <law@redhat.com> + + * tree-cfg.c (tree_node_shared_p): Explicitly allow sharing of + CST nodes. + * tree-simple.c (is_gimple_rhs): Allow CST nodes. + (is_gimple_min_invariant): Reject constants with TREE_OVERFLOW set. + * tree-ssa-ccp (visit_assignment): Test is_gimple_min_invariant + after munging bitfields. + * tree-ssa-dom.c (record_equivalences_from_stmt): Similarly. + +2003-12-17 Jan Hubicka <jh@suse.cz> + + Based on patch by Dale Johannesen + * expr.c (MOVE_RATIO, CLEAR_RATIO): Move to ... + * expr.h (MOVE_RATIO, CLEAR_RATIO): ... here + +2003-12-17 Jan Hubicka <jh@suse.cz> + + * Makefile.in (sibcall.o): Kill. + (tree-tailcall.o): Add except.h dependency + * sibcall.c: Kill. + (purge_reg_equiv_notes, purge_mem_unchanging_flag): Move to ... + * calls.c (purge_reg_equiv_notes, purge_mem_unchanging_flag) ... here. + (expand_call): Do not produce placeholders; do not deal with tail + recursion; set tail_call_emit. + (fixup_tail_calls): New. + * expr.h (fixup_tail_calls): Declare. + * toplev.c (rest_of_handle_sibling_calls): Kill. + (rest_of_compialtion): Do not use rest_of_handle_sibling_calls; + call fixup_tail_calls. + * tree-dump.c (dump_files): Add tail2 + * tree-flow.h (tree_optimize_tail_calls): Update prototype. + * tree-optimize.c (optimize_function_tree): Do tail optimization twice. + * tree-tailcall.c: Inlucde except.h + (suitable_for_tail_call_opt_p): New. + (optimize_tail_call): Add opt_tailcalls argument; optimize tailcalls. + (tree_optimize_tail_calls): Add opt_tailcalls/pass arguments. + * tree.h (CALL_EXPR_TAILCALL): New. + (tree_dump_index): Add tail2 + * function.h (struct function): Add tail_call_emit field. + +2003-12-17 Jan Hubicka <jh@suse.cz> + + * tree-inline.c (estimate_num_insns_1): Check that all nodes are + known; add missing nodes; fix MODIFY_EXPR + +2003-12-16 Jason Merrill <jason@redhat.com> + + PR middle-end/12920 + * stor-layout.c (layout_type): Just return if type is + error_mark_node. + * c-decl.c (grokdeclarator): Immediately layout an + ARRAY_TYPE used in a pointer-to-array declarator. + +2003-12-16 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (may_alias_p): If VAR and PTR are pointers with the + same alias set, return false. + (get_memory_tag_for): Group based on alias set classes, not on + conflicting alias sets. + * tree-must-alias.c (promote_var): Don't bring aliases over when + all the may-aliases of a non-promotable variable are promoted. + +2003-12-16 Andrew MacLeod <amacleod@redhat.com> + + * tree-flow-inline.h (free_vuse, free_vdefs): Moved to + tree-ssa-operands.c + (get_def_ops, get_use_ops, get_vdef_ops, get_vuse_ops): Use the new + more direct structure pointer. + (get_use_op_ptr, get_def_op_ptr): Cast is no longer necessary. + * tree-flow.h (struct stmt_ann_d): Replace operands and voperands + pointers with pointers directly to the operand types. + * tree-ssa-dom.c (cprop_into_stmt): Use new stmt based interface to + free virtual operands. Check virtual bases of both VUSE and VDEF. + * tree-ssa-operands.c (struct voperands_d): Declare here, used only + for previous_vops during stmt operand construction. + (struct vecmanage_d, vecmanage_add_segmen, vecmanage_add_special, + vecmanage_init, vecmanage_tree_ptr_init, vecmanage_fini, check_free, + vecmanage_new_vector, vecmanage_new_tree_ptr_vector, + vecmanage_free_vector): Remove. + (allocate_ssa_op_vec, free_ssa_op_vec, allocate_ssa_virtual_op_vec, + allocate_operands_t, allocate_voperands_t): Remove. + (finalize_new_ssa_operands, inalize_new_ssa_virtual_operand): Remove. + (struct freelist_d): New. List of free operand structures. + (check_optype_freelist): New. Choose memory from freelist, if available. + (add_optype_freelist): New. Add structure to freelist, if appropriate. + (allocate_def_optype): New. Allocate a def operand list from GC. + (allocate_use_optype): New. Allocate a useoperand list from GC. + (allocate_vdef_optype): New. Allocate a vdef operand list from GC. + (allocate_vuse_optype): New. Allocate a vuse operand list from GC. + (free_uses, free_defs, free_vuses, free_vdefs): Use GC and the freelist. + (remove_vuses, remove_vdefs): New. External interface to remove virtual + operands. + (init_ssa_operands, fini_ssa_operands): Ensure the free list is empty. + (finalize_ssa_defs, finalize_ssa_use, finalize_ssa_vdefs, + finalize_ssa_vuses): Use new direct pointers from the stmt annotation. + (append_vdef, append_vuse): No need to hack prev_vops pointer now. + (get_stmt_operands): use new freeing interface, keep previous vops in + their own local structure for now, passing its address around. + * tree-ssa-operands.h (struct def_optype_d, struct use_optype_d, + struct vdef_optype_d, struct vuse_optype_d): Implement as a single + dynamically allocated structure. + (struct operands_d, struct operands_d): Remove. + * tree-ssa-pre.c (subst_phis): Remove virtual operands using new funcs. + +2003-12-16 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (verify_addr_expr): Rename to .... + (verify_expr): ... this one; check that no SSA names are on + freelist. + (verify_stmt, verify_stmts): Update calls of verify_addr_expr. + + Revert until initializers are made language independent: + * cgraphunit.c (record_call_1): Do not call analyze_expr hook + * langhooks-def.h (LANG_HOOKS_CALLGRAPH_ANALYZE_EXPR): Kill. + (LANG_HOOKS_CALLGRAPH_INITIALIZER): Update. + * longhooks.h (lang_hooks_for_callgraph): Kill analyze_expr. + +2003-12-16 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-pretty-print.c (dump_bb_header): Show block number when + there is no label. + (pp_cfg_jump): Show labels in addition to block numbers. + (dump_generic_bb_buff): Always call dump_bb_header. + +2003-12-16 Jan Hubicka <jh@suse.cz> + + * cgraphunit.c (cgraph_remove_unreachable_nodes): Fix typo; + improve comments; cleanup linked list mantenance. + +2003-12-15 Diego Novillo <dnovillo@redhat.com> + + * tree-sra.c (can_be_scalarized_p): Reject volatile variables. + + * sibcall.c (skip_copy_to_return_value): Initialize 'hardret' and + 'softret'. + +2003-12-16 Jan Hubicka <jh@suse.cz> + + * cgraph.c (cgraph_remove_node): Ignore DECL_EXTERNAL clones. + * cgraphunit.c (verify_cgraph_node): Do not insist on unemmited extern + inline functions to be valid. + (cgraph_finalize_compilation_unit): Fix ordering. + (cgraph_mark_functions_to_output): Do not insist on DECL_EXTERNAL + nodes to be reclaimed. + (cgraph_remove_unreachable_nodes): New function. + (cgraph_decide_inlining): use it. + +2003-12-15 Andrew MacLeod <amacleod@redhat.com> + + * Makefile.in (TREE_FLOW_H): Add dependence on tree-ssa-operands.h + (OBJS-common): Add tree-ssa-operands.o + (tree-ssa-operands.o): Add dependencies. + (GTFILES): Add tree-ssa-operands.[ch]. + * tree-dfa.c (get_stmt_operands, get_expr_operands, add_stmt_operand, + note_addressable, add_def, add_use, add_vde, add_vuse, + add_call_clobber_ops, add_call_read_ops): Moved to tree-ssa-operands.c. + (compute_immediate_uses_for_stmt): Use new optypes interface. + (cleanup_operand_arrays): Delete. + (collect_dfa_stats_r): Use new optypes interface. + (get_call_flags): Moved to tree-ssa-operands.c. + (vdefs_disappeared_p, mark_new_vars_to_rename): Use optypes interface. + * tree-flow-inline.h (def_ops, use_ops, vdef_ops, vuse_ops): Use new + optypes. + (free_vuses): New. Clear and release vuses. + (free_vdefs): New. Clear and release vdefs. + (get_use_ops_ptr): New. Get address of a use op. + (get_def_ops_ptr): New. Get address of a use op. + (get_vdef_result_ptr): New. Get address of a use op. + (get_vdef_op_ptr): New. Get address of a use op. + (get_vuse_op_ptr): New. Get address of a use op. + (start_ssa_stmt_operands): New. Entry point to start processing stmt + operands. + * tree-flow.h (struct operands_d, struct voperands_d): Move to + tree-ssa-operands.h + (struct stmt_ann_d): Add GTY markers to operands. + * tree-pretty-print.c (dump_vops): Use optypes interface. + * tree-sra.c (create_scalar_copies): Use optypes interface. + (scalarize_structures, scalarize_modify_exp): Use optypes interface. + * tree-ssa-ccp.c (visit_stmt, ccp_fold, initialize, replace_uses_in, + likely_value, set_rhs): Use optypes interface. + * tree-ssa-dce.c (find_useful_stmts, stmt_useful_p, process_worklist): + Use optypes interface. + * tree-ssa-dom.c (thread_across_edge, thread_jumps_walk_stmts): Use + optypes interface. + (cprop_into_stmt): Rewrite using new interface. + (eliminate_redundant_computations, record_equivalences_from_stmt, + optimize_stmt, avail_expr_hash, avail_expr_eq): Use optypes interface. + * tree-ssa-live.c (create_ssa_var_map, calculate_live_on_entry, + build_tree_conflict_graph,register_ssa_partitions_for_vars): Use + optypes interface. + * tree-ssa-pre.c (names_match_p, maybe_find_rhs_use_for_var, + expr_phi_insertion, same_e_version_real_occ_real_occ, opnum_of_phi, + generate_expr_as_of_bb, generate_vops_as_of_bb, subst_phis, + load_modified_real_occ_real_occ, same_e_version_phi_result, can_insert, + get_default_def, reaching_def, process_left_occs_and_kills, + collect_expressions): Use optypes interface. + * tree-ssa.c (mark_def_sites, check_replaceable, find_replaceable_in_bb, + dump_replaceable_exprs, rewrite_trees, verify_ssa, rewrite_stmt): Use + optypes interface. + (init_tree_ssa): Initialize new operand data structures. + (delete_tree_ssa): Free new operand structures. + * tree.h (VDEF_RESULT, VDEF_OP, NUM_VDEFS): Move to tree-ssa-operands.h. + + * tree-ssa-operands.h: New file. + (struct def_optype_d): New. Structure for stmt defs. + (struct use_optype_d): New. Structure for stmt uses. + (struct vdef_optype_d): New. Structure for stmt vdefs. + (struct vuse_optype_d): New. Structure for stmt vuses. + (USE_OPS, STMT_USE_OPS, NUM_USES, USE_OP_PTR, USE_OP): Macros to + access stmt uses. + (DEF_OPS, STMT_DEF_OPS, NUM_DEFS, DEF_OP_PTR, DEF_OP): Macros to + access stmt defs. + (VDEF_OPS, STMT_VDEF_OPS, NUM_VDEFS, VDEF_RESULT_PTR, VDEF_RESULT, + VDEF_OP_PTR, VDEF_OP): Macros to access stmt vdefs. + (VUSE_OPS, STMT_VUSE_OPS, NUM_VUSES, VUSE_OP_PTR, VUSE_OP): Macros to + access stmt vuses. + (struct operands_d, struct voperands_d): moved from tree-dfa.c. + * tree-ssa-operands.c: New file. + (build_defs, build_uses, build_vdefs, build_vuses): New static varrays. + (struct vecmanage_d): New. Struct to manage non-GC vectors. + (vecmanage_add_segment): New. Add a new segment to a vector manager. + (vecmanage_add_special): New. Add a large vector to the special list. + (vecmanage_init): Initialize a vector manager. + (vecmanage_tree_ptr_init): New. Initialize a vector manager for tree *. + (vecmanage_fini): New. Release vector manager memory. + (check_free): New. Look for free memory in the vector maanger. + (vecmanage_new_vector): New. Allocate a vector. + (vecmanage_new_tree_ptr_vector): New. Allocate a vector of 'tree *'. + (vecmanage_free_vector): New. Free a vector. + (free_ssa_op_vec): New. Free an ssa operand's memory. + (allocate_ssa_op_vec): New. Allocate a vector for use/defs. + (allocate_ssa_virtual_op_vec): New. Allocate a vector for vuse/vdefs. + (allocate_operands_t): New. Allocate an operand structure. + (allocate_voperands_t): New. Allocate a virtual operand structure. + (free_uses): New. Clear and release uses. + (free_defs): New. Clear and release defs. + (init_ssa_operands): New. Initialize ssa operand management. + (fini_ssa_operands): New. Cleanup ssa operand management. + (finalize_new_ssa_operands): New. Commit current operands. + (finalize_new_ssa_virtual_operands): New. Commit current virtual ops. + (finalize_ssa_defs): New. Commit and verify stmt definitions. + (finalize_ssa_uses): New. Commit and verify stmt uses. + (finalize_ssa_vdefs): New. Commit and verify stmt virtual definitions. + (finalize_ssa_vuses): New. Commit and verify stmt virtual uses. + (finalize_ssa_stmt_operands): New. Commit all stmt operands. + (verify_start_operands): New. Verify build mechanism is ready for a new + stmt. + (append_def): Renamed from add_def, and moved from tree-dfa.c. + (append_use): Renamed from add_def, and moved from tree-dfa.c. + (append_vdef): Renamed from add_def, and moved from tree-dfa.c. + (append_vuse): Renamed from add_def, and moved from tree-dfa.c. + (add_vuse): New. Entry point to add a vuse to a stmt. + (get_call_flags): Moved from tree-dfa.c + (get_stmt_operands, get_expr_operands, add_stmt_operand): Moved from + tree-dfa.c, and use new optype interface. + (note_addressabe, add_call_clobber_ops, add_call_read_ops): Moved from + tree-dfa.c + +2003-12-15 Diego Novillo <dnovillo@redhat.com> + + * tree-optimize.c (optimize_function_tree): Call BITMAP_XFREE. + +2003-12-15 Diego Novillo <dnovillo@redhat.com> + + PR optimization/12747 + + * tree-cfg.c (verify_addr_expr): Simplify predicates. + * tree-must-alias.c (addresses_needed): Declare as file local. + (can_be_promoted): New. + (tree_compute_must_alias): Call it. + Remove promoted variables from call_clobbered_vars. + (find_addressable_vars): Update comment. + Remove argument. Update callers. + (promote_var): Always clear TREE_ADDRESSABLE. + Don't remove promoted variables from call_clobbered_vars. + If the promoted variable is in the may-alias set of a + non-promotable variable, copy its alias set into the alias set of + the non-promotable variable. + (find_variable_in): Update comment. + * tree-sra.c (can_be_scalarized_p): Reject structures with + __complex__ fields in them. + +2003-12-15 Diego Novillo <dnovillo@redhat.com> + Jason Merrill <jason@redhat.com> + + PR optimization/12747 + + * Makefile.in (tree-simple.o): Add dependency on bitmap.h and + $(GGC_H). + (GTFILES): Add tree-simple.c. + * tree-simple.c: Include ggc.h and bitmap.h. + (is_gimple_non_addressable_1): Remove. Update all callers. + (types_checked): New local variable. + (types_in_memory): New local variable. + (struct_needs_to_live_in_memory): New. + (needs_to_live_in_memory): New. + (is_gimple_reg): Call it. + (is_gimple_non_addressable): Call it. + (is_gimple_call_clobbered): Call it. + * tree-simple.h (needs_to_live_in_memory): Declare. + +2003-12-14 Andreas Jaeger <aj@suse.de> + + * config/rs6000/rs6000.c (rs6000_output_function_epilogue): Handle + GNU F95. + +2003-12-14 Jan Hubicka <jh@suse.cz> + + * cgraphunit.c (cgraph_expand_function): Release function body when no + longer needed. + (lookup_recursive_calls): New function. + (cgraph_decide_recursive_inlining): Likewise. + (cgraph_decide_inlining_of_small_functions): Do recursive inlining. + * tree-inline.c: Include function.h + (copy_body): Choose saved body for recursive inlining. + (initialize_inlined_parameters): Likewise. + (expand_call_inline): Do not verify nodes when recursivly inlining, + insert ret_label into decl map. + * params.def (PARAM_MAX_INLINE_INSNS_RECURSIVE, + PARAM_MAX_INLINE_INSNS_RECURSIVE_AUTO, + PARAM_MAX_INLINE_RECURSIVE_DEPTH, + PARAM_MAX_INLINE_RECURSIVE_DEPTH_AUTO): New argument. + * invoke.texi (max-inline-insns-recursive, max-inline-recursive-depth): + Document. + * Makefile.in (tree-inline.o): Include function.h. + +2003-12-14 Jan Hubicka <jh@suse.cz> + + * cgraphunit.c (record_call_1): Do not call analyze_expr hook + * langhooks-def.h (LANG_HOOKS_CALLGRAPH_ANALYZE_EXPR): Kill. + (LANG_HOOKS_CALLGRAPH_INITIALIZER): Update. + * longhooks.h (lang_hooks_for_callgraph): Kill analyze_expr. + +2003-12-13 Jan Hubicka <jh@suse.cz> + + * timevar.def (TV_TREE_STMT_VERIFY, TV_CFG_VERIFY, TV_CGRAPH_VERIFY): + New timers. + * tree-cfg.c (verify_stmts): Push/pop timevar. + * cfg.c: Include timevar.h + (verify_flow_info): Push/pop timevar. + * Makefile.in (cfg.o): Add dependnecy on TIMEVARS + + * cgraph.c (cgraph_create_edge): Sanity check for duplicates; + initialize aux. + (cgraph_remove_node): Decrease cgraph_n_nodes; do not clear + DECL_SAVED_TREE when dumping. + (cgraph_dump_node): Break out from ...; print more information. + (cgraph_dump): ... here. + * cgraph.h (cgraph_node): Add aux field. + (dump_cgraph_node, verify_cgraph, verify_cgraph_node): Declare. + (cgraph_mark_inline_edge): Declare + * cgraphunit.c (error_found): New static variable. + (verify_cgraph_node_1): New static function. + (verify_cgraph_node, verify_cgraph): New global function. + (cgraph_expand_function): More sanity checks. + (cgraph_clone_inline_nodes): Destructivly clone DECL_EXTERNAL nodes. + (cgraph_mark_inline_edge): Make global. + (cgraph_decide_inlining): Remove extern inline functions never inlined. + (cgraph_decide_inlining_incrementally): Verify that function body is + still present. + (expand_all_functions): Verify that all nodes are reachable. + (cgraph_optimize): Verify cgraph and memory management. + * tree-inline.c (copy_body_r): All edges must be present. + (expand_call_inline): Sanity check newly created edges and nodes + being inlined. + (optimize_inline_calls): Sanity check that we've inlined everything. + * tree-optimize.c (tree_rest_of_compilation): Clone functions inlined + into cloned node. + +2003-12-13 Jan Hubicka <jh@suse.cz> + + * tree-flow.h (tree_ssa_useless_type_conversion_1): Declare. + * tree-flow.c (tree_ssa_useless_type_conversion_1): Break out from + from...; allow complex types whose subtypes match. + (tree_ssa_useless_type_conversion): ... here. + +2003-12-12 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_stmt): Don't call cleanup_control_expr + here. Instead just note that we need to cleanup the cfg (which + will DTRT). + + * timevar.def (TV_TREE_SSA_THREAD_JUMPS): Kill. + * tree-dump.c (dump_files): Kill .thread dump. + * tree.h (TDI_thread_jumps): Kill. + * tree-flow.h (tree_ssa_dominator_thread_jumps): Kill prototype. + * tree-optimize.c (optimize_function_tree): Kill call to + tree_ssa_dominator_thread_jumps. + * tree-ssa-dom.c (thread_through_phis): Kill. We no longer need + to restrict threading through PHIs. + (tree_ssa_dominator_thread_jumps): Kill. + (tree_ssa_domiantor_optimize_1): Fold back into + tree_ssa_dominator_optimize. + (tree_ssa_dominator_optimize): Mark back edges in the flow graph. + Kill code which conditionalized the walk_tree callbacks based + on thread_through_phis. When threading jumps, reorganize code + so that we can take the affected variables out of SSA form. + Mark new variables created by out-of-ssa code as needing to be + rewritten. + (thread_across_edge): Always allow threading through phis. + (thread_jumps_walk_stmts): Kill. + + * tree-ssa.c (create_temp): When we create a new temporary, make + sure to put it into referenced_vars, give it an ID number and + a suitable mem_tag. + (eliminate_build): If we encounter a PHI argument which is an + SSA_VAR we are not rewriting out of SSA form, then just treat + it like a constant. + (rewrite_vars_out_of_ssa): New function. + * tree-flow.h (rewrite_vars_out_of_ssa): Prototype. + * tree-ssa-live.c (register_ssa_partitions_for_vars): New function. + * tree-ssa-live.h (register_ssa_partitions_for_vars): Prototype. + +2003-12-12 Jan Hubicka <jh@suse.cz> + + * tree-inline.c (remap_decl): Avoid invalid sharing. + * cp-tree.h (optimize_function): Kill. + * optimize.c (optimize_function): Kill. + * semantics.c (expand_body): Do not call optimize_function. + +2003-12-12 Jan Hubicka <jh@suse.cz> + + * cgraphunit.c (cgraph_optimize): Do not decide inlining when not + inlining + +2003-12-11 Jan Hubicka <jh@suse.cz> + + * tree-inline.c (initialize_inlined_parameters): Disable + constant propagation for non-gimple-min-invariant when + preserving gimple form. + +2003-12-11 Jeff Law <law@redhat.com> + + * tree-ssa-ccp.c (widen_bitfield): Clear out unwanted high bits + even if the field's type is unsigned. + * tree-ssa-dom.c (record_equivalences_from_stmt): When creating + equivalences from stores, be more careful about non-constant + stores to bitfields. + +2003-12-11 Diego Novillo <dnovillo@redhat.com> + + * opts.c (decode_options): Do not enable the tree loop optimizer by + default. + * tree-ssa-loop.c (tree_ssa_loop_opt): Remove ENABLE_CHECKING + guards. + +2003-12-10 Richard Henderson <rth@redhat.com> + + * builtins.c (expand_builtin_profile_func): New. + (expand_builtin): Use it. + * builtins.def (BUILT_IN_PROFILE_FUNC_ENTER): New. + (BUILT_IN_PROFILE_FUNC_EXIT): New. + * function.c (expand_function_start, expand_function_end): Don't + do function instrumentation here. + * gimplify.c (gimplify_function_tree): Do it here. + + * c-opts.c (c_common_post_options): Don't ever use rtl inlining. + +2003-12-10 Diego Novillo <dnovillo@redhat.com> + + * ifcvt.c (dead_or_predicable): Initialize local variable + 'earliest'. + * tree-cfg.c (verify_stmt): Fix typo. + * tree-ssa-dom.c (propagate_value): New local function. + (cprop_into_stmt): Call it. + (cprop_into_phis): Call it. + (eliminate_redundant_computations): Call it. + +2003-12-10 Dale Johannesen <dalej@apple.com> + + * tree-dfa.c (compute_alias_sets): Don't try to make + GLOBAL_VAR alias itself. + +2003-12-08 Steven Bosscher <stevenb@suse.de> + + * tree-must-alias.c (tree_compute_must_alias): Use + num_call_clobbered_vars and call_clobbered_var() instead of + poking in the call_clobbered_vars varray directly. + +2003-12-11 Jan Hubicka <jh@suse.cz> + + * cgraph.c (cgraph_function_possibly_inlined_p): Fix syntax error on + gcc-2.95. + +2003-12-10 Diego Novillo <dnovillo@redhat.com> + + Revert + + 2003-12-07 Richard Henderson <rth@redhat.com> + + * c-common.c (c_address_looks_like_offsetof): New. + * c-common.h (c_address_looks_like_offsetof): Declare. + * c-typeck.c (build_unary_op) <ADDR_EXPR>: Use it. Don't lower + address references not destined for offsetof. + (c_expand_return): Only look inside ARRAY_REF and COMPONENT_REF + when looking for returning address of local variable. + * expr.c (expand_expr_1): Don't dereference size + of unbounded arrays. + * gimplify.c (gimplify_addr_expr): Only fold + address of variable size array elements. + * tree-simple.c (is_gimple_min_invariant): Also check + is_gimple_variable before disallowing offset address for type. + * tree-ssa-ccp.c (maybe_fold_offset_to_aggregate_ref): New. + (maybe_fold_offset_to_component_ref): Use it. + (maybe_fold_stmt_indirect, maybe_fold_stmt_plus): Likewise. + (maybe_fold_offset_to_array_ref): Likewise. + Don't fail for division remainder non-zero. + * varasm.c (initializer_constant_valid_p) <ADDR_EXPR>: Use + handled_component_p and look inside references. + <MINUS_EXPR>: Always look past widening casts. + +2003-12-09 Jan Hubicka <jh@suse.cz> + + * cgraph.c (cgraph_inline_hash): New global variable. + (cgraph_create_node): Break out of .... + (cgraph_node): ... this one. + (cgraph_redirect_edge_callee): New function. + (cgraph_remove_node): Aggressively elliminate dead nodes; + remove node out of clone list. + (dump_cgraph): Dump inlined_to field; dump uid numbers. + (cgraph_clone_edge): Return edge created. + (cgraph_clone_node): New. + (cgraph_function_possibly_inlined_p): Re-implement using hashtable. + * cgraph.h: Include hashtab.h + (struct cgraph_global_info): Kill inline_once, will be output and + cloned_times fields. Add inlined_to field. + (cgraph_node): Add next_clone. + (cgraph_inline_hash): Declare. + (cgraph_clone_edge): Update prototype. + (cgraph_clone_node, cgraph_redirect_callee): Declare. + * cgraphunit.c (cgraph_optimize_function): Kill. + (cgraph_assemble_function): Kill next_needed to avoid GGC corruption. + (cgraph_analyze_function): Do not intialize cloned_times and + will_be_output. + (cgraph_finalize_compilation_unit): Clear next_needed. + (cgraph_optimize_function): Kill. + (cgraph_expand_function): Do not use cgraph_optimize_function. + (cgraph_estimate_growth, cgraph_mark_inline, + cgraph_check_inline_limits, cgraph_recursive_inlining_p, + cgraph_preserve_function_body_p): Update for explicit clones. + (INLINED_TIMES, SET_INLINED_TIMES, cgraph_inlined_into, + cgraph_inlined_callees, struct cgraph_inline_context, + cgraph_create_inline_context, cgraph_free_inline_context, + cgraph_inline_context_set_caller, cgraph_inline_context_clear_caller, + cgraph_inline_context_set_callee, cgraph_inline_context_clear_callee, + update_callee_keys): Kill. + (cgraph_clone_inlined_nodes, cgraph_mark_inline_edge): New. + (cgraph_decide_inlining_of_small_functions, (cgraph_decide_inlining, + cgraph_decide_inlining_incrementally): Simplify. + * tree-inline.c (typedef struct_inline_data): New field saving_p. + (copy_body_r): Update all clones. + (expand_call_inline): Remove inlined cgraph node. + (save_body): Inicialize id.node and id.saving_p. + * tree-optimize.c (tree_rest_of_compilation): Maintain clone up-to-date + in no-unit-at-a-time mode. + +2003-12-08 Steven Bosscher <stevenb@suse.de> + + * tree-optimize.c (optimize_function_tree): Move verify_ssa calls + into conditionals. + +2003-12-08 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ander.c (andersen_same_points_to_set): Fix memory leak. + +2003-12-08 Jeff Law <law@redhat.com> + + * tree-ssa-live.c (register_ssa_partition): Kill legacy code which + recursively called register_ssa_partition on PHI arguments when + SSA_VAR was defined by a PHI_NODE. + +2003-12-08 Jan Hubicka <jh@suse.cz> + + * tree-dump.c (dump_files): Fix ordering of tail call pass. + * tree.h (tree_dump_index): Likewise. + +2003-12-08 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * Makefile.in (tree-cfg.o): Add gt-tree-cfg.h dependency. + (GTFILES): Add tree-cfg.c. + * tree-cfg.c: Include gt-tree-cfg.h. + (factored_computed_goto_label, factored_computed_goto): + Mark gc roots. + +2003-12-08 Steven Bosscher <stevenb@suse.de> + Jan Hubicka <jh@suse.de> + + * gengtype-lex.l (IWOrD): Add HOST_WIDEST_INT + * Makefile.in (function.o, reg-stack.o): Add missing dependency on + basic-block.h. + (GTFILES): Add basic-block.h and hwint.h. + * basic-block.h (struct edge_def): Add GTY markers, make garbage + collectable. Make `insns' field GC safe depending on the setting + of cfg_hooks. + (struct basic_block_def): Add GTY markers, make garbage collectable. + (tree_bb_root, tree_phi_root): Kill extern decls. + (ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR): Change from macro to variable + (entry_exit_blocks): Kill. + * cfg.c: Include ggc.h + (bb_pool, edge_pool, entry_exit_blocks): Kill. + (ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR): Define. + (init_flow): Do not create ppols; allocate entry/exit block. + (free_edge, alloc_block, expunge_block, unchecked_make_edge): Use GGC. + (compact_blocks): Don't update tree_bb_root and tree_phi_root. + * cfgrtl.c (rtl_merge_blocks): Clear head pointer. + * regs.h: Protect against multiple inclusion. + * tree-cfg.c (obstack_tree_ann_obstack, first_block_tree_and_obj, + tree_bb_root): Kill. + (build_tree_cfg, create_bb, remove_bb, delete_tree_cfg): Don't + touch tree_bb_root and tree_phi_root. + (create_block_annotations): Do not initialize obstack. + (free_block_annotations): Do not free obstack. + (create_block_annotation): Use GGC. + * tree-dfa.c (tree_phi_root): Kill. + * tree-flow.h (bb_ann, bb_ann_d): Declare. Add `phi_nodes' field. + * tree-phinodes.c (create_phi_node, add_phi_arg, remove_phi_node, + remove_all_phi_nodes_for): Use `phi_nodes' field in the bb + annotation instead of tree_phi_root. + * tree-flow-inline.h (phi_nodes, set_phi_nodes): Likewise. + (add_dom_child, clear_dom_children): Use GGC. + * tree-ssa-pre.c (code_motion): Use `phi_nodes' field in the bb + annotation instead of tree_phi_root. + * varray.h (union varray_data): Make basic_block_def and edge_def + varrays garbage collectable. + +2003-12-07 Richard Henderson <rth@redhat.com> + + * c-common.c (c_address_looks_like_offsetof): New. + * c-common.h (c_address_looks_like_offsetof): Declare. + * c-typeck.c (build_unary_op) <ADDR_EXPR>: Use it. Don't lower + address references not destined for offsetof. + (c_expand_return): Only look inside ARRAY_REF and COMPONENT_REF + when looking for returning address of local variable. + * expr.c (expand_expr_1): Don't dereference size of unbounded arrays. + * gimplify.c (gimplify_addr_expr): Only fold address of variable size + array elements. + * tree-simple.c (is_gimple_min_invariant): Also check + is_gimple_variable before disallowing offset address for type. + * tree-ssa-ccp.c (maybe_fold_offset_to_aggregate_ref): New. + (maybe_fold_offset_to_component_ref): Use it. + (maybe_fold_stmt_indirect, maybe_fold_stmt_plus): Likewise. + (maybe_fold_offset_to_array_ref): Likewise. Don't fail for division + remainder non-zero. + * varasm.c (initializer_constant_valid_p) <ADDR_EXPR>: Use + handled_component_p and look inside references. + <MINUS_EXPR>: Always look past widening casts. + +2003-12-07 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (compute_dominance_frontiers): Don't assume that + the first block has index 0. + +2003-12-07 Jan Hubicka <jh@suse.cz> + + * cgraph.c (create_edge): Rename to ... + (cgraph_create_edge): ... this one; accept call_expr as operand. + (cgraph_edge): New function + (cgraph_remove_edge): Use edge as argument + (cgraph_record_call, cgraph_remove_call): Kill. + (clone_cgraphedge): New function. + * cgraph.h (cgraph_edge): Add call_expr argument; add chain_next. + (cgraph_record_call, cgraph_remove_call): Kill prototype. + (cgraph_remove_call, cgraph_inline_p): Update prototype. + (cgraph_clone_edge): Declare. + * cgraphunit.c (cgraph_finalize_function): Update use of + cgraph_remove_edge + (record_call_1): Use cgraph_create_edge; record builtins too. + (cgraph_create_edges): Accept node instead of decl. + (cgraph_analyze_function): Update use cgraph_create_edges. + (cgraph_inline_p): Accept edge. + * tree-inline.c (inline_data): Replace decl and current_decl + by node and current_node. + (copy_body_r): Clone edges. + (expand_call_inline): Do not create inlined edges. + (optimize_inline_call): Set id->current_node, id->node. + * tree-optimize.c (tree_rest_of_compilation): Update cgraph edges after + compiling. + +2003-12-07 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-loop.c (dump_file, dump_flags): Only declare with + checking enabled. + (tree_ssa_loop_opt): Mark arguments with ATTRIBUTE_UNUSED. + +2003-12-07 Richard Henderson <rth@redhat.com> + + * function.h (struct function): Add last_label_uid. + * tree-cfg.c (set_bb_for_stmt): Use it. + (delete_tree_cfg): Clear label_to_block_map. + + * gimple-low.c (lower_stmt_body): Export. + (lower_stmt): Allow data to be null. + * gimplify.c (declare_tmp_vars): Make static. + (push_gimplify_context): Export. + (pop_gimplify_context): Export. Put the temps somewhere. + (gimplify_body): Don't declare_tmp_vars here. + * tree-flow.h, tree-simple.h: Update for new decls. + + * tree-mudflap.c (mf_build_string): New. + (mudflap_c_function_decls): Push and pop gimplify context, don't + gimplify here. Dump pass 1. + (mudflap_c_function_ops): Similarly. + (mf_decl_cache_locals): Gimplify eveything as we go along. + (mf_build_check_statement_for): Likewise. + (mf_mostly_copy_tree_r): Remove. + (mf_varname_tree): Use mf_build_string. + (mf_file_function_line_tree): Rewrite. + (mf_offset_expr_of_array_ref): Remove. + (mx_xfn_indirect_ref): Remove. + (mf_xform_derefs_1): New. + (mf_xform_derefs): Rewrite to expect gimple. + (mx_register_decls): Use build_function_call_expr. + (mudflap_enqueue_constant): Use mf_build_string. + * tree-optimize.c (tree_rest_of_compilation): Reorder mudflap bits. + * tree-dump.c (dump_files): Split mudflap to parts 1 and 2. + * tree.h (enum tree_dump_index): Likewise. + +2003-12-06 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa-loop.c: New. + * Makefile.in (tree-ssa-loop.o): New. + * common.opt (ftree-loop-optimize): Add. + * flags.h (flag_tree_loop): Declare. + * opts.c (decode_options): Enable flag_tree_loop at -O1. + (common_handle_option): Handle OPT_ftree_loop_optimize. + * timevar.def (TV_TREE_LOOP): New. + * toplev.c (flag_tree_loop): New. + (f_options): Add -ftree-loop-optimize. + * tree-cfg.c (build_tree_cfg): Remove disabled loop optimizer + initialization. + (tree_make_forwarder_block): Update phi nodes. + (tree_loop_optimizer_init): Don't call force_single_succ_latches. + (tree_try_redirect_by_replacing_jump): Comment fix. + * tree-dump.c (dump_files): Add .loop dump. + * tree-flow.h (tree_ssa_loop_opt, set_phi_nodes): Declare. + * tree-optimize.c (optimize_function_tree): Call tree_ssa_loop_opt. + * tree.h (enum tree_dump_index): Add TDI_loop. + * tree-flow-inline.h (set_phi_nodes): New. + * doc/invoke.texi (-fdump-tree-loop, -ftree-loop-optimize): Document. + +2003-12-05 Jeff Law <law@redhat.com> + + * tree-dfa.c (mark_new_vars_to_rename): Change VARS_TO_RENAME to be + a "bitmap" instead of an "sbitmap". Callers updated. + * tree-must-alias.c (promote_var): Likewise. + (tree_compute_must_alias): Likewise. + * tree-phinodes.c (remove_all_phi_nodes_for): Likewise. + * tree-ssa-dom.c (tree_ssa_dominator_thread_jumps): Likewise. + (tree_ssa_dominator_optimize): Likewise. + (tree_ssa_dominator_optimize_1): Likewise. + * tree-ssa-pre.c (pre_expression): Likewise. + (tree_perform_ssapre): Likewise. + * tree-ssa.c (rewrite_into_ssa): Likewise. + (insert_phi_nodes): If VARS_TO_RENAME is zero, then examine + each node to determine if we need to insert a PHI. + (prepare_operand_for_rename): If VARS_TO_RENAME is zero, then + assume the operand needs renaming. + * tree-ssa-ccp.c (substitute_and_fold): Change VARS_TO_RENAME to + be a "bitmap" instead of an "sbitmap". Callers updated. + (tree_ssa_ccp): Likewise. Also make sure timevar_pop encloses + entire function. + (scalarize_modify_expr): Likewise. + * tree-sra.c (create_scalar_copies): Change VARS_TO_RENAME to + be a "bitmap" instead of an "sbitmap". Callers updated. + (tree_sra): Likewise. + * tree-optimize.c (optimize_function_tree): Make VARS_TO_RENAME + be a "bitmap" instead of an "sbitmap". + * tree-flow.h: Update various prototypes. + +2003-12-05 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (remove_useless_stmts_goto, remove_useless_stmts): Move + handling of factored_computed_goto ... + (disband_implicit_edges): ... here. + +2003-12-05 Jan Hubicka <jh@suse.cz> + + * tree-eh.c (tree_could_trap_p): Fix warning. + * expr.c (expand_expr): Fix warning on uninitialized last. + +2003-12-04 Jeff Law <law@redhat.com> + + * tree-ssa.c (rewrite_trees): Do not unconditionally overwrite + variables set by statements. Let replace_variable do any + required rewriting. + +2003-12-04 Richard Henderson <rth@redhat.com> + + * c-parse.in (primary): Use annotate_with_locus instead of + STMT_LINENO for STMT_EXPR. + * c-simplify.c (gimplify_stmt_expr): Likewise. + +2003-12-04 Jan Hubicka <jh@suse.cz> + + * tree-dump.c (dump_files): Reorder tailcall and mustalias + * tree.h (tree_dump_index): Likewise. + * tree-optimize.c (optimize_function_tree): Do tail call after mustalias. + +2003-12-04 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (opf_none, opf_is_def, opf_no_vops): Change to #define. + +2003-12-04 Canqun Yang <canqun@nudt.edu.cn> + + * stor-layout.c (update_alignment_for_field): Export. + * tree.h (update_alignment_for_field): Declare. + +2003-12-03 Andrew Haley <aph@redhat.com> + + * tree-eh.c (tree_could_trap_p): Add division instructions. + * expr.c (expand_expr): Check the EH region of an expression and + mark all the insns that result from its expansion with the + appropriate REG_EH_REGION. + +2003-12-03 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (verify_addr_expr, verify_stmt, tree_node_shared_p, + verify_stmts): New functions. + (verify_flow_info): Remove PHI checking code. + * tree-flow.h (verify_stmt, verify_stmts): Declare. + * tree-inline.h (walk_tree, walk_tree_without_duplicates): Move + prototypes ... + * tree.h (walk_tree, walk_tree_without_duplicates): ... here. + +2003-12-03 Jan Hubicka <jh@suse.cz> + Diego Novillo <dnovillo@redhat.com> + + * tree-ssa.c (verify_def, verify_use, verify_phi_args): New static + functions. + (verify_ssa): New global function. + * tree-flow.h (verify_ssa): Declare. + * tree-optimize.c (optimize_function_tree): Call it. + +2003-12-03 Diego Novillo <dnovillo@redhat.com> + + * timevar.def (TV_TREE_SSA_VERIFY): New timer. + * tree-sra.c (create_scalar_copies): Always mark the previous + variables on the LHS for renaming. + Do not emit unnecessary assignments from VA_ARG_EXPRs. + (scalarize_modify_expr): Similarly, when scalarizing the LHS of a + COMPONENT_REF assignment. + * tree-must-alias.c (tree_compute_must_alias): Do not promote + variables with hidden uses. + * tree-ssa-ccp.c (set_rhs): When replacing the whole statement, reset + SSA_NAME_DEF_STMT for all the SSA_NAMEs in vdef and def + operands. + +2003-12-03 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (opf_no_vops): New. + (add_stmt_operand): Don't create virtual operands when opf_no_vops + is passed in flags. + (get_expr_operands): Set opf_no_vops flag before diving into the + operand of an ADDR_EXPR node. + +2003-12-03 Richard Henderson <rth@redhat.com> + + * tree-simple.c (is_gimple_min_invariant): Disallow offset of + address of a scalar. + + * c-parse.in (primary): Set STMT_LINENO on STMT_EXPR. + * c-simplify.c (gimplify_stmt_expr): Be prepared for last_stmt + to be null. + +2003-12-03 Daniel Berlin <dberlin@dberlin.org> + + Fix PR 13177 + * tree-ssa-pre.c (code_motion): Do phi nodes last, and rearrange + how we decide what temporary to choose so that we get it right. + +2003-12-03 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-dfa.c (get_expr_operands): Don't record VUSEs for invariant + adresses. + +2003-12-03 Brian Booth <bbooth@redhat.com> + + * tree-pretty-print.c (dump_phi_nodes): Removed superfluous ampersand. + +2003-12-03 Jeff Law <law@redhat.com> + + * ggc-page.c: Resync with mainline sources. Remove tree-ssa + specific hack which disabled special GC pagesizes for 2 operand + tree expressions. + + * tree-ssa.c (mark_def_sites): Call prepare_operand_for_rename + on the VDEF_RESULT as well, providing a dummy uid argument. + + * tree-phinodes.c: Include rtl.h for ceil_log2. + (ideal_phi_node_len): New function. + (resize_phi_node): Make static. + (make_phi_node): Use ideal_phi_node_len. + (add_phi_arg): Likewise. + * tree.h (resize_phi_node): Remove prototype. + * Makefile.in (tree-phinodes.o): Depend on $(RTL_H). + +2003-12-03 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c: (make_edges): Eliminate fallthru to exit. + (make_ctrl_stmt_edges): Nonlocal goto handling moved to + make_goto_expr_edges. + (make_goto_expr_edges): Remove simple gotos. + (cfg_remove_useless_stmts_bb): Goto removal cancelled. + (cleanup_cond_expr_graph, cleanup_switch_expr_graph): + Replaced by ... + (cleanup_control_expr_graph): New. + (cleanup_control_flow): Use it. + (disband_implicit_edges): New. + (tree_find_edge_insert_loc): Never insert before a control statement. + (tree_split_edge, thread_jumps, tree_try_redirect_by_replacing_jump, + tree_redirect_edge_and_branch): Work over no-gotos form. + (tree_verify_flow_info): Check no-gotos form invariants. + * tree-pretty-print.c (pp_cfg_jump, dump_implicit_edges): New. + (dump_generic_bb_buff): Call dump_implicit_edges. + * tree-flow.h (cleanup_cond_expr_graph, cleanup_switch_expr_graph): + Declaration removed. + (cleanup_control_expr_graph, delete_tree_ssa, disband_implicit_edges): + Declare. + * tree-optimize.c (tree_ssa_finish): New. + (optimize_function_tree): Call it. + * tree-ssa-dom.c (thread_jumps_walk_stmts, optimize_stmt): Use + cleanup_control_expr_graph. + * tree-ssa.c (delete_tree_ssa): Export, work even if there are no + referenced_vars. + (rewrite_out_of_ssa): Don't call it. + +2003-12-03 Jan Hubicka <jh@suse.cz> + + * tree-ssa.dom.c (tree_ssa_domionator_thread_jumps): Mark back edges. + (thread_across_edge): Do not thread across loop headers. + + * Makefile.in (tree-optimize.o): Depend on cgraph.h + * cgraph.h (cgraph_preserve_function_body_p): Declare. + * cgraphunit.c (cgraph_preserve_function_body_p): New function. + * tree-optimize.c: Include cgraph.h + (clear_decl_rtl): Kill. + (tree_rest_of_compilation): Use cgraph_preserve_function_body_p; + do not clear DECL_RTL; do final ggc in the pushed context for nested + functions; + +2003-12-02 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_stmt): Accept and pass down dominator + walker structure instead of individual varrays. Callers updated. + (eliminate_redundant_computations): Likewise. + (simplify_rhs_and_lookup_avail_expr): Likewise. Cache and update + a dummy COND_EXPR when querying the hash tables when transforming + DIV/MOD into RSHIFT/BIT_AND or ABS_EXPR into NEG_EXPR. + (dom_opt_walk_stmts): Don't reload the block data pointer each + iteration of the loop. Load it once outside the loop. + + * tree-dfa.c (cleanup_operand_arrays): Avoid creating a new + varray for the vuse operands. + + * tree-ssa-dom.c (extract_range_from_cond): Use int_const_binop to + avoid creating useless tree nodes. + + * tree-phinodes.c (add_phi_arg): If we receive a new node from + resize_phi_node, then release the old node and update the PHI + chain. + +2003-12-02 Brian Booth <bbooth@redhat.com> + + * tree-pretty-print.c (dump_phi_nodes): Added code to always show phi + nodes of regular gimple scalars. + (dump_generic_bb_buff): Removed condition upon which to show phi nodes. + +2003-12-02 Jan Hubicka <jh@suse.cz> + + * tree-optimize.c (optimize_function_tree): Invoke ggc_collect in + between optimization passes. + +2003-12-02 Daniel Berlin <dberlin@dberlin.org> + + * tree-sra.c (can_be_scalarized_p): Print details about why something + could not be scalarized to the dump file. + +2003-12-01 Jeff Law <law@redhat.com> + + * Makefile.in (OBJS-common): Add tree-phinodes.o. + (tree-phinodes.o): Add dependencies. + (GTFILES): Add tree-phinodes.c. + * tree-phinodes.c: New file. + * tree-dfa.c (create_phi_node): Moved to tree-phinodes.o. + (add_phi_arg, remove_phi_arg, remove_phi_arg_num): Similarly. + (remove_phi_node, remove_all_phi_nodes_for): Similarly. + * tree-ssa.c (init_tree_ssa): Initialize PHI node management. + (delete_tree_ssa): Finalize PHI node management. + * tree.c (dump_tree_statistics): Dump PHI node stats. + (make_phi_node, resize_phi_node): Moved to tree-phinodes.o. + * tree.h (init_phinodes): Prototype. + (fini_phinodes, release_phi_node): Likewise. + (phinodes_print_statistics): Likewise. + +2003-12-01 Richard Henderson <rth@redhat.com> + + * tree-dfa.c (get_expr_operands): Don't handle PLUS_EXPR inside + INDIRECT_REF. + * tree-ssa-ccp.c (maybe_fold_offset_to_array_ref): Use int_const_binop. + (maybe_fold_offset_to_component_ref): Likewise. + (maybe_fold_stmt_indirect): Likewise. + (maybe_fold_stmt_plus): Expand ARRAY_REF when seen with addend. + * fold-const.c (int_const_binop): Export. + * tree.h (int_const_binop): Declare. + +2003-12-01 Jan Hubicka <jh@suse.cz> + + * basic-block.h (tree_phi_root): New variable. + * cfg.c: Include tree-flow.h. + (compact_blocks): Compact tree_phi_root + * tree-cfg.c (build_tree_cfg): Initialize tree_phi_root. + (create_bb, remove_bb, delete_tree_cfg): Update tree_phi_root. + * tree-dfa.c (tree_phi_root): Declare. + (create_phi_node, add_phi_arg, remove_phi_node, + remove_all_phi_nodes_for): Always use accessor functions for + getting, varray for setting phis. + * tree-ssa-pre.c (code_motion): Likewsie. + * tree-flow-inline.h (phi_nodes): Use varray. + * tree-flow.h (bb_ann_d): Remove phi_nodes. + + * tree-ssanames.c (free_ssanames): Do not use deleteable GTY flag. + +2003-11-30 Jan Hubicka <jh@suse.cz> + + * tree-optimize.c (tree_rest_of_compilation): Move ggc_collect call to + the end of function; keep clearing of DECL_SAVED_TREE to the cgraph + code. + +2003-11-30 Jan Hubicka <jh@suse.cz> + + * cgraphunit.c (cgraph_inline_context): New structure. + (cgrpah_mark_inline, cgraph_check_inline_limits): Use context + instead of passing all arguments by hand. + (cgraph_create_inline_context, cgraph_free_inline_context, + cgraph_inline_context_set_caller, cgraph_inline_context_clear_caller, + cgraph_inline_context_set_callee, cgrpah_inline_context_clear_callee, + cgraph_recursive_inlining_p): New static function. + (cgraph_decide_inline*): Reorganize to use context. + +2003-11-30 Paul Brook <paul@nowt.org> + + * Makefile.in (GTFILES): Remove stray '\'. + +2003-11-30 Daniel Berlin <dberlin@dberlin.org> + + * c-config-lang.in: Move tree-alias-* from here + * Makefile.in (GTFILES): To here. + * tree-alias-ander.c: Include bitmap.h + (andersen_function_call): Updated to take address of variables + in an ADDR_EXPR in a CALL_EXPR. + * tree-alias-common.h (struct tree_alias_ops): Update arguments to + function_call. + * tree-alias-type.h (struct alias_typevar_common): Add varnum. + * tree-alias-common.c: Include bitmap.h, and function.h. + s/global_var/pta_global_var/g. + (addrargs): New static variable. + (pta_global_var): Ditto. + (find_func_decls): Remove. + (find_func_aliases): Take one argument, update all callers. + Handle (cast) [addr-expr] [var]. + Handle COMPONENT_REF of an INDIRECT_REF. + Pass info about ADDR_EXPR arguments to function_call function. + (deal_with_call_aliasing): New function. + (call_may_return): New function. + (get_alias_var_decl): Call find_func_aliases on the DECL_INITIAL + of a global var. + Use ALIAS_TVAR_VARNUM, instead of VARRAY_ACTIVE_SIZE (alias_vars) - 1. + (get_alias_var): Handle REALPART_EXPR and IMAGPART_EXPR. + Return NULL in default case. + (intra_function_call): Remove wrong code. + (create_fun_alias_var): Use simple_assign, not addr_assign. + Set up ALIAS_TVAR_VARNUM when creating an alias var. + (create_fun_alis_var_ptf): Ditto on ALIAS_TVAR_VARNUM. + (create_alias_var): Ditto. + (create_alias_vars): Build pta_global_var here. + Walk unexpanded_var_list. + Walk the statements in basic blocks. + (delete_alias_vars): Correct ip_partial case. + Free addrargs. + (init_alias_vars): Create addrargs. + +2003-11-29 Jan Hubicka <jh@suse.cz> + + * Makefile.in (tree-ssanames.o): Depend on gt-tree-ssanames.h. + (tree-eh.o): Depend on gt-tree-eh.h. + (gr-tree-ssanames.h, gt-tree-eh.h): New targets. + (GTFILES): Add tree-ssanames.c, tree-eh.c + * tree-eh.c: Include ggc.h and gt-tree-eh.h + (lower_eh_constructs): Allecate throw_stmt_table in ggc. + * tree-ssanames.c: Include ggc.h and gt-tree-ssanames.h + + * function.h (struct function): Add saved_tree/saved_args. + * toplev.c (rest_of_compilation): Move code to clear cfun and + DECL_SAVED_INSNS and call to ggc_collect to ... + * tree-optimize.c (tree_rest_of_compilation): ... this function. Use + cfun to save/restore function body. + +2003-11-28 Richard Henderson <rth@redhat.com> + + * gimplify.c (create_tmp_var_raw): Split out from create_tmp_var. + (create_tmp_var): Use it. + (create_tmp_alias_var): Remove. + * tree-alias-common.c, tree-dfa.c: Use create_tmp_var_raw instead. + * tree-simple.h: Update decls. + +2003-11-28 Richard Henderson <rth@redhat.com> + + * gimple-low.c (lower_function_body): Call lower_bind_expr + to handle the outermost BIND_EXPR. + +2003-11-28 Jan Hubicka <jh@suse.cz> + + * tree-ssa.c (remove_annotations_r): Kill. + (delete_tree_ssa): Remove annotations using statement walk; + kill argument fndecl. + (rewrite_out_of_ssa): Update call. + +2003-11-27 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-live.c (register_ssa_partition): Abort if a virtual SSA + version is registered. + (create_ssa_var_map): Always process PHI nodes. + * tree-ssa.c (Eliminate_virtual_phis): Rename from + eliminate_extraneous_phis, and look specifically for virtuals. + (rewrite_out_of_ssa): Eliminate virtual PHI nodes before building + partitions. + +2003-11-27 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa-ccp.c (get_strlen): Mark the visited variables. + (ccp_fold_builtin): Changed due to changed calling convention of + get_strlen. + +2003-11-26 Diego Novillo <dnovillo@redhat.com> + + Revert + + 2003-11-25 Jeff law <law@redhat.com> + + * Makefile.in (OBJS-common): Add tree-phinodes.o. + (tree-phinodes.o): Add dependencies. + * tree-phinodes.c: New file. + * tree-dfa.c (create_phi_node): Moved to tree-phinodes.o. + (add_phi_arg, remove_phi_arg, remove_phi_arg_num): Similarly. + (remove_phi_node, remove_all_phi_nodes_for): Similarly. + * tree-ssa.c (init_tree_ssa): Initialize PHI node management. + (delete_tree_ssa): Finalize PHI node management. + * tree.c (dump_tree_statistics): Dump PHI node stats. + (make_phi_node, resize_phi_node): Moved to tree-phinodes.o. + * tree.h (init_phinodes): Prototype. + (fini_phinodes, release_phi_node): Likewise. + (phinodes_print_statistics): Likewise. + +2003-11-25 Jan Hubicka <jh@suse.cz> + + * tree-mustalias.c (promote_var): Do not clear + may_point_to_global_mem. + +2003-11-25 Jeff law <law@redhat.com> + + * domwalk.c (walk_dominator_tree): Indicate to the block local + data initializer if the block local data is new or recycled. + * domwalk.h (struct dom_walk_data): Corresponding changes. + * tree-ssa-dom.c (dom_opt_initialize_block_local_data): Accept and use + "recycled" argument. For recycled structures, only clear varrays + that have been initialized. For new blocks, do not initialize + varrays here. + (dom_opt_finalize_block): When threading across edges, if the + true/false varrays have not been initialized, then the limit is zero. + Only clear block local varrays that have been initialized. + (record_equivalences_from_incoming_edge): If necessary, initialize + block local const_and_copies. + (dom_opt_walk_stmts): If necessary, initialize block local + stmts_to_rescan. + (record_var_is_nonzero): If necessary, initialize block local + nonzero_vars. + (record_cond_is_true): If necessary, initialize block local + true_exprs. + (record_cond_is_false): If necessary, initialize block local + false_exprs. + (lookup_avail_expr): If necessary, initialize block local + avail_exprs. + (record_range): If necessary, initialize block local vrp_varaibles. + * tree-ssa.c + * tree-ssa.c (rewrite_initialize_block_local_data): Accept and use + "recycled" argument. For recycled structures, only clear varrays + that have been initialized. For new blocks, do not initialize + varrays here. + (rewrite_finalize_block): Only clear block local varrays that have + been initialized. + (register_new_def): If necessary, initialize block local defs. + + * tree-ssa-dom.c (get_eq_expr_value): Return a struct rather than + a tree node. + (record_equivalences_from_incoming_edge): Corresponding changes. + (find_equivalent_equality_comparison): Use tree_int_cst_XXX rather + then building and folding nodes. + (simplify_cond_and_lookup_avail_expr): Likewise. + + * Makefile.in (OBJS-common): Add tree-phinodes.o. + (tree-phinodes.o): Add dependencies. + * tree-phinodes.c: New file. + * tree-dfa.c (create_phi_node): Moved to tree-phinodes.o. + (add_phi_arg, remove_phi_arg, remove_phi_arg_num): Similarly. + (remove_phi_node, remove_all_phi_nodes_for): Similarly. + * tree-ssa.c (init_tree_ssa): Initialize PHI node management. + (delete_tree_ssa): Finalize PHI node management. + * tree.c (dump_tree_statistics): Dump PHI node stats. + (make_phi_node, resize_phi_node): Moved to tree-phinodes.o. + * tree.h (init_phinodes): Prototype. + (fini_phinodes, release_phi_node): Likewise. + (phinodes_print_statistics): Likewise. + +2003-11-25 Jan Hubicka <jh@suse.cz> + + * tree-inline.c (save_body): New body + * tree-inline.h (save_body): Declare. + * tree-optimize.c (tree_rest_of_compilation): Save function tree + properly. + +2003-11-24 Richard Henderson <rth@redhat.com> + + * gimplify.c (canonicalize_addr_expr): New. + (gimplify_conversion): Use it. Canonicalize after nop cast removal. + * tree-simple.c (is_gimple_min_invariant): Remove STRING_CST cast + special case. + +2003-11-24 Jeff Law <law@redhat.com> + + * flow.c (count_or_remove_death_notes_bb): New. Extracted from + count_or_remove_death_notes. + (count_or_remove_death_notes): Use EXECUTE_IF_SET_IN_SBITMAP. + +2003-11-24 Richard Henderson <rth@redhat.com> + + PR 13174, PR 13143 + * gimplify.c (cpt_same_type): Allow different ARRAY_TYPEs with + the same base type. + +2003-11-24 Daniel Berlin <dberlin@dberlin.org> + + Fix PR/13163 + * tree-ssa-pre.c (append_eref_to_block): Delete. + (insert_euse_in_preorder_dt_order_1): Ditto. + (insert_one_operand): Take an extra argument, because + avdefs may need to be changed. + (clear_all_eref_arrays): Use FOR_ALL_BB. + (insert_occ_in_preorder_dt_order): Stop appending to bb eref arrays. + Use FOR_ALL_BB. + (insert_euse_in_preorder_dt_order): Rewrite to just build a new varray + with only the EPHI's and EUSE's, and then sort it. + (pre_expression): Don't use bb based erefs array when printing + expressions. + (split_critical_edges): Just use FOR_ALL_BB. + (tree_perform_ssapre): Pre-split entry block successor edge if the + successor block has multiple preds. + + * tree-flow.h (struct bb_ann_d): Remove erefs varray. + +2003-11-24 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg.c (cleanup_tree_cfg): FOR_EACH_BB -> FOR_ALL_BB when + clearing dom children, because the entry block has dom_children + too. + * tree-ssa.c (build_dominator_tree): Ditto. + +2003-11-24 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (compute_dominance_frontiers_1, + compute_dominance_frontiers): Move from ssa.c. + * tree-flow.h (compute_dominance_frontiers): Declare. + * Makefile.in (tree-ssa.o, tree-ssa-live.o, tree-ssa-pre.o, + tree-optimize.o): Don't depend on ssa.h. + * tree-ssa.c: Don't include ssa.h. + * tree-ssa-live.c: Likewise. + * tree-ssa-pre.c: Likewise. + * tree-optimize.c: Likewise. + +2003-11-24 Jan Hubicka <jh@suse.cz> + + * fold-const.c (fold): Do not return early when + optimizing COMPONENT_REF and constant. + +2003-11-24 Richard Henderson <rth@redhat.com> + + * objc/objc-act.c (build_protocol_expr): Use convert instead of + smashing TREE_TYPE. + +2003-11-23 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-live.h (SSANORM_PERFORM_TER, SSANORM_COMBINE_TEMPS, + SSANORM_REMOVE_ALL_PHIS): New flag macros. + * tree-ssa.c (replace_variable): Return true if var was rewritten. + (eliminate_extraneous_phis): Dump var map to file if checking triggers + an abort. + (rewrite_trees): Set modified_stmt if stmt was changed. + (remove_ssa_form): Move more of rewrite_out_of_ssa to make it serve + all the same functions based on new flags in tree-ssa-live.h. + (rewrite_out_of_ssa): Call remove_ssa_form. + +2003-11-23 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (tree_verify_flow_info): Check that ENTRY/EXIT block + has no instructions associated with it. + +2003-11-22 Jeff Law <law@redhat.com> + + * tree-ssa-names.c (release_ssa_name): Use SSA_NAME_IN_FREE_LIST + instead of checking SSA_NAME_DEF_STMT being null. + * tree.h (SSA_NAME_DEF_STMT): Use chain field rather than the + def_stmt field. + (SSA_NAME_OCCURS_IN_ABNORMAL_PHI): Use existing flag from tree_common. + (SSA_NAME_IN_FREE_LIST): Define. + (struct tree_ssa_name): Kill DEF_STMT and OCCURS_IN_ABNORMAL_PHI fields. + +2003-11-22 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-pretty-print.c (dump_generic_node): Remove superfluous ';'. + +2003-11-22 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (simple-break-elim.o): Remove. + (simple-goto-elim.o): Remove. + (tree-dchain.o): Remove. + * simple-break-elim.c: Remove. + * simple-goto-elim.c: Remove. + * tree-dchain.c: Remove. + * tree-dchain.h: Remove. + +2003-11-22 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (build_dfs_id_array_1): > should be >= + (build_dfn_array): Ditto. + +2003-11-21 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-dfa.o): Add dependency on $(TREE_DUMP_H) + * tree-dfa.c: Include tree-dump.h + (compute_alias_sets): Call dump_function_to_file. + (may_access_global_mem_p): Check if the base address of _REF nodes + may point to global memory. + + * cfgcleanup.c (try_crossjump_to_edge): Initialize newpos1 and + newpos2. + +2003-11-21 Jeff Law <law@redhat.com> + + Revert: + + 2003-11-21 Jan Hubicka <jh@suse.cz> + + * tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR. + * tree-must-alias.c (tree_compute_must_alias): promote pointers. + (find_addressable_vars): Deal with complex constant + expressions; do not clear may_point_to_global_mem. + +2003-11-21 Jeff Law <law@redhat.com> + + * Makefile.in (domwalk.o): Depend on $(GGC_H). + * domwalk.c: Include ggc.h. + (walk_dominator_tree): Manage allocation/deallocation and + pushing/popping of the toplevel block data pointer here. + Use callback to initialize the block local data. + (init_walk_dominator_tree): New function. + (fini_walk_dominator_tree): Likewise. + * domwalk.h (struct dom_walk_data): Add callback to initialize + block local data. Add field for sizeof block local data. + Add "private" field free_block_data. + (init_dominator_tree, fini_dominator_tree): Prototype. + * tree-ssa-dom.c (dom_opt_initialize_local_data): New function. + (tree_ssa_dominator_optimize_1): Initialize new fields in the + dominator walker structure. Initialize and finalize the dominator + walker. Slightly reorder code to make it more readable.. + (dom_opt_initialize_block): No longer deal with allocation and + initialization of block local data. + (dom_opt_finalize_block): Similarly for deallocation of block + local data. + * tree-ssa.c (rewrite_block_data): New structure. + (rewrite_initialize_block_local_data): New function. + (rewrite_initialize_block): No longer deal with allocation and + initialization of block local data. + (rewrite_into_ssa): Initialize new fields in the dominator walker + structure. Initialize and finalize the dominator walker. + (rewrite_initialize_block): No longer deal with allocation and + initialization of block local data. + (rewrite_optimize_stmts): Deal with changes in the dominator + walker structure. + (rewrite_finalize_block): No longer with deallocation of block + local data. + + * tree-dfa.c (add_vdef, cleanup_voperand_arrays): Use NUM_VDEFS. + (mark_new_vars_to_rename, collect_dfa_status_r): Likewise. + * tree-pretty-print.c (dump_vops): Likewise. + * tree-sra.c (create_scalar_copies): Likewise. + * tree-ssa-dce.c (stmt_useful_p, process_worklist): Likewise. + * tree-ssa-live.c (create_ssa_var_map): Likewise. + (calculate_live_on_entry): Likewise. + * tree-ssa-pre.c (process_left_occs_and_kills): Likewise. + * tree-ssa.c (mark_def_sites, rewrite_stmt): Likewise. + * tree.h (NUM_VDEFS): Define. + * tree-ssa-ccp.c (visit_stmt): Use NUM_VDEFS. Fix thinko in last + change. + (initialize): Use NUM_VDEFS. + + * tree-dfa.c (add_vdef): Revamp to handle new method for + recording vdefs. + (cleanup_operand_arrays): Similarly. + * tree-sra.c (create_scalar_copies): Similarly. + * tree-ssa-ccp.c (visit_stmt, initialize): Similarly. + * tree-ssa-dce.c (stmt_useful_p, process_worklist): Similarly. + * tree-ssa-dom.c (cprop_into_stmt): Similarly. + (record_equivalences_from_stmt): Similarly. + * tree-ssa-live.c (create_ssa_var_map): Similarly. + (calculate_live_on_entry): Similarly. + * tree-ssa.c (mark_def_sites, rewrite_stmt): Similarly. + * tree-ssa-pre.c (process_left_occr_and_kills): Similarly. + * tree-inline.c (estimate_num_insns_1): Kill VDEF_EXPR. + * tree-pretty-print.c (dump_generic_node) Kill VDEF_EXPR. + (dump_vops): Dump VDEFs here. + * tree.c (build_vdef_expr): Kill. + * tree.h (build_vdef_expr): Kill prototype. + (VDEF_RESULT, VDEF_OP): Revamp to handle new method for recording + vdefs. + * tree.def (VDEF_EXPR): Kill. + + * tree-cfg.c (cfg_remove_useless_stmts): Set both VAR and VAL to + NULL anytime one of them is determined to be invalid. + +2003-11-21 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-live.c (compact_var_map): Fix typo. Clear correct field. + (calculate_live_on_entry): Remove unneeded stmt. + * tree-ssa-live.h (version_to_var): New. Return variable associated + with a specific SSA version. + * tree-ssa.c (eliminate_build): Add check that ignored results don't + have important arguments. Allow ignored results. + (coalesce_abnormal_edges): Allow non-relevant results to be ignored. + (eliminate_extraneous_phis): Allow non-relevant results. Check that + no important arguments are being missed. + (coalesce_vars): Non-partition variables are allowed now, just ignored. + (rewrite_trees): New. Split out from rewrite_out_of_ssa. Perform tree + rewriting step. + (remove_ssa_form): New. Allow rewriting of just specified variables. + (rewrite_out_of_ssa): Use rewrite_trees and reorganize slightly to + accommodate typechecking in eliminate_extraneous_phis. + +2003-11-21 Jan Hubicka <jh@suse.cz> + + * tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR. + * tree-must-alias.c (tree_compute_must_alias): promote pointers. + (find_addressable_vars): Deal with complex constant expressions; + do not clear may_point_to_global_mem. + +2003-11-21 Jan Hubicka <jh@suse.cz> + + * parser.c (cp_parser_postfix_expression): Initialize 's' to + NULL_TREE. + +2003-11-20 Richard Henderson <rth@redhat.com> + + * Makefile.in (bitmap.o-warn, caller-save.o-warn, combine.o-warn, + cgraphunit.o-warn, c-semantics.o-warn, emit-rtl.o-warn, expr.o-warn, + fold-const.o-warn, genattrtab.o-warn, regmove.o-warn, tree.o-warn, + varasm.o-warn, f/expr.o-warn, profile.o-warn): Remove. + * bitmap.c (bitmap_first_set_bit): Abort if no non-zero word found. + (bitmap_last_set_bit): Likewise. + * combine.c (get_pos_from_mask): Always set *plen. + +2003-11-20 Richard Henderson <rth@redhat.com> + + * tree-dfa.c (get_expr_operands): Remove handling of PLUS_EXPR + inside INDIRECT_REF. + +2003-11-20 Diego Novillo <dnovillo@redhat.com> + + * tree-nomudflap.c (nogo): Fix prototype. + +2003-11-20 Richard Henderson <rth@redhat.com> + + * except.c (output_function_exception_table): Strip nops. + * gimplify.c (gimplify_addr_expr): Kill missing cast workaround. + (cpt_same_type, check_pointer_types_r): New. + (gimplify_body): Call it. + * tree-inline.c (insert_decl_map): New. + (remap_decl, remap_type, remap_block, copy_body_r, + initialize_inlined_parameters, declare_return_variable, + remap_save_expr, mark_local_for_remap_r): Use it. + +2003-11-20 Frank Ch. Eigler <fche@redhat.com> + + libstdc++/11696 + * c-pragma.c (handle_pragma_redefine_extname): Define always. + (init_pragma): Activate #pragma redefine_extname for mudflap. + + * tree-inline.c (copy_tree_r): Propagate mf_marked-ness. + * tree-mudflap.c (mudflap_c_function): Break into new + _decls and _ops functions. + (mudflap_c_function_decls): Avoid unnecessary tree copying. + (mudflap_c_function_ops): Ditto. Gimplify explicitly only for + tree dumping. + * tree-nomudflap.c: Add new stub functions. Simplify error + message emission throughout. + * tree-mudflap.h: Corresponding changes. + * tree-optimize.c (tree_rest_of_compilation): Call the _decl + instrumentation before gimplification and ssa optimizations; + call the _ops instrumentation after ssa optimizations. + +2003-11-20 Diego Novillo <dnovillo@redhat.com> + + Initial fix for PR optimization/12747 + + * Makefile.in (OBJS): Add tree-sra.o + * common.opt (ftree-sra): Add. + * flags.h (flag_tree_sra): Declare. + * gimplify.c (gimplify_addr_expr): Set TREE_INVARIANT + when producing and address expression for a DECL node. + * opts.c (decode_options): Enable SRA at -O1. + (common_handle_option): Handle -ftree-sra. + * timevar.def (TV_TREE_SRA): New timer. + * toplev.c (flag_tree_sra): Define. + * tree-cfg.c (stmt_ends_bb_p): Declare extern. + (bsi_replace): Add boolean argument to specify whether to + preserve EH region information. Update all callers. + (bsi_commit_edge_inserts): Also check the edge from ENTRY_BLOCK_PTR + to basic block 0. + Move loop body ... + (bsi_commit_edge_inserts_1): ... here. + * tree-dump.c: Add dump for SRA pass. + * tree.h (enum tree_dump_index): Modify accordingly. + (STRIP_USELESS_TYPE_CONVERSION): Define. Update all callers to + tree_ssa_useless_type_conversion. + * tree-eh.c (add_stmt_to_eh_region): New function. + * tree-flow.h (stmt_ends_bb_p): Declare. + (add_stmt_to_eh_region): Declare. + (tree_sra): Declare. + (enum bsi_iterator_update): Mirror entries in + enum tsi_iterator_update. + * tree-optimize.c (optimize_function_tree): Call SRA pass + after must-alias. + * tree-sra.c: New file. + * doc/invoke.texi: Document -ftree-sra and -fdump-tree-sra. + +2003-11-20 Andrew Macleod <amacleod@redhat.com> + + * tree-ssa.c (check_replaceable): Return false if the LHS is a + DECL_HARD_REGISTER. + +2003-11-20 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (set_rhs): Replace with an empty statement when + the replacement has no side effects. + +2003-11-20 Jeff Law <law@redhat.com> + + * Makefile.in (OBJS-common): Kill tree-ssa-copyprop.o. + (tree-ssa-copyprop.o): Kill dependencies clause. + * common.opt (tree-copyprop): Kill option. + * flags.h (flag_tree_copyprop): Kill. + * opts.c (decode_options): Don't set flag_tree_copyprop. + (common_handle_option): Kill handling of -ftree-copyprop. + * timevar.def (TV_TREE_COPYPROP): Kill. + * toplev.c (flag_tree_copyprop): Kill. + (lang_independent_options): Kill -ftree-copyprop. + * tree-dump.c (dump_files): Kill .copyprop dump. + * tree-flow.h (tree_ssa_copyprop): Kill prototype. + (propagate_copy): Move prototype. + * tree-optimize.c (optimize_function_tree): Kill -ftree-copyprop stuff. + * tree.h (tree_dump_index): Kill TDI_copyprop. + * tree-ssa-copyprop.c: Kill. + * tree-ssa-dom.c (propagate_copy): Moved here from tree-ssa-copyprop.c. + + * tree-ssanames.c (free_ssanames): No longer a varray. + (init_ssanames, make_ssa_name, release_ssa_name): Corresponding changes. + +2003-11-20 Steven Bosscher <stevenb@suse.de> + + * tree-ssanames.c (ssanames_print_statistics): Use ISO function + declaration. Print unsigned ints, not usinged longs. + +2003-11-18 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (rename_1): This should be static. + (append_eref_to_block): Don't gc allocate. + (clear_all_eref_arrays): Free the array rather than + clear them. + (rename_1): Ditto on both counts. + (free_expr_info): Free the arrays. + (collect_expressions): Don't gc allocate the arrays. + +2003-11-18 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (insert_one_operand): Handle self-referential + ephi's properly. + +2003-11-19 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (true_exprs, false_exprs): New hash tables. + (nonzero_vars): New varray. + (dom_walk_block_data): Add true_exprs, false_exprs and nonzero_vars. + (get_value_for, set_value_for): Accept additional argument indicating + which table to use. Callers updated. + (tree_ssa_dominator_optimize_1): Initialize and wipe our new hash + tables and varray appropriately. + (dom_opt_initialize_block): Initialize new block local varrays for + true expressions, false expressions and nonzero vars. Update call + to record_equivalences_from_incoming_edge. + (dom_opt_finalize_block): Put equivalences from taken edges + into the true_exprs and false_exprs hash tables. Restore global + state for true_exprs, false_exprs and nonzero_vars too. + (record_equivalences_from_incoming_edge): Accept dom_walk structure + instead of a gazillion varrays. Pass down block local + true_exprs, false_exprs and nonzero_vars varrays to various children. + (optimize_stmt): Accept block local nonzero_vars argument. Pass + new varrays down to record_equivalences_from_stmt. + (thread_jumps_walk_stmt): Pass new varrays down to + record_equivalences_from_stmt. + (dom_opt_walk_stmt): Pass new varrays down to optimize_stmt. + (dump_dominator_optimizer_statistics): Dump new hash tables. + (record_cond_is_true, record_cond_is_false): Record info into + the true/false hash tables/varrays instead of the main expression + varrays. Don't create useless tree nodes. + (record_var_is_nonzero): New function. + (record_equivalences_from_stmt): Don't generate useless tree nodes. + (lookup_avail_expr): Consult nonzero_vars and the true/false + expression tables as well. + (get_eq_expr_value): Record local true/false expressions in the + local true/false varrays rather than the main local expression + varray. + (true_false_expr_hash, true_false_expr_eq): New functions. + + * Makefile.in (OBJS-sommon): Add tree-ssanames.o. + (tree-ssanames.o): Add dependencies. + * tree-dfa.c (remove_phi_node): Release SSA_NAME expression when + we remove the PHI node. + (remove_all_phi_nodes_for): Similarly. + * tree-ssa.c (prepare_operand_for_rename): Similarly when we + strip away an SSA_NAME expression from an operand. + (init_tree_ssa): Call the SSA_NAME initializer. + (delete_tree_ssa): Call the SSA_NAME finalizer. + * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Clear the + const_and_copies and vrp_data virtual arrays. + * tree-ssanames.c: New file for management of SSA_NAME expressions. + * tree.h: Prototypes for functions exported by tree-ssanames.c. + * tree-flow.h, tree-ssa-ccp.c, tree-ssa-dce.c: Use highest_ssa_version + rather than next_ssa_version. + * tree-ssa-dom.c, tree-ssa-live.c, tree-ssa.c: Similarly. + * tree.c (dump_tree_statistics): Call into tree-ssaname statistics + dumper too. + (make_ssa_name): Kill. Now in tree-ssanames.c + +2003-11-18 Richard Henderson <rth@redhat.com> + + * tree.c (recompute_tree_invarant_for_addr_expr): Split out from ... + (build1): ... here. + * tree.h: Declare it. + * gimplify.c (gimplify_addr_expr): Use it. + * tree-ssa-ccp.c (maybe_fold_offset_to_array_ref): Split out + from fold_indirect_refs_r. + (maybe_fold_stmt_indirect): Likewise. + (maybe_fold_offset_to_component_ref): New. + (maybe_fold_stmt_plus): New. + (fold_stmt_r): Rename from fold_indirect_refs_r. + (fold_stmt): Strip more useless type conversions. + +2003-11-18 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (dump_function_to_file): Mind when cfun is null. + +2003-11-18 Diego Novillo <dnovillo@redhat.com> + + Revert + + 2003-11-18 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (cfg_remove_useless_stmts_bb): Avoid crash. + * tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR. + + 2003-11-18 Jan Hubicka <jh@suse.cz> + + * Makefile.in (sibcall.o): Kill. + (tree-tailcall.o): Add except.h dependency + * sibcall.c: Kill. + (purge_reg_equiv_notes, purge_mem_unchanging_flag): Move to ... + * calls.c (purge_reg_equiv_notes, + purge_mem_unchanging_flag) ... here. + (expand_call): Do not produce placeholders; do + not deal with tail recursion; update + equivalencies after sibcall production. + * toplev.c (rest_of_handle_sibling_calls): Kill. + (rest_of_compialtion): Do not use rest_of_handle_sibling_calls. + * tree-dump.c (dump_files): Add tail2 + * tree-flow.h (tree_optimize_tail_calls): Update prototype. + * tree-optimize.c (optimize_function_tree): Do + tail optimization twice. + * tree-tailcall.c: Inlucde except.h + (suitable_for_tail_call_opt_p): New. + (optimize_tail_call): Add opt_tailcalls argument; + optimize tailcalls. + (tree_optimize_tail_calls): Add opt_tailcalls/pass arguments. + * tree.h (CALL_EXPR_TAILCALL): New. + (tree_dump_index): Add tail2 + +2003-11-18 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (cfg_remove_useless_stmts_bb): Avoid crash. + * tree-dfa.c (get_expr_operands): Fix handling of CALL_EXPR. + +2003-11-18 Diego Novillo <dnovillo@redhat.com> + + * tree-optimize.c (optimize_function_tree): Disable tail + call optimizations. + +2003-11-18 Jan Hubicka <jh@suse.cz> + + * Makefile.in (sibcall.o): Kill. + (tree-tailcall.o): Add except.h dependency + * sibcall.c: Kill. + (purge_reg_equiv_notes, purge_mem_unchanging_flag): Move to ... + * calls.c (purge_reg_equiv_notes, purge_mem_unchanging_flag) ... here. + (expand_call): Do not produce placeholders; do not deal with tail + recursion; update equivalencies after sibcall production. + * toplev.c (rest_of_handle_sibling_calls): Kill. + (rest_of_compialtion): Do not use rest_of_handle_sibling_calls. + * tree-dump.c (dump_files): Add tail2 + * tree-flow.h (tree_optimize_tail_calls): Update prototype. + * tree-optimize.c (optimize_function_tree): Do tail optimization twice. + * tree-tailcall.c: Inlucde except.h + (suitable_for_tail_call_opt_p): New. + (optimize_tail_call): Add opt_tailcalls argument; optimize tailcalls. + (tree_optimize_tail_calls): Add opt_tailcalls/pass arguments. + * tree.h (CALL_EXPR_TAILCALL): New. + (tree_dump_index): Add tail2 + +2003-11-18 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (thread_across_edge): Lose block_avail_exprs argument. + Callers updated. Pass NULL for block_avail_exprs in call to + lookup_avail_expr. Record both the condition and the inverted + condition when threading across an edge. + +2003-11-18 Richard Henderson <rth@redhat.com> + + * tree-ssa.c (tree_ssa_useless_type_conversion): Use TYPE_MAIN_VARIANT + when compariing pointer types too. + +2003-11-18 Jan Hubicka <jh@suse.cz> + + * tree-dump.c (dump_files): Reorder tail calls. + * tree-optimize.c (optimize_function_tree): Likewise + * tree-tailcall.c (optimize_tail_call, eliminate_tail_call): Remove + variable tmpvars; update SSA. + (suitable_for_tail_opt_p): Do not give up because of static variables. + (find_tail_calls): Track return values in SSA graph. + * tree.c (make-phi_node): Do not create new SSA name when operand + already is. + * tree.h (enum tree_dump_index): Reorder tail call. + +2003-11-17 Diego Novillo <dnovillo@redhat.com> + + * gimplify.c (gimplify_call_expr): Change gimple_test_f argument to + return bool type. + (mark_decls_volatile_r): New local function. + (gimplify_expr): Make gimple_test_f return bool type. + Call mark_decls_volatile_r when gimplifying VA_ARG_EXPR. + * tree-dfa.c (struct walk_state): Remove field is_va_arg_expr. + Update all callers. + (opf_force_vop): Remove. Update all users. + (add_stmt_operand): Re-structure to add real operands only for + GIMPLE register variables. + (find_vars_r): Don't handle VA_ARG_EXPR nodes. + (add_referenced_var): Also assign a UID to variables with hidden + uses. + Call is_gimple_call_clobbered to determine if a variable is call + clobbered. + (get_memory_tag_for): Mark memory tags volatile and static. + * tree-flow.h (struct var_ann_d): Remove field is_in_va_arg_expr. + Update all users. + * tree-simple.c (is_gimple_*): Change return type to bool. Update + all users. + (is_gimple_reg_type): Return true only for non aggregate types. + (is_gimple_non_addressable_1): New local function. + (is_gimple_reg): Call it. + (is_gimple_non_addressable): New function. + (is_gimple_call_clobbered): New function. + * tree-simple.h (is_gimple_*): Change return type to bool. + +2003-11-17 Jason Merrill <jason@redhat.com> + + PR c++/11266 + * gimplify.c (gimple_add_tmp_var): Also make sure + seen_in_bind_expr isn't set. + (mostly_copy_tree_r): Don't copy a TARGET_EXPR. + (gimplify_target_expr): Only expand a TARGET_EXPR the first time + we see it. + +2003-11-17 Richard Henderson <rth@redhat.com> + + * tree-pretty-print.c (dump_generic_node): Use %u not %x for + printing DECL_UID. + +2003-11-16 Richard Henderson <rth@redhat.com> + + * c-common.c (c_add_case_label): Use create_artificial_label. + * tree-simple.h (create_artificial_label): Move decl ... + * tree.h: ... here. + +2003-11-16 Richard Henderson <rth@redhat.com> + + PR c++/12770 + * gimple-low.c (lower_stmt_body): Take a tree, not a tree*. + (lower_stmt): Handle EH nodes. + (lower_bind_expr): Remove fixme. + (block_may_fallthru): Move from tree-eh.c. Handle COND_EXPR, + BIND_EXPR, and TRY_FINALLY_EXPR. + (lower_cond_expr): Use it. + * tree-eh.c (collect_finally_tree): Ignore COND_EXPR and BIND_EXPR. + (replace_goto_queue_cond_clause): New. + (replace_goto_queue_1): Use it. Split out statement_list handling. + (replace_goto_queue_stmt_list): New. + (-block_may_fallthru): Move to gimple-low.c. + (lower_eh_constructs_1): Ignore BIND_EXPR. + * tree-flow.h (block_may_fallthru): Declare. + + * tree-dump.c (dump_files): Exchange .eh and .lower passes. + * tree-optimize.c (tree_rest_of_compilation): Likewise. + * tree.h (enum tree_dump_index): Likewise. + +2003-11-16 Jason Merrill <jason@redhat.com> + + * gimplify.c (mostly_copy_tree_r): Don't walk into a BLOCK. + + * tree-inline.c (walk_tree): Don't walk into the BIND_EXPR_VARS + of a BIND_EXPR. + * c-common.c (c_walk_subtrees): Don't walk into the decl of a + DECL_STMT. + + PR optimization/11269 + * dwarf2out.c (gen_subprogram_die): Generate a DIE for a named + return value. + (loc_descriptor_from_tree): Treat RESULT_DECL like VAR_DECL. + (add_location_or_const_value_attribute): Likewise. + (add_bound_info): Likewise. + (gen_decl_die): Likewise. + +2003-11-16 Jason Merrill <jason@redhat.com> + + * c-pretty-print.c (debug_c_tree): Restore removed fn. + * diagnostic.h: Declare it. + + * tree-pretty-print.c (dump_generic_node): Use DECL_UID when + dumping anonymous decls. + +2003-11-16 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (last_and_only_stmt): New. + * tree-flow.h (last_and_only_stmt): Declare. + * tree-ssa-dom.c (thread_across_edge): Use it. + + * tree-cfg.c (tree_block_forwards_to): Don't check for empty stmts. + (tree_forwarder_block_p): Likewise. + * tree-dfa.c (get_stmt_operands): Likewise. + * tree-ssa-ccp.c (set_rhs): Likewise. + * tree-ssa-dom.c (optimize_stmt): Likewise. + * tree-ssa.c (rewrite_stmt): Likewise. + +2003-11-16 Richard Henderson <rth@redhat.com> + + * tree.h (LABEL_DECL_UID): Rename from LABEL_DECL_INDEX. + * tree-flow.h (bsi_remove): Declare. + * tree-flow-inline.h (bsi_remove): Move ... + * tree-cfg.c (set_bb_for_stmt): Don't re-set LABEL_DECL_UID. + Verify that a label isn't already in a block before adding it. + (bsi_remove): Move from tree-flow-inline.h, clear bb. + * tree-pretty-print.c (dump_generic_node): Use LABEL_DECL_UID if set. + +2003-11-15 Richard Henderson <rth@redhat.com> + + * function.c (clear_block_marks): Rename from reorder_blocks_0, export. + * function.h (clear_block_marks): Declare. + * gimple-low.c (lower_function_body): Use it. + (lower_bind_expr): Ensure we don't link blocks into the tree twice. + * gimplify.c (gimplify_body): Keep old bind_expr at top level if + possible. + +2003-11-14 Richard Henderson <rth@redhat.com> + + * tree-ssa-pre.c (split_critical_edges): Reimplement. Call + tree_split_edge directly. + +2003-11-14 Jason Merrill <jason@redhat.com> + + * tree-eh.c (do_return_redirection): Assign directly to the + RESULT_DECL of a function which returns in memory. + +2003-11-14 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (pre_stats): Add ephis_current member. + (create_ephi_node): Use xmalloc, not ggc_alloc_tree. + (clear_all_eref_arrays): Free the ephis here. + (expr_phi_insertion): Don't append the ephis to the erefs array. + (insert_occ_in_preorder_dt_order): Move building/freeing of dfn + array so that it only occurs once per function.. + (rename_1): Ditto on the dfs_id array. + (ephi_use_pool): New alloc pool. + (add_ephi_use): Pool allocate these things, rather than + ggc_alloc'ing them. + (insert_euse_in_preorder_dt_order_1): Use ephi_at_block to put the + ephi in the list. + (pre_expression): Don't PRE when we only have 1 occurrence. + (expr_lexically_eq): Make inline. + (names_match_p): Move closer to first use. + (tree_perform_ssapre): Alloc and free the ephi_use_pool. + Make stat printing per-expression. + Add checking that we freed all ephis. + +2003-11-14 Andrew MacLeod <amacleod@redhat.com> + + * common.opt (ftree-ter): Document new option. + * flags.h (flag_tree_ter): Add new flag. + * fold-const.c (invert_truthvalue): Don't ignore cast to BOOLEAN_TYPE. + * opts.c (decode_options): Option -ftree-ter defaults to on. + (common_handle_option): Add processing for flag_tree_ter. + * toplev.c (flag_tree_ter): Initialize to 0. + (lang_independent_options f_): Add -ftree-ter flag. + * tree-ssa-live.c (init_var_map): Initialize ref_count to 0. + (delete_var_map): Free ref count if allocated. + (register_ssa_partition): Add "is_use" parameter for reference counting. + (create_ssa_var_map): Add flag and code for calculating ref counts. + * tree-ssa-live.h (struct _var_map): Add ref_count field. + (SSA_VAR_MAP_REF_COUNT): Define flag. + (version_ref_count): Function to retreive ref_count. + * tree-ssa.c (replace_variable): If an expression vector is passed in, + use replacement expression instead of mapped variable when available. + (struct value_expr_d): New structure for value lists. + (struct temp_expr_table_d): Structure used to build an expression + replacement table. + (new_temp_expr_table): New. Create a new TER (Temporary Expression + Replacement) table. + (free_temp_expr_table): New. Free a TER table. + (new_value_expr): New. Allocate a value list element. + (free_value_expr): New. Free a value list element. + (find_value_in_list): New. Find a value in a list. + (add_value_to_list): New. Add a value to a list if not already present. + (remove_value_from_list): New. Remove a value from a list. + (add_dependance): New. Add a dependency to an expression. + (check_replaceable): New. Check if a stmt is a candidate for TER. Add + to active list and create dependancies if so. + (finish_expr): New. Remove an expression from TER consideration. + (mark_replaceable): New. Finish a TER expression as a valid replacement. + (kill_expr): New. Finish dependent TER expressions as not replaceable. + (kill_virtual_exprs): New. Finish any TER expressions dependent on a + virtual operand as not replaceable. + (find_replaceable_in_bb): New. Process a basic block for TER expression. + (find_replaceable_exprs): New. Entry point for TER expression finder. + (dump_replaceable_exprs): New. output list of replaceable expressions. + (rewrite_out_of_ssa): Build TER table if requested, and use it. + +2003-11-14 Andreas Jaeger <aj@suse.de> + + * c-semantics.c (find_reachable_label): Use C90 function + declaration. + +2003-11-14 Jason Merrill <jason@redhat.com> + + PR middle-end/12526 + * tree-cfg.c (call_expr_flags): Move to calls.c. + * tree-flow.h: Move prototype to tree.h. + + PR c++/13033 + * c-simplify.c (gimplify_c_loop): Wrap the increment in a + CLEANUP_POINT_EXPR. + + * tree-dfa.c (get_stmt_operands) <ASM_EXPR>: A memory clobber + clobbers all call-clobbered variables. Clobber clobber. + + * gimplify.c (canonicalize_component_ref): Remove redundant call + to recalculate_side_effects. + +2003-11-14 Richard Henderson <rth@redhat.com> + + PR c++/12751 + * tree-eh.c (struct leh_tf_state): Add outer. + (lower_try_finally, lower_cleanup): Set it. + (lower_try_finally_fallthru_label): New. + (honor_protect_cleanup_actions): Use it. + (lower_try_finally_copy, lower_try_finally_switch): Likewise. + + * tree-eh.c (collect_finally_tree): Complete manual tailrecurse + transformation. + +2003-11-14 Richard Henderson <rth@redhat.com> + + * gimplify.c (voidify_wrapper_expr): Don't clobber TREE_TYPE of + statements in a STATEMENT_LIST. Be prepared for an empty list. + +2003-11-14 Steven Bosscher <stevenb@suse.de> + + * jump.c (never_reached_warning): Remove function. + * rtl.h (never_reached_warning): Don't declare it. + * cfgrtl.c (never_reached_warning): Don't call it. + * cse.c (never_reached_warning): Ditto. + +2003-11-13 Jeff Law <law@redhat.com> + + * tree-cfg.c (bsi_replace): Restore accidentally removed code. + + * tree-cfg.c (cfg_remove_useless_stmts_bb): Also detect useless + var->var copies created by the out-of-ssa translation. + +2003-11-13 Steven Bosscher <stevenb@suse.de> + + PR middle-end/11514 + * tree-inline.c (walk_tree): Handle PLACEHOLDER_EXPR. + +2003-11-13 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (cfg_remove_useless_stmts_bb): Initialize stmt. + +2003-11-13 Jan Hubicka <jh@suse.cz> + + * calls.c (special_function_p): Do not check for ECF_MALLOC. + (flags_from_decl_or_type): Use special_function_p. + (expand_call): Remove call to special_function_p. + * tree-cfg.c (notice_special_calls, clear_special_calls): New functions. + (remove_useless_stmts): Use clear_special_calls. + (remove_useless_stmts_1): Use notice_special_calls. + * tree-flow.h (notice_special_calls, clear_special_calls): New functions. + * tree-ssa-dce.c (remove_dead_stmts): Use clear_special_calls and + notice_special_calls.. + + * gimplify.c (gimplify_expr): Check labels. + + * tree-cfg.c (tree_verify_flow_info): Check labels. + + * tree-cfg.c (make_exit_edges): Do not create edges for const + functions. + (update_call_expr_flags): Fix. + +2003-11-12 Diego Novillo <dnovillo@redhat.com> + + (declare_inlined_vars): New local function. + (initialize_inlined_parameters): Call it. + (expand_call_inline): Call it. + +2003-11-13 Steven Bosscher <stevenb@suse.de> + + PR optimization/12640 + * tree-ssa-ccp.c (get_strlen): Don't follow the UD chain + of a PHI argument if the DEF stmt for the argument is + the PHI itself. + +2003-11-12 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + Jeff Law <law@redhat.com> + + * tree-cfg.c (cfg_remove_useless_stmts): New function. + (cfg_remove_useless_stmts_bb): Likewise. + * tree-flow.h (cfg_remove_useless_stmts): Prototype. + * tree-ssa.c (rewrite_out_of_ssa): Use cfg_remove_useless_stmts + instead of remove_useless_stmts. + +2003-11-12 Richard Henderson <rth@redhat.com> + + * Makefile.in (OBJS-common): Add tree-iterator.o. + (expr.o): Depend on tree-iterator.h. + (GTFILES): Add tree-iterator.c. + * basic-block.h (struct basic_block_def): Replace head_tree_p + and end_tree_p with stmt_list. + (tree_bb_root): New. + (create_bb): Don't declare. + * c-common.c (c_warn_unused_result): Handle STATEMENT_LIST. + * c-simplify.c (c_gimplify_stmt): Don't rationalize_compound_expr. + * cfg.c (entry_exit_blocks): Adjust for member changes. + (compact_blocks): Manage tree_bb_root. + * expr.c (expand_expr_1): Handle STATEMENT_LIST. + * gimple-low.c: Update for tree_stmt_iterator changes. + (lower_cond_expr): Use expr_only. Notice empty conditionals. + * gimplify.c (append_to_statement_list_1): Create and + manage statement_list nodes. + (foreach_stmt): Remove. + (wfl_locus): Remove. + (annotate_all_with_locus_1): Merge into... + (annotate_all_with_locus): ... here. Iterate over the + statement list directly. + (voidify_wrapper_expr): Handle STATEMENT_LIST. + (gimplify_return_expr): Likewise. + (gimplify_loop_expr): Likewise. + (shortcut_cond_r, shortcut_cond_expr): Likewise. + (gimplify_cleanup_point_expr): Likewise. + (gimple_build_eh_filter): Create statement list bodies. + (gimplify_bind_expr): Likewise. + (gimplify_switch_expr): Likewise. + (gimplify_cond_expr): Likewise. + (gimplify_compound_expr): Handle void expressions as well. + (gimplify_statement_list): New. + (gimple_push_cleanup): Gimplify the WITH_CLEANUP_EXPR operand. + (gimplify_stmt): Ensure non-null result. + (gimplify_to_stmt_list): New. + (gimplify_expr): Use gimplify_compound_expr, gimplify_statement_list, + gimplify_to_stmt_list as appropriate. + (gimplify_body): Fix creation of outer BIND_EXPR. + * tree-cfg.c (tree_bb_root): New. + (build_tree_cfg): Initialize it. Update for make_blocks changes. + (factor_computed_gotos): Use create_bb directly. + (make_blocks): Rewrite to use statement lists. + (append_stmt_to_bb, prepend_stmt_to_bb): Remove. + (create_bb): Make static. Add stmt_list argument. Don't allow + null after argument. Set tree_bb_root. + (make_edges): ENTRY block successor is FALLTHRU. + (remove_useless_stmts_warn_notreached): Handle STATEMENT_LIST. + (struct rus_data): Add last_goto. + (remove_useless_stmts_cond): Clear it. Zap empty conditionals. + Use expr_only for simple statment elimination. + (remove_useless_stmts_tf): Clear last_goto. Use TREE_SIDE_EFFECTS + instead of IS_EMPTY_STMT. Use append_to_statement_list instead of + munging to COMPOUND_EXPR. + (remove_useless_stmts_tc): Clear last_goto. Use TREE_SIDE_EFFECTS. + (remove_useless_stmts_goto): Set last_goto. + (remove_useless_stmts_label): New. Kill goto-next-label. + (remove_useless_stmts_1): Reorg to handle STATEMENT_LIST. + (remove_bb): Simplify block removal. + (remove_bsi_from_block): Kill. + (tree_block_forwards_to): Tidy bsi loops. Do not create + block label here. + (tree_cfg2dot): Update for bb->stmt_list. + (delete_tree_cfg): Clear tree_bb_root. + (set_bb_for_stmt): Handle STATEMENT_LISTs. + (bsi_insert_before, bsi_insert_after): Re-implement on TSIs. + (bsi_move_after, bsi_move_before, bsi_move_to_bb_end): Likewise. + (bsi_replace): Likewise. + (tree_find_edge_insert_loc): New, split from ... + (bsi_insert_on_edge_immediate): ... here. + (bsi_commit_edge_inserts): Use it. Add all stmts at once. + (bsi_insert_on_edge): Use statement lists. + (tree_split_edge): Position new block correctly. Deal with + fallthrough to EXIT. + (tree_verify_flow_info): Do not check block order vs statement chain. + (tree_make_forwarder_block): Update create_bb call, fix edge flags. + (thread_jumps): Call tree_redirect_edge_and_branch directly. + (tree_block_label): Don't return a NONLOCAL_LABEL. + (tree_redirect_edge_and_branch_1): Rename from s/_1//. Take an + argument to use ssa_redirect_edge or redirect_edge_succ. Use + tree_split_edge instead of bsi_insert_on_edge_immediate. + (tree_redirect_edge_and_branch): New. + (remove_stmt, first_exec_stmt, bsi_init, bsi_next_in_bb): Kill. + (bsi_start, bsi_last, bsi_prev, bsi_from_tsi): Kill. + (bsi_update_from_tsi, bsi_link_after): Kill. + * tree-eh.c (collect_finally_tree): Handle STATEMENT_LIST. + (replace_goto_queue_1): Likewise. + (replace_goto_queue): Don't use walk_tree. + (do_return_redirection): Create statement lists. + (do_goto_redirection): Likewise. + (block_may_fallthru_last): Fold into... + (block_may_fallthru): ... here. + (frob_into_branch_around): Use append_to_statement_list. + (honor_protect_cleanup_actions): Likewise. + (lower_try_finally_nofallthru): Likewise. + (lower_try_finally_onedest): Likewise. + (lower_try_finally_copy): Likewise. + (lower_try_finally_switch): Likewise. + (lower_try_finally): Likewise. + (lower_catch): Likewise. + (lower_eh_filter): Likewise. + (lower_eh_constructs_1): Handle STATEMENT_LIST. + * tree-flow-inline.h (BSI_NUM_ELEMENTS, bsi_list_p): Remove. + (new_bsi_list, empty_bsi_stack, FOR_EACH_BSI_IN_REVERSE): Remove. + (FOR_EACH_STMT_IN_REVERSE): Remove. + (bsi_start, bsi_last, bsi_end_p): Re-implement based on TSIs. + (bsi_next, bsi_prev, bsi_stmt, bsi_stmt_ptr, bsi_remove): Likewise. + * tree-flow.h (block_stmt_iterator): Likewise. + * tree-inline.c (copy_statement_list): New. + (copy_body_r): Use it, and append_to_statement_list. + (initialize_inlined_parameters): Use append_to_statement_list. + (expand_call_inline): Likewise. + (gimple_expand_calls_inline): New. + (expand_calls_inline): Use it. + (walk_tree, unsave_r): Handle STATEMENT_LIST. + (add_stmt_to_compound): Remove. + * tree-iterator.c: New file. + * tree-iterator.h: Re-implement based on STATEMENT_LIST. + * tree-mudflap.c (mf_decl_cache_locals): Don't + rationalize_compound_expr. + * tree-optimize.c (optimize_function_tree): Make static. + Rechain statements from blocks before deleting the cfg. + * tree-pretty-print.c (dump_generic_node): Handle STATEMENT_LIST, + update for change in tree_stmt_iterator wrt COMPOUND_EXPR. + (dump_generic_node): Dump lowered COND_EXPR on a single line. + * tree-simple.c (is_gimple_stmt): Handle STATEMENT_LIST. + * tree-simple.h (foreach_stmt_fn, foreach_stmt): Remove. + (gimplify_to_stmt_list): Declare. + (alloc_stmt_list, free_stmt_list): Declare. + * tree-ssa-dce.c (should_remove_dead_stmt): Rename from + remove_dead_stmt; return bool if statement should be removed. + (remove_dead_stmts): Update to match. + * tree-ssa-live.c (build_tree_conflict_graph): Don't use + FOR_EACH_STMT_IN_REVERSE. + * tree-ssa-pre.c (reaching_def): Tidy BSI usage. + (insert_one_operand, collect_expressions): Likewise. + * tree.c (tree_size): Handle STATEMENT_LIST. + (copy_node): Abort on STATEMENT_LIST. + (expr_first, expr_last): Move to tree-iterator.c. + (expr_length): Remove. + (tree_node_structure): Handle STATEMENT_LIST. + (tsi_link_before, tsi_link_after, tsi_delink): Move to tree-iterator.c. + (tsi_link_chain_before, tsi_link_chain_after): Merge into non-chain. + (tsi_new_stmt_list, tsi_stmt_list_head, body_is_empty): Kill. + * tree.def (STATEMENT_LIST): New. + * tree.h (STATEMENT_LIST_HEAD, STATEMENT_LIST_TAIL): New. + (struct tree_statement_list_node): New. + (struct tree_statement_list): New. + (enum tree_node_structure_enum): Add TS_STATEMENT_LIST. + (union tree_node): Add stmt_list. + (expr_length): Remove. + (expr_only): New. + (add_to_compound_expr, body_is_empty): Remove. + (optimize_function_tree): Remove. + +2003-11-12 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-flow.h (remove_useless_vars): Declare. + (expand_var_p): Declaration removed. + * tree-ssa.c (rewrite_out_of_ssa): Call remove_useless_vars. + * tree-cfg.c (dump_function_to_file): Update dumping of variables. + * gimple-low.c (expand_var_p): Made static. + (remove_useless_vars): New. + (expand_used_vars): Expand all variables in the + cfun->unexpanded_var_list. + +2003-11-11 Richard Henderson <rth@redhat.com> + + * c-common.c (c_gimplify_stmt): Fix botched removal of + rationalize_compound_expr calls. + + * c-semantics.c (build_stmt): Set TREE_SIDE_EFFECTS. + * c-simplify.c (c_gimplify_stmt): Return a gimplify_status; + mind the status from subroutines to avoid re-gimplification. + (c_build_bind_expr): Do not call gimplify_stmt. + (gimplify_c_loop): Don't create a loop_expr; fully gimplify. + (gimplify_block, gimplify_cleanup, gimplify_expr_stmt, + gimplify_for_stmt, gimplify_while_stmt, gimplify_do_stmt, + gimplify_if_stmt, gimplify_switch_stmt, gimplify_return_stmt, + gimplify_decl_stmt, gimplify_compound_literal_expr, + gimplify_stmt_expr): Return a gimplify_status. In most cases, + don't do local gimplification of sub-structures. + (gimplify_decl_stmt): Use append_to_compound_expr when we care + about the result value. + (gimplify_stmt_expr): Use append_to_statement_list_force and + re-gimplify so that voidify_wrapper_expr can work. + (finish_bc_block): Don't append to a non-list. + (c_gimplify_expr): Pass back the gimplify_status of subroutines. + * c-common.h (c_gimplify_stmt): Update decl. + * gimplify.c (append_to_statement_list_1): Make sure list_p is + never null after call. + (append_to_compound_expr): New. + * tree-simple.h (append_to_compound_expr): Declare. + +2003-11-11 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_addr_expr): Clear, not copy, TREE_SIDE_EFFECTS. + +2003-11-11 Richard Henderson <rth@redhat.com> + + PR c/13014 + * c-simplify.c (gimplify_if_stmt): Remove short circuit. + * tree-cfg.c (struct rus_data): Add has_label. + (remove_useless_stmts_warn_notreached): New. + (remove_useless_stmts_cond): Warn for deleted conditionals. + (remove_useless_stmts_tc): Warn for deleted catches. + (remove_useless_stmts_1): Set has_label. + +2003-11-11 Jan Hubicka <jh@suse.cz> + + * gimplify.c (gimplify_call_expr): Unset side effects for + pure functions too. + * tree-cfg.c (update-call_expr_flags): New function. + (remove_useless_stmts_and_vars_1): Use it. + (is_ctrl_altering_stmt): Pure/const calls never alter the CFG. + * tree-ssa-dce.c (stmt_useful_p): Check side effects flag + on call exprs. + +2003-11-11 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (has_label_p): New function. + (tree_verify_flow_info): New checks. + * tree-optimize.c (optimize_function_tree): Call verify_flow_info + before de-SSA. + +2003-11-11 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (struct rus_data): Rename from rusv_data. + Remove remove_unused_vars. + (remove_useless_stmts*): Rename from remove_useless_stmts_and_vars*. + (remove_useless_stmts_bind): Do not remove dead variables. + (remove_useless_stmts): Kill remove_unused_vars argument. + * tree-flow.h (remove_useless_stmts): Update. + * tree-optimize.c (tree_rest_of_compilation): Update call. + * tree-ssa.c (rewrite_out_of_ssa): Likewise. + +2003-11-11 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + Diego Novillo <dnovillo@redhat.com> + + * basic-block.h (brief_dump_cfg): Declare. + * cfg.c (dump_cfg_bb_info, brief_dump_cfg): New. + * diagnostic.h (dump_generic_node): Declaration changed. + (print_generic_stmt_indented): Declare. + * gimple-low.c (expand_var_p): New. + (expand_used_vars): Use it. + * tree-cfg.c (struct cfg_stats_d): Remove num_failed_bind_expr_merges + field. + (remove_bb): Only dump whole block with TDF_DETAILS. + (tree_dump_bb): Use dump_generic_bb. + (dump_tree_cfg): Use brief_dump_cfg and dump_function_to_file. + (dump_cfg_function_to_file): Merged into dump_function_to_file, + removed. + (dump_cfg_stats): Do not dump cfg_stats.num_failed_bind_expr_merges. + (dump_function_to_file): Moved from tree-dump.c, merged with + dump_cfg_function_to_file. + * tree-dump.c (dump_function_to_file): Removed. + * tree-flow.h (dump_cfg_function_to_file): Declaration removed. + (dump_generic_bb, expand_var_p): Declare. + * tree-must-alias.c (tree_compute_must_alias): Replace + dump_cfg_function_to_file by dump_function_to_file. + * tree-ssa-ccp.c (tree_ssa_ccp): Ditto. + * tree-ssa-copyprop.c (tree_ssa_copyprop): Ditto. + * tree-ssa-dce.c (tree_ssa_dce): Ditto. + * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Ditto. + * tree-ssa-pre.c (tree_perform_ssapre): Ditto. + * tree-ssa.c (rewrite_into_ssa, rewrite_out_of_ssa): Ditto. + * tree-tailcall.c (tree_optimize_tail_calls): Ditto. + * tree-pretty-print.c (print_declaration, print_generic_decl): Don't + use flags argument, change spacing. + (dump_block_info): Removed. + (dump_generic_bb_buff, dump_generic_bb, print_generic_stmt_indented, + dump_bb_header, dump_bb_end, dump_phi_nodes): New functions. + (dump_vops): Change spacing, don't dump phi nodes. + (do_niy, print_generic_stmt, print_generic_expr, print_declaration, + print_struct_decl, print_call_name): Add argument to + the dump_generic_node calls. + (last_bb): Removed. + (dump_generic_node): Print semicolons at end of statements correctly. + Don't print bb related stuff. + (maybe_init_pretty_print): Don't initialize last_bb. + * tree-ssa.c (rewrite_out_of_ssa): Do not allow virtual operands to + be shown in the .optimized dump. + +2003-11-11 Daniel Berlin <dberlin@dberlin.org> + + PR optimization/12936 + * tree-ssa-pre.c (expr_phi_insertion): Remove unused code that was + causing ICE's for VA_ARG_EXPR. + +2003-11-10 Richard Henderson <rth@redhat.com> + + * gimple-low.c (lower_function_body): Lower bind_expr in place. + (lower_stmt): Only incr for stmts we're skipping. + (lower_cond_expr): Detect empty if. + +2003-11-10 Steven Bosscher <stevenb@suse.de> + + * toplev.c (rest_of_decl_compilation): Use the location of the + declaration for error messages. + +2003-11-10 Richard Henderson <rth@redhat.com> + + * gimplify.c (add_stmt_to_compound, add_tree): Remove. + (append_to_statement_list_1, append_to_statement_list): New. + (append_to_statement_list_force): New. + (gimplify_loop_expr): Take pre_p. + (gimplify_expr): Provide it. + * tree-simple.h: Update. + + * c-simplify.c: Replace add_tree with append_to_statement_list. + * gimplify.c, tree-mudflap.c: Likewise. + +2003-11-10 Richard Henderson <rth@redhat.com> + + * c-common.c (c_warn_unused_result): Restructure to use iterator + on COMPOUND_EXPR only. + +2003-11-09 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (tree_verify_flow_info): Fix checking of order of basic + blocks over code. + +2003-11-09 Richard Henderson <rth@redhat.com> + + * basic-block.h (struct edge_def): Turn insns into a union. + * cfgrtl.c (insert_insn_on_edge): Update to match. + (commit_one_edge_insertion, commit_edge_insertions): Likewise. + (commit_edge_insertions_watch_calls): Likewise. + * gcse.c (reg_killed_on_edge, bypass_block): Likewise. + * profile.c (instrument_edges): Likewise. + * rtlanal.c (hoist_insn_to_edge): Likewise. + * tree-cfg.c (PENDING_STMT): Likewise. + (SET_PENDING_STMT): Remove. + (bsi_commit_edge_inserts): Update to match. + +2003-11-08 Jan Hubicka <jh@suse.cz> + + * fold.c (nondestructive_fold_binary_to_constant): Fix typo. + * fold-const.c (fold_relational_const): Check for side effects. + +2003-11-07 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * basic-block.h (create_bb): Declaration changed. + * tree-cfg.c (create_bb): Enable creating a block on specified place. + (make_blocks, tree_split_edge, tree_make_forwarder_block): Use it. + (tree_verify_flow_info): Check bbs are in the correct order. + + * tree-cfg.c (find_unreachable_blocks): Remove now incorrect comments. + + * tree-ssa.c (rewrite_out_of_ssa): Don't remove annotations from + statements before the final dump. + +2003-11-07 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-tailcall.c (struct tailcall): New. + (bb_optimize_tail_calls, find_tail_call_p): Removed. + (eliminate_tail_call): Get the tailcall from the struct tailcall. + (optimize_tail_call, find_tail_calls): New. + (tree_optimize_tail_calls): Use them. + +2003-11-07 Jan Hubicka <jh@suse.cz> + + * gimple-low.c (simple_goto_p): Move to... + * tree-cfg.c: (simple_goto_p): ... here; + (nonlocal_goto_p): New. + (is_computed_goto): Rename to ... + (computed_goto_p): ... this; make global. + (factor_computed_gotos, make_blocks): Update calls. + (make_ctrl_stmt_edges): Add edge for nonlocal labels; use new functions. + * tree-flow.h (is_coputed_goto): Kill. + (nonlocal_goto_p, simple_goto_p, computed_goto_p): Declare. + * tree-ssa-ccp (visit_stmt): Update. + +2003-11-07 Jan Hubicka <jh@suse.cz> + + * fold-const.c (tree_expr_nonzero_p): Fix typo. + + * fold-const.c (tree_expr_nonzero_p): New function. + (fold_relational_const): Use it. + (nondestructive_fold_binary_to_constant): Allow casts in address + expressions. + +2003-11-06 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (tree_block_label): Cleanup. + +2003-11-06 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (fast_a_dominates_b): New function. + (build_dfs_id_array_1): Ditto. + (build_dfs_id_array): Ditto. + (load_modified_phi_result): Use fast_a_dominates_b. + (rename_1): Ditto. + Also use build_dfs_id_array, and remove some duplicate ephi_at_block + calls. + (insert_occ_in_preorder_dt_order): Remove some duplicate ephi_at_block + calls. + (pre_expression): Ditto. + Also free dfs_id arrays here. + (collect_expressions): Remove duplicate bsi_stmt calls. + +2003-11-06 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (count_stmts_in_bb): Removed. + (set_var_phis): Only call bb_for_stmt once. + (insert_one_operand): Remove endtree, endtreep, a lot of special handling + no longer needed. Remove insert_done. + (collect_expressions): Enable INDIRECT_REF and SSA_NAME handling. + +2003-11-06 Steven Bosscher <stevenb@suse.de> + + * tree-cfg.c (STRIP_CONTAINERS): Remove. + +2003-11-06 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (cleanup_cond_expr_graph): Clean edge flags. + +2003-11-06 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-dump.c (dump_options): Remove TDF_LINENO from all setting. + +2003-11-06 Jan Hubicka <jh@suse.cz> + + * builtins.c (expand_builtin_strstr, expand_builtin_strchr, + expand_builtin_strrchr, expand_builtin_strpbrk, + simplify_builtin_strstr, simplify_builtin_strrchr, + simplify_builtin_strpbrk): Add missing casts. + +2003-11-05 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * diagnostic.h (print_generic_decl): Declare. + * tree-cfg.c (dump_cfg_function_to_file): Dump variables in + unexpanded_var_list. + * tree-pretty-print.c (print_generic_decl): New function. + +2003-11-05 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * Makefile.in (gimplify.o): Add function.h dependency. + * c-call-graph.c (construct_call_graph): Modify build_tree_cfg call. + * gimple-low.c (record_vars): Export. + (lower_function_body): Remove the topmost BIND_EXPR. + * gimplify.c: Include function.h. + (gimple_add_tmp_var): Record temporaries in the + cfun->unexpanded_vars_list if available. + * tree-cfg.c (build_tree_cfg): Work without the topmost BIND_EXPR. + (dump_cfg_function_to_file): New. + (dump_tree_cfg): Use dump_cfg_function_to_file. + * tree-dump.c (dump_function_to_file): Work without the topmost + BIND_EXPR. + * tree-flow.h (build_tree_cfg): Declaration changed. + (dump_cfg_function_to_file, record_vars): Declare. + * tree-optimize.c (optimize_function_tree, tree_rest_of_compilation): + Work without the topmost BIND_EXPR. + * tree-must-alias.c (tree_compute_must_alias): Use + dump_cfg_function_to_file. + * tree-ssa-ccp.c (tree_ssa_ccp): Ditto. + * tree-ssa-copyprop.c (tree_ssa_copyprop): Ditto. + * tree-ssa-dce.c (tree_ssa_dce): Ditto. + * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Ditto. + * tree-ssa-pre.c (tree_perform_ssapre): Ditto. + * tree-ssa.c (rewrite_into_ssa, rewrite_out_of_ssa): Ditto. + * tree-tailcall.c (tree_optimize_tail_calls): Ditto. + * tree.h (optimize_function_tree): Declaration changed. + +2003-11-03 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (handle_bb_creation): Removed. + (redo_dominators): Removed. + (insert_one_operand): Remove code to handle bb creation, since all + critical edges are now pre-split. + (finalize_2): Remove redo_dominators related code. + (pre_expression): Return 1 if we exited early because nothing happened. + (split_critical_edges): Do fake variable assignments instead, because + it works. return true if we actually split an edge. + (tree_perform_ssapre): Remove redo_dominators code. + +2003-11-03 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * function.h (struct function): New field unexpanded_var_list. + * gimple-low.c (unexpanded_var_list): Removed. + (record_vars, expand_used_vars): Use cfun->unexpanded_var_list. + * tree-flow.h (unexpanded_var_list): Declaration removed. + + * gimplify.c (should_carry_locus_p): New. + (annotate_all_with_locus_1): Use it. Do not annotate empty + statements. + +2003-11-03 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (tree_try_redirect_by_replacing_jump): Do not use + succesor_block. + +2003-11-03 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-pretty-print.c (dump_block_info): Add flags parameter. + Only show line number when asked to. + (dump_generic_node): Pass flags to dump_block_info. + +2003-11-03 Jan Hubicka <jh@suse.cz> + + * cfghooks.h (redirect_edge_and_branch hook): Make it return edge. + * cfgrtl.c (cfg_layout_redirect_edge_and_branch, + rtl_redirect_edge_and_branch, try_redirect_by_replacing_jump): + Update to new interface. + * tree-cfg.c (tree_cfg_hooks): Move to end of file; set + redirect_edge_and_branch and redirect_edge_and_branch_force. + (thread_jumps): Use redirect_edge_and_branch. + (tree_block_label): new; break out of thread_edge. + (tree_try_redirect_by_replacing_jump): New. + (thread_edge): Rename to tree_redirect_edge_and_branch; deal sanely + with unusual edges; preserve profile. + (tree_redirect_edge_and_branch_force): New. + * tree-flow.h (ssa_redirect_edge): Declare. + * tree-ssa.dom.c (tree_ssa_dominator_optimize): Use redirect_edge_and_branch. + * tree-ssa.c (ssa_redirect_edge): New. + +2003-11-03 Jeff Law <law@redhat.com> + + * domwalk.h (struct dom_walk_data): New field "global_data". + * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): Initialize new + "global_data" field. + * tree-flow.h (enum need_phi_state): New enumeration. + (var_ann_d): Add bitfield for need_phi_state. + * tree-ssa.c (mark_def_sites_global_data): New structure to hold + global data for mark_def_sites dominator walk. + (mark_def_sites): Revamp to be called via the dominator walker. + (set_def_block): Update need_phi_state for the variable as needed. + (set_livein_block): Similarly. + (rewrite_into_ssa): Use dominator walker to call mark_def_sites. + Delay freeing dominance info. Kill "globals" bitmap. + (insert_phi_nodes): No longer need "globals" bitmap. Use + need_phi_state in variable's annotation to determine if a PHI + may be needed. + + * tree-ssa-dom.c (dom_opt_finalize_block): Try to thread across the + edges leaving COND_EXPR nodes which are leafs in the dominator + tree. + (record_equivalences_from_incoming_edge): Do not set EQ_EXPR_VALUE + unless the block's single predecessor contains parent_block_last_stmt. + +2003-11-03 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-dump.c (dump_options): Add TDF_LINENO. + * tree-pretty-print.c (dump_generic_node): Print line number for + statements if asked to. + * tree.h (TDF_LINENO): New. + * doc/invoke.texi (lineno): Document. + +2003-11-03 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * expr.c (expand_vars, expand_var): Split of ... + (expand_expr_1): ... here. + * expr.h (expand_var): Declare. + * gimple-low.c (lower_function_body, lower_stmt, lower_bind_expr): + Eliminate BIND_EXPRs. + (expand_used_vars): New. + * tree-alias-common.c (create_alias_vars): Walk variables in blocks. + * tree-cfg.c (make_bind_expr_blocks): Removed. + (make_blocks, build_tree_cfg, factor_computed_gotos): Don't handle + BIND_EXPRs. + (assign_vars_to_scope, successor_block, NEXT_BLOCK_LINK): Removed. + (make_edges, make_exit_edges): Don't use successor_block. + (remove_useless_stmts_and_vars_goto): Don't expect NEXT_BLOCK_LINK + to be set. + (bsi_init, bsi_next_in_bb, bsi_from_tsi): Don't handle BIND_EXPRs. + (replace_stmt): Don't create BIND_EXPRs. + * tree-flow.h (struct var_ann_d): Removed field scope. + (struct stmt_ann_d): Removed fields scope and scope_level. + (propagate_copy): Declaration changed. + (fixup_var_scope): Removed. + * tree-must-alias.c (tree_compute_must_alias): Consider DECL_NONLOCAL + vars call clobbered. + * tree-optimize.c (tree_rest_of_compilation): Call expand_used_vars. + * tree-ssa-copyprop.c (move_var_to_scope, fixup_var_scope): Removed. + (copyprop_stmt): Call to propagate_copy changed. + (propagate_copy): Don't update scope. + * tree-ssa-dom.c (cprop_into_stmt): Call to propagate_copy changed. + (eliminate_redundant_computations): Don't call fixup_var_scope. + * tree-ssa.c (insert_copy_on_edge): Don't update scope. + +2003-11-02 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-inline.c (walk_tree): Tail recursion optimized for + COMPOUND_EXPRs. + * tree-eh.c (collect_finally_tree): Ditto. + +2003-11-02 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-optimize.c (optimize_function_tree): Removed duplicate call of + lower_function_body. Moved call of reset_block_changes ... + (tree_rest_of_compilation) ... here. Reset the scope to top before + expanding function end. + +2003-11-01 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * basic-block.h (BB_CONTROL_STRUCTURE): Removed. + * tree-cfg.c (struct cfg_stats_d): Field num_merged_cases removed. + (make_blocks, make_bind_expr_blocks, append_stmt_to_bb, bsi_link_after, + build_tree_cfg, factor_computed_gotos, prepend_stmt_to_bb, + remove_stmt, replace_stmt): Don't set parent. + (set_parent_stmt, add_stmt_to_bb, find_contained_blocks, + blocks_unreachable_p, remove_blocks, remove_unreachable_block, + move_outgoing_edges, merge_tree_blocks, remap_stmts): Removed. + (REMOVE_ALL_STMTS, REMOVE_NO_STMTS, REMOVE_NON_CONTROL_STRUCTS, + REMOVE_CONTROL_STRUCTS): Removed. + (remove_bb): Code to handle control structures removed. + (tree_block_forwards_to): Don't stop due to CASE_LABEL_EXPRs. + (tree_dump_bb): Don't print parent. Print only BIND_EXPRs in slim + form. + (dump_tree_cfg): Don't count merged case labels. + (is_ctrl_structure): Removed. + (stmt_starts_bb_p): Don't handle CASE_LABEL_EXPRs. + (tree_verify_flow_info): Don't check BB_CONTROL_STRUCTURE. + * tree-flow-inline.h (parent_block, parent_stmt): Removed. + * tree-flow.h (struct stmt_ann_d): Remove parent_stmt field. + (parent_stmt, parent_block, is_ctrl_structure): Declarations removed. + * tree-pretty-print.c (dump_generic_node): Don't handle lowered + COND_EXPRs specially. + * tree-ssa-ccp.c (visit_stmt): Don't check is_ctrl_structure. + +2003-10-31 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (record_equivalences_from_stmt): Restore lost code + to create equivalences from BIT_IOR_EXPR. + + * tree-ssa-dom.c (thread_jumps_walk_stmts): Go ahead and optimize + a COND_EXPR with a compile-time constant condition. + +2003-10-31 Diego Novillo <dnovillo@redhat.com> + + * tree-optimize.c (optimize_function_tree): Fix comment + describing SSA pass after DOM2. + +2003-10-31 Diego Novillo <dnovillo@redhat.com> + + Fix PR optimization/12825 + * tree-optimize.c (optimize_function_tree): Run SSA renamer after + second DOM pass. + +2003-10-30 Richard Henderson <rth@redhat.com> + + * c-common.c (match_case_to_enum_1, match_case_to_enum): New. + (c_do_switch_warnings): New. + * c-common.h (c_do_switch_warnings): Declare. + * c-typeck.c (c_finish_case): Call it. + * stmt.c (all_cases_count, BITARRAY_TEST, BITARRAY_SET, + mark_seen_cases, check_for_full_enumeration_handling): Remove. + (expand_end_case_type): Don't do warn_switch handling. + * expr.h, tree.h: Remove dead decls. + + * c-simplify.c (gimplify_switch_stmt): Force switch body non-null. + +2003-10-30 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (thread_jumps): Allow SWITCH_EXPR. + (thread_edge): Handle it. Tidy surrounding code. + +2003-10-30 Richard Henderson <rth@redhat.com> + + * domwalk.c (walk_dominator_tree): Pass any final is_ctrl_stmt + down the recursive walk. + +2003-10-30 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (thread_across_edge): Renamed from + thread_through_successor. Revamp to thread the destination of an edge + rather than the successors of a block. + (dom_opt_finalize_block): Corresponding changes. Do not bother calling + thread_across_edge unless we are at a leaf in the dominator tree. + + * tree-cfg.c (thread_jumps): Now returns a bool. Move some tests into + tree_forwarder_block_p. Improve comments. + (cleanup_control_flow): Now returns a bool indicating if anything was + changed. + (thread_unconditional_jumps): Kill. + (cleanup_tree_cfg): Repeat cascading cleanups until nothing changes. + (tree_forwarder_block_p): Check forwardable bit in the block's + annotation to avoid useless work. Mark blocks as not forwardable as + appropriate. Verify destination is not the exit block here. Do not + consider successors of the entry block as forwarders. Ignore empty + statements when walking through the block's statements. Verify target + block is not the start of a case label and that we can safely insert + a label at the target block. + +2003-10-29 Richard Henderson <rth@redhat.com> + + * c-common.c (c_warn_unused_result): Remove lowered containers. + * c-semantics.c (genrtl_case_label): Update add_case_node call. + * c-simplify.c (gimplify_switch_stmt): Build SWITCH_EXPR and + gimplify it simultaneously with the body. + * expr.c (expand_expr_1): Handle SWITCH_BODY clear and + SWITCH_LABELS set. Update add_case_node calls. + * gimple-low.c (lower_stmt): Don't do anything for SWITCH_EXPR. + (lower_switch_expr, lower_case_label_expr): Remove. + * gimplify.c (gimplify_switch_expr): Zap SWITCH_BODY after + gimplification. Force default entry for SWITCH_LABELS. + (gimplify_case_label_expr): Rename from gimple_add_case_label. + Assert switch in scope; lower to LABEL_EXPR. + * stmt.c (pushcase, pushcase_range) Update add_case_node calls. + (add_case_node): Add dont_expand_label argument. + (same_case_target_p): Don't search rtl. + * tree-cfg.c (enum find_location_action): Remove. + (make_switch_expr_blocks): Remove. + (make_blocks): Update. + (make_case_label_edges): Remove. + (make_edges): Update. + (find_contained_blocks): Remove lowered containers. + (make_switch_expr_edges): New. + (make_ctrl_stmt_edges): Call it. + (make_cond_expr_edges): Use label_to_block. + (remove_useless_stmts_and_vars_1): Don't go into SWITCH_BODY. + (remove_unreachable_block): Remove SWITCH_EXPR special case. + (cleanup_cond_expr_graph): Tidy. + (cleanup_switch_expr_graph): Rewrite. + (disconnect_unreachable_case_labels): Remove. + (find_taken_edge_cond_expr): Use integer_zerop/integer_nonzerop. + (find_taken_edge_switch_expr): Rewrite. + (value_matches_some_label): Remove. + (find_case_label_for_value): New. + (is_ctrl_structure): Remove lowered containers. + (is_ctrl_stmt): Add SWITCH_EXPR. + (switch_parent): Remove. + (handle_switch_fallthru): Remove. + (handle_switch_split): Remove. + (find_insert_location): Merge into ... + (bsi_insert_on_edge_immediate): ... here. Simplify. + (tree_split_edge): Don't set EDGE_FALLTHRU. + * tree-eh.c (collect_finally_tree): Remove lowered containers. + (replace_goto_queue_1, block_may_fallthru_last): Likewise. + (lower_eh_constructs_1): Likewise. + (verify_norecord_switch_expr): New. + (lower_try_finally_switch): Generate lowered switches. + * tree-inline.c (expand_calls_inline): Don't search null SWITCH_BODY. + * tree-pretty-print.c (dump_generic_node): Do something sensible + with lowered switch_expr. + * tree-ssa-dom.c (record_equivalences_from_incoming_edge): Update + for lowered switch_expr. + * tree.def (SWITCH_EXPR): Update docs. + * tree.h (add_case_node): Update decl. + +2003-10-29 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (n_phi_preds): New variable. + (generate_vops_as_of_bb): New function + (generate_expr_as_of_bb): Remove unused first argument. Update all + callers. + (subst_phis): Add boundary check for the phi_pred_cache array. + (same_e_version_phi_result): Once modified, no point in continuing + the loop. + (finalize_2): ESSA Minimization can crash if we ended up with new + BB's + +2003-10-29 Richard Henderson <rth@redhat.com> + + * tree-eh.c (do_return_redirection): Don't move copy to RESULT_DECL + outside the RETURN_EXPR. Introduce a new temporary as needed. + +2003-10-26 Richard Henderson <rth@redhat.com> + + * gimplify.c (keep_function_tree_in_gimple_form): Remove. + (gimplify_function_tree): Return void. Remove hack for + language not supporting gimple. + * tree.h: Update decls. + * langhooks-def.h (LANG_HOOKS_GIMPLE_BEFORE_INLINING): New. + * langhooks.h (struct lang_hooks): Add gimple_before_inlining. + * tree-inline.c (copy_body_r): Check that instead of + keep_function_tree_in_gimple_form. + (initialize_inlined_parameters): Likewise. + (expand_call_inline, expand_calls_inline): Likewise. + + * explow.c (probe_stack_range): Never emit loop notes. + * expr.c (emit_block_move_via_loop): Likewise. + * toplev.c (rest_of_compilation): Always synthesize loop notes. + +2003-10-26 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * Makefile.in (gimple-low.o): Add function.h dependency. + * gimple-low.c (struct lower_data): New field block. + (lower_function_body, lower_stmt, lower_bind_expr): Record + the block at statements. + * cfglayout.c (insn_locators_initialize): Use new info about + blocks. + * expr.c (expand_expr): Record block changes. + * function.c (blocks_nreverse): Export. + (uninitialized_vars_warning): Use DECL_RTL_SET_P to test for presence + of rtl. + (reset_block_changes, record_block_change, finalize_block_changes, + check_block_change, free_block_changes): New functions. + * function.h (struct function): New bitfield dont_emit_block_notes. + New field ib_boundaries_block. + (blocks_nreverse, reset_block_changes, record_block_change, + finalize_block_changes, check_block_change, free_block_changes): + Declare. + * sibcall.c (optimize_sibling_and_tail_recursive_call): Don't call + reorder_blocks when dont_emit_block_notes. + * stmt.c (expand_start_bindings_and_block, expand_end_bindings): + Don't emit block notes when dont_emit_block_notes. + * toplev.c (rest_of_compilation): Don't call reorder_blocks when + dont_emit_block_notes. + * tree.c (build1): Initialize TREE_BLOCK field. + * tree-flow.h (lower_function_body): Declare. + * tree-optimize.c: Include function.h. + (optimize_function_tree): Call lower_function_body. + * tree.h (struct tree_exp): Add block field. + (TREE_BLOCK): New macro. + +2003-10-26 Richard Henderson <rth@redhat.com> + + * tree.h (tree_dump_index): Add TDI_lower. + * tree-dump.c (dump_files): Add .lower entry. + * tree-optimize.c (optimize_function_tree): Move lower_function_body, + (tree_rest_of_compilation): here. Tidy .useless dump. + +2003-10-25 Jan Hubicka <jh@suse.cz> + + * c-common.c (c_estimate_num_insns_1): Kill. + (c_estimate_num_insns): Kill. + * c-common.h (c_estimate_num_insns): Kill. + * c-lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill. + * cp-lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill. + * objc-lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill. + * java/lang.c (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill. + (java_estimate_num_insns_1, java_estimate_num_insns): Kill. + * cgraphunit (cgraph_analyze_function): Use estimate_num_insns. + * tree-eh.c (decide_copy_try_finally): Likewise. + * tree-inline.c (limits_allow_inilining, optimize_inline_calls): Likewise. + (estimate_num_insns_1, estimate_num_insns): New functions. + * langhooks-def.h (LANG_HOOKS_TREE_INLINING_ESTIMATE_NUM_INSNS): Kill. + * langhooks.h (estimate_num_inssn): Kill. + * tree-inline.h (estimate_num_insns): Declare. + +2003-10-25 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * gimple-low.c: New. + * Makefile.in (gimple-low.o): Add. + * domwalk.c (walk_dominator_tree): Consider COND_EXPR a control + structure. + * tree-cfg.c (make_cond_expr_blocks, linearize_control_structures, + linearize_cond_expr): Removed. + (thread_jumps, tree_forwarder_block_p): New. + (merge_tree_blocks): Unused now. + (phi_alternatives_equal): Modified for use in jump threading. + (enum find_location_action): Remove EDGE_INSERT_LOCATION_NEW_ELSE. + (make_blocks): Don't call make_cond_expr_blocks. + (set_parent_stmt): Ensure we don't set COND_EXPR as a parent + statement. + (find_contained_blocks): Remove COND_EXPR alternative. + (make_cond_expr_edges): Handle lowered gotos. + (cleanup_tree_cfg): Don't call linearize_control_structures, + call thread_jumps and verify_flow_info and rerun cleanup_control_flow. + (remove_unreachable_block): Remove handling of structured COND_EXPRs. + (remove_bb): Fix warning for removed goto exprs. + (cleanup_control_flow, cleanup_cond_expr_graph, + cleanup_switch_expr_graph, find_taken_edge_cond_expr, + bsi_insert_before, find_insert_location, bsi_insert_on_edge_immediate): + Handle lowered COND_EXPRs. + (is_ctrl_structure): Remove COND_EXPR. + (is_ctrl_stmt): Add COND_EXPR. + (tree_verify_flow_info): Check validity of COND_EXPRs. + (thread_edge): Moved from tree-ssa-dom.c. + * tree-flow.h (cleanup_cond_expr_graph, cleanup_switch_expr_graph): + Declaration changed. + (thread_edge, lower_function_body): Declare. + * tree-optimize.c (optimize_function_tree): Call lower_function_body. + * tree-pretty-print.c (dump_generic_node): Dump lowered cond_exprs in + full. + * tree-ssa-copyprop.c (fixup_var_scope): Handle non-SSA_NAMEs. + * tree-ssa-dce.c (stmt_useful_p, process_worklist): Cleaned up when + COND_EXPRs are lowered. + * tree-ssa-dom.c (thread_edge): Moved to tree-cfg.c. + (tree_ssa_dominator_optimize_1): Dumps and setting of vars_to_rename + moved from thread_edge. + (optimize_stmt): Pass block iterator to cleanup_cond_expr_graph and + cleanup_switch_expr_graph. + * tree-ssa.c (insert_copy_on_edge): Fixup scope for emitted variables. + + * dominance.c (BB_NODE): Use VARRAY_GENERIC_PTR_NOGC. + (calculate_dominance_info): Use VARRAY_GENERIC_PTR_NOGC_INIT. + * varray.c (element): Add GENERIC_PTR_NOGC entry. + * varray.h (enum varray_data_enum): Add VARRAY_DATA_GENERIC_NOGC. + (union varray_data_tag): Add generic_nogc. + (VARRAY_GENERIC_PTR_NOGC_INIT, VARRAY_GENERIC_PTR_NOGC, + VARRAY_PUSH_GENERIC_PTR_NOGC, VARRAY_TOP_GENERIC_PTR_NOGC): New. + +2003-10-25 Jan Hubicka <jh@suse.cz> + + * cppcharset.c (one_utf8_to_utf32): Initialize 's' to silence warning. + +2003-10-25 Jan Hubicka <jh@suse.cz> + + * fold-const.c (nondestructive_fold_binary_to_constant): Realize that + (plus (address) (const_int)) is a constant. + +2003-10-25 Jan Hubicka <jh@suse.cz> + + * opts.c (decode_options): Uncomment unit-at-a-time setting + * params.def: Syncrhonize with manline. + * tree-inline.c (initialize_inlined_parameters): Set variable as + gimplified. + +2003-10-24 Steven Bosscher <steven@gcc.gnu.org> + + * gimplify.c (create_artificial_label): New function. + (build_and_jump): Use it. + * c-simplify.c (c_gimplify_stmt): Likewise. + (gimplify_condition): Likewise. + * tree-cfg.c (factor_computed_gotos, tree_block_forwards_to, + handle_switch_fallthru, handle_switch_split): Likewise. + * tree-ssa-dom.c (thread_edge): Likewise. + * tree-ssa-pre.c (split_critical_edges): Likewise. + * tree-tailcall.c (eliminate_tail_call): Likewise. + * tree-eh.c (frob_into_branch_around, + honor_protect_cleanup_actions, lower_try_finally_nofallthru, + lower_try_finally_onedest, lower_try_finally_copy, + lower_try_finally_switch, lower_catch, lower_eh_filter, + lower_cleanup): Likewise. + (make_label): Remove. + * tree-simple.h (create_artificial_label): Add prototype. + * tree-inline.c (expand_call_inline): Make return label for + inlined function artificial. + +2003-10-23 Jeff Law <law@redhat.com> + + * timevar.def (TV_TREE_SSA_THREAD_JUMPS): New timevar. + * tree-dump.c (dump_files): Add dump file for jump threading. + * tree.h (TDI_thread_jumps): New enum member. + * tree-cfg.c (tree_block_forwards_to): No longer static. + * tree-flow.h (tree_block_forwards_to): Prototype. + (tree_ssa_dominator_thread_jumps): Likewise. + * tree-optimize.c (optimize_function_tree): Call jump threader. + * tree-ssa-dom.c (tree_ssa_dominator_optimize_1): New function. + Common code for redundancy elimination and jump threading on + the dominator tree. Slightly different callback initialization + for redundancy elimination and jump threading. Initialize + block forwardable attribute. + (tree_ssa_dominator_optimize): Call tree_ssa_dominator_optimize_1. + (tree_ssa_dominator_thread_jumps): New function. + (thread_edge): Mark results of PHI nodes as needing rewriting if + we have threaded through a block with PHI nodes. + (thread_through_successor): If thread_through_phis is nonzero, + then allow jump threading through blocks with PHI nodes. If the + target block is a forwarder block, then forward the jump. + (thread_jumps_walk_stmts): Statement walker for dominator thread + jumping. + + * tree-ssa-dom.c (record_equivalence_from_incoming_edge): Fix + comment typo. + +2003-10-23 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_*): Return gimplify_status. + (gimple_add_tmp_var): Set seen_in_bind_expr. + (gimplify_bind_expr): Likewise. Kill if 0 code. + (gimplify_return_expr): Cope with error marks. + (gimple_push_cleanup): Do nothing if errors seen. + (gimplify_expr): Cope with error marks. Use gimplify_status to + decide when to exit the main loop. Zap statements with errors. + (gimplify_body): Return void. + (keep_function_tree_in_gimple_form): Don't exit on errors. + (gimplify_function_tree): Return bool. Don't exit on errors. + * langhooks.c (lhd_gimplify_expr): Return GS_UNHANDLED. + * langhooks.h (struct lang_hooks): Update docs for gimplify_expr. + * tree-optimize.c (optimize_function_tree): Don't exit on errors. + Move delete_tree_cfg call outside optimization clause. + (tree_rest_of_compilation): Don't exit on errors. + * tree-simple.h (enum gimplify_status): New. + (gimplify_expr, gimplify_stmt, gimplify_body): Update. + * tree-ssa.c (rewrite_out_of_ssa): Move delete_tree_cfg call to + optimize_function_tree. + * tree.h (struct tree_decl): Add seen_in_bind_expr. + (gimplify_function_tree): Update. + * c-common.c (c_add_case_label): Unify three error exit paths. + Create a normal label, not a case label to suppress unreachable + code warning. + * c-simplify.c (c_build_bind_expr): Don't create an empty bind + body. Pass entire bind_expr to gimplify_stmt. + (gimplify_block): Don't abort on mismatches if errors seen. + (gimplify_expr_stmt): Cope with error marks. + (gimplify_decl_stmt): Likewise. + (c_gimplify_expr): Return gimplify_status. + +2003-10-22 Daniel Berlin <dberlin@dberlin.org> + + * tree-pretty-print.c (dump_generic_node): Kill off ELEFT_NODE. + Print out status of new EUSE_LVAL flag. + + * tree-ssa-pre.c: #include alloc-pool.h + (append_eref_to_block): Inline. + (names_match_p): Ditto. + (pre_expression): Take sbitmap of variables to rename so we can + mark our new variable if necessary. + (insert_occ_in_preorder): Completely redo to be an O(n log n) + algorithm worst case, instead O(n^2) all the time. + (build_dfn_array): New function. + (eref_compare): Ditto. + (preorder_count): Remove no-longer used variable. + (pre_stats): Add new stats about memory use. + (struct expr_info): add loadpre_cand member. + (euse_node_pool): New alloc-pool + (eref_node_pool): Ditto + (create_expr_ref): Use them. + (expr_phi_insertion): Insert on PHI's of VUSES for loadpre cands. + Not all expressions have uses (left occurrences don't). + (load_modified_real_occ_real_occ): Return false, not abort. + (process_delayed_rename): Remove useless fibheap, do proper LVAL + handling. + (insert_euse_in_preorder_dt_order_1): No more ELEFT_NODE's. + (finalize_1): Ditto. + (set_save): Ditto. + (really_available_def): New function. + (finalize_2): Use really_available_def, not EUSE_SAVE, during EPHI + minimization. + (names_match_p): Handle INDIRECT_REF properly. + (call_modifies_slot): Removed. + (add_call_to_ei): Removed. + (process_left_occs_and_kills): Fix. + (pre_expression): Zero out counts. + (collect_expressions): Split out from tree_perform_ssapre. Do this + in domtree order. + (tree_perform_ssapre): Create and free alloc-pools. + Rename new variables that need to be renamed. + + * tree.c (tree_size): Remove ELEFT_NODE. + (tree_node_size): Ditto. + (is_essa_node): Ditto. + + * tree.def (ELEFT_NODE): Gone. + + * tree.h (EREF_NODE_CHECK): No more ELEFT_NODE. + (struct tree_eref_common): Add ID flag. + (struct tree_euse_node): Add lval flag. + (EREF_ID): New macro. + (EUSE_LVAL): New macro. + +2003-10-22 Daniel Berlin <dberlin@dberlin.org> + + * tree-flow-inline.h (add_dom_child): XMALLOC, not GGC_ALLOC, + the bitmap. + (clear_dom_children): XFREE the bitmap. + +2003-10-22 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-live.c (new_tree_live_info, (delete_tree_live_info, + live_worklist, set_if_valid, add_livein_if_notdef, + calculate_live_on_entry, calculate_live_on_exit, + add_conflicts_if_valid, dump_live_info): Use bitmap instead of sbitmap. + (build_tree_conflict_graph): Use bitmap, Change mechanism for + adding conflicts between live-on-entry partitions. + * tree-ssa-live.h (struct tree_live_info_d): Switch to bitmaps. + (partition_is_global, live_entry_blocks, live_on_exit, + live_merge_and_clear, make_live_on_entry): Switch to bitmaps. + * tree-ssa.c (struct _elim_graph): Remove bitmaps, use varrays. + (new_elim_graph, clear_elim_graph, delete_elim_graph): Switch from + old bitmap implementation. + (elim_graph_size): New. Number of elements in elimination graph. + (elim_graph_add_node): New. Add an element to the elim-graph. + (elim_graph_add_edge): New. Add an edge to the elim-graph. + (elim_graph_remove_succ_edge): New. Remove an edge for which a node + has a successor. + (FOR_EACH_ELIM_GRAPH_SUCC): Find all successor nodes. + (FOR_EACH_ELIM_GRAPH_PRED): Find all predeccesor nodes. + (eliminate_name, eliminate_build, elim_forward, + elim_unvisited_predecessor, elim_backward, elim_create, eliminate_phi): + Use new elim-graph routines. + (rewrite_out_of_ssa): Enable single-definition compaction when not + combining temporaries. + +2003-10-21 Richard Henderson <rth@redhat.com> + + * gimplify.c: Sort functions into use order, and all gimplification + functions to the end. + +2003-10-22 Jeff Law <law@redhat.com> + + * tree-cfg.c (thread_unconditional_jumps): New function. + (tree_block_forwards_to): Likewise. + (cleanup_tree_cfg): Call thread_unconditional_jumps. + * tree-flow.h (bb_ann_t): Add forwardable status bit. + + * tree-dump.c (dump_files): Add entry for TDI_none. + (dump_begin): Do nothing for TDI_none. + (dump_enable_all, dump_switch_p): Start our scan at TDI_none + 1. + * tree.h (tree_dump_index): Add. + * tree-ssa-dom.c (tree_ssa_dominator_optimize): If we have altered the + CFG and we have variables to [re]rename, go ahead and rename them before + starting the next iteration of the dominator optimizer. + +2003-10-21 Jason Merrill <jason@redhat.com> + + * gimplify.c (gimplify_modify_expr): Require a regvar on either + the lhs or rhs if we're dealing with a renameable type. + (canonicalize_component_ref): New fn. + (gimplify_compound_lval): Use it. + (gimplify_conversion): Use it. + (gimplify_expr): Lose redundant STRIP_MAIN_TYPE_NOPS. + Discard conversions in void context. + +2003-10-21 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (pre_expression): Free and allocate the + ephi_pindex_htab and phi_pred_cache in this function only. + (phi_pred_cache): New array to store cached phi preds, to avoid + recomputation and unnecessary copying. + (subst_phis): Use it. + (added_phis): array of added phis that is marked for GC. + + * Makefile.in: Add tree-ssa-pre.c to the gtype files, and + gt-tree-ssa-pre.h to the list of generated files. + +2003-10-21 Jason Merrill <jason@redhat.com> + + PR optimization/12661 + * tree-dfa.c (get_expr_operands): Handle TRUTH_NOT_EXPR. + * tree-simple.c (is_gimple_rhs): Allow TRUTH_NOT_EXPR. + * gimplify.c (gimplify_expr) <TRUTH_NOT_EXPR>: Don't rewrite to an + EQ_EXPR. + +2003-10-21 Jan Hubicka <jh@suse.cz> + + * haifa-sched.c (choose_ready): Initialize index. + * tree-tailcall.c (bb_optimize_tail_calls): Initialize has_return. + * f/lex.c (ffelex_cfelex_): Initialize d. + +2003-10-20 Diego Novillo <dnovillo@redhat.com> + + Fix PR optimization/12688 + * tree-dfa.c (get_stmt_operands): Don't return early when dealing + with an empty statement. + * tree-ssa-ccp.c (set_rhs): If the expression has no side effects, + replace the statement with an empty statement. + +2003-10-20 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-dce.c (processed): Change to an sbitmap. + (mark_necessary): Test bits in 'processed'. + (tree_ssa_dce): Initialize/free processed as an sbitmap. + +2003-10-20 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (bsi_prev): Also copy the context from the previous + iterator. + +2003-10-18 Richard Henderson <rth@redhat.com> + + * builtins.c (simplify_builtin): Handle BUILT_IN_CONSTANT_P. + +2003-10-18 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-tailcall.c: New. + * Makefile.in (tree-tailcall.o): Add. + * function.c (assign_parms): Setting of current_function_stdarg + moved ... + (allocate_struct_function): ... here. + * tree-dump.c (dump_files): Add .tail dump. + * tree-flow.h (tree_optimize_tail_calls): Declare. + * tree-optimize.c (optimize_function_tree): Call + tree_optimize_tail_calls. + * tree.h (enum tree_dump_index): Add TDI_tail. + +2003-10-18 Jan Hubicka <jh@suse.cz> + + * tree-ssa-copyprop.c (move_var_to_scope): Do not clear abstract + origin for static variables. + +2003-10-18 Jan Hubicka <jh@suse.cz> + + * integrate.c (copy_decl_for_inlinig): Fix copying of copies. + +2003-10-18 Jan Hubicka <jh@suse.cz> + + * cgraphunit.c (cgraph_analyze_function): Fix call of estimate_num_insns. + +2003-10-17 Kazu Hirata <kazu@cs.umass.edu> + + * ChangeLog.tree-ssa: Fix typos. + * tree-alias-common.c: Fix comment typos. + * tree-cfg.c: Likewise. + * tree-dfa.c: Likewise. + * tree-eh.c: Likewise. + * tree-flow.h: Likewise. + * tree-iterator.h: Likewise. + * tree-mudflap.c: Likewise. + * tree-ssa-ccp.c: Likewise. + * tree-ssa-dce.c: Likewise. + * tree-ssa-dom.c: Likewise. + * tree-ssa-live.c: Likewise. + * tree-ssa-live.h: Likewise. + * tree-ssa-pre.c: Likewise. + * tree-ssa.c: Likewise. + +2003-10-17 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-dce.c (processed): New Global vector. + (mark_necessary): Check if SSA_NAME has already been processed first. + (find_useful_stmts, process_worklist): Change call to mark_necessary(). + (tree_ssa_dce): Initialize and free processed vector. + * tree-cfg.c (handle_switch_fallthru): A new basic block can result + from splitting edges of nested switch stmts. + (handle_switch_split): If a new block is created, restart the loop for + inserting GOTO's to handle the new block. + +2003-10-17 Jan Hubicka <jh@suse.cz> + + * tree-cfg.c (remove_useless_stmts_and_vars_bind): Fix handling of + static variables. + +2003-10-16 Richard Henderson <rth@redhat.com> + + * common.opt (fdisable-gimple): Remove. + * flags.h (flag_disable_gimple): Remove. + * toplev.c (flag_disable_gimple): Remove. + (process_options): Don't check it. + (lang_independent_options): Don't set it. + * opts.c (common_handle_option): Likewise. + * gimplify.c (keep_function_tree_in_gimple_form): Don't check it. + * c-semantics.c (expand_stmt_toplev): Likewise. + * tree-optimize.c (tree_rest_of_compilation): Likewise. + * doc/invoke.texi: Don't document it. + +2003-10-16 Roger Sayle <roger@eyesopen.com> + + * fold-const.c: Merge from mainline. + * tree.c (associate_tree_code, commutative_tree_code): Use a + switch statement instead of a sequence of comparisons. + +2003-10-16 Richard Henderson <rth@redhat.com> + + * gimplify.c (maybe_protect_cleanup): Remove. + * tree-simple.h (maybe_protect_cleanup): Remove. + * c-simplify.c (gimplify_cleanup): Don't call it. + +2003-10-16 Jeff Law <law@redhat.com> + + * tree-cfg.c (found_computed_goto): New global for computed goto + factoring/unfactoring. + (factored_computed_goto_label, factored_computed_goto): Likewise. + (factor_computed_gotos): New function. + (build_tree_cfg): Use it. + (make_blocks): Record whether or not we find a computed goto. + (remove_useless_stmts_and_vars): Un-factor computed gotos. + (remove_useless_stmts_and_vars): Reset factored_computed_goto_label + and factored_computed_goto. + + * tree-ssa-dom.c (get_value_for, set_value_for): Move to the start + of the file. Delete pointless sanity checking. + + * tree-ssa.c (currdefs): Now a varray instead of a hash table. + (get_value_for, set_value_for): Corresponding changes. Move to + the start of the file and delete pointless sanity checking. + (rewrite_into_ssa, dump_tree_ssa_stats): Corresponding changes. + (var_value_hash, var_value_eq): Kill. + + * tree-ssa.c (rewrite_add_phi_arguments): Once we encounter a + rewritten PHI break the inner loop. + + * tree-ssa.c (insert_phi_nodes_for): Use EXECUTE_IF_AND_COMPL_IN_BITMAP. + + * tree-dfa.c (create_phi_node): Clear PHI_REWRITTEN on all new PHIs + (remove_all_phi_nodes_for): Set PHI_REWRITTEN on any PHIs which are + not removed. + * tree-ssa.c (rewrite_add_phi_arguments): Check the PHI node itself + to see if it has already been rewritten. + * tree.h (PHI_REWRITTEN): New accessor macro. + (struct phi_node): New field rewritten. + + * tree-flow.h (struct bb_ann_d): New field num_preds. + * tree-dfa.c (create_phi_node): Get the number of predecessors from + the block's annotation. + * tree-ssa.c (rewrite_into_ssa): Compute number of preds for each + block and store it into the block's annotation. + (insert_phi_nodes_for): Get the number of preds for each block + from the block's annotation. + + * tree-ssa.c: Remove parallel lifetime analysis code from April 2003. + (def_blocks_d): Remove PHI_INSERTION_POINTS field. + (compute_global_livein): Accept livein/def bitmaps to use for + life analyis rather than a varray of variables. Callers updated. + Rewritten to compute life information for one variable at a + time instead of several variables at once. + (insert_phis_for_deferred_variables): Remove. + (insert_phi_nodes_for): Lose varray argument. Callers updated. + No longer mess with deferring PHI insertions for variables. + (insert_phi_nodes): No longer need to deal with deferred variables. + Kill everything related to them. + +2003-10-15 Jeff Law <law@redhat.com> + + * domwalk.c, domwalk.h: New files. + * Makefile.in (OBJS-common): Add domwalk.c. + (tree-ssa-dom.o): Add dependency on $(BASIC_BLOCK_H) and domwalk.h. + (tree-ssa.o): Add dependency on domwalk.h. + (domwalk.o): Add dependencies. + * tree-ssa-dom.c: Include domwalk.h. + (cfg_altered, vars_to_rename): Now globals. + (dom_walk_block_data): New structure for block data used by dominator + walker. + (optimize_block, record_equivalences_from_block_entry): Kill. + (optimize_stmt): Lose "cfg_altered" argument. Update callers. + Initialize may_have_exposed_new_symbols. + (get_value_for, set_value_for): Lose "table" argument. Update + callers. Use const_and_copies table directly. + (lookup_avail_expr): Lose "const_and_copies" argument. Callers + updated. + (get_eq_expr_value): Similarly. Also accept a pointer to the + vrp_variables. Callers updated. + (update_rhs_and_lookup_avail_expr): Similarly. + (record_cond_is_true, record_cond_is_false): Similarly. + (simplify_rhs_and_lookup_avail_expr): Similarly. + (simplify_cond_and_lookup_avail_expr): Similarly. + (record_equivalences_from_phis): Similarly. + (record_equivalences_from_incoming_edge): Similarly. Also accept + a pointer to the block const_and_copies table and vrp_variables. + Callers updated. + (eliminate_redundant_computations): Similarly + (record_equivalences_from_stmt, thread_through_successor): Similarly. + (dom_opt_initialize_block): New function. Perform block local + initialization for the dominator optimizer. + (dom_opt_finalize_block): Renamed from finalize_block. Get + block local varrays from walk_data. Pop entry off block local + data stack when complete. + (dom_opt_walk_stmts): New function. + (cprop_into_phis): Get block local varrays from walk_data. + (record_range): Get vrp varray by reference than by value. + (tree_ssa_dominator_optimize): Store incoming "vars" variable into + global "vars_to_rename". Initialize walk_data. Use + walk_dominator_tree. + (cprop_into_stmt): Initialize may_have_exposed_new_symbols. + * tree-ssa.c: Include domwalk.h + (rewrite_finalize_block, rewrite_initialize_block): New functions + extracted from rewrite_block. + (rewrite_walk_stmts, rewrite_add_phi_arguments): Similarly. + (rewrite_block): Kill. + (rewrite_into_ssa): Initialize walk_data. Use walk_dominator_tree. + +2003-10-14 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_expr): Return bool. Bail gracefully if + fb_mayfail is set. + (gimplify_asm_expr): Take pointer-to-expr. Allow gimplify_expr + to fail for lvalues, and issue appropriate error messages. Zap + the entire asm statement on failure. + * tree-simple.h (enum fallback_t): Add fb_mayfail. + +2003-10-14 Richard Henderson <rth@redhat.com> + + * c-tree.h (C_LANG_TREE_NODE_CHAIN_NEXT): New. + (union lang_tree_node): Use it for chain_next annotation. + +2003-10-14 Richard Henderson <rth@redhat.com> + + * c-common.c: Include tree-iterator.h. + (c_expand_expr): Kill warn_unused_result checks. + (c_warn_unused_result): New. + * c-common.h (STMT_EXPR_WARN_UNUSED_RESULT): Remove. + (c_warn_unused_result): Declare. + * c-decl.c (finish_function): Always gimplify. Call + c_warn_unused_result. + * calls.c (expand_call): Kill warn_unused_result checks. + * Makefile.in (c-common.o): Update. + +2003-10-15 Steven Bosscher <steven@gcc.gnu.org> + + * cfghooks.c (dump_bb): Take extra `int indent' argument. + * cfg.c (dump_bb): Take extra argument to match cfg hook. + Write out all information about bb that is shared between the tree + and rtl representations. + * basic-block.c (dump_bb): Adjust prototype. + * cfgrtl.c (rtl_dump_bb): Update prototype to match cfg hook. + Use indent. + * flow.c (verify_wide_reg, verify_local_live_at_start): + Fixup dump_bb calls. + * tree-cfg.c (dump_tree_bb): Rename to tree_dump_bb. Remove unused + `prefix' argument. Put in tree_cfg_hooks as cfg hook for dump_bb. + (remove_bb, debug_tree_bb, dump_tree_cfg): Call dump_bb. + * tree-ssa (dump_tree_ssa): Likewise. + * tree-flow.h (dump_tree_bb): Replace with new tree_dump_bb + prototype. + * tree-pretty-print (dump_block_info): Match case of BLOCK, SUCC, + PRED with dump_bb. + +2003-10-14 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ander.c (throwaway_global): Delete. + (andersen_same_ponts_to_set): We handle all globals individually + now. + * tree-alias-common.c: Remove doxygen markers. + (get_alias_var_decl): Always create an alias var for globals now. + Assign the global alias vars to GLOBAL_VAR, too. + (intra_function_call): Fix logic, do a bit of pre-filtering to + avoid useless global aliasing. + (get_values_from_constructor): It's the same for field based and + not field based. + (create_alias_vars): Remove special global var handling. + (same_points_to_set): Ditto. + (ptr_may_alias_var): Ditto. + +2003-10-14 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (cprop_into_phis): Avoid doing useless work if the + edge we care about is abnormal. + * tree-ssa-copyprop (cprop_phi): Avoid doing useless work if the + destination of the PHI node occurs in an abnormal PHI. + + * tree-ssa-dom.c (record_equivalences_from_stmt): Renamed from + record_equivalances. Caller updated. + (record_equivalences_from_phis): New function extracted from + optimize_block. + (record_equivalences_from_incoming_edge): Likewise. + (record_equivalances_from_block_entry): Likewise. + (cprop_into_phis): Likewise. + (optimize_stmt): Lots of code moved into new functions. Call + record_equivlances_from_block_entry. + + * tree-ssa-dom.c (optimize_block): Simplify interface slightly. + Use finalize_block. Extract edge_flags from our block's + incoming edge as necessary. Simplify recursive call. + (thread_through_successor): Extracted from optimize_block. + (finalize_block): Similarly. + + * tree-ssa-dom.c (eliminate_redundant_computations): New function + extracted from optimize_stmt. + (record_equivalences): Similarly. + (optimize_stmt): Use eliminate_redundant_computations and + record_equivalences. If fold_stmt changes stmt, then make sure + to get a new annotation as well. + + * tree-cfg.c (cleanup_control_flow): Pass last statement down to + cleanup_cond_expr_graph and cleanup_switch_expr_graph. + (cleanup_cond_expr_graph): Accept statement from caller and + use it. Return nonzero if the predicate was constant. No longer + static. + (cleanup_switch_expr_graph): Similarly. + (disconnect_unreachable_case_labels): Similarly, except that it + is still static. + * tree-flow.h (cleanup_cond_expr_graph): Prototype. + (cleanup_switch_expr_graph): Similarly. + * tree-ssa-dom.c (optimize_stmt): Also optimize the condition + in a SWITCH_EXPR. Use COND_EXPR_COND and SWITCH_COND to get + conditions instead of relying upon known operand positions. + Use cleanup_cond_expr_graph and cleanup_switch_expr_graph rather + than open coding equivalents. + (lookup_avail_expr): Handle SWITCH_EXPRs. Use COND_EXPR_COND and + SWITCH_COND to get conditions instead of relying upon known + operand positions. + (avail_expr_hash, avail_expr_eq): Similarly. + +2003-10-14 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_body): Save and restore input_location; + initialize input_location to DECL_SOURCE_LOCATION. + (gimplify_expr): Always save and restore input_location. + +2003-10-14 Richard Henderson <rth@redhat.com> + + * expr.c (expand_expr): Break out EXPR_LOCUS code from ... + (expand_expr_1): ... here, renamed from expand_expr. + +2003-10-13 Richard Henderson <rth@redhat.com> + + * c-simplify.c (c_gimplify_stmt): Upreate on location_t and not + fine and line individually. + (gimplify_c_loop, gimplify_switch_stmt): Likewise. + * gimplify.c (wfl_locus): Merge wfl_filename+wfl_lineno. + (annotate_all_with_locus_1): Rename from annotate_stmt_with_file_line. + (annotate_all_with_locus): Replace annotate_all_with_file_line; + update all callers. + * tree-simple.h: Update. + * tree.c, tree.h (annotate_with_locus): New. + +2003-10-13 Steven Bosscher <steven@gcc.gnu.org> + + * tree-flow-inline.h (def_ops): Take a stmt_ann_t as argument + instead of a tree. + (use_ops): Likewise. + (vdef_ops): Likewise. + (vuse_ops): Likewise. + * tree-flow.h: Update prototypes. + * tree-cfg.c (remove_stmt): Load the statement annotation. + Adjust *_ops calls. + * tree-dfa.c (compute_immediate_uses_for_stmt, + mark_new_vars_to_rename): Likewise. + * tree-pretty-print.c (dump_vops): Likewise. + * tree-ssa-ccp.c (tree_ssa_ccp): Likewise. Also remove now + superfluous stmt_ann() calls. + (visit_stmt, cpp_fold, add_var_to_ssa_edges_worklist, + initialize, replace_uses_in, likely_value): Likewise. + * tree-ssa-copyprop.c (copyprop_stmt): Likewise. + * tree-ssa-dce.c (stmt_useful_p, process_worklist): Likewise. + * tree-ssa-dom.c (cprop_into_stmt, optimize_stmt, + avail_expr_hash, avail_expr_eq): + Likewise. + * tree-ssa-live.c (create_ssa_var_map, calculate_live_on_entry, + build_tree_conflict_graph): Likewise. + * tree-ssa-pre.c (maybe_find_rhs_use_for_var, + expr_phi_insertion, same_e_version_real_occ_real_occ, + generate_expr_as_of_bb, bool load_modified_real_occ_real_occ, + bool same_e_version_phi_result, get_default_def,reaching_def, + tree_perform_ssapre): Likewise. + * tree-ssa.c (mark_def_sites, rewrite_out_of_ssa, rewrite_stmt): + Likewise. + +2003-10-12 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_array_ref_to_plus): Be prepared for + null TYPE_DOMAIN or TYPE_MIN_VALUE for the array. + * tree-ssa-ccp.c (fold_indirect_refs_r): Likewise. + +2003-10-12 Richard Henderson <rth@redhat.com> + + * tree.h (struct tree_common): Rename unused_1 to invariant_flag. + (TREE_INVARIANT): New. + * builtins.c (build_string_literal): Set TREE_INVARIANT. + * c-common.c (fix_string_type): Likewise. + * c-typeck.c (build_external_ref): Likewise. + (build_c_cast, pop_init_level): Likewise. + * fold-const.c (fold_convert, fold): Likewise. + * tree.c (make_node, build_constructor): Likewise. + (build, build1): Likewise. + (staticp): Pass unknown component references to the language. + (save_expr): Check TREE_INVARIANT instead of TREE_CONSTANT. + (skip_simple_arithmetic): Likewise. + (stabilize_reference_1): Likewise. + * print-tree.c (print_node): Print TREE_INVARIANT. + + * c-common.c (pointer_int_sum): Rely on build to set TREE_CONSTANT. + (finish_label_address_expr): Likewise. + * c-typeck.c (default_function_array_conversion): Likewise. + (parser_build_binary_op, pointer_diff): Likewise. + (build_unary_op, build_binary_op): Likewise. + * fold-const.c (non_lvalue): Likewise. + + * tree-pretty-print.c (dump_generic_node): Handle VIEW_CONVERT_EXPR. + +2003-10-12 Richard Henderson <rth@redhat.com> + Diego Novillo <dnovillo@redhat.com> + + * gimplify.c (gimplify_array_ref_to_plus): Subtract the array + domain minimum index. + (gimplify_addr_expr): Expand ARRAY_REFs. Cope with Fortran + missing cast wierdnesses. + * tree-dfa.c (get_expr_operands): Handle (&v + c); abort on + other address invariants that should have been folded. + (vdefs_disappeared_p): New. + (mark_new_vars_to_rename): Use it. Move from ... + * tree-ssa-dom.c: ... here. + * tree-flow-inline.h (is_unchanging_value): Remove; use + is_gimple_min_invariant everywhere instead. + (phi_ssa_name_p): New. + * tree-must-alias.c (find_addressable_vars): Process PHIs. + * tree-simple.c (is_gimple_min_invariant): Rename from + is_gimple_const; allow non-static variable addresses; update callers. + (is_gimple_val): Remove ADDR_EXPR checks. + * tree-simple.h: Update. + * tree-ssa-ccp.c (replace_uses_in): Add replaced_address argument. + (substitute_and_fold): Use that to mark_new_vars_to_rename. + (fold_indirect_refs_r): New. + (fold_stmt): Use it. + * tree-ssa-copyprop.c (copyprop_stmt): Call fold_stmt. + * tree-ssa-dce.c (NECESSARY): Use asm_written_flag. + (mark_necessary): Reject DECLs. + * tree-ssa-live.c (register_ssa_partition): Use phi_ssa_name_p. + * tree-ssa-pre.c (generate_expr_as_of_bb): Call fold_stmt if we + replaced with constants. + * tree-ssa.c (insert_copy_on_edge): Unwrap ADDR_EXPRs to set_is_used. + (eliminate_build, coalesce_abnormal_edges, coalesce_vars): Use + phi_ssa_name_p. + +2003-10-09 Frank Ch. Eigler <fche@redhat.com> + + java/12211 + * gimplify.c (gimplify_save_expr): Tolerate void-typed saved + expressions. + +2003-10-09 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_call_clobber_ops): If a variable is read-only, + add a VUSE operand instead of VDEF. + +2003-10-08 Jason Merrill <jason@redhat.com> + + PR optimization/12525 + * tree-dfa.c (note_addressable): New fn, split out from... + (add_stmt_operands): Here. + (get_stmt_operands) <ASM_EXPR>: Call it for mem ops. + * gimplify.c (gimplify_asm_expr): Call parse_input_constraint + directly. It's only a mem op if allows_mem is set. + +2003-10-08 Diego Novillo <dnovillo@redhat.com> + + PR/12187 + * tree-dfa.c (add_stmt_operand): Test against current_function_decl + when checking for global variables. + (may_access_global_mem_p): Likewise. + (add_referenced_var): Likewise. + Consider DECL_NONLOCAL variables call clobbered and used. + (find_hidden_use_vars): Do not test for DECL_NONLOCAL variables. + * tree-optimize.c (tree_rest_of_compilation): Test against + current_function_decl when checking for global variables. + * tree-ssa-ccp.c (get_default_value): Likewise. + * tree-ssa-dce.c (need_to_preserve_store): Likewise. + +2003-10-07 Jason Merrill <jason@redhat.com> + + PR optimization/12525 + * gimplify.c (gimplify_asm_expr): If the constraint doesn't allow + a register, call mark_addressable. Split an in/out operand that + does allow a register into separate input and output operands. + +2003-10-06 Richard Henderson <rth@redhat.com> + + * fold-const.c (fold): Fold (T1)((T2)X op Y) into (T1)X op Y, + for suitable values of T1 & T2. + +2003-10-06 Andrew Macleod <amacleod@redhat.com> + + * tree-dfa.c (compute_immediate_uses): Add optional callback. + (compute_immediate_uses_for_phi): Remove unused parameter. Add optional + callback to determine if usage info should be calculated for variable. + (compute_immediate_uses_for_stmt): Add optional callback to determine + if usage info should be calculated for variable. + * tree-flow.h (compute_immediate_uses): Update prototype. + * tree-ssa-ccp.c (need_imm_uses_for): New. Callback function passed to + compute_immediate_uses. + (initialize): Calculate defaults initially, then build reduced + immediate use information. + (get_default_value): Non empty stmt's which are not a PHI_NODE or + a MODIFY_EXPR default to VARYING. + +2003-10-06 Andrew Macleod <amacleod@redhat.com> + + * tree-cfg.c (tree_split_edge): Mark edge as FALLTHRU when splitting. + +2003-10-03 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa.c (rewrite_block): Test vars_to_rename instead of + PHI_ARG_CAPACITY. + * tree-dfa.c (remove_phi_arg_num): Don't update + PHI_ARG_CAPACITY. + +2003-10-01 Richard Henderson <rth@redhat.com> + + * c-decl.c (set_decl_nonlocal): New. + (store_parm_decls): Use it via walk_tree. + +2003-10-01 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (cprop_into_stmt): New function extracted from + optimize_stmt. + (optimize_stmt): Use cprop_into_stmt. + +2003-09-30 Richard Henderson <rth@redhat.com> + + * function.h (struct function): Add function_end_locus. + * c-decl.c (finish_function): Set it. + * tree-optimize.c (tree_rest_of_compilation): Set input_location + to function_end_locus before expand_function_end. + + * tree-optimize.c (optimize_function_tree): Move calls to + remove_useless_stmts_and_vars and lower_eh_constructs ... + (tree_rest_of_compilation): ... here. + + * c-simplify.c (gimplify_expr_stmt): Don't warn for any statement + with void result type. + +2003-09-30 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (simplify_cond_and_lookup_avail_expr): Fix thinko + in test for swapping ranges. + + * tree-ssa-dom.c (record_range): New function. + (extract_range_from_cond): Likewise. + (tree_ssa_dominator_optimize): Initialize the vrp_data varray. + (optimize_block): Initialize the vrp_variables varray. Wipe + appropriate entries from the VRP varrays when done processing a block. + (get_eq_expr_value): Accept new argument "bb". Call record_range + appropriately. Refactor code to avoid useless work. + (simplify_cond_and_lookup_avail_expr): Use value range records to + simplify conditions. + (simplify_rhs_and_lookup_avail_expr): When simplifying ABS_EXPR, + DIV_EXPR and MOD_EXPR, use simplify_cond_and_lookup_avail_expr + to determine the range of the given variable. + + * tree-ssa-dom.c (find_equivalent_equality_comparison): Do not + look through a typecast which narrows a value. + +2003-09-30 Paul Brook <paul@nowt.org> + + * Makefile.in: Add rules for check-gfortran. + +2003-09-29 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_cond_expr): Fix both arms dead return value. + +2003-09-29 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (simplify_cond_and_lookup_avail_expr): New function. + (find_equivalent_equality_comparison): Likewise. + (optimize_block): Remove code to build a == c equivalence after + seeing a == b and b == c. Remove code to walk backwards + though typecasts to record equivalences and move relevant parts + into find_equivalent_equality_comparison. + (optimize_stmt): Call simplify_cond_and_lookup_avail_expr. + +2003-09-28 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_call_expr): Annotate all call_exprs. + * tree-inline.c (expand_call_inline): Set input_location based + on EXPR_LOCUS; save and restore input_location around that. + (walk_tree): Do not set input_location. + +2003-09-27 Graham Stott <graham.stott@btinternet.com> + + * expr.c (expand_expr)[CATCH_EXPR]: Fix bogus return value. + +2003-09-26 Andrew MacLeod <amacloeod@redhat.com> + + * tree-ssa-dom.c (struct var_value_d): Remove. + (const_and_copies): Change to a varray_type. + (tree_ssa_dominator_optimize): Initialize const_and_copies as a varray. + (optimize_block): Simply set the value in const_and_copies. + (dump_dominator_optimization_stats): No hash stats for const_and_copies. + (record_cond_is_true, record_cond_is_false, + simplify_rhs_and_lookup_avail_expr, update_rhs_and_lookup_avail_expr): + Parameter const_and_copies is now a varray_type. + (var_value_hash, var_value_eq): Remove. + (get_value_for, set_value_for): Access varray elements. + (get_eq_expr_value): Parameter const_and_copies is now a varray_type. + + * tree-cfg.c (handle_switch_split): Update container of previous stmt. + +2003-09-25 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (split_critical_edges): New function, temporarily + disabled until some edge splitting/insertion problems are fixed. + (opnum_of_ephi): Take an edge argument, constify. Use hash table lookup. + Update all callers. + (ephi_pindex_eq): New function. + (ephi_pindex_hash): New function. + (ephi_pindex_htab): New variable. + (add_ephi_pred): Update hash table. + (expr_phi_insertion): Don't free the bitmap returned by compute_idfs + anymore. + (idfs_cache): New variable. + (compute_idfs): Rewrite to use cache as much as possible, and not + recompute when we can avoid it. + +2003-09-25 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ander.c: Fixup comment spacing. + (andersen_op_assign): Handle >2 operands case. + +2003-09-24 Steven Bosscher <steven@gcc.gnu.org> + + * tree-dfa.c (compute_immediate_uses_for): Split up in two + separate functions, one for PHIs and one for normal statements. + (compute_immediate_uses_for_phi): New. + (compute_immediate_uses_for_stmt): New. + +2003-09-25 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_block): When EQ_EXPR_VALUE has the + form DEST = SRC where both DEST and SRC are SSA_NAMEs also + record SRC = DEST into the const and copies table. + + * tree-ssa-dom.c (optimize_block): Change tests which checked + for SSA_VAR_P to only allow SSA_NAMEs. + (get_value_for, set_value_for): Likewise. + (lookup_avail_expr, get_eq_expr_value): Likewise. + +2003-09-25 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-dce.c (pdom_info, needed_stmts): Remove. + (NECESSARY): Define. + (necessary_p): Check bit instead of hash table lookup. + (clear_necessary): New. Clear necessary bit. + (mark_necessary): Use bit instead of hash table. No control lookup. + (mark_tree_necessary): Remove. + (find_useful_stmts): Clear necessary bit before checking it. + (stmt_useful_p): Remove GOTO_EXPR case. Check arms of COND_EXPR for + GOTO. All other control flow stmts are necessary. + (process_worklist): Dont look for control parents. + (remove_dead_stmts): No dominattor info is necessary. + (remove_dead_stmt): Don't need BB any more. Remove COND_EXPR by changing + the condition to 'if (0)'. Abort on other control flow. + (tree_ssa_dce): No longer need the hash table. + (remove_conditional): Remove. + +2003-09-25 Andreas Schwab <schwab@suse.de> + + * tree-flow.h: Declare next_ssa_version. + * tree-ssa-ccp.c: Remove conflicting declaration. + * tree-ssa-live.c: Likewise. + * tree.c (make_ssa_name): Likewise. + +2003-09-24 Jason Merrill <jason@redhat.com> + + * tree.h (DECL_SOURCE_LOCATION): Resurrect. + (DECL_SOURCE_FILE, DECL_SOURCE_LINE): Likewise. + (EXPR_LOCUS): Renamed from TREE_LOCUS. Null for non-exprs. + (SET_EXPR_LOCUS): New macro. + (EXPR_FILENAME): Renamed from TREE_FILENAME. + (EXPR_LINENO): Renamed from TREE_LINENO. + (struct tree_common): Remove locus field. + (struct tree_decl): Re-add locus field. + (struct tree_expr): Add locus field. + * c-aux-info.c, c-decl.c, coverage.c, c-parse.in, dbxout.c, + diagnostic.c, dwarf2out.c, expr.c, function.c, gimplify.c, + integrate.c, print-tree.c, stmt.c, tree.c, tree-cfg.c, + tree-dump.c, tree-flow-inline.h, config/alpha/alpha.c, + config/mips/mips.c: Adjust. + +2003-09-24 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-ccp.c (enum latticevalue): Add UNINITIALIZED. + (const_values, struct value_map_d): Remove hash table structures. + (value_vector): New array of values. + (get_value): Use value_vector instead of hash table. Mark inline. + (visit_phi_node): Ignore arguments if the PHI result is already VARYING. + (initialize): Initialize value vector instead of hash table. + (finalize): Free value vector instead of hash table. + (add_var_to_ssa_edges_worklist): Don't add to worklist if + DONT_SIMULATE_AGAIN flag is set. + (value_map_hash, value_map_eq): Delete. + +2003-09-24 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_block): Create infrastructure for + tracking const_and_copies equivalences which disappear when + we leave the current block. Use it for equivalences created + by EQ_EXPR_VALUE. Follow use-def chains for EQ_EXPR_VALUE + equivalences and see if certain NOP_EXPRs can be ignored + to create a block-local equivalence for const_and_copies. + (optimize_stmt): Do not get confused by a cast of the return + value from alloca or the address of a non-weak decl. + + * fold-const.c (fold_read_from_constant_string): New function. + * tree.h (fold_read_from_constant_string): Prototype. + * expr.c (expand_expr, case INDIRECT_REF): Use it. + (expand_expr, case ARRAY_REF): Likewise. Put checking code + inside an ENABLE_CHECKING. + * tree-ssa-ccp.c (fold_stmt): Use fold_read_from_constant_string. + * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Likewise. + +2003-09-23 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_block): Ignore "useless" type + conversions in SWITCH_COND when creating equivalenecs at + case labels. + +2003-09-22 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_stmt): Addresses of non-weak symbols + as well as dynamically allocated stack space are always nonzero. + + * tree-cfg.c (handle_switch_split): Properly mark the fallthru + edge from SRC to DEST with EDGE_FALLTHRU. + +2003-09-22 Daniel Berlin <dberlin@dberlin.org> + + * tree-flow.h (struct bb_ann_d): Add erefs array. + * tree-ssa-pre.c (handle_bb_creation): Remove ei parameter. + Update caller. + (struct expr_info): Remove erefs array. + (append_eref_to_block): New function. + (clear_all_eref_arrays): Ditto. + (expr_phi_insertion): Use append_eref_to_block. + (insert_occ_in_preorder_dt_order_1): Ditto. + (subst_phis): Only copy expression, not the containing EUSE/EPHI. + Update all callers to reflect this. + (compute_will_be_avail): Update for per-block eref array. + (handle_bb_creation): Ditto. + (pre_expression): Ditto. + (tree_perform_ssapre): Clear eref arrays when done with expression. + +2003-09-22 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (dump_tree_bb): Remove superlfuous newlines. + +2003-09-21 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (compute_alias_sets): Use TDI_alias instead of + TDI_ssa. + * tree-dump.c (dump_files): Add enties for TDI_alias, TDI_ssa1, + TDI_dom1, TDI_ssa2, TDI_dce1, TDI_ssa3, TDI_dom2, TDI_ssa4, + TDI_ssa5 and TDI_dce2. + Remove entries for TDI_ssa, TDI_dom and TDI_dce. + * tree.h (enum tree_dump_index): Similarly. + (TDF_ALIAS): Remove. + (TDF_VOPS): Change value. + * doc/invoke.texi (-fdump-tree-alias): Document. + * tree-flow.h (tree_warn_uninitialized): Remove unused variable. + (rewrite_into_ssa): Add enum tree_dump_index argument. Update all + callers. + (rewrite_out_of_ssa): Likewise. + (tree_perform_ssa_pre): Likewise. + (tree_ssa_dominator_optimize): Likewise. + (tree_ssa_dce): Likewise. + (tree_ssa_copyprop): Likewise. + (tree_ssa_ccp): Likewise. + Add sbitmap argument. + (tree_compute_must_alias): Likewise. + (mark_new_vars_to_rename): Declare. + * tree-must-alias.c (tree_compute_must_alias): Do not call + rewrite_into_ssa. + Remove local vars_to_rename. Use new argument instead. + * tree-optimize.c (optimize_function_tree): Re-write optimization + ordering to support passes that need the SSA form updated. + Call tree_ssa_dominator_optimize. + Re-arrange optimization ordering. + * tree-ssa-ccp.c (substitute_and_fold): Take new argument + vars_to_rename. + Call mark_new_vars_to_rename. + (visit_phi_node): Move variable 'val' into the right scope. + (initialize): Move call dump_begin ... + (tree_ssa_ccp): ... here. + * tree-ssa-dom.c (mark_new_vars_to_rename): Declare extern. + Make sure that variables in virtual operands aren't marked + unnecessarily. + * tree-ssa.c (rewrite_into_ssa): Do not call + tree_ssa_dominator_optimize. + +2003-09-21 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-dce.c (dom_info): Remove unused variable. + * tree-ssa-dom.c (tree_ssa_dominator_optimize): If the CFG has been + altered, call cleanup_tree_cfg. + Call cleanup_tree_cfg before returning. + * tree-ssa-pre.c (tree_perform_ssapre): Call get_stmt_operands + before processing the statement. + * tree-ssa-dom.c (thread_edge): Remove attribute EDGE_FALLTHRU from + edge. + +2003-09-21 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (simplify_rhs_and_lookup_avail_expr): Break out of + optimize_stmt. Follow the def-use chains back for certain expressions + to see if we can simplify the RHS of the current expression based + on earlier expressions. + + * tree-ssa-dom.c (optimize_block): Rework code to propagate values + into PHI nodes to be more efficient. + +2003-09-20 Andrew MacLeod <amacleod@redhat.com> + + * tree-flow.h (struct dataflow_d): Remove reaching fields, add 2 element + vector of trees. + * tree-flow-inline.h (immediate_uses): Rename to get_immediate_uses, + return a dataflow object. + (reaching_defs): Remove until needed. + (num_immediate_uses): New. Return number of immediate uses. + (immediate_use): New. Return a specified immediate use. + * tree-dfa.c (add_immediate_use): Use new fields. + (dump_immediate_uses_for): Use new interface. + (create_phi_node): Chain to start of list. + * tree-ssa-ccp.c (add_var_to_ssa_edges_worklist): Use new interface. + * tree-ssa.c (compute_global_livein): Loop interchange. + +2003-09-18 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_stmt): Allow optimizing the RHS of a + MODIFY_EXPR even if we can't record any equivalences created by + the MODIFY_EXPR. Move code to simplify ABS_EXPR, TRUNC_DIV_EXPR + and TRUNC_MOD_EXPR to an earlier position. + +2003-09-19 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-ccp.c (cfg_edges): Rename to cfg_blocks. + (cfg_blocks_num, cfg_blocks_head, cfg_blocks_tail): New. Queue markers. + (bb_in_list): New. Vector indicating if a BB is in the cfg_blocks list. + (tree_ssa_ccp): Use new routines. + (add_control_edge): Add to cfg_blocks list. + (initialize): Initialize new variables. + (finalize): Free allocations. + (cfg_blocks_empty): New. Is cfg_blocks queue list. + (cfg_blocks_add): New. Add a basic block to cfg_blocks list. + (cfg_blocks_pop): New. Get a basic_block from the list. + +2003-09-18 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (struct rusv_data): Add may_throw, may_branch. + (remove_useless_stmts_and_vars_1): Set them. + (remove_useless_stmts_and_vars_goto): Likewise. + (remove_useless_stmts_and_vars_tf): Transform to compound_expr + if only fallthrough. + (remove_useless_stmts_and_vars_tc): Kill region if nothrow. + Detect catch regions that don't propagate exceptions. + (remove_useless_stmts_and_vars): Zero entire data struct. + +2003-09-18 Richard Henderson <rth@redhat.com> + + * tree-eh.c (lower_try_finally_dup_block): New. + (honor_protect_cleanup_actions, lower_try_finally_copy): Use it. + +2003-09-18 Richard Henderson <rth@redhat.com> + + * tree-cfg (remove_useless_stmts_and_vars_cond, + remove_useless_stmts_and_vars_tf, + remove_useless_stmts_and_vars_tc, + remove_useless_stmts_and_vars_bind, + remove_useless_stmts_and_vars_goto): Break out of ... + (remove_useless_stmts_and_vars_1): ... here. Rename to _1; + take and use struct rusv_data. + (remove_useless_stmts_and_vars): New. Loop until no change. + * tree-flow.h (remove_useless_stmts_and_vars): Update decl. + * tree-ssa.c (rewrite_out_of_ssa): Don't loop here. + +2003-09-18 Richard Henderson <rth@redhat.com> + + * tree-pretty-print.c (dump_generic_node): Don't double indent asms. + +2003-09-18 Richard Henderson <rth@redhat.com> + + * tree-eh.c: Include langhooks.h, remove errors.h. + (decide_copy_try_finally): Use estimate_num_insns to choose + between copy and switch implementations. + + * c-common.c (c_estimate_num_insns): Take an expr, not a decl. + * tree-inline.c (limits_allow_inlining): Pass it the body of the decl. + +2003-09-18 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (lookup_avail_expr): New argument which indicates + if the expression should be entered into the hash table. All + callers updated. + (update_rhs_and_lookup_avail_expr): New function factored out + of optimize_stmt. + + * tree.h (commutative_tree_code, associative_tree_code): Declare + * tree.c (commutative_tree_code, associative_tree_code): New + functions. + (iterative_hash_expr): Use commutative_tree_code. + * fold-const.c (operand_equal_p): Use commutative_tree_code + rather than inlining the communitivy check. + (fold, nondestructive_fold_binary_to_constant): Similarly. + +2003-09-18 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-eh.o): Add dependency on errors.h + * tree-eh.c: Include errors.h + +2003-09-17 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (remove_useless_stmts_and_vars): Revert last change. + * tree-flow.h, tree-ssa.c: Likewise. + +2003-09-17 Richard Henderson <rth@redhat.com> + + * tree-eh.c (decide_copy_try_finally): Remove forgotten debug code. + +2003-09-17 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (pick_ssa_name): New function. + (code_motion): Use it. + +2003-09-17 Richard Henderson <rth@redhat.com> + + * tree-eh.c: New file. + * Makefile.in (OBJS-common): Add it. + (tree-eh.o): New. + * calls.c (emit_call_1): New argument for full call expr. + Check with lookup_stmt_eh_region to set REG_EH_REGION. + (expand_call): Likewise for tail-calls. + * except.c (struct eh_region): Add tree_label. + (gen_eh_region, gen_eh_region_cleanup, gen_eh_region_try, + gen_eh_region_catch, gen_eh_region_allowed, + gen_eh_region_must_not_throw, get_eh_region_number, + get_eh_region_may_contain_throw, get_eh_region_tree_label, + set_eh_region_tree_label, expand_resx_expr): New. + (expand_eh_region_start, expand_start_catch): Use them. + (expand_end_catch): Tidy. + (note_eh_region_may_contain_throw): Take region argument. + (note_current_region_may_contain_throw): New. + (get_exception_filter): Export. + (collect_eh_region_array): Export. + (remove_unreachable_regions): Check ERT_TRY based on reachability + of catches, not reachability of continue_label. Never remove + ERT_MUST_NOT_THROW regions. + (collect_rtl_labels_from_trees): New. + (convert_from_eh_region_ranges): Use it. + (connect_post_landing_pads): Handle dying cleanups. + (struct reachable_info): Add callback data. + (add_reachable_handler): Invoke the callback. + (foreach_reachable_handler): New. + (reachable_handlers): Use it. + (arh_to_landing_pad, arh_to_label): New. + (can_throw_internal_1): Split out from can_throw_internal. + (can_throw_external_1): Similarly. + * except.h: Update. + * expr.c (expand_expr): Handle RESX_EXPR, FILTER_EXPR. + * gimplify.c (gimplify_modify_expr): Use tree_could_trap_p. + * stmt.c (using_eh_for_cleanups_p): Export. + (expand_return): Allow any typed rhs. + * timevar.def (TV_TREE_EH): New. + * tree-cfg.c (eh_stack): Kill. + (build_tree_cfg): Don't set it. Kill code to handle EH. + (could_trap_p): Move to tree-eh.c as tree_could_trap_p. + (get_eh_region_type, make_try_expr_blocks, make_catch_expr_blocks, + make_eh_filter_expr_blocks, try_finallys): Kill. + (make_edges): Kill code to handle EH. + (make_ctrl_stmt_edges): Kill TRY_FINALLY_EXPR, CATCH_EXPR, + EH_FILTER_EXPR. Handle RESX_EXPR. + (make_call_expr_edges): Kill. + (make_exit_edges): Use make_eh_edges. + (label_to_block): New. + (make_goto_expr_edges): Use it. + (is_ctrl_stmt): Add RESX_EXPR. + (is_ctrl_altering_stmt): Restructure. Use tree_can_throw_internal. + (last_exec_block, compute_reachable_eh): Kill. + * tree-dfa.c (get_stmt_operands): Add RESX_EXPR. + (get_expr_operands): Add FILTER_EXPR. + * tree-dump.c (dump_files): Add tree-eh. + * tree-flow.h (struct stmt_ann_d): Kill reachable_exception_handlers. + (label_to_block, lower_eh_constructs, make_eh_edges, + tree_could_trap_p, tree_could_throw_p, tree_can_throw_internal, + tree_can_throw_external): Declare. + * tree-optimize.c (optimize_function_tree): Call lower_eh_constructs. + (tree_rest_of_compilation): Save tree for inlining. + * tree-pretty-print.c (dump_generic_node): Handle FILTER_EXPR, + RESX_EXPR. + * tree-simple.c (is_gimple_stmt): Add RESX_EXPR. + (is_gimple_val): Add FILTER_EXPR. + * tree-ssa-dce.c (stmt_useful_p): Restructure. Add lhs of + EXC_PTR_EXPR or FILTER_EXPR. + * tree.def (FILTER_EXPR, RESX_EXPR): New. + * tree.h (enum tree_dump_index): Add TDI_eh. + +2003-09-17 Richard Henderson <rth@redhat.com> + + * tree.c (tsi_link_before): Remove unnecessary parens. + (tsi_link_chain_before, tsi_delink): Likewise. + (tsi_link_after): Accept the case if the iterator points + to a NULL node; treat it as an empty list. + (tsi_link_chain_after): Likewise. Update iterator properly + for TSI_CHAIN_END. + +2003-09-17 Richard Henderson <rth@redhat.com> + + * tree-inline.c (debug_find_tree_1, debug_find_tree): New. + +2003-09-17 Richard Henderson <rth@redhat.com> + + * tree-cfg.c (struct rusv_data): New. + (remove_useless_stmts_and_vars_1): Rename from + remove_useless_stmts_and_vars. Use rusv_data. Handle goto-next + via remembering the last goto seen, and zapping it when appropriate. + (remove_useless_stmts_and_vars): New. Loop until done. + * tree-flow.h (remove_useless_stmts_and_vars): Update decl. + * tree-optimize.c (optimize_function_tree): Don't cache fnbody. + Dump data after remove_useless_stmts_and_vars. + * tree-ssa.c (rewrite_out_of_ssa): Kill loop around + remove_useless_stmts_and_vars. + * tree-dump.c (dump_files): Add .useless. + * tree.h (enum tree_dump_index): Add TDI_useless. + +2003-09-17 Diego Novillo <dnovillo@redhat.com> + + * pretty-print.c (pp_write_text_to_stream): Export. + * pretty-print.h (pp_write_text_to_stream): Declare. + * tree-pretty-print.c (print_generic_stmt): Flush to file. + (dump_generic_node): Call pp_write_text_to_stream. + (maybe_init_pretty_print): Take file argument; associate the + stream with the buffer. + +2003-09-17 Jeff Law <law@redhat.com> + + * tree-ssa-ccp.c (ccp_fold): If the return value has the wrong + type, try to convert it to the proper type rather than failing. + + * tree-ssa-dom.c (optimize_stmt): Note that the statement is + modified, even if we just change the virtual operands. If + the statement was modified by const/copy propagation, then + set may_have_exposed_new_symbols. + +2003-09-17 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_vars_r): Do not consider 'void *' pointers as + dereferenced when scanning function call arguments. + * tree-flow-inline.h (may_propagate_copy): Block propagation of + pointers when they have different memory tags. + * tree-ssa-copyprop.c (propagate_copy): When copy propagating + pointers, abort if the two pointers don't have identical memory + tags. + +2003-09-16 Jeff Law <law@redhat.com> + + * tree-ssa-ccp.c (visit_stmt): Do not set DONT_SIMULATE_AGAIN + just because a statement as virtual definitions. + (likely_value): A CALL_EXPR is assumed to return a VARYING + result, regardless of its operands. + +2003-09-15 Jason Merrill <jason@redhat.com> + + * tree-simple.c (is_gimple_val): Allow addresses of all decls. + (is_gimple_const): Allow addresses of all non-weak statics. + * tree-ssa-ccp.c (fold_stmt): Return bool. + * tree-flow.h: Adjust prototype. + * tree-ssa-dom.c (optimize_stmt): If folding changed stuff, we + need to recalculate the vops. + +2003-09-13 Diego Novillo <dnovillo@redhat.com> + + Fix PR optimization/12268 + * tree-dfa.c (add_referenced_var): Call-clobbered pointers may + point to global memory. + +2003-09-13 Jason Merrill <jason@redhat.com> + + * c-common.c (c_apply_type_quals_to_decl): Unset TREE_READONLY for + types with constructors. + Remove superfluous references to TREE_TYPE (decl). + +2003-09-13 Diego Novillo <dnovillo@redhat.com> + + * opts.c (decode_options): Enable must-alias optimization by default. + * tree-dfa.c (get_expr_operands): Always call add_stmt_operand when + dealing with ADDR_EXPR nodes. + (add_stmt_operand): If the variable has an alias set + of size zero, abort. + Call get_base_symbol() to retrieve the variable from an ADDR_EXPR + node. + (compute_alias_sets): Deep copy the aliases array when triggering + the alias grouping heuristic. + Don't group aliases if -ftree-must-alias is given. + * tree-must-alias.c (tree_compute_must_alias): Call + dump_referenced_vars when doing detailed dumps. + Rename promoted_vars to vars_to_rename. Update all users. + (find_addressable_vars): Always mark statements modified. + (promote_var): Also mark aliases of promoted variable to be + renamed. + Call find_variable_in and remove_element_from to update varrays for + call-clobbered variables and alias sets. + (find_variable_in): New local function. + (remove_element_from): New local function. + * varray.c (varray_copy): New function. + * varray.h (varray_copy): Declare. + +2003-09-13 Diego Novillo <dnovillo@redhat.com> + + * tree-flow-inline.h (is_optimizable_addr_expr): Remove. Update + all users. + * tree-ssa-dom.c (optimize_stmt): Do not propagate SSA names from + redundant expressions across abnormal edges. + +2003-09-13 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (remove_unreachable_blocks): Clean up. + (debug_tree_bb_n): New. + (is_ctrl_structure): Remove LOOP_EXPR. + * tree-flow.h (debug_tree_bb_n): Declare. + +2003-09-12 Andrew Macleod <amacleod@redhat.com> + + * tree-ssa-live.c (calculate_live_on_entry): Use default_def to add + addition checks to live on entry calculations. + * tree-ssa.c (print_exprs_edge): New debug output function. + (coalesce_abnormal_edges): Add basic block information to output. + (coalesce_ssa_name): Use default_def instead of trying to compute live + on entry variables. + +2003-09-12 Diego Novillo <dnovillo@redhat.com> + + * tree-optimize.c (tree_rest_of_compilation): Set TREE_ASM_WRITTEN + for functions that have errors. + +2003-09-12 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-pre.c (graph_dump_file, graph_dump_flags): Remove + unused variables. + +2003-09-11 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (reset_down_safe): Make test less conservative. + (cba_search_start_from): Start from abnormal edge arguments, too. + (cba_search_continue_from_to): Ditto here. + +2003-09-11 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c: s/#if ENABLE_CHECKING/#ifdef ENABLE_CHECKING/g. + Add more comments to DFS searching functions. + (cba_search_reach_from_to): Remove empty function. + (code_motion): Remove #if 0'd code. + (pre_expression): Ditto. + * tree.h (tree_dump_index): Remove TDI_predot. + * tree-dump.c (dump_files): Ditto. + +2003-09-11 Jason Merrill <jason@redhat.com> + + Make EDGE_FALLTHRU meaningful for tree-cfg. + * tree-cfg.c (make_edges): Set EDGE_FALLTHRU on fallthrough edge. + (make_exit_edges): Likewise. + (make_ctrl_stmt_edges): Don't set EDGE_FALLTHRU on edges into a + control structure. + (handle_switch_fallthru): Clear EDGE_FALLTHRU after inserting a goto. + (find_insert_location): Only insert after a CALL_EXPR or MODIFY_EXPR. + (bsi_insert_on_edge_immediate): Count outgoing abnormal edges. + Insert before all control stmts. + (bsi_link_after): Handle a block with nops after the last stmt. + + Rename some things to clarify difference between "control structures" + (i.e. COND_EXPR) and "control statements" (also GOTO_EXPR). + * basic-block.h (BB_CONTROL_STRUCTURE): Rename from BB_CONTROL_EXPR. + * tree-cfg.c (REMOVE_NON_CONTROL_STRUCTS): Rename from + REMOVE_NON_CONTROL_STMTS. + (REMOVE_CONTROL_STRUCTS): Rename from REMOVE_CONTROL_STMTS. + (make_ctrl_stmt_edges): Move GOTO_EXPR/RETURN_EXPR handling here... + (make_exit_edges): ...from here. + (is_ctrl_altering_stmt): Don't accept GOTO_EXPR/RETURN_EXPR. + (is_ctrl_structure): Renamed from old is_ctrl_stmt. + (is_ctrl_stmt): New fn. + (bsi_move_to_bb_end): Use it. + (stmt_starts_bb_p): Use is_ctrl_stmt and is_ctrl_altering_stmt. + * tree-flow.h: Add prototype. + * tree-ssa-ccp.c, tree-ssa-dom.c: Update for name changes. + +2003-09-10 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (ephi_has_bottom): Remove dead function. + (ephi_has_unsafe_arg): New function. + (compute_down_safety): Use it. + (reset_down_safe): Continue search on abnormal edges, too. + +2003-09-10 Jason Merrill <jason@redhat.com> + + * gimplify.c (gimplify_asm_expr): Add post_p parm. + (get_initialized_tmp_var): Add post_p parm. + (internal_get_tmp_var): Likewise. + (gimplify_expr, get_formal_tmp_var): Pass it. + * c-simplify.c (gimplify_decl_stmt): Pass it. + * tree-simple.h: Adjust prototype. + + * tree-cfg.c (make_call_expr_edges): Break out from... + (make_exit_edges): ...here. Check TREE_NOTHROW. + (is_ctrl_altering_stmt): Check TREE_NOTHROW. + +2003-09-10 Paul Brook <paul@nowt.org> + + * gimplify.c (gimplify_compound_lval): Treat REALPART_EXPR and + IMAGPART_EXPR the same as COMPONENT_REF. + * tree-simple.c (is_gimple_addr_expr_arg): Ditto. + (is_gimple_lvalue): Remove REALPART_EXPR and IMAGPART_EXPR. + +2003-09-10 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c (decl_name_str): New local function. + (pp_c_direct_declarator): Call it. + (pp_c_primary_expression): Call it. + (pp_c_id_expression): Call it. + (pp_c_statement): Call it. + +2003-09-10 Diego Novillo <dnovillo@redhat.com> + + * tree-pretty-print.c (dump_generic_node): Change string used to + display _DECL nodes with no DECL_NAME. + +2003-09-10 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_referenced_var): Handle cases when argument + walk_state is NULL. + (add_referenced_tmp_var): New function. + * tree-flow.h (add_referenced_tmp_var): Declare it. + * tree-ssa-pre.c (pre_expression): Call it. + * tree-ssa-live.c (create_ssa_var_map): Add checking for variables + being in real and virtual operands. + +2003-09-01 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + Jeff Law <law@redhat.com> + + * tree-flow.h (remove_unreachable_blocks): Declare. + * tree-cfg.c (remove_unreachable_blocks): Export. Return true + if blocks were removed. + * tree-ssa-dom.c (optimize_block, optimize_stmt): Record whether + the cfg has changed. Schedule jump threading. If a block + has more than one pred, then do not record equivalences created + by a controlling COND_EXPR. + (edges_to_redirect, redirection_targets): New variables. + (thread_edge): Split out of optimize_block. + (tree_ssa_dominator_optimize); Remove unreachable blocks and + recompute dominator tree when the cfg changes. + +2003-09-07 Steven Bosscher <steven@gcc.gnu.org> + + * c-tree.h: Don't declare c_genericize, it's already + declared in c-common.h. + +2003-09-07 Steven Bosscher <steven@gcc.gnu.org> + + Fix PR optimization/12198 + * tree-cfg.c (value_matches_some_label): Handle integer + case ranges. + +2003-09-06 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-iterator.h (tsi_iterator_update): Added TSI_CHAIN_START, + TSI_CHAIN_END, TSI_CONTINUE_LINKING and comments. + (tsi_link_chain_before, tsi_link_chain_after): Declare. + * tree.c (tsi_link_chain_before, tsi_link_chain_after): New. + (tsi_link_before, tsi_link_after): Handle new TSI_... + positions. + +2003-09-06 Diego Novillo <dnovillo@redhat.com> + + * varray.c (element): Add entry for 'tree *'. + * varray.h (enum varray_data_enum): Add VARRAY_DATA_TREE_PTR. + (union varray_data_tag): Add entry for 'tree *'. + (VARRAY_TREE_PTR_INIT): Define. + (VARRAY_TREE_PTR): Define. + (VARRAY_PUSH_TREE_PTR): Define. + (VARRAY_TOP_TREE_PTR): Define. + * tree-cfg.c: Replace uses of VARRAY_GENERIC_PTR with + VARRAY_TREE_PTR when accessing operand arrays. + * tree-ssa-ccp.c: Likewise. + * tree-ssa-copyprop.c: Likewise. + * tree-ssa-dce.c: Likewise. + * tree-ssa-dom.c: Likewise. + * tree-ssa-live.c: Likewise. + * tree-ssa-pre.c: Likewise. + * tree-dfa.c: Likewise. + * tree-ssa.c: Likewise. + * tree-flow.h (struct operands_d): Remove 'skip' GC markers from + all fields. + (struct dataflow_d): Likewise. + +2003-09-05 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_referenced_vars): Re-enable .GLOBAL_VAR + optimization. + +2003-09-05 Daniel Berlin <dberlin@dberlin.org> + + * tree.h (tree_eref_common): Make stmt a tree, not a tree *. + * tree-ssa-pre.c: Transform all tree *'s to tree. + +2003-09-05 Paul Brook <paul@nowt.org> + + * tree.h (enum tree_index): Delete TI_SIGNED_SIZE_TYPE here. + (signed_size_type_node): No longer a member of global_trees. + * c-common.h (enum c_tree_index): New member CTI_SIGNED_SIZE_TYPE. + (signed_size_type_node): Moved, now a member of c_global_trees. + +2003-09-05 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_referenced_vars): Temporarily disable + .GLOBAL_VAR optimization. + +2003-09-04 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c: Add overview. + * tree-alias-ander.c: Add overview and more specific comments on what + each function does. + +2003-09-04 Diego Novillo <dnovillo@redhat.com> + + * tree-optimize.c (tree_rest_of_compilation): Return if errorcount + or sorrycount are non-zero. + +2003-09-04 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (cleanup_tree_cfg): Traverse basic blocks + with FOR_EACH_BB. + (remove_useless_stmts_and_vars): Likewise. + * tree-ssa-dom.c (tree_ssa_dominator_optimize): Likewise. + * tree-ssa.c (rewrite_into_ssa): Likewise. + * tree-dfa.c (remove_all_phi_nodes_for): Make sure that the new + list of PHI nodes is NULL-terminated. + Add sanity checks to make sure all the PHI nodes for variables to + rename are gone. + +2003-09-04 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (struct walk_state): Add field 'num_calls'. + (add_call_clobber_ops): New local function. + (add_call_read_ops): New local function. + (get_expr_operands): Call them. + (add_stmt_operand): Call-clobbered variables are always added to + virtual operands. + (find_referenced_vars): If the number of call-clobbered variables + and number of call sites is larger than a certain threshold, group + all call-clobbered variables under .GLOBAL_VAR. + (find_vars_r): Count the number of call sites. + Don't add .GLOBAL_VAR to the list of referenced variables. + (add_referenced_var): If the addressable variable is an array, + register alias set of the type of the elements, not the type of the + array. + * tree-ssa-dom.c (mark_new_vars_to_rename): Rename from + find_new_vars_to_rename. Update all users. + Before scanning the statement for new operands, mark the existing + virtual operands to be renamed again. + (optimize_stmt): Also check for newly exposed variables when doing + redundancy elimination. + * tree-ssa.c (rewrite_into_ssa): Don't abort when rename_count is + greater than 2. Simply stop trying at 3. + (prepare_operand_for_rename): New function. + (mark_def_sites): Call it. + (rewrite_stmt): Don't check if the operand is an SSA_NAME before + calling rewrite_operand. + (rewrite_operand): Don't abort if the operand was already an + SSA_NAME. Ignore it. + +2003-09-03 Richard Henderson <rth@redhat.com> + + * tree-optimize.c (set_save_expr_context, clear_decl_rtl, + tree_rest_of_compilation): Merge from mainline new file. + * Makefile.in (tree-optimize.o): Update. + * c-semantics.c (expand_stmt_toplev): New. + * c-common.h (expand_stmt_toplev): Declare. + * c-lang.c, objc/objc-lang.c (LANG_HOOKS_RTL_EXPAND_STMT): Use it. + +2003-09-03 Richard Henderson <rth@redhat.com> + + * gimplify.c (gimplify_switch_expr): Leave the outermost cast + as part of the switch condition. + +2003-09-02 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree.o): Add dependency on $(BASIC_BLOCK_H) and + $(TREE_FLOW_H) + * tree.c: Include basic-block.h and tree-flow.h + (tsi_link_after): Adjust basic block tree pointers when inserting a + new COMPOUND_EXPR. + +2003-09-02 Richard Henderson <rth@redhat.com> + + * c-decl.c (finish_function): Fix misapplied patch. Don't + free_after_parsing or free_after_compilation. For real this time. + +2003-09-01 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (finalize_1): Remove unnecessary call to + insert_euse_in_preorder_dt_order. + (code_motion): Ditto. + (pre_expression): Ditto. + +2003-09-01 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + Jeff Law <law@redhat.com> + + * basic-block.h (BB_LOOP_CONTROL_EXPR): Remove. + * c-simplify.c (gimplify_c_loop): Create loops in a better shape. + * cfgloop.h (create_loop_notes): Declare. + * cfgloopmanip.c (create_loop_notes): New. + * explow.c (probe_stack_range): Don't produce loop notes when we + recreate them. + * expr.c (emit_block_move_via_loop): Ditto. + * gimplify.c (build_and_jump): Export. + (gimplify_loop_expr): Don't produce LOOP_EXPRs. + * toplev.c (rest_of_compilation): Recreate loop notes if needed. + * tree-cfg.c (make_loop_expr_edges, make_loop_expr_blocks): Removed. + (find_contained_blocks, make_ctrl_stmt_edges, + remove_useless_stmts_and_vars, stmt_ends_bb_p, bsi_insert_before, + find_insert_location, bsi_insert_on_edge_immediate, + merge_tree_blocks): Remove handling of LOOP_EXPRs. + (remove_stmt): Remove handling of BB_LOOP_CONTROL_EXPR. + (find_taken_edge): Remove comment on LOOP_EXPRs. + (dump_tree_bb): Don't dump loop-related information. + (is_loop_stmt, is_latch_block_for): Removed. + (find_insert_location): Handle TRY_CATCH and TRY_FINALLY. + * tree-flow.h (is_loop_stmt, loop_body, set_loop_body, + is_latch_block_for): Removed. + * tree-dfa.c (get_stmt_operands): Don't handle LOOP_EXPRs. + * tree-simple.c (is_gimple_stmt): Remove handling of LOOP_EXPRs. + * tree-simple.h: Remove LOOP_EXPRs from gimple grammar comment. + (build_and_jump): Declare. + * tree-ssa.c (remove_annotations_r): Don't handle LOOP_EXPRs. + +2003-08-29 Daniel Berlin <dberlin@dberlin.org> + + * opts.c (decode_options): Turn on SSAPRE by default. + +2003-08-29 Jason Merrill <jason@redhat.com> + + * builtins.c (simplify_builtin): Make sure that the replacement + has the same type as the original expression. + (simplify_builtin_strpbrk): Fix type of COMPOUND_EXPR. + (simplify_builtin_strncpy, simplify_builtin_memcmp): Likewise. + (simplify_builtin_strncmp, simplify_builtin_strncat): Likewise. + (simplify_builtin_strspn, simplify_builtin_strcspn): Likewise. + (simplify_builtin_fputs, simplify_builtin_sprintf): Likewise. + +2003-08-28 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * builtins.c (expand_builtin): Expand BUILT_IN_STACK_SAVE and + BUILT_IN_STACK_RESTORE. + * builtins.def (BUILT_IN_STACK_SAVE, BUILT_IN_STACK_RESTORE): New. + * gimplify.c (build_stack_save_restore): New functions. + (struct gimplify_ctx): New field save_stack. + (gimplify_bind_expr, gimplify_call_expr): Arrange save of stack on + BIND_EXPR entry and restore on exits. + * stmt.c (expand_stack_alloc): Saving of stack removed. + (expand_stack_save, expand_stack_restore): New. + * tree.h (expand_stack_save, expand_stack_restore): Declare. + +2003-08-28 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_vdef): Check for duplicate voperands first. + Handle SSA_NAME in voperands. + (add_vuse): Likewise. + +2003-08-27 Diego Novillo <dnovillo@redhat.com> + + * tree-flow.h (var_ann_d): Convert is_in_va_arg_expr into a + bitfield. + +2003-08-27 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c: Update comments to reflect reality. + (insert_one_operand): Remove #if'0d code. + +2003-08-27 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * gcov.c (typedef struct arc_info): New field cs_count. + (accumulate_line_counts): Find cycles correctly. + +2003-08-27 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (compute_du_info): Move #if ENABLE_CHECKING up one + line. + +2003-08-27 Daniel Berlin <dberlin@dberlin.org> + + * tree.h (struct ephi_arg_d): New structure. + (struct eref_common): Remove non-used members, move some members + elsewhere. + (struct ephi_node): Ditto. + + * tree-optimize.c (optimize_function_tree): Move PRE before DCE. + + * tree.c (tree_size): use sizeof (struct ephi_arg_d) for ephi's. + + * tree-pretty-print.c (dump_generic_node): Re-teach to pretty + print euses/ephis/etc given new structures, members, and + relationships. + + * tree-ssa-pre.c (fixup_domchildren): Removed. + (a_dom_b): Ditto. + (calculate_preorder): Ditto. + (defs_match_p): Ditto. + (defs_y_dom_x): Ditto. + (compute_can_be_avail): Ditto. + (reset_can_be_avail): Ditto. + (reset_later): Ditto. + (compute_later): Ditto. + (repair_*): Ditto. + (set_replacement): Ditto. + (remove_ephi): Ditto. + (set_expruse_def): Ditto. + (occ_compare): Ditto. + (defs_hash_expr): Ditto. + (compute_dt_preorder): Ditto + (search_dt_preorder): Ditto. + (ephi_operand_for_pred): Ditto. + (injured_ephi_operand): Ditto. + (compute_stops): New function. + (occ_identical_to): Ditto. + (require_phi): Ditto. + (do_ephi_df_search_1): Ditto. + (do_ephi_df_search): Ditto. + (any_operand_injured): Ditto. + (compute_du_info): Ditto. + (add_ephi_use): Ditto. + (insert_one_operand): Ditto. + (add_ephi_pred): Ditto. + (created_phi_preds): New bitmap. + (dfn) Removed static variable. + (idom_of_ephi): Ditto. + (avdefs): Move into expr_info). + (struct ephi_use_entry): New structure for EPHI uses. + (struct ephi_df_search): New structure for depth first searchs. + (cant_be_avail_search): Implementation of structure for + cant_be_avail search. + (stops_search): Ditto for stops. + (replacing_search): Ditto for replacing_search. + (do_proper_save): Arguments changed, callers updated. + (create_ephi_node): Use sizeof (struct ephi_arg_d). + (ephi_has_bottom): Rewrite for updated ephi-pred handling. + (ephi_will_be_avail): Rewrite in terms of CANT_BE_AVAIL and STOPS. + (expr_phi_insertion): Remove dead code. + Update for new flags. + (insert_occ_in_preorder_dt_order_1): Only insert one ephi-pred per + block. + Fix exit occurence handling. + (rename_1): Remove occs stuff. + Update for new ephi-pred handling. + (reset_down_safe): Update for new ephi-pred handling. + (compute_down_safe): Ditto. + (can_insert): Ditto. + (insert_one_operand): Split out from finalize_1. + (finalize_1): Update for new ephi-pred handling. + Only insert non-pointless, will-be-avail phis, rather than *all* + ephis. + (get_temp): New function. Hand us the right temporary for a given + EPHI/EUSE. + (code_motion): Use EREF_TEMP again, now that we can do it + properly. + +2003-08-26 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * builtins.c (expand_builtin): Handle STACK_ALLOC. + * builtins.def (BUILT_IN_STACK_ALLOC): New. + * c-simplify.c (gimplify_decl_stmt, c_gimplify_stmt, + gimplify_compound_literal_expr): Arrange explicit stack allocation. + * expr.c (expand_expr): Handle deferred variables. + * stmt.c (expand_stack_alloc): New. + * tree-simple.c (is_gimple_val): Prevent ADDR_EXPRs of vla's from + being reduced. + * tree.h (expand_stack_alloc): Declare. + +2003-08-26 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa.c (build_dominator_tree): Use FOR_EACH_BB. + +2003-08-26 Jason Merrill <jason@redhat.com> + + * tree-simple.c (is_gimple_val): Also disallow memory vars. + +2003-08-25 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * integrate.c (copy_decl_for_inlining): Reset DECL_TOO_LATE. + +2003-08-25 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa-dom.c (optimize_block): Handle empty source block. + + * tree-ssa-dom.c (optimize_block): Handle case when dominance + tree children have also other sucessors. Add dump to jump + threading. + +2003-08-25 Jason Merrill <jason@redhat.com> + + * c-simplify.c (mark_labels_r): New fn. + (gimplify_decl_stmt): Use it to mark labels in static initializers. + * tree-simple.c (is_gimple_initializer): Remove. + (is_gimple_reg_type): New fn. + (is_gimple_reg): Use it. Handle SSA_NAMEs properly. + * tree-simple.h: Adjust. + * gimplify.c (gimplify_expr) <CONSTRUCTOR>: Do nothing here. + + * gimplify.c (create_tmp_var): Set DECL_IGNORED_P. + + * tree-inline.c (initialize_inlined_parameters): Improve error + recovery. + + * gimplify.c (gimplify_boolean_expr): Just replace with a COND_EXPR. + +2003-08-25 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (get_expr_operands): Don't create shared operands when + folding *&VAR expressions. + +2003-08-24 Diego Novillo <dnovillo@redhat.com> + + * tree-flow.h (struct var_ann_d): Add field default_def. + (widen_bitfield): Declare. + (set_default_def): Declare. + (default_def): Declare. + * tree-flow-inline.h (set_default_def): New inline function. + (default_def): New inline function. + * tree-dfa.c (dump_variable): Display default_def, if set. + * tree-simple.c (is_gimple_reg): Check for DECL_P before checking + for DECL_EXTERNAL. + * tree-ssa-dom.c (add_expr_propagated_p): Remove. Update all + users. + (find_new_vars_to_rename): New local function. + (tree_ssa_dominator_optimize): Add new argument vars_to_rename. + Change return type to void. Update all users. + (optimize_block): Add new argument vars_to_rename. Update all + users. + If the call to optimize_stmt returns true, add the statement to the + list of statements to re-scan for operands. + After optimizing the block and its dominator children, call + find_new_vars_to_rename for every statement that may have had new + symbols exposed. + (optimize_stmt): Change return type to bool. Return true if the + statement may have had new symbols exposed by optimization. + Add a sanity check for the value returned by lookup_avail_expr. + Create equivalences for more memory stores, not just the ones done + via INDIRECT_REF expressions. + Call widen_bitfield when optimizing stores to bitfields. + (lookup_avail_expr): Reformat comment. + * tree-ssa.c (rewrite_into_ssa): Remove local variable + addr_expr_propagated_p. + Clear out vars_to_rename before running dominator optimizations. + (check_for_new_variables): Remove. + (rewrite_stmt): Always register new definitions and virtual + definitions. + (register_new_def): Update comment. + (get_reaching_def): Update the default_def field for the variable + if it didn't have a reaching definition. + * tree-ssa-ccp.c (widen_bitfield): Declare it extern. + +2003-08-23 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (bsi_next_in_bb): Work correctly when the block ends + with start of BIND_EXPR. + +2003-08-23 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ander.c (andersen_op_assign): Fix to join the operands, + the assign to the lhs. + +2003-08-23 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c (get_alias_var): Remove REFERENCE_EXPR. + (find_func_aliases): Fix some not quite right predicates, add ARRAY_REF + handling. + +2003-08-22 Jeff Law <law@redhat.com> + + * tree-dfa.c (compute_alias_sets): A memory tag used for stores can + not conflict with objects marked TREE_READONLY. + + * tree-ssa-ccp.c (fold_stmt): Optimize reads from constant strings. + +2003-08-22 Jason Merrill <jason@redhat.com> + + * tree-simple.c: Total overhaul to only check forms and remove + unnecessary predicates. + (is_gimple_const): Accept function addresses here. + Don't accept LABEL_DECL or RESULT_DECL. + (is_gimple_val): Accept EXC_PTR_EXPR here. + (is_gimple_lvalue): Rename from is_gimple_modify_expr_lhs. + Accept BIT_FIELD_REF, REALPART_EXPR and IMAGPART_EXPR here. + (is_gimple_addr_expr_arg): Replace with former is_gimple_varname. + (is_gimple_constructor_elt): Just check for CONSTRUCTOR. + (is_gimple_initializer): Just hand off to is_gimple_rhs. + (is_gimple_rhs): Recognize most expressions here. + (is_gimple_variable): New fn. + (is_gimple_id): Use it. Now static. + (is_gimple_reg): New fn. + (is_gimple_cast): Replace with former is_gimple_cast_op. + (is_gimple_constructor, is_gimple_expr): Remove. + (is_gimple_modify_expr, is_gimple_relop): Remove. + (is_gimple_binary_expr, is_gimple_unary_expr): Remove. + (is_gimple_call_expr, is_gimple_arglist): Remove. + (is_gimple_compound_lval, is_gimple_arrayref): Remove. + (is_gimple_compref, is_gimple_exprseq): Remove. + (is_gimplifiable_builtin): Remove. + * tree-simple.h: Adjust. + * gimplify.c (gimplify_conversion): Break out from gimplify_expr. + (gimplify_expr): Use is_gimple_reg predicate to force a temp. + <COMPONENT_REF>: Use gimplify_compound_lval. + <REALPART_EXPR, IMAGPART_EXPR>: Likewise. + <INDIRECT_REF>: Use is_gimple_reg predicate. + <MIN_EXPR, MAX_EXPR>: Use new gimplify_minimax_expr. + <TREE_LIST>: Reject. + (gimplify_tree_list, gimplify_component_ref): Remove. + (gimplify_compound_lval): Include REALPART_EXPR and IMAGPART_EXPR. + (gimplify_component_ref): Remove. + (gimplify_call_expr): Handle non-gimplifiable builtins and walking + the argument list here. + (gimplify_tree_list): Remove. + (gimplify_addr_expr): Use fb_either. + * tree-simple.h: Adjust. + * tree-alias-common.c (find_func_aliases): Update use of predicates. + +2003-08-21 Andrew Pinski <pinskia@physics.uc.edu> + + * tree-ssa.c (tree_ssa_useless_type_conversion): Check also the + precision of the type to make sure they are really useless type + conversions. + +2003-08-21 Diego Novillo <dnovillo@redhat.com> + + * tree-dump.c (dequeue_and_dump): Handle 'r' and 's' code classes. + +2003-08-21 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * c-pretty-print.c (print_c_tree): Create new pp object. + +2003-08-21 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa-dom.c (tree_ssa_dominator_optimize): Don't free hash tables + before statistics are made from them. + * tree-ssa.c (rewrite_into_ssa): Ditto. + +2003-08-21 Jason Merrill <jason@redhat.com> + + * tree-inline.c (copy_body_r): Don't convert when stripping &*. + Fix thinko in stripping *&. + +2003-08-21 Diego Novillo <dnovillo@redhat.com> + Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-cfg.c (stmt_starts_bb_p): Nonlocal and computed GOTO targets + always start a new block. + +2003-08-20 Jason Merrill <jason@redhat.com> + + * tree-pretty-print.c (dump_generic_node): Just print "<retval>" + for the RESULT_DECL. + + * c-simplify.c (make_type_writable, mostly_copy_tree_r): Remove. + (deep_copy_list, deep_copy_node): Remove. + + * expr.c (expand_expr): Don't check for 'r' or 's' if we're + checking IS_EXPR_CODE_CLASS. + * tree-dfa.c (may_access_global_mem_p): Likewise. + * tree-browser.c (browse_tree): Likewise. + * tree-ssa-pre.c (defs_hash_expr): Likewise. + * gimplify.c (gimplify_expr): Likewise. + (internal_get_tmp_var): Only copy TREE_LOCUS from an expr. + (mostly_copy_tree_r): Ignore decls here. + +2003-08-20 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c: Discard. Replace with same file from + mainline. Update all users. + (print_c_tree): New function. + * c-pretty-print.h (print_c_tree): Declare. + * tree-pretty-print.c: Update to use new pp_* primitives. + * c-simplify.c: Include c-pretty-print.h. + * Makefile.in (c-simplify.o): Add dependency on $(C_PRETTY_PRINT_H). + +2003-08-20 Roger Sayle <roger@eyesopen.com> + + * c-common.h (enum c_tree_index): Delete CTI_SIGNED_SIZE_TYPE. + (signed_size_type_node): No longer a member of c_global_trees. + * tree.h (enum tree_index): New member TI_SIGNED_SIZE_TYPE here. + (signed_size_type_node): Moved, now a member of global_trees. + +2003-08-20 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa-dom.c (optimize_block): Thread jump into empty + block correctly. + + * tree-cfg.c (linearize_cond_expr): Don't merge blocks if the + later has other predecessors. + +2003-08-19 Jason Merrill <jason@redhat.com> + + * c-typeck.c (build_array_ref): Also build ARRAY_REFs from + INDIRECT_REFs of ARRAY_TYPE. + + * tree-ssa.c (tree_ssa_useless_type_conversion): Also strip + conversions between pointer and reference types. + + * tree-dfa.c (get_stmt_operands): Just mark non-GIMPLE statements + as unmodified. + (find_referenced_vars): So we don't need to mark them here. + + * tree-inline.c (inline_data): Add retvar field. + (declare_return_variable): Set it. + (remap_decls): Use it. + (expand_call_inline): Tweak. + +2003-08-19 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * cfg.c (dump_edge_info): Add name for EDGE_LOOP_EXIT flag. + +2003-08-19 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-flow.h (struct var_ann_d): New field scope. + (struct stmt_ann_d): New field scope. + (propagate_copy): Declaration changed. + (fixup_var_scope): Declare. + * tree-cfg.c (make_blocks, make_cond_expr_blocks, + make_catch_expr_blocks, make_eh_filter_expr_blocks, + make_try_expr_blocks, make_loop_expr_blocks, make_switch_expr_blocks, + make_bind_expr_blocks, build_tree_cfg): Assign variables and statements + to scopes. + (assign_vars_to_scope): New. + * tree-ssa-copyprop.c (move_var_to_scope): New. + (copyprop_stmt): Pass scope of statement to propagate_copy. + (propagate_copy): Assign variable to the right bind_expr. + (fixup_var_scope): New. + * tree-ssa-dom.c (optimize_stmt): Pass scope of statement to + propagate_copy. + +2003-08-19 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg (bsi_move_after): New function. + (bsi_move_before): New function. + (bsi_move_to_bb_end): New function. + * tree-flow.h: Prototype new functions. + +2003-08-18 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ander.c: Remove doxygen markers. + (eq_to_var): remove. + (simple_cmp): Add. + (throwaway_global): Add. + (andersen_same_points_to_set): Handle ignoring global var aliasing the + right way here. + (andersen_may_alias): Use list_member to avoid stupid hack. + * tree-alias-common.c: Remove hacks for disabling global var aliasing. + +2003-08-17 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree.c (resize_phi_node): Initialize new entries. + +2003-08-17 Jeff Law <law@redhat.com> + + * tree-pretty-print.c (last_bb): Actually record the basic block, + not just its index. + (maybe_init_pretty_print): Corresponding changes. + (dump_generic_node, dump_vops): Test the actual block pointers, not + their indices. + + * tree-ssa-dom.c (optimize_block): Use equivalences from the + dominator tree walk to thread through conditional jumps at leafs in + the dominator tree. + + * tree-cfg.c (blocks_unreachable_p, remove_blocks): Use a bitmap + rather than a varray. + (REMOVE_ALL_STMTS, REMOVE_NO_STMTS): New defines for remove_bb. + (REMOVE_NON_CONTROL_STMTS, REMOVE_CONTROL_STMTS): Likewise. + (remove_unreachable_block): Use find_contained_blocks rather + than find_subblocks. If we have a COND_EXPR or SWITCH_EXPR which + is unreachable, but which has reachable children clear out the + condition and request all non-control statements be removed + from the block. + (remove_bb): Allow better control over what (if any) statements + are removed. All callers updated. + (find_subblocks): Remove. + (find_contained_blocks): Handle statements with no associated + basic block. + +2003-08-15 Andrew Pinski <pinskia@physics.uc.edu> + + * objc/objc-lang.c (LANG_HOOKS_GIMPLIFY_EXPR): Define + as the c gimplifier. + +2003-08-15 Jeff Law <law@redhat.com> + + * tree-cfg.c (cleanup_tree_cfg): Wipe out the dominator tree + if the number of basic blocks changes as a result of cfg cleanups. + * tree-flow.h (build_dominator_tree): Prototype. + * tree-ssa-dom.c (tree_ssa_dominator_optimize): Build the dominator + tree if it is not already available. + * tree-ssa.c (build_dominator_tree): New function. + (rewrite_into_ssa): Use it. + + * gimplify.c (gimplify_expr, cases NOP_EXPR, CONVERT_EXPR): If a + COMPONENT_REF is wrapped with a NOP_EXPR, then force the type of + the COMPONENT_REF to match the accessed field. Strip away + unnecessary type conversions and handle the case where all type + conversions were removed. + (case ARRAY_REF, COMPONENT_REF): Indicate to gimplify_array_ref + and gimplify_component_ref if we want an lvalue or not. + (gimplify_array_ref, gimplify_component_ref): Pass new argument + WANT_LVALUE through to gimplify_compound_lval. + (gimplify_compound_lval): If we do not want an lvalue and the + toplevel COMPONENT_REF's type does not match its field's type, + then wrap the COMPONENT_REF in a NOP_EXPR and force the + COMPONENT_REF's type to match its field's type. + (gimplify_modify_expr): If the RHS is a CALL_EXPR and the LHS + is not a gimple temporary, then force the RHS through a gimple + temporary, even if the call can not throw. + (create_tmp_var): Make sure not to lose the type's attributes + for the new variable. + * tree-ssa.c (tree_ssa_useless_type_conversion): New function. + * tree-flow.h (tree_ssa_useless_type_conversion): Prototype. + * tree-ssa-dom.c (optimize_stmt): Use tree_ssa_useless_type_conversion. + + * tree-cfg.c (remove_useless_stmts_and_vars): Catch more + useless statements created during the out-of-ssa pass. + +2003-08-14 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_block): Record equivalences created by + SWITCH_EXPRs. + + * tree-ssa-dom.c (optimize_stmt): Allow optimizing the RHS of + a RETURN_EXPR which contains an optimizable MODIFY_EXPR. + (lookup_avail_expr): Corresponding changes. + (avail_expr_hash, avail_expr_eq): Likewise. + + * tree-ssa-dom.c (optimize_stmt): Fix typo which prevented + stores with more than one VDEF from creating useful equivalences. + + * tree-dfa.c (get_expr_operands): Do not special case *0; + + * fold-const.c (fold, case INDIRECT_REF): Revert last change. + +2003-08-14 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (bsi_insert_on_edge_immediate): Only update the + container for the head tree of the next block if the new statement + needs to be linked to it. + +2003-08-13 Jeff Law <law@redhat.com> + + * fold-const.c (fold, case INDIRECT_REF): Optimize reads from + constant strings. + + * tree-cfg.c (remove_useless_stmts_and_vars): For a COND_EXPR + where the condition is a variable and the ELSE clause merely + sets that variable to zero, remove the ELSE clause. + + * tree-ssa-dom.c (optimize_stmt): Do not check the type of the + value returned by lookup_avail_expr. + +2003-08-13 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg.c (remove_stmt): Add new argument saying whether to remove + annotations and invalidate defs. Update all callers + (remove_bsi_from_block): Moved from bsi_remove, argument added. + (bsi_remove): Made into wrapper for remove_bsi_from_block. + +2003-08-13 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * tree-ssa-dom.c (optimize_stmt): Call get_stmt_operands. + +2003-08-12 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_stmt): Record equivalences created + by memory stores. + +2003-08-12 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (find_insert_location): Handle other control + statements that may be at the end of the block. + +2003-08-12 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * Makefile.in (tree-pretty-print.o): Add tree-iterator.h dependency. + * tree-pretty-print.c: Include tree-iterator.h. + (dump_generic_node): Avoid recursing into COMPOUND_EXPRs. + +2003-08-12 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_stmt): Optimize ABS_EXPR when we know + the sign of the source operand. + + * tree-ssa-dom.c (optimize_stmt): Rewrite TRUNC_DIV_EXPR and + TRUNC_MOD_EXPR even if the LHS is not an SSA variable. Do not + enter the new expression in the hash tables if !may_optimize_p. + Also try GE_EXPR to see if this transformation is safe. + + * tree-ssa-dom.c (optimize_stmt): Fix typo in last change which + prevented recording equivalences created by IOR_EXPR. + + * tree-ssa-dom.c (optimize_stmt): Record that the destination of + a MODIFY_EXPR nonzero if the RHS contains an IOR with a nonzero + constant. Turn DIV/MOD by a power of 2 into SHIFT/AND if we know + dividend is positive. + +2003-08-11 Jeff Law <law@redhat.com> + + * fold-const.c (fold, cases NE_EXPR and EQ_EXPR): Fold equality + comparisons of non-weak symbol addresses against zero. + + * tree-ssa-ccp.c (fold_stmt): Strip unnecessary NOP_EXPRs from + the folded result. + + * gimplify.c (gimplify_expr, case INDIRECT_REF): Copy the base + object into a temporary if it's in static memory or is addressable. + +2003-08-11 Steven Bosscher <steven@gcc.gnu.org> + + * tree-alias-common.h (struct tree_alias_ops): Add a semicolon, fix + bootstrap. + +2003-08-10 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (compute_may_aliases): Move points-to initialization from + here. + (find_referenced_vars): To here. + (get_memory_tag_for): Use new same_points_to_set function. + + * tree-alias-common.h (struct tree_alias_ops): Remove doxygen markers. + Add same_points_to_set function to struct. + (same_points_to_set): New function. + + * tree-alias-common.c (we_created_global_var): A bit of magic to ignore + global var aliasing when we didn't create global var. This will go + away soon + (same_points_to_set): New function. + + * tree-alias-andersen.c (struct andersen_alias_ops): Add + andersen_same_points_to_set. + (andersen_same_points_to_set): New function. Return true if the two + variables have the same points-to set. + + * opts.c (common_handle_option): Add "none" as a points-to option. + +2003-08-10 Paul Brook <paul@nowt.org> + + * doc/install.texi: Mention --enable-languages=f95. + +2003-08-09 Daniel Berlin <dberlin@dberlin.org> + + * tree-pretty-print.c (dump_vops): check bb->tree_annotations, not + bb->aux. + +2003-08-08 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg.c (bsi_insert_on_edge_immediate): If there's only + one statement in the block, and it's an empty statement, replace it. + +2003-08-08 Jason Merrill <jason@redhat.com> + + * c-decl.c (c_expand_body_1): Restore support for + !keep_function_tree_in_gimple_form. + (finish_function, c_expand_deferred_function): Do TDI_inlined dump. + + * gimplify.c (voidify_wrapper_expr): Set TREE_SIDE_EFFECTS on the + wrapper if we insert a MODIFY_EXPR. + +2003-08-07 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (GTFILES): Add tree-ssa.c, tree-dfa.c and + tree-ssa-ccp.c. + (gt-tree-ssa.h, gt-tree-dfa.h, gt-tree-ssa-ccp.h): Depend on + s-gtype. + * tree-dfa.c (struct clobber_data_d): Remove. Update all users. + (struct alias_map_d): Mark for garbage collection. + (struct walk_state): Add fields 'is_not_gimple' and + 'is_va_arg_expr'. + (clobber_vars_r): Remove. Update all users. + (get_stmt_operands): Abort if attempting to get operands from a + non-GIMPLE statement. + (get_expr_operands): Likewise. + Do not force a virtual operand when scanning VA_ARG_EXPR. + (add_stmt_operand): If the variable has hidden uses, mark the + statement as having volatile operands and return. + If the variable occurs inside a VA_ARG_EXPR, add it as a virtual + operand. + (add_immediate_use): Call VARRAY_TREE_INIT instead of + VARRAY_GENERIC_PTR_INIT. + (dump_variable): Check is_in_va_arg_expr flag. + (compute_may_aliases): Move code to find variables ... + (find_referenced_vars): ... here. + (find_vars_r): Abort if we find a non-GIMPLE expression + unexpectedly. + Mark variables found inside a VA_ARG_EXPR. + Do not scan arguments for non-GIMPLE CALL_EXPRs. + Remove local variable saved_is_store. + Reformat some code for readability. + (add_referenced_var): If the variable is already marked as having + hidden uses, ignore it. + If the variable is found inside a non-GIMPLE expression, mark it. + If the variable is found inside a VA_ARG_EXPR, mark it. + + * tree-flow.h (struct var_ann_d): Add field is_in_va_arg_expr. + (find_referenced_vars): Declare. + * tree-optimize.c (optimize_function_tree): Call + find_referenced_vars before computing may aliases. + + * tree-ssa-dce.c (need_to_preserve_store): Do not check if the + variable has hidden uses. + * tree-ssa-live.c (type_var_init): Likewise. + + * tree-ssa-ccp.c (ssa_edges): Mark for garbage collection. + (tree_ssa_ccp): Use VARRAY_.*_EDGE calls to manipulate the varray + of CFG edges. + (add_control_edge): Likewise. + (initialize): Likewise. + * tree-ssa.c (struct def_blocks_d): Mark for garbage collection. + (struct var_value_d): Likewise. + (def_blocks_free): Remove. Update all users. + (rewrite_into_ssa): Do not specify free function when creating + def_blocks and currdefs. + Call sbitmap_free instead of free. + (mark_def_sites): Call sbitmap_free instead of free. + (set_def_block): Use GC allocation. + (set_livein_block): Likewise. + (insert_phi_nodes): Adjust name of varray def_maps when creating it. + (insert_phis_for_deferred_variables): Remove call to BITMAP_XFREE. + (insert_phi_nodes_for): Use GC allocation for phi_insertion_points. + (init_tree_ssa): Remove typecast in call to memset. + (set_value_for): Use GC allocation. + (get_def_blocks_for): Remove typecast in call to htab_find. + * varray.c (element): Add entry for struct edge_def *. + * varray.h (enum varray_data_enum): Add VARRAY_DATA_EDGE. + (union varray_data_tag): Add field of type struct edge_def *. + (VARRAY_EDGE_INIT): Define. + (VARRAY_EDGE): Define. + (VARRAY_PUSH_EDGE): Define. + (VARRAY_TOP_EDGE): Define. + +2003-08-06 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (handle_switch_fallthru): Do not abort when the last + statement of the case block needs to be the last statement of the + block. + (find_insert_location): Fix typo. + +2003-08-06 Steven Bosscher <steven@gcc.gnu.org> + + * tree-dfa.c (remove_phi_arg): When the PHI no longer has + arguments, don't remove it here, but do so... + (remove_phi_arg_num): ...from here. + +2003-08-05 Jason Merrill <jason@redhat.com> + + * gimplify.c (gimplify_cond_expr): Gimplify shortcut expansion in + a conditional context. + + * tree-cfg.c (make_catch_expr_blocks): Don't change next_block_link. + (make_eh_filter_expr_blocks): Likewise. + + * tree-dfa.c (add_referenced_var): Static locals are call + clobbered. + +2003-08-05 Steven Bosscher <steven@gcc.gnu.org> + + * tree-dfa.c (add_phi_arg): Allow PHI capacity to grow. + * tree-flow.h (add_phi_arg): Adjust prototype. + * tree-ssa-pre.c (code_motion): Adjust call. + * tree-ssa.c (rewrite_block): Likewise. + * tree.c (resize_phi_node): New function. + * tree.h (resize_phi_node): Add prototype. + +2003-08-05 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_block): Be more aggressive about + creating equivalences from PHI nodes. + + * tree-ssa-dom.c (optimize_stmt): Strip away certain NOP_EXPRs + before determining if we have an equivalence to enter into + the const_and_copies table. + + * tree-ssa-dce.c (remove_dead_stmts): Iterate backwards through the + basic blocks removing dead statements. Within each block iterate + backwards through the statements removing those which are dead. + + * tree-ssa-optimize.c (optimize_function_tree): Call + remove_useless_stmts_and_vars before building the flow graph. + * tree-cfg.c (remove_useless_stmts_and_vars): Rename argument from + first_iteration to remove_unused_vars. + + * tree-cfg.c (remove_unreachable_blocks): Remove blocks in reverse + order. + (remove_bb): Remove unwanted call to bsi_next. + (bsi_remove): Refine code which removes useless COMPOUND_EXPRs to allow + removal if one of the arms is not associated with a basic block. + (remove_stmt): Improve check for testing when a basic block head/end + pointer needs to be updated when removing a COMPOUND_EXPR. + + * tree-cfg.c (phi_alternatives_equal): New function. + (linearize_cond_expr): Allow linearization if the PHI nodes at the + target have equivalent arguments for the incoming edges from the THEN + and ELSE clauses. + + * tree-ssa-dce.c (mark_tree_necessary): Empty statements may be + necessary. + (process_worklist): Handle any incoming abnormal edges the first + time a statement in each block becomes executable. + + * tree-ssa-ccp.c (substitute_and_fold): Substitute known + constants into PHI nodes. + +2003-08-04 Sebastian Pop <s.pop@laposte.net> + + * basic-block.h: Declare bb_ann_d. + (basic_block_def): Add a field tree_annotations. + * cfg.c (entry_exit_blocks): Initialize tree_annotations to NULL. + * cfghooks.c: Remove the definition of cfg_level. + (rtl_register_cfg_hooks): Remove the initiallization of cfg_level. + * cfghooks.h (cfg_hooks): Add cfgh_loop_optimizer_init, and + cfgh_loop_optimizer_finalize. + (loop_optimizer_init, loop_optimizer_finalize): New macros. + (cfg_level): Remove. + * cfgloop.h (loop_optimizer_init, loop_optimizer_finalize): Rename + to rtl_loop_optimizer_init and rtl_loop_optimizer_finalize. + * cfgrtl.c (rtl_loop_optimizer_init, rtl_loop_optimizer_finalize): + Declare, and register them in rtl_cfg_hooks and cfg_layout_rtl_cfg_hook. + * loop-init.c (loop_optimizer_init, loop_optimizer_finalize): Rename + to rtl_loop_optimizer_init and rtl_loop_optimizer_finalize. Remove + the checks to cfg_level. + * tree-cfg.c (block_tree_ann_obstack, first_block_tree_ann_obj): New. + (create_blocks_annotations, create_block_annotation, + free_blocks_annotations, clear_blocks_annotations): New functions. + (tree_loop_optimizer_init, tree_loop_optimizer_finalize): New + functions. Register them in tree_cfg_hooks. + (build_tree_cfg, dump_tree_bb, delete_tree_cfg, tree_split_edge): Use + create_blocks_annotations instead of alloc_aux_for_blocks, + create_block_annotation instead of alloc_aux_for_block, + .tree_annotations instead of .aux, + free_blocks_annotations instead of free_aux_for_blocks. + (tree_register_cfg_hooks): Remove initialization of cfg_level. + * tree-flow-inline.h (bb_ann): Use .tree_annotations. + * tree-flow.h: Update comment. + +2003-08-04 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * Makefile.in (c-pretty-print.o): Add TREE_H and C_TREE_H dependencies. + +2003-08-01 Paul Brook <paul@nowt.org> + + * Makefile.in (GMPINC): Set and use. + (GMPLIBS): Set it. + * configure.in: Add test and switches for the GMP library. + (all_need_gmp): Set from config-lang.in. + * sourcebuild.texi: Document need_gmp. + * configure: regen + +2003-08-01 Steven Bosscher <steven@gcc.gnu.org> + + * tree-inline.c (expand_calls_inline): Fix comments. + +2003-07-31 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa-ccp.o): Depend on $(EXPR_H). + * builtins.c (c_strlen): Remove static declaration. + (simplify_builtin_fputs): Remove static declaration. + (simplify_builtin_sprintf): New local function. + (expand_builtin_sprintf): Remove by surrounding with #if 0. + (expand_builtin): Add BUILT_IN_SPRINTF to the list of built-ins + handed over to simplify_builtin. + (validate_arglist): Do not allow arguments with TREE_SIDE_EFFECTS. + (simplify_builtin_fputs): Add new argument KNOWN_LEN. If it's set, + use it instead of trying to compute the length of the string. + Update all callers. + * expr.h (simplify_builtin_fputs): Declare. + * tree-flow.h (fold_stmt): Change argument type to tree *. Update + all users. + * tree-ssa-ccp.c: Include expr.h. + (replace_uses_in): If the statement makes a call to some selected + built-ins, mark it for folding. + (get_strlen): New local function. + (ccp_fold_builtin): New local function. + (fold_stmt): Call it. + (set_rhs): Fix if-else-if chaining. Handle cases where the whole + statement needs to be replaced. + * tree.h (c_strlen): Declare. + +2003-07-31 Diego Novillo <dnovillo@redhat.com> + + Fix PR optimization/11373 + * tree-ssa-dce.c (stmt_useful_p): Get statement operands before + checking for volatile operands. + * tree-dfa.c (get_expr_operands): If a constant is dereferenced as a + pointer, mark the statement as having volatile operands. + (may_access_global_mem_p): If a non-NULL constant is used as a + pointer, consider it as pointing to global memory. + * tree-ssa-dom.c (optimize_stmt): Set addr_expr_propagated_p when + propagating pointers that are integer constants. + +2003-07-31 Andrew MacLeod <amacleod@redhat.com> + + * tree-dfa.c (add_stmt_operand): Don't treat complex types as scalars. + * tree-ssa-live.c (var_union): Change comment. + (coalesce_tpa_members): Don't proceed if var_union fails. + * tree-ssa.c (insert_copy_on_edge): Change comment. + (coalesce_abnormal_edges): Handle var_union failing. + (coalesce_vars): Skip constant PHI arguments. + +2003-07-30 Jeff Law <law@redhat.com> + + * tree-cfg.c (bsi_remove): Don't remove a COMPOUND_EXPR with empty + arms if the arms are in different basic blocks. + + * tree-ssa-dom.c (record_cond_is_false): New function. + (record_cond_is_true): Similarly. + (get_eq_expr_value): Use record_cond_expr_is_{true,false}. + (optimize_stmt): Fix minor formatting issue. If we encounter an + INDIRECT_REF, record that the dereferenced pointer can not be + null. + +2003-07-30 Daniel Berlin <dberlin@dberlin.org> + + * tree-dump.c (dump_option_value_in): "all" is now everything but + TDF_RAW and TDF_SLIM. + +2003-07-30 Diego Novillo <dnovillo@redhat.com> + + * tree-simple.c (is_gimple_const): Accept CONST + CONST expressions + as GIMPLE constants. + +2003-07-30 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c: #include real.h + (defs_match_p): Change arguments to something normal now that we use + the new renaming algorithm. Update all callers. + Use defs_hash_expr. + (defs_y_dom_x): Ditto. + (defs_hash_expr): New. Based on iterative_hash_expr. + (generate_exr_as_of_bb): If there aren't any uses, return. + (subst_phis): Call modify_stmt on the actually modified statement. :) + (get_default_def): Only walk SSA_NAME arguments in PHI's. + +2003-07-30 Jason Merrill <jason@redhat.com> + + Don't modify code that is already GIMPLE. + * gimplify.c (gimplify_expr): Don't return early if the predicate + matches. + Use a variable temp if the caller wants an lvalue. + Don't call gimplify_constructor if we're on the rhs of a MODIFY_EXPR. + (add_tree, add_stmt_to_compound): Do add an empty stmt if we + previously had nothing at all. + (gimplify_return_expr): Don't mess with iterators if it was already + gimple. + (gimplify_cond_expr): Remove a COND_EXPR with two empty arms. + (gimplify_call_expr): Try to simplify a builtin again after + gimplifying the args. + (internal_get_tmp_var): Gimplify the new MODIFY_EXPR. + (gimplify_expr, gimple_push_cleanup): Use boolean_false_node. + (gimplify_init_constructor): New fn, broken out from... + (gimplify_modify_expr): ...here. Be smarter about zero-initialization. + * tree-simple.c (is_gimple_rhs): Accept any CONSTRUCTOR. + * tree-simple.h: Adjust add_tree prototype. + +2003-07-29 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c (create_alias_vars): If we created global_var, + delete it when we are done. + (ptr_may_alias_var): Handle case that global_var is now NULL_TREE. + +2003-07-29 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_stmt): Propagate copies into VUSEs and + the RHS of VDEFs. + +2003-07-29 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa.c (insert_copy_on_edge): Only set used bit on DECL nodes. + +2003-07-29 Andrew MacLeod <amacleod@redhat.com> + + * common.opt (ftree-combine-temps): Add new option. + * flags.h (flag_tree_combine_temps): New flag. + * opts.c (decode_options): Initialize flag_tree_combine_temps. + (common_handle_option): Handle new flag. + * toplev.c (flag_tree_combine_temps): Declare. + (lang_independent_options f): Add tree-combine-temp. + * tree-ssa-live.c (var_union): When combining 2 root variables, choose + the user variable over a temporary as the new variable. + (compact_var_map): Use renamed root_var routines. + (calculate_live_on_exit): Reformatting. + (tpa_init): Initialize a tpa object. + (tpa_remove_partition): Remove a partition from a tpa list. + (tpa_delete): Delete a tpa object. + (tpa_compact): Hide single elemenet lists. + (root_var_init): Split common part into tpa_init and rename. + (remove_root_var_partition, delete_root_va, dump_root_var): Delete. + (type_var_init): New. Initialize a type_var object. + (create_coalesce_list): New. Create a coalesce_list object. + (delete_coalesce_list): New. Free a coalesce list's memory. + (find_partition_pair): New. Find a coalesce pair in a coalesce list. + (add_coalesce): New. Add a coalesce between 2 partitions. + (sort_coalesce_list): New. Sort coalesce pairs by importance. + (pop_best_coalesce): New. Get best remaining pair to coalesce. + (add_conflicts_if_valid): Move from tree-ssa.c. + (build_tree_conflict_graph): Move from coalesce_ssa_name in tree-ssa.c. + Genericize to use tpa_p instead of root_var object. Don't add + interferences between copies. Update coalesce list. + (coalesce_tpa_members): Move from coalesce_ssa_name in tree-ssa.c. Use + tpa_p instead of root_var. Use coalesce list if provided. + (dump_coalesce_list): New. Show debug info for a coalesce list. + (tpa_dump): Rename from dump_root_var and genericize to use tpa_p. + * tree-ssa-live.h (root_var_p): Rename structure type to tpa_p + (tpa_num_trees, tpa_tree, tpa_first_partition, tpa_next_partition, + tpa_find_tree): New. Generic versions of existing root_var routines. + (tpa_decompact): New. Include single version lists. + (root_var_p): Declare as type tpa_p. + (root_var_num, root_var, root_var_first_partition, + root_var_next_partition, root_var_dump, root_var_delete, + root_var_remove_partition, root_var_find , root_var_compac, + root_var_decompac): Rename and call generic versions. + (type_var_p): New. Use tpa_p structure for a type based association. + (type_var_num, type_var, type_var_first_partition, + type_var_next_partition, type_var_dump, type_var_delete, + type_var_remove_partition, type_var_find, type_var_compact, + type_var_decompact): New. Call generic versions of the routine. + (struct partition_pair_d): New. Represent a desired coalesce. + (struct coalesce_list_d): New. Organize lists of desired coalesces. + (NO_BEST_COALESCE): Define value. + * tree-ssa.c (set_if_valid): Remove. + (insert_copy_on_edge): Set variable as used when inserting a copy. + (add_conflicts_if_valid): Remove. Move to tree-ssa-live.c. + (print_exprs): New. Routine for commonly used output format. + (coalesce_abnormal_edges): New. Split from coalece_ssa_name. Force + partition coalesces across abnormal edges. + (coalesce_ssa_name): Split out build_tree_conflict_graph, + coalesce_abnormal_edges, and coalesce_tpa_members. Return live + range info if required. Use renamed root_var routines. + (assign_vars): Use renamed root_var routines. + (replace_variable): Mark as inline. + (coalesce_vars): Coalesce variable memory storage. + (rewrite_out_of_ssa): Don't compact varmap anymore. Free live range + info if required. Call coalesce_vars if combining temps. + +2003-07-29 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (handle_switch_fallthru): Use bsi_link_after if stmt is + in a basic block. + +2003-07-28 Diego Novillo <dnovillo@redhat.com> + + * opts.c (decode_options): Disable must-alias optimization. + +2003-07-28 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa.c (struct _elim_graph): Add varray for constant copies. + (new_elim_graph): Initialize constant copy array.. + (eliminate_build): Push constant copies onto stack instead of emitting. + (eliminate_phi): Emit any pending constant copies. + +2003-07-28 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_block): If a PHI has a single argument + that is a constant, then that creates a useful equivalence. + Propagate constant values into PHI nodes. + + * tree-flow-inline.h (may_propagate_copy): Allow RHS to be a + constant. + + * tree-dfa.c (compute_immediate_uses_for): Do not assume that + PHI arguments are SSA_NAMEs. + * tree-ssa-dce.c (process_worklist): Likewise. + * tree-ssa-copyprop.c (copyprop_phi): Likewise. Use may_propagate_copy. + * tree-ssa-ccp.c (visit_phi_node): Do not assume that PHI arguments + are SSA_NAMEs. Create a suitable value if a PHI argument is a + constant. + + * tree-cfg.c (move_outgoing_edges): Correctly handle case where + an edge already exists from BB1 to BB2's successor. + +2003-07-27 Daniel Berlin <dberlin@dberlin.org> + + * tree.h (EREF_TEMP): Rename to EPHI_TEMP. + (tree_eref_common): Move temp to tree_ephi_node. + * tree-ssa-pre.c: Remove #if 0'd code. + Use EPHI_TEMP rather than EREF_TEMP, remove EREF_TEMP on EUSE nodes. + (finalize_1): Handle empty blocks properly. + +2003-07-27 Andreas Jaeger <aj@suse.de> + + * tree.c: Convert remaining K&R prototypes to ISO C90. + * tree-dump.c: Likewise. + * tree-inline.c: Likewise. + * stmt.c (expand_asm_expr): Likewise. + + * diagnostic.h: Remove PARAMS. + +2003-07-26 Paul Brook <paul@nowt.org> + + * Makefile.in: Rename check-g95 to check-gfortran. + * gcc.c (default_compilers): Add entries for .f90 and .f95. + * doc/frontends.texi: Document new F95 front end. + * doc/install.texi: Ditto. + * doc/invoke.texi: Ditto. + * doc/sourcebuild.texi: Ditto. + * fortran: New front end. + +2003-07-25 Jeff law <law@redhat.com> + + * tree-ssa-dom.c (optimize_block): Use may_propagate_copy. + +2003-07-25 Diego Novillo <dnovillo@redhat.com> + + * opts.c (decode_options): Re-enable must-alias optimizations. + +2003-07-25 Daniel Berlin <dberlin@dberlin.org> + + * configure.in: Update BANSHEEREBUILD for PWD change. + * configure: regen + +2003-07-25 Andreas Jaeger <aj@suse.de> + + * c-call-graph.c: Convert to ISO C90. + * c-common.c: Likewise. + * c-mudflap.c: Likewise. + * c-pretty-print.c: Likewise. + * cfganal.c (find_edge): Likewise. + * dependence.c: Likewise. + * diagnostic.c (debug_output_buffer): Likewise. + * except.c (expand_eh_handler): Likewise. + * fold-const.c: Likewise. + * langhooks.c: Likewise. + * tree-cfg.c (last_exec_block): Likewise. + * tree-ssa-pre.c: Likewise. + * builtins.c: Likewise. + + * tree.h: Remove remaining PARAMS. + * c-common.h: Likewise. + * c-pretty-print.h: Likewise + * c-tree.h: Likewise. + * except.h: Likewise. + * langhooks-def.h: Likewise. + * langhooks.h: Likewise. + +2003-07-24 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (cleanup_operand_arrays): New local function. Remove + superfluous VUSE operands. + (get_stmt_operands): Call it. + +2003-07-24 Jason Merrill <jason@redhat.com> + + * gimplify.c (gimple_boolify): New fn. + (gimplify_expr) <TRUTH_NOT_EXPR>: Boolify arg. + (gimplify_cond_expr): Boolify condition. + (gimplify_boolean_expr): Boolify args. + (gimple_push_cleanup): Make flag boolean. + + * tree-simple.c (is_gimple_relop): TRUTH_{AND,OR,XOR}_EXPR + are not comparisons. + (is_gimple_binary_expr): They are binary ops. + + * tree-mudflap.c (mf_build_check_statement_for): Use TRUTH_OR_EXPR + rather than BIT_IOR_EXPR. + +2003-07-23 Jason Merrill <jason@redhat.com> + Diego Novillo <dnovillo@redhat.com> + + * c-common.h (DECL_C_HARD_REGISTER): Replace ... + * tree.h (DECL_HARD_REGISTER): ... with this. Update all users. + +2003-07-23 Diego Novillo <dnovillo@redhat.com> + + * tree-flow-inline.h (may_propagate_copy): New function. + * tree-flow.h (may_propagate_copy): Declare. + * tree-ssa-copyprop.c (copyprop_stmt): Call it. + (get_original): Likewise. + * tree-ssa-dom.c (optimize_stmt): Likewise. + +2003-07-23 Frank Ch. Eigler <fche@redhat.com> + + * gcc.c (MFWRAP_SPEC): Also wrap pthread_join and pthread_exit. + +2003-07-23 Steven Bosscher <steven@gcc.gnu.org> + + * tree-flow-inline.h (remove_dom_child): New function. + (clear_dom_children): New function. + * tree-cfg.c (bsi_insert_on_edge_immediate): Do not clear + the annotation for the new bb, it is already memset to zero + in alloc_aux_for_block(). + (move_outgoing_edges): Use dom_children() instead of looking + at the dom_children field in the basic block annotation. + * tree-ssa.c (rewrite_into_ssa): Use clear_dom_children(). + + * tree-cfg.c (dump_tree_cfg): Dump to `file', not `dump_file'. + +2003-07-23 Diego Novillo <dnovillo@redhat.com> + + * tree.h (DECL_ESTIMATED_INSNS): Move from c-common.h. + +2003-07-23 Steven Bosscher <steven@gcc.gnu.org> + + * tree-ssa-dom.c (tree_ssa_dominator_optimize): Make + found_unreachable a bool. Create/delete hash tables for + copies and available exprs outside the main loop. Use + htab_clean to wipe them after each iteration. + +2003-07-22 Diego Novillo <dnovillo@redhat.com> + + * opts.c (decode_options): Add temporary test for environment + variable TREE_SSA_DO_PRE. + Do not disable dominator optimizations when PRE is enabled. + +2003-07-22 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (finalize_1): Change to not use bsi_last. + +2003-07-22 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg.c (remove_stmt): Revert 07-15 change. Turns out the bug is in + the reverse iterator. + +2003-07-22 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (visit_phi_node): Assume default value of CONSTANT + if the PHI value was already constant. + +2003-07-22 Andrew MacLeod <amacleod@redhat.com> + + * c-pretty-print.c (print_call_name): Handle COND_EXPR correctly. + * tree-pretty-print.c (print_call_name): Handle COND_EXPR correctly and + handle SSA_NAME. + * tree-dfa.c (add_phi_arg, remove_phi_arg_num): Remove references to + SSA_NAME_HAS_REAL_REFS. + * tree-ssa-ccp.c (visit_phi_node): Remove SSA_NAME_HAS_REAL_REFS. + * tree-ssa-copyprop.c (copyprop_phi): Remove SSA_NAME_HAS_REAL_REFS. + * tree-ssa-live.c (register_ssa_partition): Register the PHI and it's + arguments if this variable is defined by a PHI. + (create_ssa_var_map): Only register real uses and defs, and virtual + operands of ASM_EXPR's. Remove SSA_NAME_HAS_REAL_REFS. Don't set + used flag on variables here. + (calculate_live_on_entry): Ignore constants in PHI arguments. + (calculate_live_on_exit): Ignore constants in PHI arguments. + (dump_live_info): New. Dump live range information. + * tree-ssa-live.h (dump_live_info): New prototype and flags. + * tree-ssa-pre.c (create_expr_ref, finalize_1, repair_use_injury, + code_motion): Remove SSA_NAME_HAS_REAL_REFS. + * tree-ssa.c (rewrite_operand, register_new_def): Remove real_ref + parameter and SSA_NAME_HAS_REAL_REFS. + (rewrite_block): Remove real_ref parameter from register_new_def call. + (eliminate_build): Remove SSA_NAME_HAS_REAL_REFS. Insert copy if PHI + argument is a constant. Handle irregular PHI argument ordering. + (elim_create): Remove dead code to count PHI nodes. + (assign_vars): Set used flag on variables when assigned. + (replace_variable): Eliminate dead code. + (coalesce_ssa_name): Remove SSA_NAME_HAS_REAL_REFS. Print error for + constant argument across an abnormal edge. + (eliminate_extraneous_phis): New. Remove PHI nodes which are not in + the partition. + (rewrite_out_of_ssa): Call eliminate_extraneous_phis. + (rewrite_stmt): Remove real_ref parameter from rewrite_operand and + register_new_def. + * tree.h (SSA_NAME_HAS_REAL_REFS): Remove. + (struct tree_ssa_name): Remove 'has_real_refs' field. + +2003-07-22 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (factor_through_injuries): Take new argument specifying + whether use was injured or not (needed for SR). Update all callers. + (maybe_find_rhs_use_for_var): Take new argument specifying which + operand to start search with. Update all callers. + (phi_opnd_from_res): #if 0 out. + (rename_2): Ditto. + (rename_1): Ditto. + (defs_match_p): Take new arguments specifying which defs were injured. + Update all callers. + (defs_y_dom_x): Ditto. + (generate_expr_as_of_bb): Fix small memory overwrite. + (process_delayed_rename): Propagate injured flag around. + (new_rename_1): Ditto. + (finalize_1): Get correct variable names for newly created statement if + necessary due to PHI. + (repair_use_injury): Note the repair in the stats. Insert repair + in right place. + (repair_euse_injury): Fix handling of PHI_NODE. + (code_motion): Fix algorithm so it can handle using reaching_def all the + time (needed for SR). + Use reaching_def rather than EREF_TEMP. + +2003-07-21 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (get_stmt_operands): Remove FIXME note + regarding virtual operands for ASM_EXPRs. + +2003-07-21 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_def): Renamed from set_def. Update all users. + (get_stmt_operands): Don't force ASM_EXPR operands to be virtual. + (add_stmt_operand): Allow non-assignments to create new defs. + * tree-dump.c (dump_function): Move header dump... + (dump_function_to_file): ... here. + * tree-flow-inline.h (def_ops): Renamed from def_op. Return a + varray with all the definitions made by the statement. + Update all users. + * tree-flow.h (struct operands_d): Rename field 'def_op' to + 'def_ops'. Convert it into a varray. + * tree-must-alias.c (tree_compute_must_alias): Call + dump_function_to_file instead of dump_function. + * tree-ssa-ccp.c (tree_ssa_ccp): Likewise. + (visit_stmt): Only visit statements that make new definitions using + MODIFY_EXPR. + Definitions coming from other statements are considered VARYING. + * tree-ssa-copyprop.c (tree_ssa_copyprop): Call + dump_function_to_file instead of dump_function. + * tree-ssa-dce.c (tree_ssa_dce): Likewise. + * tree-ssa-dom.c (tree_ssa_dominator_optimize): Likewise. + (optimize_stmt): Don't abort if a statement makes more than one + definition. + Check for MODIFY_EXPR statements directly, instead of relying on + the presence of a single definition. + * tree-ssa-pre.c (tree_perform_ssapre): Call dump_function_to_file + instead of dump_function. + * tree-ssa.c (rewrite_into_ssa): Likewise. + Dump the function before dominator optimizations if TDF_DETAILS is + set. + (rewrite_stmt): Don't abort if the statement makes more than one + definition. + +2003-07-21 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (tree_ssa_dominator_optimize): If we made any + blocks unreachable, repeat the dominator optimizations. + (optimize_block): Enter PHIs with a single source argument into + the const_and_copies table. When propagating into a PHI node, + break the loop over the PHI arguments when a propagation is performed. + If the PHI agument is not an SSA_VAR, then no propagation is possible. + (optimize_stmt): If an operand is not an SSA_VAR, then no propagation + is possible/needed. + +2003-07-21 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa-dom.o): Add dependency on $(TREE_DUMP_H). + * fold-const.c (fold): Remove unusued local variable 'invert'. + * tree-dump.c (dump_files): Add entry for -fdump-tree-dom. + * tree-flow.h (tree_ssa_dominator_optimize): Change declaration to + accept a function decl. + * tree-ssa-dom.c: Include timevar.h and tree-dump.h. + (tree_ssa_dominator_optimize): Change to receive the function decl + for the function to optimize. Update callers. + Use own dump file instead of dumping on the .ssa dump file. + Dump function at the end. + Push and pop TV_TREE_SSA_DOMINATOR_OPTS. + * tree-ssa.c (rewrite_into_ssa): Restore check for number of times + that the rename loop has been executed. Abort if the loop executes + more than twice. + * tree.h (enum tree_dump_index): Add TDI_dom. + * doc/invoke.texi: Document -fdump-tree-dom. + +2003-07-21 Steven Bosscher <steven@gcc.gnu.org> + Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (install-po): Check if $CATALOGS is empty to avoid + buggy shells. + * basic-block.h (rtl_verify_flow_info): Remove. + (tree_verify_flow_info): Remove. + (verify_flow_info): Declare. + * builtins.c: Rearrange to simplify merges. Add #if 0 around + expand_ functions that are not used in the branch and move new code + to the end of the file. + * c-opts.c (c_common_handle_option): Move handling of -fdump- to + opts.c. + * cfgloopmanip.c (loop_split_edge_with_NULL): Remove. Update all + users. + * common.opt: Add all the tree-ssa switches. + * opts.c: Handle them. + * flags.h (flag_tree_cp): Remove unused variable. + (enum pta_type): Move from tree-must-alias.h + (flag_tree_points_to): Likewise. + * toplev.c (flag_tree_cp): Remove unused variable. + * tree-cfg.c: Move cfg_hooks structures and functions for + trees from cfghooks.c. + * tree-mudflap.c (mudflap_enqueue_decl): Don't use %D to + avoid warning about format specifiers. + +2003-07-21 Diego Novillo <dnovillo@redhat.com> + + * gimplify.c (gimplify_function_tree): Move gimplification of the + function body ... + (gimplify_body): ... here. + * tree-simple.h (gimplify_body): Declare. + * tree-inline.c (initialize_inlined_parameters): If the + emitted assignment is not in GIMPLE form, gimplify the + body of assignments emitted. + +2003-07-17 Jeff Law <law@redhat.com> + + * tree-dfa.c (remove_phi_arg): Update PHI_ARG_CAPACITY. + + * tree-ssa.c (mark_def_sites): Do not build the dominator tree here. + (rewrite_into_ssa): Do not depend on mark_def_sites to build the + dominator tree. Move computation of dominance frontiers out + of main loop (even though it was only done once). Free immediate + dominator information as soon as we're done with it. + + * tree-flow.h (remove_phi_nodes_and_edges_for_unreachable_block): + Prototype. + * tree-cfg.c (remove_phi_nodes_and_edges_for_unreachable_block): New + function extracted from remove_bb. + (remove_bb): Call remove_phi_nodes_and_edges_for_unreachable_block. + + * tree-ssa-dom.c (optimize_block): Propagate values into PHI nodes. + Do not optimize a block which has become unreachable. + If a COND_EXPR has a compile-time constant condition, then remove + outgoing from the COND_EXPR which can not execute. + +2003-07-16 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mx_xfn_indirect_ref): Correct source locations + for tracked expressions by ignoring incidental decl source loci. + +2003-07-16 Jeff Law <law@redhat.com> + + * tree-cfg.c (remove_bb): Remove statements in reverse order. + Simplify code to issue warnings for unreachable code. + + * tree-ssa-dom.c (get_eq_expr_value): Also enter expressions + into the available expression hash table. Callers changed to + pass in the block_avail_exprs varray and const_and_copies hash + table. + (optimize_stmt): Allow optimization of the condition in + a COND_EXPR statement. + (lookup_avail_expr): For COND_EXPRs, just see if their condition + has been recorded into the hash table, do not enter them into + the hash table. Only do a lookup of the result in the + const_and_copies table if it is an SSA_VAR. + (avail_expr_hash): Handle COND_EXPRs, specifically we only care + about their condition and virtual operands. + (avail_expr_eq): Likewise. If one statement has virtual operands + and the other does not, then the expressions are not equal. + + * tree-ssa.c (rewrite_into_ssa): If we have done dominator + optimizations, then call cleanup_tree_cfg after rewriting is + complete. + * tree-ssa-dom.c (optimize_block): Get eq_expr_value for the + current block rather than having it passed in by the caller. + Propagate eq_expr_value into the false arm of a COND_EXPR. + (get_eq_expr_value): Return equivalences for the false + arm of a COND_EXPR if requested. + +2003-07-16 Daniel Berlin <dberlin@dberlin.org> + + * c-decl.c (store_parm_decls): Also strip NON_LVALUE_EXPRs and + CONVERT_EXPRs when setting DECL_NONLOCAL. + +2003-07-15 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg.c (remove_stmt): Update bb->end_tree_p properly when + stmt_p is the end of the bb. + +2003-07-15 Jeff Law <law@redhat.com> + + * tree-ssa-dom.c (optimize_stmt): Consider two types equivalent if + their TYPE_MAIN_VARIANT is equivalent. + (avail_expr_eq): Likewise. + + * Makefile.in (OBJS): Add tree-ssa-dom.o + (tree-ssa-dom.o): Add dependencies. + (ssa.o, cfghooks.o): Use $(TREE_FLOW_H), not tree-flow.h. + * timevar.def: Add new timevar for dominator optimizer. Reorder + slightly. + * tree-dfa.c (add_stmt_operand): Do not consider references to + static storage as volatile operands. + (add_referenced_var): Static storage items reference global memory. + * tree-ssa.c: Simplify by moving everything specific to the + dominator optimizer into tree-ssa-dom.c. Call into the dominator + optimizer after rewriting all the basic blocks. + * tree-ssa-dom.c: New file. Mostly extracted from tree-ssa.c + * tree-flow.h (tree_ssa_dominator_optimize): Prototype. + (dump_dominator_optimization_stats): Likewise. + (debug_dominator_optimization_stats): Likewise. + +2003-07-15 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_stmt_operand): Move volatile handling... + (find_vars_r): ... here. + Mark when the walker is inside an ASM_EXPR. + (struct walk_state): Add field 'is_asm_expr'. + Change flag fields to bitfields. + (add_referenced_var): If the variable is a pointer being stored by + an ASM_EXPR, mark it as a global memory pointer. + * tree-flow-inline.h (is_optimizable_addr_expr): New function. + * tree-flow.h (is_optimizable_addr_expr): Declare it. + * tree-ssa.c (rewrite_and_optimize_stmt): Use it. + (lookup_avail_expr): Likewise. + (get_eq_expr_value): Likewise. + (avail_expr_eq): Return 'true' when comparing a statement against + itself. + * tree-ssa-dce.c (need_to_preserve_store): Move volatile checking... + (stmt_useful_p): ...here. + +2003-07-15 Andreas Jaeger <aj@suse.de> + + * c-simplify.c: Convert prototypes to ISO C90. + * gimplify.c: Likewise. + * simple-break-elim.c: Likewise. + * simple-goto-elim.c: Likewise. + + * tree-alias-ander.c: Convert prototypes to ISO C90. + * tree-alias-common.c: Likewise. + * tree-alias-type.c: Likewise. + * tree-browser.c: Likewise. + * tree-dchain.c: Likewise. + * tree-mudflap.c: Likewise. + * tree-nomudflap.c: Likewise. + * tree-optimize.c: Likewise. + * tree-pretty-print.c: Likewise. + * tree-simple.c: Likewise. + + * tree-alias-common.h: Convert prototypes to ISO C90, remove extra + whitespace. + * tree-alias-type.h: Convert prototypes to ISO C90. + * tree-dchain.h: Likewise. + * tree-flow-inline.h: Likewise. + * tree-flow.h: Likewise. + * tree-iterator.h: Likewise. + * tree-mudflap.h: Likewise. + * tree-simple.h: Likewise. + +2003-07-14 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (tree_perform_ssapre): Fix dom_children after DCE + breaks them. + +2003-07-14 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_vdef): Initialize variable 'vdef'. + (add_vuse): Initialize variable 'vuse'. + +2003-07-14 Diego Novillo <dnovillo@redhat.com> + + Must alias analysis. Allow the SSA rename pass to be done on a set + of variables. + + * Makefile.in (OBJS): Add tree-must-alias.o. + * flags.h (flag_tree_must_alias): Declare. + * timevar.def (TV_TREE_MUST_ALIAS): Define. + * toplev.c (flag_tree_must_alias): Declare. + (f_options): Add entry for -ftree-must-alias. + (parse_options_and_default_flags): Enable must-alias analysis at -O1. + + * tree-cfg.c (remove_useless_stmts_and_vars): Do not remove + addressable variables. + + * tree-dfa.c (dump_file, dump_flags): New local variables to + replace tree_ssa_dump_file and tree_ssa_dump_flags. Update every + user. + (get_stmt_operands): Clear the array of virtual operands before + scanning the statement. + (get_expr_operands): Do not add an operand for ADDR_EXPR if the + expression takes the address of a VAR_DECL or a PARM_DECL. Instead + add the variable to the list of variables whose address has been + taken by the statement. + Allow INDIRECT_REF expressions of the form *&VAR. Convert them + into an operand for VAR. + When processing function calls, add a VUSE for .GLOBAL_VAR if the + function is pure but not const. + (add_stmt_operand): If the operand is an ADDR_EXPR, add the + variable to the list of variables whose address has been taken by + the statement. + (add_vdef): If the statement had virtual definitions, try to find + an existing VDEF for the variable, to preserve SSA information. If + none is found, create a new one. + (add_vuse): Likewise. + (remove_all_phi_nodes_for): New function. + (get_call_flags): New function to replace call_may_clobber. Update + all callers. + + * tree-dump.c (dump_files): Add entry for -fdump-tree-mustalias. + * tree-flow-inline.h (addresses_taken): New function. + (is_unchanging_value): New function. + + * tree-flow.h (addresses_taken): Declare. + (remove_all_phi_nodes): Declare. + (init_tree_ssa): Declare. + (propagate_copy): Declare. + (is_unchanging_value): Declare. + (tree_compute_must_alias): Declare. + + * tree-inline.c (copy_body_r): Fold instances of *&VAR. + + * tree-must-alias.c: New file. + + * tree-optimize.c (optimize_function_tree): Call init_tree_ssa and + compute_may_aliases before calling rewrite_into_ssa. + After the SSA pass, run dead code elimination and compute + must-aliases. + + * tree-simple.c (is_gimple_call_expr): Add comment that + is_gimple_* predicates should not have side effects. + + * tree-ssa-ccp.c: Replace calls to really_constant_p with + is_unchanging_value everywhere. + (fold_stmt): Don't fold if the RHS is already a constant. + + * tree-ssa-copyprop.c (copyprop_stmt): Remove unnecessary + variable 'vuse'. + Call propagate_copy to replace the operand with its new value. + (copyprop_phi): Remove unnecessary variable 'vuse'. + (get_original): Remove unused parameter 'vuse_p'. + (propagate_copy): New function. + + * tree-ssa-dce.c (need_to_preserve_store): Update comments. + + * tree-ssa.c (dump_file, dump_flags): New local variables to + replace globals tree_ssa_dump_file and tree_ssa_dump_flags. Update + all users. + (addr_expr_propagated_p): New local variable. + (vars_to_rename): New local variable. + (check_for_new_variables): New local function. + (rewrite_into_ssa): Add new argument VARS which is a bitmap + representing all the variables that should be renamed into SSA. If + VARS is NULL, all the variables in the program are renamed. + Don't call init_tree_ssa nor compute_may_aliases. + Initialize all the local hash tables and bitmaps. + Add support for repeating the SSA rename process more than once. + If the dominator optimizations produced new symbols, repeat the + process. + (mark_def_sites): Ignore operands that are in SSA form already. + (insert_phi_nodes): Only add PHI nodes for variables in the + VARS_TO_RENAME bitmap. + (rewrite_block): Ignore PHI nodes that have been renamed already. + (rewrite_and_optimize_stmt): Ignore operands that are already in + SSA form. + When propagating ADDR_EXPR set addr_expr_propagated_p to 'true'. + Call propagate_copy when doing copy propagation. + Call is_unchanging_value to decide if the RHS of an assignment is a + constant. + (rewrite_stmt): Ignore operands that are already in SSA form. + (init_tree_ssa): Make external. + Move initialization of local hash tables and bitmaps to + rewrite_into_ssa. + (remove_annotations_r): Don't special case MODIFY_EXPR nodes. + (lookup_avail_expr): Call is_unchanging_value. + (get_eq_expr_value): Likewise. + + * tree.h (enum tree_dump_index): Add TDI_must_alias. + + * cp/optimize.c (optimize_function): Don't call the tree optimizers + if -fdisable-tree-ssa is given. + + * doc/invoke.texi: Add documentation for -ftree-must-alias. + +2003-07-07 Jeff Law <law@redhat.com> + + * fold-const.c (nondestructive_fold_unary_to_constant: For BIT_NOT_EXPR + make sure OP0 is a suitable constant before trying to fold it. + + * tree-cfg.c (handle_switch_fallthru): Set DECL_CONTEXT for + newly created labels. + + * tree-cfg.c (move_outgoing_edges): New function. + (merge_tree_blocks): Use it. + (remove_bb): Remove the block from the pdom_info structures + as well if they exist. + (linearize_cond_expr): Move important edges from the then and + else arms to BB as appropriately + + * tree-cfg.c (remove_stmt): When removing a COMPOUND_EXPR, make + sure that any basic block pointers to the arms of the COMPOUND_EXPR + are updated. + + * tree-cfg.c (make_goto_expr_edges): Computed gotos create + abnormal edges. + +2003-07-05 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (defs_match_p): Check for copies of the same version. + +2003-07-03 Frank Ch. Eigler <fche@redhat.com> + + * tree-nomudflap.c (mf_marked_p, mf_mark): New dummy functions. + +2003-07-03 Jeff Law <law@redhat.com> + + * tree-ssa.c (lookup_avail_expr): Accept new argument containing the + const_and_copies table. All callers changed. If we find the + given expression in the availe expression hash table, then lookup + the LHS of the hash table's entry in the const_and_copies_table. + Do record type casts into the available expression table. + + * tree-nomudflap.c (mf_marked_p): Mark arguments as being unused. + (mf_mark): Likewise. + + * c-decl.c (store_parm_decls): Strip away NOP_EXPRs when looking + for hidden use variables. + +2003-07-02 Frank Ch. Eigler <fche@redhat.com> + + * varasm.c (build_constant_desc): Propagate mudflap marked-ness + across constant copying. + +2003-07-02 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (tree_perform_ssapre): Don't optimize things with + volatile ops or making aliased loads right now. + (create_expr_ref): Mark the phi result of the new phi as having + real refs. + (finalize_1): Mark the new temp as having real refs. + (repair_use_injury): Ditto. + (code_motion): Ditto. + +2003-07-01 Daniel Berlin <dberlin@dberlin.org> + + * tree.h (struct tree_eref_common): Add injured flag. + Add EREF_INJURED macro. + +2003-07-01 Daniel Berlin <dberlin@dberlin.org> + + * tree-flow-inline.h (stmt_ann): We have stmt_ann on E*_NODE's as well, + so use is_essa_node as well. + * tree-dfa.c (create_stmt_ann): Ditto. + * tree.h (is_essa_node): Declare. + * tree.c (is_essa_node): Define. + +2003-07-01 Jason Merrill <jason@redhat.com> + + * tree-cfg.c (prepend_stmt_to_bb): New fn. + (bsi_insert_after): Add to the beginning of an empty block. + +2003-07-01 Jeff Law <law@redhat.com> + + * expr.c (expand_expr, case COND_EXPR): Correctly (?) handle + cases where a containing block has a stack level. Handle + cases where one arm is a GOTO_EXPR and the other arm has + side effects. + + * stmt.c (containing_blocks_have_cleanups_or_stack_level): New + function. + (any_pending_cleanups): Further simplification. + * tree.h (containing_blocks_have_cleanups_or_stack_level): Prototype. + +2003-06-30 Diego Novillo <dnovillo@redhat.com> + + * tree-flow.h (struct tree_ann_common_d): Remove 'stmt' field. + Update all users. + (struct var_ann_d): Remove field 'has_real_refs'. Update all callers + with calls to SSA_NAME_HAS_REAL_REFS. + Remove field 'occurs_in_abnormal_phi'. Update all callers with + calls to SSA_NAME_OCCURS_IN_ABNORMAL_PHI. + * tree-flow-inline.h (var_ann): Only accept _DECL nodes. + (stmt_ann): Only accept GIMPLE statements. + (tree_stmt): Remove. Update all users. + + * tree-cfg.c (linearize_cond_expr): Handle cases where BB doesn't + have a postdominator. + (find_contained_blocks): Do not look inside COND_EXPR_COND nor + SWITCH_COND expressions. + + * tree-dfa.c (get_stmt_operands): Force virtual operands on + ASM_EXPRs. + (get_expr_operands): Handle SSA names when adding operands for + memory tags. + (add_stmt_operand): Handle SSA names. + Move checks for volatile operands earlier in the code. + (add_vdef): Re-format for readability. + (create_var_ann): Only allow _DECL nodes. + (create_stmt_ann): Only allow GIMPLE statements. + (dump_variable): Handle SSA names. + (dump_may_aliases_for): Likewise. + (may_access_global_mem_p): Handle SSA names. + (remove_phi_arg): If the argument removed was the last one with + real references, update the LHS of the PHI node. + (add_phi_arg): If the argument added has real references, propagate + the attribute into the LHS of the PHI node. + + * tree-pretty-print.c (dump_generic_node): Only retrieve basic + block information from GIMPLE statements. + Always output the THEN and ELSE clauses of COND_EXPR nodes. + + * tree-simple.c (is_gimple_stmt): Accept PHI_NODEs. + (is_gimple_id): Accept SSA_NAMEs. + + * tree-ssa-copyprop.c (copyprop_phi): If an argument is used as a + real operand, propagate the attribute into the LHS of the PHI. + + * tree-ssa-live.c (create_ssa_var_map): Don't set 'used' flag on + both the operand and the result of VDEFs. + Only register PHI results and arguments that have been used as real + operands. + (calculate_live_on_entry): Fix formatting in debugging message. + + * tree-ssa.c (register_new_def): Add new argument + 'is_real_operand'. If it's set, set SSA_NAME_HAS_REAL_REFS for the + new name. Update all callers. + (rewrite_operand): Add new argument 'is_real_operand'. If it's + set, set SSA_NAME_HAS_REAL_REFS to the operand. + (eliminate_build): Ignore PHI arguments and PHI results that have + not been used in real operands. + (rewrite_vdefs): Remove. Update all users. + (set_is_used): Don't handle SSA names. + (coalesce_ssa_name): Ignore PHI arguments that have not had real + references in the program. + + * tree.c (make_ssa_name): Update documentation. + * tree.h (IS_EMPTY_STMT): Call integer_zerop instead of comparing + against size_zero_node. + (SSA_NAME_HAS_REAL_REFS): Define. + (SSA_NAME_OCCURS_IN_ABNORMAL_PHI): Define. + (struct tree_ssa_name): Add bitfields 'has_real_refs' and + 'occurs_in_abnormal_phi'. + +2003-06-30 Jeff Law <law@redhat.com> + + * c-simplify.c (gimplify_c_loop): Don't return a LOOP_EXPR for + a do ... while (0) loop. + + * expr.c (expand_expr, case COND_EXPR): Be smarter about expanding + a COND_EXPR with only one useful arm, which happens to be a GOTO_EXPR. + + * tree-cfg.c (remove_useless_stmts_and_vars): Don't remove user + variables unless we're at -O2 or higher. + +2003-06-30 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (expr_phi_insertion): Stop optimizing the expression + if we have > some very large number of ephi operands, as it will + take an ungodly amount of memory and time. + (pre_expression): Push/pop gc context so we can do gc collection + in between expressions. + Throw away expression info right after done optimizing it. + +2003-06-30 Jason Merrill <jason@redhat.com> + + * gimplify.c (gimplify_call_expr): Check PUSH_ARGS_REVERSED. + + * gimplify.c (gimplify_modify_expr): Also force a call with a + possible nonlocal goto into a temporary. + (gimplify_return_expr): Don't duplicate the MODIFY_EXPR. + * tree-iterator.h (tsi_one_before_end_p): New fn. + +2003-06-29 Jeff Sturm <jsturm@one-point.com> + + * fold-const.c (fold): Don't save_expr unless TREE_SIDE_EFFECTS. + +2003-06-26 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (gimplify_stmt_expr): Handle statement-expressions + that don't end in a non-void expression. Emit a warning in that + case. + +2003-06-26 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (fixup_domchildren): Rename from + compute_domchildren, change to not use our own array. + (domchildren): Remove variable. + (insert_occ_in_preorder_dt_order_1): Use dom_children now. + (insert_euse_in_preorder_dt_order_1): Ditto. + (search_dt_preorder): Ditto. + (handle_bb_creation): Fix to work properly. + (tree_perform_ssapre): Remove remnants of domchildren. + Redo dominator info if we have to due to a new block. + +2003-06-26 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (handle_switch_split): Use a tree iterator to find the + real split point rather than a block iterator. + +2003-06-26 Jason Merrill <jason@redhat.com> + + * tree-simple.c (is_gimple_stmt): Complete. + +2003-06-24 Jeff Law <law@redhat.com> + + * tree-cfg.c (remove_useless_stmts_and_vars): On the first + iteration, remove unused variables from BIND_EXPRs. + * tree-flow.h (var_ann_d): Add new field USED. + (set_is_used): Prototype. + (remove_useless_stmts_and_vars): Update prototype. + * tree-ssa-live.c (create_ssa_var_map): Note which variables + are used so that we can delete those which are not used. + * tree-ssa.c (create_temp): Mark the new temporary as being used. + (rewrite_out_of_ssa): Note if the call to remove_useless_stmts_and_vars + is the first iteration or not. + (set_is_used): New function. + + * c-decl.c (store_parm_decls): Variables and parameters on the + pending_sizes chain have nonlocal uses. + +2003-06-25 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c: Convert to ISO C. + (handle_bb_creation): New function. + (ephi_will_be_avail): Remove dead code. + (finalize_1): Use handle_bb_creation, start to fix edge insertion + related fun. + (maybe_find_rhs_use_for_var): Stop using tree_stmt. + (code_motion): Always get the temporary from the right place. + +2003-06-24 Jason Merrill <jason@redhat.com> + + * gimplify.c (gimplify_self_mod_expr): Add want_value parm. + For postfix ops, make sure it returns an rvalue. + (gimplify_expr): Copy a volatile reference into a temp. + (create_tmp_var): Require a complete type. + (create_tmp_alias_var): Use TYPE_VOLATILE on types. + * tree-simple.c (is_gimple_stmt): Flesh out a bit. + (is_gimple_val): Don't allow volatiles. + + * c-simplify.c (gimplify_expr_stmt): Don't insert a null pointer. + + * gimplify.c (gimplify_return_expr): Search through the gimple + form for the interesting MODIFY_EXPR. + (gimplify_modify_expr): Don't suppress posteffects if want_value. + +2003-06-24 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (struct dfa_stats_d): Remove obsolete fields + num_tree_refs and size_tree_refs. Update all users. + (dump_dfa_stats): Also dump information about VUSE and VDEF + operands. + * tree-ssa.c (rewrite_vdefs): Dump information about VDEF operators + promoted to real copies if -fdump-tree-optimized-details is given. + +2003-06-23 Jeff Law <law@redhat.com> + + * tree-ssa.c (avail_expr_eq): Verify types are the same before + handing expressions to operand_equal_p. + + * tree-cfg.c (make_edges): Remove fake edges before building + extra edges for TRY_FINALLY_EXPRs. Delete unnecessary edges + leaving the TRY block in a TRY_FINALLY_EXPR. + (find_contained_blocks): Don't consider statements in the CATCH + clause of a TRY_CATCH_EXPR when noting the last statement in + the block. + * tree-dfa.c (remove_phi_arg): If we removed the last PHI argument, + then remove the entire PHI node. + * tree-ssa-dce.c (stmt_useful_p): Consider the other EH related + nodes useful as well (TRY_FINALLY_EXPR, TRY_CATCH_EXPR, and + EH_FILTER_EXPR). + + * tree-cfg.c (remove_useless_stmts_and_vars): If the body of a + TRY_CATCH_EXPR is empty, then the entire TRY_CATCH_EXPR can + be safely removed. + + * tree-cfg.c (find_contained_blocks): Renamed from + find_contained_blocks_and_edge_targets. Remove targets + bitmap argument and no longer record targets of edges. + All callers changed. + (make_edges): No longer need TRY_TARGETS bitmap. Kill it. + Simplify code which creates additional edges out of the TRY + block and the FINALLY block in a TRY_FINALLY_EXPR. + +2003-06-23 Diego Novillo <dnovillo@redhat.com> + + * tree-alias-common.c (ptr_may_alias_var): Don't handle memory + tags. + * tree-dfa.c (struct alias_set_d): Remove. Update all users. + (alias_sets): Remove. Update all users. + (struct walk_state): Remove field aliased_objects_found. + (struct alias_map_d): New. + (addressable_vars): New local variable. + (pointers): New local variable. + (add_stmt_operand): Do not force aliased variables to be in virtual + operands. + (register_alias_set): Remove. Update all users. + (find_alias_for): Remove. Update all users. + (get_memory_tag_for): New local function. + (num_referenced_vars): Remove. + (num_aliased_objects): Remove. Update all users. + (aliased_objects): Remove. Update all users. + (aliased_objects_alias_set): Remove. Update all users. + (num_call_clobbered_vars): Remove. Update all users. + (dump_variable): Move code to dump aliases ... + (dump_may_aliases_for): ... here. + (debug_may_aliases_for): New function. + (compute_may_aliases): Initialize 'addressable_vars' and 'pointers' + arrays. + (compute_alias_sets): Re-implement matching pointers with + addressable variables. Limit the size of may-alias sets. + (may_alias_p): Re-implement to compare pointers against variables, + instead of memory tags. + (dump_alias_info): Re-implement to display pointers and addresable + variables arrays. + (add_referenced_var): Collect addressable variables and pointers. + Share memory tags among pointers that may alias each other. + * tree-flow.h (num_referenced_vars): Change to macro. + (referenced_var): Likewise. + (num_call_clobbered_vars): Likewise. + (call_clobbered_var): Likewise. + (dump_may_aliases_for): Declare. + (debug_may_aliases_for): Declare. + * tree-ssa.c (rewrite_vdefs): New local function. + (rewrite_out_of_ssa): Call it. + +2003-06-23 Jeff Law <law@redhat.com> + + * tree-cfg.c (make_edges): Walk TRY_FINALLYs inner to outer and + simplify creation of special edges related to the TRY_FINALLY_EXPR. + + * tree-cfg.c (remove_useless_stmts_and_vars): More aggressively + remove TRY_CATCH_EXPRs and TRY_FINALLY_EXPRs. + + * tree-cfg.c (make_edges): Remove fake edges. + (make_exit_edges): Mark edges from nonreturning functions to the + exit block as being fake edges. + + * gimplify.c (gimplify_modify_expr): Don't create a new MODIFY_EXPR, + reuse the existing one. + +2003-06-23 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (find_insert_location): Default case should insert after + the last stmt in the block. + +2003-06-22 Jeff Sturm <jsturm@one-point.com> + + * Makefile.in (old-tree-inline.o): Remove rule. + * old-tree-inline.c: Remove. + +2003-06-19 Jeff Law <law@redhat.com> + + * tree-cfg.c (make_ctrl_stmt_edges): Do not create bogus edges + to the successor block of TRY_CATCH_EXPR, TRY_FINALLY_EXPR, + CATCH_EXPR or EH_FILTER_EXPR nodes. + + * gimplify.c (gimplify_modify_expr): If the RHS of an MODIFY_EXPR + might throw, then make sure its result goes into a temporary. + + * tree-cfg.c (handle_switch_split): Handle case where target + block has only one statement (the case label itself). + +2003-06-19 Diego Novillo <dnovillo@redhat.com> + + * doc/invoke.texi: Add documentation for -ftree-dominator-opts + that was missing from an earlier patch. + +2003-06-19 Jeff Sturm <jsturm@one-point.com> + + * gimplify.c (gimplify_expr): Handle LABELED_BLOCK_EXPR + and EXIT_BLOCK_EXPR. + (gimplify_labeled_block_expr): New function. + (gimplify_exit_block_expr): New function. + +2003-06-18 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (EDGE_INSERT_LOCATION_BSI_AFTER): New location code. + (cleanup_switch_expr_graph): Find default case correctly. + (bsi_insert_after): Get BB from stmt when its avialble. + (bsi_insert_before): Get BB from stmt when its avialble. + (handle_switch_fallthru): New. Handle edge from switch to the fallthru. + (handle_switch_split): Re-implement using new scheme. + (find_insert_location): Use handle_switch_fallthru (). + (bsi_insert_on_edge_immediate): Handle EDGE_INSERT_LOCATION_BSI_AFTER. + * tree-iterator.h (tsi_last): New. Find last stmt in a chain. + +2003-06-17 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c (find_func_aliases): Guard cast op + properly. + (ptr_may_alias_var): Small optimization to avoid calling + decl_function_context so often. + * tree-alias-ander.c (ander_simple_assign): Ignore if lhs == rhs. + +2003-06-17 Steven Bosscher <steven@gcc.gnu.org> + + * timevar.def (TV_TREE_BUILD_FUD_CHAINS): Remove. + +2003-06-16 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (DONT_SIMULATE_AGAIN): Define. + (visit_phi_node): Don't do anything if the PHI node doesn't need to + be simulated. + If the PHI variable does not have real references, consider it + VARYING. + If the PHI node has a lattice value of VARYING, set + DONT_SIMULATE_AGAIN. + (visit_stmt): Don't do anything if the statement doesn't need to be + simulated. + Only visit conditional branches COND_EXPR and SWITCH_EXPR. + If the statement doesn't produce a result mark it with + DONT_SIMULATE_AGAIN. + (visit_assignment): Remove unnecessary def_op() check. + If the value is VARYING, mark the statement with + DONT_SIMULATE_AGAIN. + (visit_cond_stmt): Remove unnecessary is_ctrl_stmt() check. + If the predicate is VARYING, mark the statement with + DONT_SIMULATE_AGAIN. + (initialize): Clear DONT_SIMULATE_AGAIN flag for every statement + and PHI node. + (likely_value): Get statement operands after checking if it makes + aliased loads or has volatile operands. + +2003-06-16 Jeff Law <law@redhat.com> + Jason Merrill <jason@redhat.com> + + * except.c (enum eh_region_type): Don't declare the enumeration + members here. Instead do it in except.h. + (expand_eh_hander): Use expr_first instead of open-coding it. + * except.h (enum eh_region_type): Define the enumeration memebers + here. + * tree-cfg.c (last_exec_block): Break out from make_edges. + (could_trap_p): No longer static. + (get_eh_region_type): New function. + (make_try_expr_blocks): Keep the whole TRY_CATCH_EXPR or + TRY_FINALLY_EXPR instead of just the handler part in the + EH_STACK varray. For a cleanup, record which cleanup higher + in the EH_STACK it can reach. + (make_edges): Use last_exec_block. + (make_ctrl_stmt_edges): Thread cleanups as needed. + (compute_reachable_eh): Use get_eh_region_type. Properly + track when we can skip cleanups. Skip cleanups when possible. + * tree-flow.h (could_trap_p): Prototype. + +2003-06-16 Andrew Macleod <amacleod@redhat.com> + + * tree-cfg.c (find_insert_location): Check for control_altering stmts, + and abort if its an unrecognized BB ending stmt. + (bsi_commit_first_edge_insert): Rename to bsi_insert_on_edge_immediate, + externalize, and change the interface to an on-demand inserter. + (bsi_commit_edge_inserts): Call bsi_insert_on_edge_immediate(). + * tree-flow.h (bsi_insert_on_edge_immediate): Prototype. + * tree-pretty-print.c (dump_block_info): Add 'ab' for abnormal edges. + * tree-ssa-dce.c (process_worklist): Use sparse bitmaps. + * tree-ssa-live.c (calculate_live_on_entry): Abort if ssa_name has a + definition, but is also live on entry. + * tree-ssa.c (coalesce_ssa_name): Call abort() instead of error(), and + provide more detailed info. + (rewrite_out_of_ssa): Provide CFG dumps before and after rewritting. + +2003-06-16 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_mark): Use GC-compatible htab_create_ggc. + +2003-06-15 Jeff Law <law@redhat.com> + + * tree-ssa-ccp.c (visit_phi_node): If the PHI is already known + to be varying, don't recompute its value. + +2003-06-14 Jeff Law <law@redhat.com> + Jason Merrill <jason@redhat.com> + + * tree-cfg.c (make_blocks): Do not return early if presented + with an empty statement. + (make_ctrl_stmt_edges): Do not try to optimize an empty TRY + block in a TRY_FINALLY_EXPR. Simplify TRY_FINALLY_EXPR, + TRY_CATCH_EXPR, CATCH_EXPR, and EH_FILTER_EXPR now that empty + statements are no longer shared. + +2003-06-14 Kazu Hirata <kazu@cs.umass.edu> + + * tree-ssa-pre.c: Fix a comment typo. + +2003-06-13 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (get_stmt_operands): Abort if the statement is a + variable. + (create_var_ann): Abort if the variable is not a _DECL node. + +2003-06-13 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mudflap_c_function): Change calling conventions so + as to return the instrumented function body rather than changing the + given fndecl in place. Gimplify at the very end, for cosmetic + reasons. + * tree-mudflap.h, tree-nomudflap.c: Corresponding changes. + * c-decl.c (c_expand_body_1): Call mudflap_c_function just before + rtl expansion of function body; don't interfere with inlining. + +2003-06-13 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c: Fix typo in previous change. + +2003-06-13 Diego Novillo <dnovillo@redhat.com> + + * c-common.c, c-common.h, c-decl.c, c-lang.c, c-simplify.c, + flags.h, gimplify.c, langhooks-def.h, langhooks.c, langhooks.h, + simple-break-elim.c, simple-goto-elim.c, toplev.c, + tree-alias-common.c, tree-cfg.c, tree-dfa.c, tree-dump.c, + tree-inline.c, tree-mudflap.c, tree-simple.c, tree-simple.h, + tree-ssa-ccp.c, tree-ssa-pre.c, tree-ssa.c, tree.h, doc/invoke.texi: + Rename SIMPLE to GIMPLE everywhere. + +2003-06-13 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (bsi_commit_first_edge_insert): Only consider non-abnormal + edges when determining whether an edge needs to be split. + + * tree-ssa-dce.c (process_worklist): When checking for GOTO and + COND_EXPR's that are necessary, check each BB's predecessors only once. + +2003-06-12 Jeff Law <law@redhat.com> + + * tree-ssa.c (avail_expr_eq): Add some checking code to + detect when equal expressions have different hash values. + + * tree.c (iterative_hash_expr): Don't hash types associated + with conversions. Instead hash on the signedness of the + toplevel object and the operand of the conversion. + + * Makefile.in (gimplify.o): Depend on $(RTL_H). Ugh. + * gimplify.c: Include "rtl.h". + (simplify_call_expr): Use call_expr_flags and check for ECF_CONST + rather than checking bits in the tree node directly. + + * fold-const.c (operand_equal_p): CALL_EXPRs with side effects + are never equal. + +2003-06-11 Frank Ch. Eigler <fche@redhat.com> + + * gcc.c (MFWRAP_SPEC): Always wrap main(). + * tree-mudflap.c (mudflap_enqueue_decl): Mark enqueued decls + to prevent their repeated processing. + +2003-06-11 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c: add graph_dump_file, graph_dump_flags. + (finalize_1): Modify to use temporary in expr_info structure, + remove temporary from arguments. + Use bsi_insert_on_edge for ephi insertions. + Set EREF_TEMP on inserted euses. + (repair_phi_injury): Note (to dump file) injuries we have + repaired already. + (repair_use_injury): Ditto. + (repair_euse_injury): Ditto. + (count_stmts_in_bb): Count both forwards and backwards, and make + sure the numbers agree. This makes sure both the head and end are + updated properly. + (code_motion): Use the EREF_TEMP, rather than calculating the + reaching def, when possible, because it's faster. + Add the phi we created when we insert the ephi. We should always + be able to get the reaching def of the ephi from EREF_TEMP (since + the args should have already been inserted, or in the case of + phi's, have a phi already allocated), so abort if we can't. + (create_expr_ref): Take expr_info parameter. Make a phi for the + ephi's, but don't add to the bb yet. Update all callers. + (get_default_def): New function. + (get_reaching_def): Use it to find the default def when we hit the + top of the dom tree. + (struct expr_info): Add temp. + (new_rename_1): Dump out occurrences after rename 1, but before + rename 2. + (requires_edge_placement): Now that we can insert on edges, we + shouldn't need this, so make it always return false. + Will remove unless something bad comes up. + (pre_expression): Start working on dumping the redundancy graph. + + * tree.h (struct treeeref_common): Add the temp member. + Add EREF_TEMP macro. + (tree_dump_index): Reorder to match actual optimization order. + Add TDI_predot. + + * tree-dump.c: Ditto. + +2003-06-11 Jeff Law <law@redhat.com> + + * gimplify.c (simplify_call_expr): Clear TREE_SIDE_EFFECTS for + calls to "const" functions. + + * tree-inline.c (expand_call_inline): Recalculate TREE_SIDE_EFFECTS + properly when inlining gimplified functions. + + * fold-const.c (operand_equal_p): Handle CALL_EXPRs. + + * tree-cfg.c (first_exec_block): Kill. + (make_edges): Use bb_for_stmt rather than first_exec_block. + (make_ctrl_stmt_edges, make_exit_edges): Likewise. + (make_loop_expr_edges, make_cond_expr_edges): Likewise. + (successor_block): Don't skip empty statements. + + * tree-ssa.c (rewrite_and_optimize_stmt): Do not special case + CALL_EXPRs they're caught by the TREE_SIDE_EFFECTS test. + + * tree-ssa.c (rewrite_and_optimize_stmt): Improve/correct setting of + may_optimize_p. Simplify later code knowing may_optimize_p is + correctly set. + (avail_expr_hash): Do not use iterative_hash_object or deal with + SSA names for real operands. Instead use iterative_hash_expr + which handles both. + (avail_expr_eq): Use operand_equal_p to test for equality. + +2003-06-11 Steven Bosscher <steven@gcc.gnu.org> + + * tree-flow.h, tree-ssa-ccp.c, tree-ssa-copyprop.c, + tree-ssa-dce.c, tree-ssa-live.c, tree-ssa-live.h: + Convert function prototypes to ISO C. + +2003-06-10 Jeff Law <law@redhat.com> + + * toplev.c (parse_options_and_default_flags): Fix typo in last change. + + * gimplify.c (simplify_expr, case BIT_FIELD_REF): Make sure + to call recalculate_side_effects after gimplifying the + operands. + +2003-06-10 Diego Novillo <dnovillo@redhat.com> + + * toplev.c (flag_tree_dom): New variable. + (f_options): Add new entry for -ftree-dominator-opts. + (parse_options_and_default_flags): Enable flag_tree_dom for + -O1 and higher. At -O2 and higher, disable flag_tree_dom is + SSA-PRE is also specified. + * flags.h (flag_tree_dom): Declare. + * doc/invoke.texi: Document -ftree-dominator-opts. + * tree-ssa.c (rewrite_block): Disable tracking of available + expressions when not doing dominator optimizations. + Call rewrite_stmt when not doing dominator optimizations. + Otherwise, call rewrite_and_optimize_stmt. + (rewrite_stmt): Don't optimize the statement. Just rename. + (rewrite_and_optimize_stmt): Optimize the statement while rewriting + its operands. + (lookup_avail_expr): Update comments. + +2003-06-10 Andrew Haley <aph@redhat.com> + + * c-simplify.c (c_simplify_stmt): case ASM_STMT: Ensure qualifiers + come from input statement. + +2003-06-09 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (handle_switch_split): Update PHI nodes when splitting. + (tree_split_edge): Update PHI nodes in destination block. + +2003-06-09 Steven Bosscher <steven@gcc.gnu.org> + + * basic-block.h, tree-dfa.c, tree-ssa.c, tree-cfg.c, + tree-flow.h: Convert function prototypes to ISO C. + +2003-06-09 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg.c (bsi_commit_edge_inserts): Fix computation of + new_blocks. + +2003-06-08 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (handle_switch_split): Don't allocate basic block + annotations more than once. + (bsi_commit_first_edge_insert): Likewise. + +2003-06-07 Jeff Sturm <jsturm@one-point.com> + + * tree-cfg.c (could_trap_p): New function. + (stmt_ends_bb_p): Handle flag_non_call_exceptions. + (make_exit_edges): Handle flag_non_call_exceptions. + (is_ctrl_altering_stmt): Handle flag_non_call_exceptions. + * tree-inline.c (walk_tree): Add case for CHAR_TYPE. + * tree-ssa-dce.c (stmt_useful_p): Keep all CATCH_EXPRs. + +2003-06-05 Jason Merrill <jason@redhat.com> + + * stmt.c (asm_op_is_mem_input): New fn. + * tree.h: Declare it. + * gimplify.c (simplify_asm_expr): Call resolve_asm_operand_names. + Use is_simple_modify_expr_lhs for mem input ops. + +2003-06-05 Frank Ch. Eigler <fche@redhat.com> + + * c-mudflap.c (mflang_register_call): Give the synthetic decl + undefined (not zero) size. + +2003-06-05 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mx_flag): Remove. Update callers to use mf_mark. + (TREE_MUDFLAPPED_P): Remove. Update callers to use mf_marked_p. + (mf_mark, mf_marked_p): Replacement functions to replace old node + marking based on tree flag-bits. + (mf_mostly_copy_tree_r): Preserve markedness across copies. + * tree-mudflap.h: Add new decls + * c-mudflap.c (mx_flag): Remove. Update callers to use mf_mark. + +2003-06-04 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_stmt_operand): Always consider non-scalar types + virtual operands. + +2003-06-04 Andrew MacLeod <amacleod@redhat.com> + + * toplev.c (parse_options_and_default_flags): Turn tree_copyprop on by + default. + * tree-cfg.c (linearize_control_structures, linearize_cond_expr, + replace_stmt, merge_tree_blocks, remap_stmts): Fix PROTOS. + (find_insert_location): Add additional basic block parameter. Handle + switch stmts. + (handle_switch_split): New. Split edges to switch labels. + (bsi_commit_first_edge_insert): Add extra parameter to + find_insert_location call. Fix split block chaining in THEN & ELSE. + * tree-ssa-live.c (calculate_live_on_entry): Process all PHI def's + after all the arguments have been processed. + * tree-ssa.c (struct ssa_stats_d, struct loops *loops, var_is_live, + rewrite_into_ssa): Remove old UNSSA code. + (rewrite_block): Remove stmt is rewrite_stmt returns 1. + (assign_vars): Remove abort and enable overlapping live ranges. + (replace_variable): New. Replace SSA name with the partition variable. + (rewrite_out_of_ssa): Use replace_variable(). + (dump_tree_ssa_stats): Remove old UNSSA code. + (rewrite_stmt): Return 1 if stmt should be deleted. Remove old + UNSSA code. + +2003-06-03 Diego Novillo <dnovillo@redhat.com> + + * gimplify.c (simplify_call_expr): Move code to mark MD builtins + non-simplifiable... + * tree-simple.c (is_simple_call_expr): ... here. + +2003-06-03 Diego Novillo <dnovillo@redhat.com> + + * c-parse.in: Fix botched merge. + +2003-06-03 Diego Novillo <dnovillo@redhat.com> + + * tree-mudflap.c (MARK_TREE_MUDFLAPPED, TREE_MUDFLAPPED): + Use TREE_VISITED instead of TREE_BOUNDED. + * c-mudflap.c (TREE_MUDFLAPPED): Likewise. + * tree-pretty-print.c (dump_generic_node): Remove + references to TYPE_QUAL_BOUNDED. + +2003-06-03 Jason Merrill <jason@redhat.com> + + * gimplify.c (simplify_cond_expr): Call truthvalue_conversion + before invert_truthvalue. + +2003-06-02 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (compute_may_aliases): Call delete_alias_vars whenever we + call create_alias_vars. + + * tree-alias-common (ptr_may_alias_var): Cleanup determination of + global vars and whatnot. + +2003-06-02 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa.o, tree-cfg.o): Add dependency on cfgloop.h + (tree-optimize.o): Remove dependency on cfgloop.h. + * basic-block.h (struct basic_block_def): Fix documentation for + field 'loop_father'. + * tree-dfa.c (add_referenced_var): Fix type of element + pushed into aliased_objects_alias_set. + * tree-optimize.c: Don't include cfgloop.h + (optimize_function_tree): Move code to initialize loop optimizer... + * tree-cfg.c (build_tree_cfg): ... here. + * tree-ssa.c: Include cfgloop.h. + (loops): New file local variable. + (rewrite_into_ssa): Initialize/finalize loop optimizer. + (rewrite_stmt): Call var_is_live when processing redundant + assignments to the same LHS. + (var_is_live): Add heuristic to discover overlapping definitions in + loops that do not have PHI nodes for VAR at the loop header. + +2003-06-02 Jason Merrill <jason@redhat.com> + + * gimplify.c (simplify_expr): Only allow a cast from a 'val'. + * tree-simple.c (is_simple_cast): Likewise. + +2003-06-02 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (bsi_insert_before): Update end of block pointer if we + inserted before the last stmt in a block. (The container changed). + * tree-ssa.c (elim_backward): Inserting copy should be within + conditional check. + (elim_create): Only select one bit instead of the all. + +2003-06-01 Jason Merrill <jason@redhat.com> + + * Makefile.in: Remove lots of -Wno-error targets. + + * tree-simple.c (recalculate_side_effects): Check TREE_THIS_VOLATILE. + + * gimplify.c (simplify_compound_lval): Call + recalculate_side_effects on each of the subexpressions. + + * expr.c (expand_expr) <COND_EXPR>: Use the if-statement code if + it's void. + +2003-06-01 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c: Remove setting of DECL_CONTEXT in temp vars, + it's done in create_tmp_alias_var for us. + (ptr_may_alias_var): Check if the variables are memory tags, and get + the associated pointers if they are. + +2003-05-30 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mudflap_c_function, enqueue_constant, enqueue_decl): + Rework dumping logic. + +2003-05-27 Jason Merrill <jason@redhat.com> + + * tree-ssa.c (avail_expr_hash): Simplify by using iterative_hash_expr + in more places. + * tree.c (iterative_hash_expr): Handle SSA_NAME. + +2003-05-29 Jeff Law <law@redhat.com> + + * tree-ssa.c (rewrite_stmt): Detect and remove redundant + memory loads. + (avail_expr_hash): Use iterative_hash_expr, not iterative_hash_object + as needed. + +2003-05-27 Jason Merrill <jason@redhat.com> + + * gimplify.c (shortcut_cond_expr): Avoid jumps to jumps. + +2003-05-26 Jason Merrill <jason@redhat.com> + + * c-simplify.c (simplify_switch_stmt): A SWITCH_EXPR also gets the + source location of its first line. + +2003-05-24 Diego Novillo <dnovillo@redhat.com> + + Do not consider INDIRECT_REF nodes to be variables. + + * gimplify.c (create_tmp_alias_var): Allow temporaries of + ARRAY_TYPE to be created. + Create new temporaries with function scope. + Don't call build_type_variant. + Mark the temporary volatile if its type is volatile. + + * tree-dfa.c: Change every function that received a variable and + its base symbol to just receive the variable. Update all callers. + (struct alias_set_d): Remove field 'tag_sym'. + Add documentation for fields. + (struct walk_state): Add field 'is_indirect_ref'. + Add documentation for fields. + (opf_ignore_bp): Remove. Update all users. + (aliased_objects_base): Remove. Update all users. + (get_stmt_operands): If the statement had virtual operands, do not + scan them again. + (get_expr_operands): Handle INDIRECT_REF nodes by adding an operand + for the memory tag represented and a use for the base pointer. + Don't add VUSE operands for pointer arguments to functions. + Force a virtual operand when processing ADDR_EXPR nodes. + (add_stmt_operand): If the variable is an alias tag, always add it + as a virtual operand. + Remove code to handle INDIRECT_REF nodes. + Move code to determine if a pointer may point to global memory to + find_vars_r. + Set has_volatile_ops flag in the statement when adding operands for + globals and local statics. + If the variable is an alias tag, mark the statement as making + aliased loads or stores. + (set_def): Mark the variable as having real references. + (add_use): Likewise. + (add_vdef): Remove code to re-add previous virtual operands. + If PREV_VOPS is set, don't add a new virtual operand. + (add_vuse): Likewise. + (dump_variable): Show annotation bitfields 'mem_tag', + 'occurs_in_abnormal_phi', 'is_alias_tag' and 'is_stored'. + (compute_may_aliases): Initialize walk_state.is_indirect_ref to 0. + (compute_alias_sets): Don't remove alias sets with exactly one + entry. + (register_alias_set): Re-implement to support memory tags instead + of INDIRECT_REF nodes. Document algorithm. + (find_alias_for): Likewise. + (may_alias_p): Likewise. + (add_may_alias): Likewise. + (find_vars_r): If a pointer assignment is found and the RHS of the + assignment may access global memory, mark the pointer as pointing + to global memory. + Handle INDIRECT_REF nodes by marking the base pointer as + dereferenced. + Do not share INDIRECT_REF nodes. + (add_referenced_var): Don't handle INDIRECT_REF nodes. + If called from a store operation, mark the variable as stored. + By default mark the variable as not having real references. + When processing a pointer that has been dereferenced, create a + memory tag for the pointer. + (add_indirect_ref_var): Remove. Update all callers. + (get_virtual_var): Don't handle INDIRECT_REF nodes. + (find_hidden_use_vars_r): + + * tree-flow-inline.h (get_var_ann): New function. Change all + functions that called var_ann and create_var_ann to call + get_var_ann. + (get_stmt_ann): Likewise. + (set_indirect_ref): Remove. Update all callers. + (indirect_ref): Remove. Update all callers. + (create_indirect_ref): Remove. Update all callers. + + * tree-flow.h (struct var_ann_d): Remove fields 'is_loaded', + 'unused' and 'indirect_ref'. + Add fields 'mem_tag', 'is_mem_tag', 'is_alias_tag' and + 'has_real_refs'. + (get_var_ann, get_stmt_ann): Declare. + (create_indirect_ref, set_indirect_ref, indirect_ref): Remove. + + * tree-pretty-print.c (dump_generic_node): Don't handle + INDIRECT_REF nodes inside SSA_NAME nodes. + + * tree-simple.c (get_base_symbol): Don't handle INDIRECT_REF nodes. + (is_simple_unary_expr): Don't call STRIP_NOPS. + + * tree-ssa-copyprop.c (get_original): Don't handle INDIRECT_REF + nodes. Allow pointers to be copy propagated. + + * tree-ssa-dce.c (need_to_preserve_store): Don't handle + INDIRECT_REF nodes. + + * tree-ssa-live.c (create_ssa_var_map): Only process variables that + have real references. + + * tree-ssa.c: Update documentation regarding INDIRECT_REF nodes. + (update_indirect_ref_vuses): Remove. Update all users. + (update_pointer_vuses): Remove. Update all users. + (MAY_COPYPROP_P): Remove. Update all users. + (create_temp): Don't handle INDIRECT_REF nodes. + (coalesce_ssa_name): Ignore variables that have no real references. + (rewrite_stmt): Mark the statement modified if a new copy or + constant was propagated into it. + Don't special-case pointers. + (rewrite_operand): Don't handle INDIRECT_REF nodes. + * tree.h (SSA_VAR_P): Remove. Update all users. + (SSA_DECL_P): Rename to SSA_VAR_P. + +2003-05-22 Jeff Law <law@redhat.com> + + * gimplify.c (simplify_expr): Avoid gimplifying expressions which + are already in gimple form. + * tree-simple.c (is_simple_constructor): No longer treat TREE_STATIC + constructors specially. + (is_simple_addr_expr_arg): If we're taking the address of a label + for the first time, then the ADDR_EXPR is not in gimple form. + +2003-05-22 Jason Merrill <jason@redhat.com> + + * tree-cfg.c (compute_reachable_eh): Don't skip cleanups. + + * tree-dfa.c (add_referenced_var): Read-only INDIRECT_REFs can + also be clobbered by function calls. + +2003-05-22 Jeff Law <law@redhat.com> + + * expr.c (convert_move): Avoid making silly copies. + (expand_expr, case BIND_EXPR): Correctly determine when the + result of the BIND_EXPR will not be used. + +2003-05-21 Jason Merrill <jason@redhat.com> + + * tree-cfg.c (compute_reachable_eh): Handle multiple CATCH_EXPRs. + + * builtins.c (simplify_builtin_next_arg): Split out from... + (expand_builtin_next_arg): ...here. + (simplify_builtin_va_start): Split out from... + (expand_builtin_va_start): ...here. + (simplify_builtin): Call it. + * gimplify.c (simplify_call_expr): If simplify_builtin worked, + just return. + +2003-05-20 Jason Merrill <jason@redhat.com> + + * gimplify.c (shortcut_cond_expr, shortcut_cond_r): Rewrite. + (simplify_cond_expr): Also invert ifs with no 'then'. + (build_and_jump): New fn, split out from... + (gimplify_exit_expr): ...here. Don't bother gimplifying the + condition. + + * gimplify.c (simplify_save_expr): Add post-effects to the + postqueue. + + * gimplify.c (mostly_copy_tree_r): Don't unshare constants. + +2003-05-20 Jeff Law <law@redhat.com> + + * expr.c (expand_expr, case COND_EXPR): Avoid useless RTL generation + when the THEN or ELSE arm is empty. + + * tree-cfg.c (make_loop_expr_blocks): Do not accept next_block_link + as an argument, make it a local variable. Callers changed. + + * tree-cfg.c (remove_useless_stmts_and_empty_vars): Eliminate + GOTO_EXPRs which jump to the next statement occuring in an + outer control/block structure nest. + +2003-05-20 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (set_rhs): Fix typo in handling of + RETURN_EXPR nodes. + +2003-05-19 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c (alias_get_name): Handle unnamed variables once + and for all. + +2003-05-19 Jeff Law <law@redhat.com> + + * tree-ssa-dce.c (remove_conditional): If the conditional's block + has no post dominator in the CFG, then wire it to the exit node. + Avoid unnecessary check of bb->succ. + +2003-05-17 Daniel Berlin <dberlin@dberlin.org> + + * tree-pretty-print.c (MASK_POINTER): Parameter is P, not node. + +2003-05-17 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c (get_alias_var): Handle REFERENCE_EXPR. + (find_func_aliases): Ditto. + (get_alias_var): Use POINTER_TYPE_P. + +2003-05-16 Frank Ch. Eigler <fche@redhat.com> + + * gcc.c (cc1_options): Correct "-fmudflapth" handling. + * tree-mudflap.c (mudflap_c_function, mf_build_check_statement_for): + Use locally cached mask/shift values only in single-threaded mode. + +2003-05-16 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c (ptr_may_alias_var): Fix DECL_CONTEXT + checking. + +2003-05-16 Andrew MacLeod <amacleod@redhat.com> + + * tree-flow.h (ssa_make_edge): Remove prototype. + * tree-ssa-dce.c (remove_dead_stmt): Change comment about removing + conditionals. + (remove_conditional): Don't update PHI nodes or call ssa_make_edge. + * tree-ssa.c (ssa_make_edge): Remove. + +2003-05-16 Jeff Law <law@redhat.com> + + * tree-cfg.c (remove_useless_stmts_and_vars): Handle case where + both arms of an if-then-else simply jump to the same location. + + * tree-ssa-ccp.c (get_rhs): Correctly handle MODIFY_EXPR embedded in + a RETURN_EXPR. + (set_rhs): Likewise. + +2003-05-15 John David Anglin <dave.anglin@nrc-cnrc.gc.ca> + + * Makefile.in (regmove.o-warn): Change to -Wno-error. + +2003-05-15 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (enum find_location_action): Enum for find_insert_location. + (bsi_insert_before): Handle insert at start of a BB and update pointers + from parents if appropriate. + (find_insert_location): Handle COND_EXPR properly. Return + an enum type indicating what action to take on the returned value. + (bsi_commit_first_edge_insert): Use new returned action. + +2003-05-15 Jeff Law <law@redhat.com> + + * tree-cfg.c (make_edges): Factor out loop invariants from + code to insert edges from the TRY to the FINALLY block. + Avoid creating unnecessary edges from the end of the + FINALLY block back to the start of the FINALLY block. + +2003-05-15 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa.c (rewrite_out_of_ssa): Undo previous patch. + +2003-05-15 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa.c (rewrite_out_of_ssa): Don't dump the optimized + function after the SSA->normal pass. + +2003-05-14 Toon Moene <toon@moene.indiv.nluug.nl> + + * Makefile.in: Add additional -Wno-error targets for Alpha. + +2003-05-13 Jason Merrill <jason@redhat.com> + + * gdbinit.in (pgs, pge): New macros. + + Implement expression temporary optimization. + * gimplify.c (gimplify_ctx): Add temp_htab field. + (push_gimplify_context): Initialize it. + (pop_gimplify_context): Destroy it. + (simplify_expr): If there's no internal postqueue, generate an + expression temporary. + (gimple_tree_hash, gimple_tree_eq): New fns. + (create_tmp_from_val, lookup_tmp_var): New fns. + (get_formal_tmp_var): New fn. + (internal_get_tmp_var): New fn. + (get_initialized_tmp_var): Use it. + * tree-simple.h: Declare it. + + * gimplify.c (simplify_cond_expr): Reorganize. + (shortcut_cond_expr, shortcut_cond_r): New fns. + (build_and_jump): New fn. + (gimplify_exit_expr): Use it. + + * gimplify.c (simplify_expr): Do better at stripping unnecessary + NOPs. Tidy GOTO_EXPR handling. Don't allow NON_LVALUE_EXPR. + * tree-simple.c (is_simple_modify_expr): Don't allow NON_LVALUE_EXPR. + (is_simple_binary_expr, is_simple_condexpr): Likewise. + (is_simple_unary_expr, is_simple_compound_lval): Likewise. + (is_simple_id): Likewise. + + * tree-ssa.c (rewrite_stmt): Discard redundant assignments. + (avail_expr_eq): Don't test ops1 == ops2. + (avail_expr_hash): Use iterative_hash_object. + +2003-05-13 Jeff Law <law@redhat.com> + + * tree-cfg.c (cleanup_tree_cfg): Update comments. Set repeat + anytime we remove a control structure. + + * tree-flow.h (struct var_ann_d): New field occurs_in_abnormal_phi. + * tree-ssa.c (MAY_COPYPROP_P): Do not allow copy propagations + if either argument occurs in an abnormal phi. + * tree-dfa.c (add_phi_arg): Set occurs_in_abrnomal_phi as needed. + * tree-ssa-copyprop.c (copyprop_stmt): Do not allow copy + propagations if either argument occurs in an abnormal phi. + (copyprop_phi): Likewise. + +2003-05-12 Diego Novillo <dnovillo@redhat.com> + + * c-common.h (STATEMENT_CODE_P): Use size_t cast instead + of int. + (INIT_STATEMENT_CODES): Change type of local variable i to + size_t. + +2003-05-12 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c (dump_c_node): Call CONSTRUCTOR_ELTS + to access the operand of a CONSTRUCTOR node. + * tree-pretty-print.c (dump_generic_node): Likewise. + +2003-05-11 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_if_stmt): Replace calls to + warning_with_file_and_line with warning. + +2003-05-12 Frank Ch. Eigler <fche@redhat.com> + + * toplev.c (lang_independent_options): Add "-fmudflapth". + * flags.h (flag_mudflap): Document meaning of >1 value. + * gcc.c (MFWRAP_SPEC, MFLIB_SPEC): Add -fmudflapth support. + (cpp_unique_options, cc1_options): Ditto. + +2003-05-10 Sebastian Pop <s.pop@laposte.net> + + * gimplify.c (simplify_expr): Replace CONST_DECL with its DECL_INITIAL. + +2003-05-09 Sebastian Pop <s.pop@laposte.net> + + * tree-optimize.c (optimize_function_tree): Clarify the use of the + loop analyzer. + +2003-05-09 Jeff Law <law@redhat.com> + + * c-simplify.c (simplify_cleanup): Remove code which optimizes + TRY_FINALLY and TRY_CATCH. It doesn't trigger. + + * tree-cfg.c (remove_useless_stmts_and_vars): Optimize away + TRY_CATCH and TRY_FINALLY blocks when possible. + +2003-05-09 Diego Novillo <dnovillo@redhat.com> + + * tree-pretty-print.c (dump_generic_node): CONSTRUCTOR + nodes have only one operand now. + +2003-05-08 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (pdom_info): New file level static. + (cleanup_tree_cfg): Free dominance info, if it was used. + (bsi_replace): New. Replace a stmt with a new one. + (linearize_cond_expr): Use post dominator info to determine is a + conditional can be safely removed. + (find_insert_location): New. Determine where to insert a new stmt that + is placed on a split edge. + (bsi_commit_first_edge_insert): Use find_insert_location to determine + where to link a stmt when splitting an edge. + (merge_tree_blocks): When deleting a basic block, remove it from the + dominance structure if it exists. + * tree-dfa.c (add_stmt_operand): Don't rename local statics. Treat + them just like globals. + * tree-flow.h (struct var_ann_d): Add root_var_processed bit and + root_index fields. + * tree-ssa-dce.c (process_worklist): Mark conditions feeding PHI's as + necessary as well. + (remove_dead_phis): Add missing debug information. + * tree-ssa-live.c (var_union): Handle combining partitions when one + has a root_variable as a representative. + (compact_var_map): Add comments and use flags. + (init_root_var): Use new root_var fields in struct var_ann_d. + (dump_root_var): Send output to specified file, not stderr. + (dump_var_map): Remove dump_flag parameter & some grotesque debug info. + * tree-ssa-live.h (VAR_ANN_ROOT_INDEX): Define. + (VARMAP_NORMAL, VARMAP_NO_SINGLE_DEFS): Define flags for compact_var_map. + (var_to_partition_to_var): Return NULL if not in a partition. + (find_root_var): Use VAR_ANN_ROOT_INDEX. + * tree-ssa.c (insert_copy_on_edge): Add listing info. + (coalesce_ssa_name): Coalesce live-on-entry variables to their root. + Coalesce partitions across abnormal edges. + (assign_vars): Remove redundant initialization code. Handle root_vars + which have already been coalesced to a partition. + (rewrite_out_of_ssa): Add debug info & remove PHI nodes when processed. + (rewrite_stmt): Don't redefine redundant expressions. + +2003-05-08 Jeff Law <law@redhat.com> + + * c-simplify.c (simplify_expr_stmt): Make sure to + simplify the body of the EXPR_STMT. + + * tree-dfa.c (remove_decl): Accept new argument for the block + to start the search. + * tree-flow.h (remove_decl): Update prototype. + * tree-cfg.c (remove_stmt): Pass the toplevel block to + remove_decl. + + * tree-dfa.c (find_hidden_use_vars): No longer returns a value. + Callers and prototype updated. No longer need to look for + nested functions, instead just mark any variables and + parameters with DECL_NONLOCAL set as having hidden uses. + +2003-05-08 Diego Novillo <dnovillo@redhat.com> + + * version.c (version_string): Change format to show daily + datestamp and merged date. + +2003-05-07 Jeff Law <law@redhat.com> + + * tree-cfg.c (remove_useless_stmts_and_vars): Do not remove + the toplevel BIND_EXPR for an inlined function. + + * tree-dfa.c (find_hidden_use_vars): Look at the size of + VAR_DECLs, not the size of ARRAY_TYPES. Also make sure + to reset *inside_vla to its original value when done + processing any particular VAR_DECL. + +2003-05-06 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_if_stmt): Warn if + -Wunreachable-code is given and the conditional is always + true or always false. + + * expr.c (expand_expr): Don't try to expand FUNCTION_DECL + nodes when processing BIND_EXPR_VARS. + + * varasm.c (output_constant_def_contents): Re-use the + label when emitting a label for mudflap. + + Disable the following patch: + + 2003-04-30 Steven Bosscher <steven@gcc.gnu.org> + + * ggc-page.c (TREE_EXP_SIZE): Define. + (extra_order_size_table): New entry for expr trees with + two operands. + +2003-05-06 Jeff Law <law@redhat.com> + + * tree-cfg.c (make_exit_edges): Fix handling of blocks which + end with calls. + + * tree-cfg.c (remove_useless_stmts_and_vars): Remove GOTO_EXPRs + to the immediately following tree node. + + * tree-cfg.c (make_goto_expr_edges): Fix typo in comment. + (remove_useless_stmts_and_vars): New function. + * tree-flow.h (remove_useless_stmts_and_vars): Prototype. + * tree-ssa.c (rewrite_out_of_ssa): After returning to normal + form, call remove_useless_stmts_and_vars. + +2003-05-02 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c (alias_get_name): Given unnamed result decls + a name. + (create_fun_alias_var): Use DECL_RESULT if available. + +2003-05-02 Jeff Law <law@redhat.com> + + * tree-inline.c (expand_call_inline): Avoid creating naked + _DECL nodes for inlined functions which had NRV optimizations + applied. + +2003-05-02 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (build_tree_cfg): Update comment. + (make_blocks): Don't skip over empty statements. + Move exception handling code ... + (compute_reachable_eh): ... here. + (set_parent_stmt): Don't skip over empty statements. + (bsi_remove): Don't return early on empty statements. + Don't call STRIP_NOPS. + (remove_stmt): Don't call STRIP_NOPS. + Always compute the block holding the statement. + After replacing the statement with an empty statement, add the + empty statement to the block. + (successor_block): Don't call STRIP_NOPS. + (first_exec_stmt): Likewise. + (first_exec_block): Don't return early for empty statements. + (first_stmt): Don't test for NULL blocks. + Reformat to improve legibility. + (bsi_next_in_bb): Don't call STRIP_NOPS. + Reformat to improve legibility. + (set_bb_for_stmt): Don't ignore empty statements. + + * tree-dfa.c (get_stmt_operands): Don't call STRIP_NOPS. + (create_stmt_ann): Don't abort on emtpy statements. + Don't call STRIP_NOPS. + (copy_stmt): Remove unused function. + * tree-flow.h (copy_stmt): Remove prototype. + + * tree-flow-inline.h: Don't call STRIP_NOPS. + Remove local variable 't'. + (bsi_stmt): Don't return NULL_TREE for empty statements. + Ignore error_mark_node. + + * tree-iterator.h (tsi_next): Don't call STRIP_NOPS. + (tsi_stmt_ptr): Likewise. + (tsi_stmt): Likewise. + Don't return NULL_TREE for empty statements. + + * tree-pretty-print.c (dump_generic_node): Don't ignore empty + statements. + + * tree-ssa-ccp.c (fold_stmt): Don't call STRIP_NOPS. + * tree-ssa-dce.c (find_useful_stmts): Likewise. + (remove_dead_stmt): Likewise. + * tree-ssa.c (mark_def_sites): Likewise. + (rewrite_out_of_ssa): Likewise. + (rewrite_stmt): Likewise. + + * tree.c (make_ssa_name): Don't ignore empty statements. + (body_is_empty): Fix comment. + +2003-05-01 Jeff Law <law@redhat.com> + + * tree-dfa.c (find_hidden_use_vars): Renamed from find_vla_decls. + Now returns a value indicating if nested function was found. + When nested functions are found, mark suitable variables as + having hidden uses. + (find_hidden_use_vars_r): Renamed from find_vla_decls_r. + (compute_may_alias): Corresponding changes. Handle + multiple BLOCKs at the toplevel of a function. + +2003-04-30 Diego Novillo <dnovillo@redhat.com> + + * tree.c (build_empty_stmt): New function. + * tree.h (IS_EMPTY_STMT): Define. + (TI_EMPTY_STMT): Remove. + (empty_stmt_node): Remove. + Replace 'X = empty_stmt_node' with 'X = build_empty_stmt ()', + and 'X == empty_stmt_node' with 'IS_EMPTY_STMT (X)' everywhere. + (build_empty_stmt): Declare. + + * cp/cp-simplify.c (cp_simplify_stmt): Use IS_EMPTY_STMT. + + * java/java-tree.h (build_java_empty_stmt): Declare. + * java/expr.c (build_java_empty_stmt): New function. + * java/decl.c (java_init_decl_processing): Don't build empty_stmt_node. + Replace 'X = empty_stmt_node' with 'X = build_java_empty_stmt ()', + and 'X == empty_stmt_node' with 'IS_EMPTY_STMT (X)' everwhere. + +2003-04-30 Jeff Law <law@redhat.com> + + * tree-dfa.c (get_expr_operands): Do not ignore operands of an + an ADDR_EXPR if it is a PARM_DECL or VAR_DECL. + + * tree-dfa.c (get_expr_operands): Look inside operands in + a TREE_LIST. + +2003-04-29 Diego Novillo <dnovillo@redhat.com> + + * builtins.def (BUILTIN_CONSTANT_P): Mark as constant. + + * tree-dfa.c (get_expr_operands): Do not add VDEF operands for + dereferenced pointers at call sites. + * tree-ssa.c (assign_vars): Abort if we couldn't coalesce all the + versions together. + +2003-04-29 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (bsi_start): If there are no stmts in a block, use the + context pointer to represent the basic block. + (bsi_insert_after): Handle inserting into empty blocks better. + (bsi_insert_before): Call bsi_insert_after to handle empty blocks. + * tree-ssa.c (elim_create): Clear bitmap after its been processed + instead of during loop. + +2003-04-27 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-mudflap.o): Add dependency on $(TREE_DUMP_H). + * c-decl.c (c_expand_body_1): Don't call simplify_function_tree + after mudflap_c_function. + Move mudflap instrumentation after SSA optimizers. + * tree-dump.c (dump_files): Add entry for -fdump-tree-mudflap. + * tree.h (enum tree_dump_index): Add TDI_mudflap. + * doc/invoke.texi: Document -fdump-tree-mudflap. + * tree-mudflap.c: Include tree-dump.h. + (dump_file): New local variable. + (dump_flags): New local variable. + (mudflap_c_function): Call dump_begin, dump_end and dump_function. + (mf_decl_cache_locals): Set DECL_CONTEXT for __mf_lookup_shift_l + and __mf_lookup_mask_l to current_function_decl. + (mf_offset_expr_of_array_ref): Likewise for __mf_index_X. + (mf_build_check_statement_for): Re-implement to emit a proper + STMT_EXPR. + (mx_xfn_indirect_ref): Emit detailed debugging info if + -fdump-tree-mudflap-details is given. + (mudflap_enqueue_decl): Likewise + * tree-optimize.c (optimize_function_tree): Don't check for + -fmudflap. + +2003-04-26 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (build_bc_goto): If the target label couldn't be + found, emit an error message. + +2003-04-25 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-live.c (compact_var_map): Add parameter to exclude variables + with a single SSA version. + (init_root_var): Allow that a var_map might not be compacted yet. + * tree-ssa-live.h (compact_var_map): Change Prototype. + * tree-ssa.c (rewrite_out_of_ssa): When coalescing, don't include single + reference variables during the compaction. + +2003-04-25 Jeff Law <law@redhat.com> + + * tree-optimize.c (optimize_function_tree): Simplify slightly. + +2003-04-25 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa.c (struct _elim_graph): Change type of fields + 'pred' and 'succ' to be bitmaps instead of sbitmaps. + Update all uses. + +2003-04-25 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (linearize_cond_expr): Reformat. + * tree-dfa.c (get_expr_operands): Check for read-only + status the dereferenced argument pointer, not the pointer + itself. + (add_stmt_operand): Always consider global variables as + virtual operands. + +2003-04-24 Jason Merrill <jason@redhat.com> + + * gimplify.c (simplify_cond_expr): Avoid redundant gimplification. + + Add TREE_VEC of case labels to the SWITCH_EXPR during gimplification. + * tree.def (CASE_LABEL_EXPR): Add an operand for the LABEL_DECL. + * tree.h (SWITCH_LABELS, CASE_LABEL): New macros. + * c-simplify.c (c_simplify_stmt) <CASE_LABEL>: Create LABEL_DECL here. + * expr.c (expand_expr) <CASE_LABEL_EXPR>: Not here. + * gimplify.c (gimplify_ctx): Add case_labels field. + (gimplify_switch_expr, gimple_add_case_label): New fns. + (simplify_expr): Use them. + +2003-04-24 Andrew MacLeod <amacleod@redhat.com> + + * tree-flow.h (processed_out_of_ssa): Rename to out_of_ssa_tag. + * tree-ssa-live.c (register_ssa_partition): Add variable to partition. + (change_partition_var): Use out_of_ssa_tag. + (create_ssa_var_map): Add all uses, defs and PHI elements to partition. + (new_tree_live_info): Create a live range info structure. + (delete_tree_live_info): Free storage. + (live_worklist): Fill in the live range info for a variable for the + blocks between the def and all the blocks containing uses. + (set_if_valid): Set partition bit if variable is in a partition. + (add_livein_if_notdef): Set live on entry bit for a var's partition + if a definition has not been seen. + (calculate_live_on_entry): Create partition live on entry bitmaps for + all basic blocks . + (calculate_live_on_exit): Calculate live on exit information for each + basic block. + (init_root_var): Initialize and fill in a root_var structure. + (remove_root_var_partition): remove a partition from a root_var list. + (delete_root_var): Free storage. + (dump_root_var): Display root_var summary. + (dump_var_map): Show extra info for ssa name versions. + * tree-ssa-live.h (NO_PARTITION): Define. + (register_ssa_partition): Remove. + (partition_to_var): Use partition_find after decompressing. + (var_to_partition): Return NO_PARTITION if var is not in a partition. + (struct tree_live_info_d): Define live range info structure. + (partition_is_global): Return 1 if used outside a basic block. + (live_entry_blocks): Return bitmap over blocks that partition is live + on entry to. + (live_on_exit): Return bitmap of partitions live on exit from a block. + (struct root_var_d): Define a root_var structure. + (ROOT_VAR_NONE): Define. + (num_root_vars): Number of variables in root_var object. + (root_var): Return variable for a root_var index. + (first_root_var_partition): Return first partition for a root_var. + (next_root_var_partition): Get next partition for a root_var. + (find_root_var): Find root_var index for a specific partition. + * tree-ssa.c (eliminate_extraneous_phis): Remove. + (set_if_valid): Set partition bit if variable is in a partition. + (add_conflicts_if_valid): Add conflict between variable and all + related partitions set in a bitvector. + (coalesce_ssa_name): Create a conflict graph and coalesce all + partitions which don't conflict and are related by the same root_var. + (assign_vars): Use a root_var object, and assign different real + variables to all partitions. + (rewrite_out_of_ssa): Call compact_var_map() once, and don't call + eliminate_extraneous_phis. + +2003-04-23 Daniel Berlin <dberlin@dberlin.org> + + * tree-flow.h (create_global_var): Add prototype. + + * tree-dfa.c (create_global_var): Externalize. + + * tree-alias-common.c: Set DECL_CONTEXT on our temp alias vars. + (call_may_clobber): Make a copy of this function, since our version + will be slightly different soon. + (create_alias_vars): We need global_var, so create it if necessary. + +2003-04-23 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (do_proper_save): Remove old code, since the new + insertion code works okay. + (pre_expression): Use new_rename_1, it removes a *lot* of useless + saves. + +2003-04-23 Jeff Law <law@redhat.com> + + * gimplify.c (simplify_target_expr): Make sure to simplify + the cleanup too. + + * tree-ssa.c (struct def_blocks_d): Add new field phi_insertion_points. + (compute_global_livein): Accept varray rather than bitmaps. Callers + updated. Rewrite to compute global life information for all the + objects in the varray in parallel. + (insert_phis_for_deferred_variables): New function. + (insert_phi_nodes_for): New argument DEF_MAPs. When an object + crosses the threshold for using fully pruned PHI insertions, + push it on the def_maps varray for deferred processing. + (insert_phi_nodes): Initialize def_maps. Pass it to + insert_phi_nodes_for. Drain the def_maps varray as it grows. + Also drain any residual objects in def_maps. Zero def_maps + when complete. + +2003-04-21 Jeff Law <law@redhat.com> + + * tree-cfg.c (find_contained_blocks_and_edge_targets): New function. + (try_finallys): New varray used during edge creation. + (make_edges): Initialize try_finallys varray. After creating + all the "normal" edges, go back and create the special edges + for the try-finally blocks. + (make_ctrl_stmt_edges): Create edges for the EH nodes. Also + make sure to build the try-finally stack. + (make_exit_edges): Create edges from calls which may throw + to any directly reachable exception handlers. + (is_ctrl_altering_stmt): Statements which may throw alter + flow control. + + * tree-cfg.c: Include except.h. + (eh_stack): New file-scoped varray. + (build_tree_cfg): Initialize eh_stack. + (make_catch_expr_blocks): New function. + (make_try_expr_blocks, make_eh_filter_expr_blocks): Likewise. + (make_blocks): Call new functions as needed. When ending a block + due to a statement that may throw, compute the reachable exception + handlers and store it in the statement's annotation. + (is_ctrl_stmt): Handle EH nodes. + (stmt_ends_bb_p): Likewise. + * tree-flow.h (stmt_ann_d): Add new field reachable_exception_handlers. + + * except.c (check_handled): No longer static. + * except.h (check_handled): Prototype. + + * c-simplify.c (c_build_bind_expr): Revert change from earlier today. + + * c-common.h (find_reachable_label): Prototype. + * c-semantics.c (find_reachable_label): No longer static. + * c-simplify.c (c_build_bind_expr): Avoid creating unnecessary + BIND_EXPRs. + (simplify_cleanup): Avoid creating unnecessary TRY_CATCH_EXPRs + or TRY_FINALLY_EXPRs. + (simplify_if_stmt): If the condition is constant and the + unexecuted arm has no reachable code, then just emit + the executed arm. + +2003-04-18 Sebastian Pop <s.pop@laposte.net> + + * cfghooks.h, cfghooks.c: New files. + * Makefile.in (BASIC_BLOCK_H): Depends on cfghooks.h. + (OBJS): Add cfghooks.o. + (tree-optimize.o): Depends on cfgloop.h. + (cfghooks.o): New rule. + * basic-block.h (split_edge): Rename to rtl_split_edge. + (tree_split_edge): Declare. + (create_bb): Declare extern here. + (verify_flow_info): Rename to rtl_verify_flow_info. + (tree_verify_flow_info): Declare. + (cfghooks.h): Included here. + * cfgloop.c (tree.h, tree-flow.h): Included. + (make_forwarder_block): Renamed to rtl_make_forwarder_block. + (tree_make_forwarder_block): New static function. + (blocks_headers): Declared static. + (HEADER_BLOCK): Use blocks_headers instead of bb's .aux field. + (redirect_edge_with_latch_update, make_forwarder_block, + canonicalize_loop_headers): Don't allocate .aux, but makes grow + the blocks_headers array. + (canonicalize_loop_headers): Register tree_make_forwarder_block + into the tree_cfg_hooks and rtl_make_forwarder_block into the + rtl_cfg_hooks structure. + (canonicalize_loop_headers): Initialize/free the blocks_headers + array rather than the bb's .aux field. + * cfgloopmanip.c (loop_split_edge_with_NULL): New static function. + (remove_path, force_single_succ_latches): + Call loop_split_edge_with_NULL instead of loop_split_edge_with. + * cfgrtl.c (split_block): Update the comment. + (split_edge): Renamed rtl_split_edge. + (verify_flow_info): Renamed rtl_verify_flow_info. + * loop-init.c (loop_optimizer_init, loop_optimizer_finalize): + Execute code following the value of cfg_level. + * toplev.c (rest_of_compilation): Call rtl_register_cfg_hooks. + * tree-cfg.c (create_bb): Declared extern. + (build_tree_cfg): Call tree_register_cfg_hooks. + (make_edges, make_exit_edges): Remove the use of EDGE_FALLTHRU. + (bsi_commit_first_edge_insert): Use split_edge. + (tree_split_edge, tree_verify_flow_info): New functions. + * tree-optimize.c (cfgloop.h): Included. + (optimize_function_tree): Add #if 0'ed calls to + loop_optimizer_init and loop_optimizer_finalize. + +2003-04-16 Jeff Law <law@redhat.com> + + * Makefile.in (tree-ssa.o): Depend on langhooks.h. + (tree-dfa.o, tree-cfg.o): Likewise. + * tree-cfg.c: Include langhooks.h + (dump_tree_cfg): Revamp how we get the current function's name + to not rely on current_function_name (and implicitly cfun). + (dump_cfg_stats, tree_cfg2dot): Likewise. + * tree-dfa.c: Include langhooks.h + (dump_immediate_uses): Revamp how we get the current function's name + to not rely on current_function_name (and implicitly cfun). + (dump_dfa_stats, dump_alias_info): Likewise. + * tree-ssa.c: Include langhooks.h + (dump_tree_ssa): Revamp how we get the current function's name + to not rely on current_function_name (and implicitly cfun). + + * tree-cfg.c (make_loop_expr_blocks): When determining the value for + NEXT_BLOCK_LINK, correctly handle empty statement nodes at the + end of the tree. + (make_cond_expr_blocks, make_switch_expr_blocks): Likewise. + (make_bind_expr_blocks): Likewise. + + * gimplify.c (keep_function_tree_in_gimple_form): Move check of + flag_disable_simple here. Include flags.h. + * Makefile.in (gimplify.o): Depends on flags.h + * c-decl.c (c_expand_body_1): No longer check flag_disable_simple. + * tree-inline.c (copy_body_r): Avoid creating non-gimple code + when inlining a function where the RESULT_DECL's initialization + is not on the RETURN_EXPR. + +2003-04-15 Jeff Law <law@redhat.com> + + * tree-flow.h (struct var_ann_d): Renamed is_vla_decl field to + has_hidden_use. + (has_hidden_use, set_has_hidden_use): Renamed from is_vla_decl + and set_vla_decl. + * tree-flow-inline.h (has_hidden_use): Renamed from is_vla_decl. + Updated to use "has_hidden_use" instead of "is_vla_decl" field. + (set_has_hidden_use): Renamed from set_vla_decl. + Updated to use "has_hidden_use" instead of "is_vla_decl" field. + * tree-dfa.c (dump_variable): Corresponding changes. + (find_vla_decls_r): Likewise. + * c-simplify.c (simplify_decl_stmt): Likewise. + * tree-ssa-dce.c: Likewise. + +2003-04-09 Jeff Law <law@redhat.com> + + * tree-dfa.c (struct alias_set_d, field tag_sym_set): Remove + unused field. + (register_alias_set): Rework to avoid incorrect coalescing of + entries. Fix memory leak. No longer set field tag_sym_set. + (get_expr_operands): ADDR_EXPR expressions may have interesting + operands in some cases. + +2003-04-09 Diego Novillo <dnovillo@redhat.com> + + * gimplify.c (simplify_expr): Handle VECTOR_CST nodes. + * tree-cfg.c (make_blocks): Ignore empty statement containers. + Create a basic block before processing containers that only have + empty statements. + (make_loop_expr_blocks): Use the container instead of the statement + when setting NEXT_BLOCK_LINK. + (make_cond_expr_blocks): Likewise. + (make_switch_expr_blocks): Likewise. + (make_bind_expr_blocks): Likewise. + (successor_block): If the last statement of the block is the empty + statement, use its container to get NEXT_BLOCK_LINK. + (stmt_starts_bb_p): Return false if the statement is NULL. + * tree-pretty-print.c (dump_generic_node): Handle VECTOR_CST nodes. + * tree-simple.c (is_simple_const): Accept VECTOR_CST as constants. + * objc/objc-lang.c (LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P): + Define. + +2003-04-06 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (remove_bb): Call ssa_remove_edge. + (cleanup_cond_expr_graph): Likewise. + (cleanup_switch_expr_graph): Likewise. + (disconnect_unreachable_case_labels): Likewise. + (merge_tree_blocks): Likewise. + Update PHI nodes at BB2's successor. + (dump_tree_bb): Show PHI nodes in the block. + * tree-dfa.c (add_phi_arg): Update comment. + (remove_phi_arg_num): New function. + (remove_phi_arg): Call it. + Move from tree-ssa.c. + (remove_phi_node): Move from tree-ssa.c. + * tree-flow.h (ssa_make_edge): Declare. + (ssa_remove_edge): Declare. + * tree-pretty-print.c (dump_generic_node): Show block where PHI + arguments are coming from. + * tree-ssa-dce.c (pdom_info): New local variable. + (remove_dead_stmts): Initialize it and free it at the end. + (remove_conditional): New function. + (remove_dead_stmt): Call it. + * tree-ssa.c (eliminate_phi): If the edge index is -1, abort + compilation. + (ssa_remove_edge): New function. + (ssa_make_edge): New function. + +2003-04-06 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (push_bsi): New. Push a block_stmt_iterator onto a stack. + (pop_bsi): New. Pop a block_stmt_iterator off a stack. + * tree-flow-inline.h (struct bsi_list_d): Block iterator stack struct. + (new_bsi_list): Start a new bsi stack. + (empty_bsi_stack): Is stack empty. + (FOR_EACH_BSI_IN_REVERSE): Macro for processing bsi's in reverse. + (FOR_EACH_STMT_IN_REVERSE): Macro for processing stmt's in reverse. + +2003-04-06 Andreas Jaeger <aj@suse.de> + + * treelang/treetree.c (tree_code_create_function_initial): Replace + calls to non-existent function annotate_with_file_line_column with + calls to annotate_with_file_line. + (tree_code_create_variable): Likewise. + +2003-04-05 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (get_expr_operands): Do not clobber readonly operands + in CALL_EXPRs. + (find_vars_r): Likewise. + (add_indirect_ref_var): When creating new INDIRECT_REF variables, + copy the readonly attribute from the variable's type. + +2003-04-05 Diego Novillo <dnovillo@redhat.com> + + * tree.c (copy_node): Never copy tree annotations. + +2003-04-05 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (visit_cond_stmt): Don't short circuit evaluation + of UNDEFINED conditional expressions. + +2003-04-04 Andrew MacLeod <amacleod@redhat.com> + + * Makefile.in : Add tree-ssa-live.c and tree-ssa-live.h files. + * tree-ssa.c (struct _var_map, create_var_map, delete_var_map, + var_from_partition, get_var_partition, mapped_var_from_ref, + compact_var_map, dump_tree_partition, set_partition_for_var, + set_var_mapping, create_var_partition): Remove. + (create_temp): Allow temps to be created from SSA_NAME vars as well. + (eliminate_name, eliminate_build, elim_backward, elim_create, + eliminate_phi): Use new var map interface. + (coalesce_ssa_name): New. Coalesce ssa_name ranges together. + (assign_vars): Assign real variables to ssa_name partitions. + (rewrite_out_of_ssa): Use new varmap partition and routines. + * tree-ssa-live.h: New file + (var_map): Structure for variable map. + (num_var_partitions): Number of partitions. + (partition_to_var): Return variable for partition. + (var_to_partition): Return partition variable is in. + (var_to_partition_to_var): Return variable representing partition + another variable is in. + (register_ssa_partition): Initialize a partition element as used. + * tree-ssa-live.c: New file. + (init_var_map): Initialize a var_map. + (delete_var_map): Free storage for a var_map. + (var_union): Combine 2 partitions. + (compact_var_map): Reduce the number of partitions in a var_map. + (change_partition_var): Assign a specific var to a partition. + (create_ssa_var_map): Initialize a var_map with referenced variables. + (dump_var_map): Debug output for a var_map. + +2003-04-03 Diego Novillo <dnovillo@redhat.com> + + * fold-const.c (fold_relational_hi_lo): Add missing comparison when + folding comparisons to signed_max+1. + +2003-04-02 Jason Merrill <jason@redhat.com> + Diego Novillo <dnovillo@redhat.com> + + * tree-inline.c (initialize_inlined_parameters): Cast argument + types appropriately when emitting initialization assignments. + +2003-04-01 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (PENDING_STMT, SET_PENDING_STMT): New Macros. + (bsi_insert_on_edge): Rename to bsi_commit_first_edge_insert. Add an + empty annotation record to the new basic_block. + (bsi_commit_edge_inserts): New. Commit all pending edge inserts. + (bsi_insert_on_edge): New. Add stmt to edge's pending insert list. + * tree-flow-inline.h (phi_arg_from_edge): Return PHI index for an edge. + (phi_element_for_edge): Return PHI element for an edge. + * tree-flow.h (struct var_ann_d): Add auxiallary field and new + bit 'processed_out_of_ssa'. + * tree-ssa.c (_var_map): Structure for variable parition map. + (struct _elim_graph): Elimination graph for out-of-ssa pass. + (create_var_map): Create a new var_map. + (delete_var_map): Delete a var_map. + (var_from_parition): Return var for a specified partition. + (get_var_partition): Return partition a var belongs to. + (mapped_var_from_ref): Get root var for a var's partition. + (compact_var_map): Re-map the partitions to make the list dense. + (dump_var_parition): Print var_map. + (set_partition_for_var): Associate a real var with a partition. + (set_var_mapping): Associate an SSA version var with a real var. + (create_var_partition): Create a partition for processing. + (create_temp): Create a new temp variable for a partition. + (insert_copy_on_edge): Insert a copy between variables on an edge. + (new_elim_graph): Create a new elimination graph. + (clear_elim_graph): clear an elimination graph. + (delete_elim_graph): Delete an elimination graph. + (eliminate_name, eliminate_build, elim_forward, + elim_unvisited_predecessor, elim_backward, elim_create, + eliminate_phi): Routines to implement Morgans PHI elimination algorithm. + (eliminate_extraneous_phis): Eliminate PHI nodes which will never + generate code. + (rewrite_out_of_ssa): Use partitions and PHI elimination algorithm. + +2003-04-01 Jeff Law <law@redhat.com> + + * tree-cfg.c (make_blocks): Make sure the BIND_EXPR's subgraph + actually ended in a statement before seeing of the statement should + end a basic block. + + * tree-cfg.c (dump_tree_cfg): Avoid crashing when cfun is NULL. + (tree_cfg2dot): Likewise. + * tree-dfa.c (dump_immediate_uses): Likewise. + * tree-pretty-print.c (dump_generic_node): Dump the EH_FILTER_FAILURE + nodes attached to an EH_FILTER_EXPR. + + * tree-dfa.c (get_stmt_operands): Add cases for TRY_FINALLY_EXPR, + TRY_CATCH_EXPR, CATCH_EXPR and EH_FILTER_EXPR. + (get_expr_operands): Add case for EXC_PTR_EXPR. + + * tree-dfa.c (compute_may_aliases): Accept FNDECL as an argument. + Use FNDECL instead of relying on CURRENT_FUNCTION_DECL. + * tree-flow.h (compute_may_aliases): Update prototype. + * tree-ssa.c (rewrite_into_ssa): Corresponding changes. + + * tree-inline.c (expand_calls_inline): Correctly handle EH_FILTER_EXPR. + +2003-03-31 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (STRICT_WARN, STRICT2_WARN): Remove -Wtraditional. + * timevar.def (TV_TREE_CLEANUP_CFG): Define. + * tree-cfg.c (set_parent_stmt): Add documentation. + (replace_stmt): New function. + (merge_tree_blocks): New function. + (remap_stmts): New function. + (linearize_cond_expr): New function. + (linearize_control_structures): New function. + (cleanup_tree_cfg): Call it. + Use new timevar TV_TREE_CLEANUP_CFG. + (remove_bb): Update debugging message. + Make sure that bb->head_tree_p and bb->end_tree_p exist before + resetting their basic blocks. + (remove_stmt): When removing a control flow expression, update + basic block flags. + (cleanup_control_flow): Make sure that the block contains + statements. + (last_stmt): Reformat for readability. + (last_stmt_ptr): Return NULL if the block has no statements. + * tree-flow-inline.h (parent_block): Check that the block is not + empty. + * tree-flow.h (bb_empty_p): Remove. + * tree-inline.c (copy_tree_r): Do not copy empty_stmt_node. + * tree-ssa-dce.c (tree_ssa_dce): Call cleanup_tree_cfg. + * tree.c (body_is_empty): New function. + * tree.h (body_is_empty): Declare. + +2003-03-31 Jeff Law <law@redhat.com> + + * tree-ssa-ccp.c (simulate_block): Add abnormal edges out of a + block to the edge worklist after simulating a block for the + first time. If the block has a single outgoing normal edge, + add that edge to the worklist after simulating the block for + the first time. + +2003-03-31 Frank Ch. Eigler <fche@redhat.com> + + * gcc.c (MFLIB_SPEC): Remove -ld. + (MFWRAP_SPEC): Remove dlopen wrapping. + +2003-03-28 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa.c (rewrite_block): Add new argument 'eq_expr_value'. + Update all users. + If 'eq_expr_value' is given, use it to register a new + value for the variable given on the LHS. + If the block ends in a conditional expression of the form 'X == Y', + propagate 'X = Y' into the THEN_CLAUSE. + (MAY_COPYPROP_P): Define. + (rewrite_stmt): Call it. + (register_new_def): Fix comment. + (get_eq_expr_value): New function. + +2003-03-28 Diego Novillo <dnovillo@redhat.com> + + * basic-block.h (BB_COMPOUND_ENTRY): Remove. Update all users + everywhere. + * tree-cfg.c: Minor fixes to various comments. + * tree-optimize.c (optimize_function_tree): Dump optimized function + after SSA->normal conversion. + +2003-03-26 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c: Implement open64 renaming algorithm. + (subst_phis): New function. + (generate_expr_as_of_bb): Ditto. + (new_rename_1): Ditto. + (process_delayed_rename): Ditto. + (do_proper_save): Use bsi_* functions for insertion, don't remove + old code quite yet, haven't fully tested. + Also add argument that says whether to insert before use or after use. + (defs_y_dom_x): Factor through injuries properly. + (defs_match_p): Ditto. + (phi_opnd_from_res): Attempt to fix, and remove useless argument. + (reset_can_be_avail): Fix broken condition that would cause infinite + loop. + (update_old_new): #if 0 updating of bb heads. + (finalize_1): We occasionally get 5 + a rather than a + 5, so we + need to make sure 5 is a DECL before trying to get a reaching def. + (repair_use_injury): If we couldn't find a reaching def, we don't need + to repair it. + (assign_new_class): Only push to stack2 if it exists (so we can + share this function in both rename implementations). + (create_ephi_node): Add argument that says whether to add ephi + to block or not (we create them sometimes for validation only). + (tree_perform_ssapre): Skip expressions without any uses. + + * tree.h: Add EREF_DELAYED_RENAME. + (struct tree_eref_common): Add delayed_rename bit. + +2003-03-25 Diego Novillo <dnovillo@redhat.com> + + * tree-simple.c: Use tree codes to document grammar for relational + operators &&, || and ^. + +2003-03-25 Diego Novillo <dnovillo@redhat.com> + + * cfg.c (dump_edge_info): Add labels for EDGE_TRUE_VALUE, + EDGE_FALSE_VALUE and EDGE_EXECUTABLE. + * tree-cfg.c (dump_tree_bb): Change formatting. Show all + statements in the block. + * tree-simple.c: Update documentation for GIMPLE conditional + expressions. + +2003-03-24 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (get_expr_operands): If there are no call clobbered + variables, don't create a VDEF for GLOBAL_VAR at clobbering + CALL_EXPRS. + * tree-flow.h (fold_stmt): Declare. + * tree-ssa-ccp.c (fold_stmt): Change to extern declaration. + * tree-ssa.c (rewrite_stmt): Call it. + +2003-03-22 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (gtype-desc.o): Add dependency on $(TREE_FLOW_H). + + * tree-dfa.c (struct alias_set_d): Add field 'num_elements'. + (struct walk_state): Move declaration earlier in the file. + (create_global_var): New local function. + (num_referenced_vars, num_aliased_objects): Change type to + 'size_t'. Update all users. + (aliased_objects, aliased_objects_base, aliased_objects_aliase_set): + Mark for garbage collection. + (num_call_clobbered_vars, call_clobbered_vars): New global + variable. + (get_expr_operands): For CALL_EXPRs, add a VUSE or VDEF reference + for every pointer argument. If the call may clobber, add a VDEF, + otherwise add a VUSE. + If the call may clobber, add VDEF for GLOBAL_VAR. + (dump_variable): Show whether the variable is call clobbered. + (dump_dfa_stats): Show call clobbered variables. + (compute_may_aliases): Minor formatting changes. + (compute_alias_sets): If the function makes clobbering calls, add + GLOBAL_VAR as an alias to every call-clobbered variable. + Remove alias sets that have exactly one element. + (register_alias_set): Set 'num_elements' to zero for every newly + created alias set. + (find_alias_for): Don't make a second call to add_may_alias to make + alias tags alias themselves. It's redundant. + Increment 'num_elements' when adding a new alias to an alias set. + (may_alias_p): Don't handle GLOBAL_VAR. + Check for structure aliasing when either PTR or VAR are a + structure. Don't do it only when both are structures. + (dump_alias_info): Show all aliases of each variable. + (find_vars_r): When processing a CALL_EXPR node, set + walk_state->is_store if the function may clobber and create a + reference to GLOBAL_VAR. + (add_indirect_ref_var): Change type of second argument from 'void *' + to 'struct walk_state *'. Update all users. + (add_referenced_var): Likewise. If a potentially aliased variabe + is not declared 'const', add it to the list of call clobbered + variables. + + * tree-flow.h (struct var_ann_d): Add field 'is_call_clobbered'. + Change type of field 'uid' to size_t. Update all users. + (stmt_ann_d): Add field 'makes_clobbering_call'. + (next_tree_ref_id): Remove unused variable. + (call_clobbered_vars): Declare. + (num_call_clobbered_vars): Declare. + (call_clobbered_var): New inline function. + + * tree-ssa-ccp.c (visit_phi_node): If the LHS of a PHI node is + volatile, mark the PHI node VARYING without checking its arguments. + (visit_assignment): Likewise. + (set_value): Remove. Update all users. + (likely_value): If the statement makes aliased loads or has + volatile operands, consider it VARYING. + (get_default_value): If a variable is volatile, consider it + VARYING. + + * tree-ssa.c (init_tree_ssa): Initialize num_call_clobbered_vars + and call_clobbered_vars. + Do not create GLOBAL_VAR. Set it to NULL_TREE. + Increase initial size for various hash tables. + (delete_tree_ssa): Reset num_call_clobbered_vars and + call_clobbered_vars. + (get_reaching_def): Rename from currdef_for. Update all users. + Always create default definitions for variables that need them. + Callers that use to call currdef_for with the second argument set + to false now call get_value_for. + (htab_statistics): New function. + (dump_tree_ssa): Call it. + (avail_expr_eq): Also compare VUSE operands. + +2003-03-21 Jeff Law <law@redhat.com> + + * tree-dfa.c: Revert vla changes from yesterday. + (find_vla_decls_r): Do not look inside TYPE_DECLs. + +2003-03-20 Jeff Law <law@redhat.com> + + * gimplify.c (simplify_return_expr): Tighten condition for + converting the RHS of a MODIFY_EXPR in a RETURN_EXPR to a + simple_val. Allow returning a RESULT_DECL directly. + * tree-dfa.c (get_expr_operands): A RESULT_DECL can have + interesting operands. + (clobber_vars_r): Handle RESULT_DECLs. + (compute_may_aliases): Initialize and free vla_htab. + (find_vla_decls): Pass vla_htab to walk_tree. + (find_vla_decls_r): Likewise. + * tree.h (SSA_DECL_P): Accept RESULT_DECLs. + +2003-03-19 Jeff Law <law@redhat.com> + + * gimplify.c (simplify_return_expr): Only allow simple values + on the RHS of a MODIFY_EXPR appearing in a RETURN_EXPR. + * tree-cfg.c (make_exit_edges): We no longer need to look for + CALL_EXPRs on the RHS of a MODIFY_EXPR inside RETURN_EXPRs. + +2003-03-18 Andrew Macleod <amacleod@redhat.com> + + * tree-cfg.c (make_blocks): Use append_stmt_to_bb. Check for NULL + tsi_stmt when deciding whether to start a new block. + (add_stmt_to_bb): Don't update the basic block end pointer. + (append_stmt_to_bb): New. Add stmt and update the BB end pointer. + (first_stmt): Use only 1 return. + (last_stmt): Modified to use bsi_last(). + (last_stmt_ptr): Modified to use bsi_last(). + (bsi_last): New. Return an iterator to the last stmt in a block. + (bsi_from_tsi): Fix bug which wouldn't set the context properly when + within a nested BIND_EXPR. + (bsi_update_from_tsi): Insert helper which is more efficient than + bsi_from_tsi(). + (bsi_link_after): link in a new stmt and update the basic block + data structures. + (bsi_insert_after): Insert a new stmt into a block. + (bsi_insert_before): Insert a new stmt into a block. + (bsi_insert_on_edge): Insert a new stmt on an edge. + * tree-flow-inline.h (is_label_stmt): Return true if stmt can be a + target of a control transfer. + * tree-flow.h (is_label_stmt, bsi_last): New prototypes. + +2003-03-12 Jeff Law <law@redhat.com> + + * c-simplify.c (simplify_switch_stmt): Save the type of the original + condition in TREE_TYPE (SWITCH_EXPR (...)). Annotate the SWITCH_EXPR + with file/line information. + * expr.c (expand_expr, case SWITCH_EXPR): Use expand_end_case_type. + * tree.def (SWITCH_EXPR): Document meaning of TREE_TYPE field of + the SWITCH_EXPR. + + * c-simplify.c (simplify_block): Set the current line number to + the line associated with the end of the block. + + * c-decl.c (finish_function): No longer save/restore the + current filename or linenumber around simplification. Instead + save/restore it around inlining. + (c_expand_body_1): Save/restore current filename and linenumber + around expansion of trees into RTL. + * gimplify.c (simplify_function_tree): Make the current file/line + number match the non-gimple code at the end of a function. + + * tree-cfg.c: Include toplev.h. + (remove_bb): Warn about unreachable code. + + * cfgrtl.c (verify_flow_info): Ignore EDGE_EXECUTABLE, it's for + the CCP optimizer only. + + * ssa.c (convert_to_ssa): Use last_basic_block, not n_basic_blocks. + +2003-03-11 Jeff Law <law@redhat.com> + + * builtins.c: Fix minor comment typo. + (expand_builtin_strcmp, expand_builtin_strncmp): Remove. + (expand_builtin_strcat, expand_builtin_strncat): Likewise. + (expand_builtin_strspn, expand_builtin_strcspn): Likewise. + (expand_builtin_strcopy, expand_builtin_strstr): Likewise. + (expand_builtin_strpbrk, expand_builtin_strchr): Likewise. + (expand_builtin_strrchr, expand_builtin_fputs): Likewise. + (simplify_builtin_memcmp, simplify_builtin_strcmp): New functions. + (simplify_builtin_strpbrk, simplify_builtin_strstr): Likewise + (simplify_builtin_strchr, simplify_builtin_strrchr): Likewise + (simplify_builtin_strcpy, simplify_builtin_strncpy): Likewise + (simplify_builtin_strncmp, simplify_builtin_strcat): Likewise + (simplify_builtin_strncat, simplify_builtin_strspn): Likewise + (simplify_builtin_strcspn, simplify_builtin_fputs): Likewise + (expand_builtin_memcmp): Use simplify_builtin_memcmp. + (simplify_builtin): New function + (expand_builtin): Use simpify_builtin to collapse several common + cases together. + * gimplify.c (simplify_call_expr): Accept new argument. All + callers updated. Call simplify_builtin to try and simplify builtin + function calls before we simplify their arguments. + * tree.h (simplify_builtin): Prototype. + +2003-03-11 Jeff Law <law@redhat.com> + + * timevar.def (TV_TREE_SSA_TO_NORMAL): New timevar. + * tree-cfg.c (remove_stmt): Also remove special annotations + on RHS of MODIFY_EXPR statements. + * tree-dfa.c (create_stmt_ann): Update comments. Fix formatting. + (compute_may_aliases): Make sure timevar encloses entire routine. + * tree-ssa.c (rewrite_out_of_ssa): Enclose with a timevar. + (remove_annotations_r): Avoid walking into subtrees of anything + except container nodes. Remove the special annotation on the + RHS of MODIFY_EXPRs. + +2003-03-10 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mx_xfn_indirect_ref): Allow unfolded "& ptr->field" + constructs to pass uninstrumented. Remove TREE_ADDRESSABLE settings. + Keep array accesses to non-ADDRESSABLE objects uninstrumented. Update + __MF_TYPE_* constants for __mf_register calls. + +2003-03-10 Jeff Law <law@redhat.com> + + * c-decl.c (c_expand_body_1): Update comments relating to + re-simplification after mudflap instrumentation. Avoid + unnecessary simplification of the function tree. + * gimplify.c (keep_function_tree_in_gimple_form): New function. + * tree-inline.c: Include tree-iterator.h and tree-simple.h + (struct inline_data): Add new TSI field. + (copy_body_r): Keep tree in gimple form when transforming a + RETURN_EXPR into a MODIFY_EXPR and GOTO_EXPR. + (initialize_inlined_parameters): Use MODIFY_EXPR, not INIT_EXPR + for initialization of inlined parameters. + (expand_call_inline): Save and restore the TSI around the + call to expand_calls_inline. Keep the tree in gimple form + when replacing a CALL_EXPR with a BIND_EXPR for the inlined + body. + (expand_calls_inline): Revamp to provide the current TSI to + expand_call_inline when we're working with gimple form. + * Makefile.in (tree-inline.o): Update dependencies. + * tree.h (keep_function_tree_in_gimple_form): Prototype. + +2003-03-10 Andrew MacLeod <amacleod@redhat.com> + + * Makefile.in (tree.o): Add tree-iterator.h dependancy. + * sbitmap.c (sbitmap_realloc): Grow a sbitmap structure. + * sbitmap.h (sbitmap_realloc): New Prototype. + * tree-cfg.c (remove_bb): Use new format for bsi_remove. + (bsi_remove): Update iterator to refer to the next stmt. + (bsi_prev): Implement previous stmt routine. + (bsi_from_tsi): Create a block iterator from a tree iterator. + * tree-flow-inline.h (bsi_prev): Remove. + (tsi_from_bsi): Create a tree iterator from a block iterator. + * tree-flow.h (bsi_prev,bsi_remove): Update prototypes. + (bsi_from_tsi, tsi_from_bsi, bsi_insert_*): New prototypes. + (bsi_iterator_update): New enum type. + * tree-iterator.h (tree_stmt_anchor, tsi_iterator_update): New type. + (tsi_link_before, tsi_link_after, tsi_delink, tsi_new_stmt_list, + tsi_stmt_list_head): New prototypes. + * tree-ssa-dce.c (remove_dead_stmts): Update removal loop to allow + that remove_dead_stmt update's the iterator. + (remove_dead_stmt): Use a pointer to the iterator since bsi_remove + requires it. + * tree.c (tsi_link_before): New function to link a stmt before an + iterator. + (tsi_link_after): New function links stmt after an iterator. + (tsi_delink): Removes a stmt from a list. + (tsi_new_stmt_list): New function to begin a new stmt list. + (tsi_stmt_list_head): New function to get the first stmt in a list. + +2003-03-07 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (remove_stmt): Don't assume that the statement is in + SSA form. + + * tree-flow.h (dump_tree_ssa_stats): Declare. + (debug_tree_ssa_stats): Declare. + (stmt_ann_d): Add new statement flags 'makes_aliased_loads', + 'makes_aliased_stores', and 'has_volatile_ops'. + * tree-dfa.c (add_stmt_operand): Set new statement flags accordingly. + + * tree-pretty-print.c (dump_generic_node): Various cosmetic changes + to the rendering of some expressions. + + * tree-ssa.c (struct var_value_d): Rename from struct currdef_d. + Rename field 'currdef' to 'value'. Update all users. + (avail_exprs): New local hash table. + (const_and_copies): New local hash table. + (struct ssa_stats_d): Declare. + (ssa_stats): New local variable. + (rewrite_into_ssa): Deallocate avail_exprs and const_and_copies + after renaming. + Call dump_tree_ssa_stats() if -fdump-tree-ssa-stats is given. + (rewrite_block): Document the renaming process. + Add new local stack block_avail_exprs to keep track of expressions + made available in this block and its children. + (rewrite_stmts): Move body inside rewrite_block. + (dump_tree_ssa_stats): New function. + (debug_tree_ssa_stats): New function. + (get_def_blocks): New function. + (insert_phi_nodes_for): Call it. + (rewrite_stmt): Add support for keeping track of copies, constants + and globally redundant expressions. + (rewrite_operand): If a pointer has been copy propagated into + another one, rewrite INDIRECT_REF nodes of the original pointer to + refer to the new one. + (register_new_def): Add new argument 'var' indicating which + variable is this new definition for. Update all users. + (update_indirect_ref_vuses): New function. + (update_pointer_vuses): New function. + (init_tree_ssa): Set variable 'ssa_stats' to zero. + Allocate memory for 'avail_exprs' and 'const_and_copies'. + (currdef_for): Don't mark inline. + Call get_value_for and set_value_for. + (set_currdef_for): Remove. Update all users. + (var_value_hash): Rename from currdef_hash. Update all users. + (var_value_eq): Rename from currdef_eq. Update all users. + (get_value_for): New function. + (set_value_for): New function. + (lookup_avail_expr): New function. + (avail_expr_hash): New function. + (avail_expr_eq): New function. + (get_def_blocks_for): New function. + (var_is_live): New function. + +2003-03-06 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (likely_value): Don't assume CONSTANT if the + statement has virtual uses. + +2003-03-05 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (opf_none, opf_is_def, opf_force_vop, opf_ignore_bp): + New flags to alter the behavior of add_stmt_operand. + (get_expr_operands): Change operand IS_DEF with FLAGS. Update all + users. + When adding a VUSE for pointer dereferences in function arguments, + don't add a superfluous VUSE for the base pointer. + (add_stmt_operand): Remove operands IS_DEF and FORCE_VOP. Add + operand FLAGS. Update all users. + +2003-03-05 Jason Merrill <jason@redhat.com> + + * c-pretty-print.c (do_niy): Only print operands of expressions. + * tree-pretty-print.c: Likewise. + + * c-simplify.c (simplify_decl_stmt): Only simplify DECL_SIZE_UNIT. + * gimplify.c (simplify_array_ref_to_plus): New fn. + (simplify_array_ref): Use it. + (build_addr_expr_with_type): Split out from build_addr_expr. + (simplify_compound_lval): Break out an ARRAY_REF with non-constant + element size. + +2003-03-05 Frank Ch. Eigler <fche@redhat.com> + + * gcc.c (MFWRAP_SPEC): Remove most --wrap entries. + +2003-03-03 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (is_strred_cand): Temporarily disable strength + reduction while working on bootstrapping. + (requires_edge_placement): Reenable for now, until an insertion + infrastructure exists that can handle critical edges. + (count_stmts_in_bb): New function, used for verifying we do + insertions properly. + (update_old_new): Fix up bb heads as well. + (do_proper_save): Handle single statement bb properly. + Handle BB's contained in BIND_EXPRS. + (code_motion): Count number of statements in bb before and after + to make sure we don't screw up boundaries. + (finalize_1): Ditto. + (rename_2): Fix subtle rename bug. + (phi_opnd_from_res): Do this the right way, by cloning the + occurrence and modifying it, as every other PRE implementation + does. + (tree_perform_ssapre): Handle comparisons too (unary exprs + currently disabled till load PRE is reimplemented). + (reset_can_be_avail): Fix can_be_avail test. + +2003-03-01 Diego Novillo <dnovillo@redhat.com> + + * doc/invoke.texi: Fix typo. + +2003-02-28 Aldy Hernandez <aldyh@redhat.com> + Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (OBJS): Add tree-ssa-copyprop.o. + (tree-ssa-copyprop.o): New rule. + (tree-ssa-ccp.o): Add dependency on $(TREE_SIMPLE_H). + + * timevar.def (TV_TREE_COPYPROP): New timevar. + * flags.h (flag_tree_copyprop): Declare. + * toplev.c (flag_tree_copyprop): Define. + (f_options): Add -ftree-copyprop. + * tree.h (tree_dump_index): Add TDI_copyprop. + * tree-dump.c (dump_files): Add entry for -fdump-tree-copyprop. + * doc/invoke.texi: Document -ftree-copyprop and -fdump-tree-copyprop. + + * tree-ssa-copyprop.c: New file. + * tree-flow.h (tree_ssa_copyprop): Declare. + * tree-optimize.c (optimize_function_tree): Call it. + * tree-dfa.c (add_vuse): Make extern. Update all users. + + * tree-ssa.c (mark_def_sites): VUSEs are stored in a varray of trees. + +2003-02-28 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mudflap_enqueue_decl): Ignore extern artificial + variable declarations. + +2003-02-27 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (get_stmt_operands): INIT_EXPR nodes cannot + appear in GIMPLE form. Don't handle them. + (get_expr_operands): Likewise. + (find_vars_r): Likewise. + * tree-ssa-ccp.c (get_rhs): Likewise. + (set_rhs): Likewise. + * tree-ssa-pre.c (tree_perform_ssapre): Likewise. + +2003-02-27 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (ccp_fold): Fold builtins by replacing and + restoring their arguments. + +2003-02-27 Jeff Law <law@redhat.com> + + * tree-dfa.c (find_vars_r): Clear *walk_subtrees appropriately + to avoid useless walking of subtrees. + + * fold-const.c (nondestructive_fold_binary_to_constant): Renamed + from nondestructive_fold_binary. Update comments slightly. + (nondestructive_fold_unary_to_constant): Similarly. + (fold_relational_hi_lo): Corresponding changes. + * tree-ssa-ccp.c (ccp_fold): Corresponding changes. + * tree.h: Corresponding changes. + +2003-02-26 Jeff Law <law@redhat.com> + + * tree-ssa-ccp.c (ccp_fold): Also handle folding of calls to + builtin functions. + + * fold-const.c (nondestructive_fold_binary): Handle truth ops + when both arguments are constant (duh!). Handle CONJ_EXPR. + +2003-02-26 Daniel Berlin <dberlin@dberlin.org> + + * flags.h: Remove flag_ip. + * toplev.c: Ditto. + * tree-alias-ander.c: s/flag_ip/flag_unit_at_a_time/g. + (andersen_cleanup): Set region to null when done. + (andersen_function_call): Check DECL_PTA_TYPEVAR, not + DECL_SAVED_TREE. + * tree-alias-common.c: s/SSA_DECL_P/DECL_P/g. + (get_alias_var_decl): Remove dead code, fix bug in what is a + local alias var. + (find_func_aliases): Use get_alias_var, not create_fun_alias_var. + (create_fun_alias_var): Fix to use DECL_PTA_TYPEVAR. + Use get_alias_var rather than create_alias_var. + (create_fun_alias_var_ptf): Ditto. + (create_alias_vars): Ditto. + * tree-dfa.c (compute_may_aliases): Fix check for + create_alias_vars. + Move deletion of alias vars back to here, from tree-ssa.c + * tree-ssa.c (delete_tree_ssa): Remove delete_alias_vars call. + +2003-02-25 Jeff Law <law@redhat.com> + Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (likely_value): If the statement has no + use operands, then return CONSTANT. + + * fold-const.c (nondestructive_fold_binary): Handle TRUTH_AND_EXPR + and TRUTH_OR_EXPR. Placeholder for TRUTH_XOR_EXPR. + * tree-ssa-ccp.c (ccp_fold): Handle TRUTH_{AND,OR,XOR}_EXPR. + (def_to_undefined): Re-enable VARYING->UNDEFINED state transition + sanity check. + + * tree-ssa-ccp.c (likely_value): Renamed from may_fold_p. Now + returns a latticevalue indicating the likely value for the + the RHS of the statement. + (evaluate_stmt): Update to use likely_value instead of may_fold_p. + Statements with UNDEFINED operands produce an UNDEFINED result. + (set_lattice_value): Reenable VARYING->CONSTANT sanity check. + +2003-02-25 Andrew MacLeod <amacleod@redhat.com> + + * tree-cfg.c (bsi_init): Handle BIND_EXPR nodes inside a basic block. + (bsi_next_in_bb): Likewise. + +2003-02-25 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (parent_array): Remove. Update all users. + (struct cfg_stats_d): Add field 'num_failed_bind_expr_merges'. + (NEXT_BLOCK_LINK): Define. + (build_tree_cfg): Call alloc_aux_for_blocks instead of + create_block_annotations. + (make_blocks): Rewrite to support basic blocks that can span whole + BIND_EXPR bodies and put control statements at the end of blocks. + Add arguments 'next_block_link' and 'bb'. Replace 'parent_block' + with 'parent_stmt'. Update all users. + (make_loop_expr_blocks): Replace argument 'parent_block' with 'entry'. + Add argument 'next_block_link'. Update all users. + Don't create an empty latch block. + (make_cond_expr_blocks): Add argument 'next_block_link'. Update + all users. + (make_switch_expr_blocks): Likewise. + (make_bind_expr_blocks): Replace 'parent_block' with 'parent_stmt'. + Add argument 'next_block_link' and 'entry'. + Don't create a new block for the BIND_EXPR node. Extend the + existing block. + (add_stmt_to_bb): New function. + (create_bb): Remove argument 'parent_block'. Update all users. + (create_block_annotations): Remove. Update all users. + (make_edges): Don't handle BIND_EXPR nodes. + (make_ctrl_stmt_edges): Don't create an extra edge to the body of + the switch. + (make_loop_expr_edges): Only create an edge to the body of the + loop. + (remove_unreachable_block): Add more documentation for the special + case where a control statement entry is unreachable but its body + isn't. + Remove the basic block annotation from the head and end containers + in the block. + (disconnect_unreachable_case_labels): Don't keep the edge that goes + to the BIND_EXPR at the start of the switch body. + (dump_tree_bb): Call is_latch_block_for. + (dump_cfg_stats): Show stats about basic blocks that could not span + beyond the end of a BIND_EXPR body. + (successor_block): Use NEXT_BLOCK_LINK if the block is the last + inside a control structure. + (is_ctrl_stmt): Update documentation. + (stmt_starts_bb_p): Add new argument 'prev_t'. Update all users. + Only labels may start a new basic block. + (stmt_ends_bb_p): Add LOOP_EXPR, TRY_FINALLY_EXPR and + TRY_CATCH_EXPR to the list. + (latch_block): Remove. + (is_latch_block_for): New function. + (set_bb_for_stmt): Reformat some code. + + * tree-flow-inline.h (set_parent_block): Remove. Update all users. + (parent_stmt): New function. + (parent_block): Call it. + + * tree-flow.h (struct stmt_ann_d): Add field 'parent_stmt'. + (struct bb_ann_d): Remove block parent_block. + + * tree-pretty-print.c (dump_generic_node): Don't handle empty latch + nodes. + + * tree-ssa-ccp.c (def_to_undefined): Temporarily disable check for + VARYING->UNDEFINED transitions. + (set_lattice_value): Likewise for VARYING->CONSTANT transitions. + + * tree-ssa-dce.c (mark_necessary): Use parent_stmt() to traverse + all the control statements that contain the current + statement. + (makr_control_parent_necessary): Remove. Update all users. + (stmt_useful_p): Add BIND_EXPR to the list of useful + statements. + (process_worklist): Check that the statement is + associated to a basic block. + (remove_dead_stmt): Don't assume that the block has a + postdominator. + +2002-02-20 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ander.c: Store cached ptsets in the typevar, not + a seperate hash table. + (ptset_map): Removed; + (ptset_map_eq): Ditto. + (ptset_map_hash): Ditto. + (andersen_init): Remove ptset_map. + (andersen_cleanup): Ditto. + (andersen_add_var): Ditto. + (andersen_add_var_asm): Ditto. + (andersen_may_alias): Ditto. + * tree-alias-common.c: Store typevars for DECL nodes in the tree_decl + structure. + (get_alias_var_decl): Use DECL_PTA_TYPEVAR for DECL's. + (create_alias_var): Ditto. + (find_func_aliases): CONST functions don't affect aliasing either. + (ptr_may_alias_var): Don't call get_base_symbol. + Remove decl_function_context, use DECL_CONTEXT instead. + For DECL's, use DECL_PTA_TYPEVAR. + * tree-alias-type.c (struct alias_typevar_aterm): Add ptset member. + (ALIAS_TVAR_PTSET): New macro. + * tree.h (DECL_PTA_TYPEVAR): New macro. + (struct tree_decl): Add typevar member. + +2003-02-20 Jeff Law <law@redhat.com> + + * c-simplify.c (simplify_decl_stmt): Call set_vla_decl on the + temporary holding the size and unit size for a VLA. Minor + formatting fixes. + + * ssa.c: Revert caching of immediate dominators change made on + Jan 28, 2003. + + * tree-dfa.c: Fix comment. + +2003-02-20 Jeff Law <law@redhat.com> + + * tree-cfg.c (remove_bb): Update PHI nodes as edges are removed. + (cleanup_cond_expr_graph): Likewise. + (cleanup_switch_expr_graph): Likewise. + (disconnect_unreachable_case_labels): Likewise. + + * tree-ssa-dce.c (mark_control_parent_necessary): Be much more + selective about what statements in the control parents are marked + as necessary. + + * tree-dfa.c (INDIRECT_REFs and ADDRESSABLE_VARs varrays): Replace + with a single ALIASED_OBJECTs set of varrays. + (dump_dfa_stats): Corresponding changes. + (compute_may_aliases, dump_alias_info): Likewise. + (compute_alias_sets): Likesise. Update comments. Register + alias sets for all potentially aliased objects which are stored. + Check each potentially aliased object with the registered alias + sets. + (register_alias_set): If DEREF aliases a single registered _DECL, + then replace the _DECL's entry with DEREF. + (find_alias_for): Update comments. Do not stop the search when + an alias is found. There may be multiple entries with conflicting + alias sets. + (struct walk_state): New structure for statement walker callbacks. + (find_vars_r): Add logic to track loads and stores of potentially + aliased objects separately. Various changes related to + using a single set of varrays for all aliased objects. + (add_referenced_var): Record in the var's annotation if the + var is read or written. Various changes related to using a + single set of varrays for all the aliased objects. + (add_stmt_operand): Only set may_point_to_global_mem for INDIRECT_REFs. + * tree-flow.h (struct var_ann_d): Add new fields indicating if + the var is loaded or stored. Explicitly note unused bitfield + entries. + +2003-02-19 Jeff Law <law@redhat.com> + + * fold-const.c (fold_negate_const): New function. Broken out of + the generic fold code. + (fold_abs_const, fold_relational_const): Likewise. + (fold_relational_hi_lo): Likewise. + (nondestructive_fold_unary, nondestructive_fold_binary): Likewise. + (fold): Use fold_negate_const, fold_abs_const, fold_relational_const, + and fold_relational_hi_lo. + * tree.h (nondestructive_fold_unary): Declare. + (nondestructive_fold_binary): Declare. + * tree-ssa-ccp.c (ccp_fold): New function. + (add_control_edge): Fix trivial formatting bug. + (evaluate_stmt): Rework to use ccp_fold instead of copying + statements. + +2003-02-18 Jeff Law <law@redhat.com> + + * tree-ssa-ccp.c (visit_assignment): For simple copies, copy the + lattice values. + (defs_to_undefined): Add missing abort. + (replace_uses_in): Do not do a replacement if it would create + non GIMPLE trees. + +2002-02-14 Jeff Law <law@redhat.com> + + * tree-ssa-ccp.c (def_to_undefined): Improve sanity checking code + so that it can detect invalid VARYING->UNDEFINED transitions. + (set_lattice_value): Improve sanity checking code so that it + does not trip on valid VARYING->CONSTANT transitions. + + * tree-flow.h (struct stmt_ann_d): Add new field in_ccp_worklist. + * tree-ssa-ccp.c (simulate_stmt): Renamed from simulate_def_use_edges. + (add_var_to_ssa_edges_worklist): New function. Only add statements + to the ssa_edges worklist if they are not already on the worklist. + (def_to_undefined, def_to_varying, set_lattice_value) + (tree_ssa_ccp): Only reevaluate the statement if in_ccp_worklist + is set for the element popped off the ssa_edges worklist. + (simulate_statement): Simplify now that ssa_edges is a worklist + of statements to reevaluate rather than a worklist of defs + that need their immediate uses reevaluated. + (visit_stmt): Clear in_ccp_worklist. + + * tree-ssa-ccp.c (def_to_undefined): Directly store the new + lattice values rather than call set_value. + (def_to_varying): Likewise. + (set_lattice_value): Likewise. + + * tree-ssa-ccp.c (def_to_undefined): Add some state transition + sanity checking. Avoid calling set_value if nothing changed. + (def_to_varying): Avoid calling set_value if nothing changed. + (set_lattice_value): Add some state transition sanity checking + for transitions into the CONSTANT state. If the object's + "constant" value has changed to a new constant value, then the + object has a VARYING value. + + * tree-ssa-ccp.c (tree_ssa_ccp): Work through the entire + ssa_edges worklist each iteration through the main loop. + +2002-02-13 Jeff Law <law@redhat.com> + + * tree-ssa-ccp.c: Fix comment formatting glitches. + + * tree-ssa-ccp.c (may_fold_p): New function. Returns nonzero if + the given statement may fold after replacement of operands with + constants. + (evaluate_stmt): Only create a copy of the statement if there is + a reasonable chance the statement will fold. + +2002-02-13 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (OBJS): Add tree-ssa-pre.o. + +2003-02-13 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (create_stmt_ann): Do stmt part of common annotation. + * tree-flow-inline.h (tree_stmt): Return statement tree is part of. + * tree-flow.h (struct bb_ann_d): Add ephi_nodes. + * tree-optimize.c (optimize_tree): Activate SSAPRE again. + * tree-pretty-print.c (debug_generic_expr): New function. + (debug_generic_stmt): Ditto. + (dump_generic_node): Pretty print EUSE's, EREF's, and EPHI's. + + * tree-ssa-pre.c: Rewrite almost entirely. Now performs more + strength reduction, EPHI minimization, and keeps SSA up to date. + * tree.c (tree_size): Handle EUSE, EPHI, EREF nodes. + (tree_node_structure): Ditto. + (ephi_node_elt_check_failed): New function. + * tree.def: Add EUSE_NODE, ELEFT_NODE, EKILL_NODE, EPHI_NODE, + EEXIT_NODE. + * tree.h (EREF_NODE_CHECK): New. + (EPHI_NODE_ELT_CHECK): New. + (struct tree_eref_common): New. + (struct tree_euse_node): New. + (struct tree_ephi_node): New. + (union tree_node): Add euse, eref, ephi members. + (enum tree_node_structure): Add TS_EPHI_NODE, TS_EUSE_NODE, + TS_EREF_NODE. + +2003-02-13 Daniel Berlin <dberlin@dberlin.org> + Andreas Jaeger <aj@suse.de> + + * tree-flow.h: Add some garbage collector marks. + +2003-02-12 Jeff Law <law@redhat.com> + + * Makefile.in (ssa.o): Depends on $(TREE_H) and tree-flow.h + * ssa.c: Include tree.h and tree-flow.h. + (compute_dominance_frontiers_1): Use the sparse bitmap + of dominator children from the basic block's annotation + if it's available. Otherwise build the sparse bitmap + using the result of get_dominated_by. + * tree-ssa.c (rewrite_into_ssa): Reorder things slightly so + that we can use the cached dominator children computed + by mark_def_sites in compute_dominance_frontiers. + +2003-02-12 Andreas Jaeger <aj@suse.de> + + * tree-dfa.c (dump_alias_info): Cast variable of size_t properly. + +2003-02-12 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (find_may_aliases_for): Remove + (compute_may_aliases): Always call compute_alias_sets. + +2003-02-10 Jeff Law <law@redhat.com> + + * ssa.c (compute_dominance_frontiers_1): Use a sparse bitmap + for the frontiers. + (compute_dominance_frontiers): Corresponding changes. + (convert_to_ssa): Similarly. Convert the sparse bitmap to + a simple bitmap to avoid lots of collateral damage. + * ssa.h (compute_dominance_frontiers): Update prototype. + * tree-ssa.c (added, in_work): Kill, no longer needed. + (struct def_blocks_d): Add new bitmap (livein_blocks). + (rewrite_into_ssa): Make dominance frontiers be a sparse + bitmap instead of a simple bitmap. Rename the "nonlocals" + simple bitmap to "globals". Pass it into mark_def_sites. + (compute_global_livein): New function. + (mark_def_sites): Also keep track of variables which are + used before they are set. Allow caller to allocate and + pass in a simple bitmap for global variables. Process + items defined in the statement last. + (set_def_block): Also allocate bitmap for globals. + (set_livein_block): New function. + (def_blocks_free): Free def_blocks correctly. Also free + livein_blocks. + (debug_def_blocks_r): Also dump the livein_blocks. + (insert_phi_nodes): Simplify now that we don't need the + added and in_work varrays. Accept DFS as a sparse bitmap + instead of a simple bitmap. + (insert_phi_nodes_for): Rework significantly. Pre-compute all + the insertion points for semi-pruned form. While computing those + insertion points keep track of how many phi vector entries + would be needed at those insertion points. When the number of + entries gets large (32), compute global life information and + use that to further pruned the number of PHI insertion points + necessary. + +2003-02-09 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_vars_r): Assume that the RHS of an INDIRECT_REF, + that is also an SSA variable, is a VAR_DECL. + (get_virtual_var): Handle INDIRECT_REF nodes that are not valid SSA + variables. + + * tree-ssa-dce.c (stmt_useful_p): Revert kludge in previous commit. + VA_ARG_EXPR nodes are not inherently live. + + * tree-ssa.c (mark_def_sites): Don't process the LHS of assignments + twice. + The operand of a virtual definition constitutes a use of the + variable which should be considered a non-local if it had not been + killed inside the block. + + * tree.h (SSA_VAR_P): Only return true for INDIRECT_REFs if their + operand is a _DECL node. + +2003-02-09 Diego Novillo <dnovillo@redhat.com> + + * config/rs6000/t-rs6000 (simplify-rtx.o): Compile with -Wno-error. + +2003-02-08 Diego Novillo <dnovillo@redhat.com> + + * toplev.c (parse_options_and_default_flags): Enable SSA DCE by + default. + + * tree-dfa.c (get_expr_operands): Recurse into LHS of an ARRAY_REF + when it's not a regular variable. Always recurse into the RHS. + (add_stmt_operand): Set may_point_to_global_mem for pointers that + are assigned expressions that may reference global memory. Also + set its dereference variable to be an alias of global memory. + (dump_variable): Show may_point_to_global_mem flag. + (compute_alias_sets): Also dump all referenced variables when + dumping alias information. + (add_may_alias): Check for global memory aliasing. + (may_access_global_mem_p): Rename from may_access_global_mem. + Return true if the expression is a variable that may point to or + alias global memory. + (add_referenced_var): Pointer arguments and global pointers may + point to global memory. + (set_may_alias_global_mem): Move ... + * tree-flow-inline.h (set_may_alias_global_mem): ... here. + (set_may_point_to_global_mem): New function. + (may_point_to_global_mem_p): New function. + + * tree-ssa-dce.c (stmt_useful_p): VA_ARG_EXPRs are inherently live. + * tree-ssa.c (rewrite_into_ssa): Don't call dump_referenced_vars. + +2003-02-06 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (struct alias_tags, alias_tags, num_alias_tags): + Remove. Update all users. + (struct alias_set_d): New. + (alias_sets): New file local variable. + (compute_alias_sets): New function. + (compute_may_aliases): Call it when not doing points-to analysis. + (register_alias_set): New function. + (find_alias_for): New function. + (may_alias_p): Declare static. + Don't assume that VAR may not be aliased if it's a non-addressable + _DECL. + If VAR and PTR are aggregate types, check if they can have a field + that points to the other one. + (find_may_aliases_for): Move handling of global memory aliasing ... + (add_may_alias): ... here. + Also accept the base symbols for the variable and its alias. + (register_new_alias): Remove. Update all users. + (find_alias_tag): Remove. Update all users. + (find_vars_r): Update VAR after re-writing *TP when sharing + INDIRECT_REF nodes. + * tree-flow.h (may_alias_p): Remove declaration. + + * tree-ssa.c (rewrite_into_ssa): Include referenced variables in + default debug dumps. + + Support for VLAs. + + * tree-dfa.c (find_vla_decls): New function. + (compute_may_aliases): Call it. + (find_vla_decls_r): New function. + (dump_variable): Show whether the variable is used in a VLA + declaration. + * tree-flow-inline.h (is_vla_decl): New function. + (set_vla_decl): New function. + * tree-flow.h (struct var_ann_d): Add bitfield 'is_vla_decl'. + * tree-ssa-dce.c (need_to_preserve_store): Return true if SYM is + used inside a VLA declaration. + +2003-02-05 Andrew MacLeod <amacleod@redhat.com> + + * Makefile.in : Include new file tree-iterator.h in tree-simple.h + * gimplify.c (simplify_cleanup_point_expr): Use tsi_ rather than gsi_. + * tree-cfg.c (make_blocks, remove_bb): Use tsi_ not gsi_ routines. + (bsi_remove): Renamed from gsi_remove, use bsi_ routines. + (successor_block, first_exec_stmt): Use tsi_ not gsi_ routines. + (first_stmt, last_stmt, last_stmt_ptr): Use bsi_ not gsi_ routines. + (bsi_init): Split out from bsi_start. + (bsi_start): Renamed from gsi_start_bb, use bsi_ routines. + (bsi_next_in_bb): Moved from tree-flow-inline.h and renamed from + gsi_step_in_bb. Also verify BB of new stmt. + * tree-dfa.c (compute_immediate_uses, dump_immediate_uses, + collect_dfa_stats, compute_may_aliases): Use block_stmt_iterator. + * tree-flow-inline.h (gsi_step_in_bb): Moved to tree-cfg.c + (bsi_end_p): Renamed from gsi_end_bb_p. + (bsi_next): renamed from gsi_step_bb + (bsi_prev): New function. + (bsi_stmt_ptr): Block version of gsi_stmt_ptr. + (bsi_stmt): Block version of gsi_stmt. + (bsi_container): Block version of gsi_container. + * tree-flow.h (block_stmt_iterator): New iterator type. + * tree-iterator.h: New include file for tree_iterator. + * tree-simple.h : Include tree-iterator.h + (gimple_stmt_iterator, gsi_start, gsi_end_p, gsi_stmt_ptr, + gsi_stmt, gsi_container): Move to tree-iterator.h and rename to tsi_. + (gsi_step): Move to tree-iterator.h and renamed to tsi_next. + * tree-ssa-ccp.c (simulate_block, substitute_and_fold): Use block + iterators instead of gimple_stmt_iterator. + * tree-ssa-dce.c (mark_control_parent_necessary, find_useful_stmts, + remove_dead_stmts, remove_dead_stmt): Use block_stmt_iterator. + * tree-ssa.c (mark_def_sites, rewrite_out_of_ssa, rewrite_stmts): Use + block_stmt_iterator. + +2003-02-04 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.c (get_alias_var_decl): If it's a global var, + make sure it doesn't get added to local_alias_vars. + (get_name): Return the right name for FUNCTION_DECL's. + +2003-02-04 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_stmt_operand): Do not add a VUSE for a pointer + when clobbering its associated INDIRECT_REF variable. + +2003-02-04 Diego Novillo <dnovillo@redhat.com> + + * config/rs6000/t-rs6000 (jump.o, regmove.o, c-typeck.o, cfgrtl.o, + combine.o, fold-const.o, ifcvt.o, reload1.o, rtlanal.o, + cp/decl2.o, cp/pt.o, f/where.o, java/expr.o, objc/objc-act.o, + rs6000.o, insn-emit.o): Compile with -Wno-error. + +2003-02-03 Diego Novillo <dnovillo@redhat.com> + Jeff Law <law@redhat.com> + + * tree-cfg.c (make_blocks): Don't always start a new block with + COND_EXPR and SWITCH_EXPR statements. + Call stmt_ends_bb_p to determine if the current statement should be + the last in the block. + (make_cond_expr_blocks): Second argument is now the entry block + to the conditional. + (make_switch_expr_blocks): Second argument is now the entry block + to the switch. + (make_edges, make_ctrl_stmt_edges, make_loop_expr_edges, + cleanup_control_flow, cleanup_cond_expr_graph, + cleanup_switch_expr_graph, disconnect_unreachable_case_labels, + find_taken_edge, successor_block, latch_block, is_latch_block, + switch_parent): Work with the last statement of the block, not the + first. + (is_ctrl_altering_stmt): Pre-compute the code of the statement. + (stmt_starts_bb_p): Declare file local. + Don't call is_ctrl_stmt. Check if T is a LOOP_EXPR instead. + (stmt_ends_bb_p): New function. + + * tree-flow.h (stmt_starts_bb_p): Remove declaration. + +2003-02-03 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_vars_r): Share INDIRECT_REF nodes whose operand + is a VAR_DECL. + (add_referenced_var): Add additional argument 'sym'. Update all users. + Don't call get_base_symbol. + (add_indirect_ref_var): Rename argument 'var' to 'ptr'. + (htab_hash_var): Remove. Update all users to use htab_hash_pointer. + (htab_var_eq): Remove. Update all users to use htab_eq_pointer. + + * tree-flow-inline.h (var_ann): Don't retrieve the annotation of + the base pointer for INDIRECT_REF variables. + (is_aliased): Remove. Update all users. + (is_dereferenced): Remove. Update all users. + (same_var_p): Remove. Update all users to use pointer equality. + + * tree-simple.c (get_base_symbol): Convert tail recursion into + iteration. + + * tree-ssa.c (rewrite_out_of_ssa): Add FIXME note about overlapping + live ranges for different versions of the same variable. + +2003-02-03 Jeff Law <law@redhat.com> + + * tree-dfa.c (add_referenced_var): Annotate each item in the + REFERENCED_VARS varray with a unique id. + * tree-flow.h (struct var_ann_d): Add new uid field. + * tree-ssa.c (mark_def_sites): Compute the set of variables + live across basic blocks and return them in an sbitmap. + (insert_phi_nodes): Use the set of nonlocal variables computed + by mark_def_sites to reduce the number of PHI nodes inserted. + (rewrite_into_ssa): Updated to deal with changes in + insert_phi_nodes and mark_def_sites. Free the sbitmap returned + by mark_def_sites. + +2003-02-03 Diego Novillo <dnovillo@redhat.com> + + * c-common.h (GOTO_DESTINATION): Remove. Fix botched + merge. + +2003-02-03 Diego Novillo <dnovillo@redhat.com> + + Fix warnings to allow bootstrapping with -Werror. + + * Makefile.in (c-semantics.o-warn): Add -Wno-error. + (emit-rtl.o-warn): Likewise. + (profile.o-warn): Likewise. + (tree.o-warn): Likewise. + (OBJS): Remove simple-break-elim.o and simple-goto-elim.o. + * c-pretty-print.c (print_function_decl): Remove unused function. + * bitmap.c (bitmap_last_set_bit): Initialize variable 'word'. + * c-typeck.c (build_binary_op): Initialize variable 'type'. + * combine.c (combine_simplify_rtx): Initialize variable 'reversed'. + (make_compound_operation): Initialize variable 'i'. + * dwarf2out.c (dwarf2out_finish): Initialize variable 'context'. + * expr.c (store_constructor): Initialize variables 'lo', 'hi', + 'startb' and 'endb'. + (expand_expr): Initialize variable 'op0'. + * fold-const.c (fold): Initialize variable 'tem'. + * profile.c (branch_prob): Initialize variable 'prev_file_name'. + * reload.c (find_equiv_reg): Initialize variables 'valtry and + 'valueno'. + * rtlanal.c (get_jump_table_offset): Initialize variable 'set'. + * ssa-ccp.c (ssa_const_prop): Fix sign mismatch warning. + * varasm.c (output_constant_def): Initialize variable 'defstr'. + * gimplify.c (simplify_expr): Initialize variables + 'saved_input_filename' and 'saved_lineno'. + (simplify_compound_lval): Initialize variable 'code'. + * tree-alias-ander.c (pta_bottom): De-ansify. + (andersen_cleanup): Remove unused variables. + (andersen_heap_assign): Mark argument lhs ATTRIBUTE_UNUSED. + (pta_bottom): Remove unused function. + (pta_get_ptsize): Remove unused function. + +2003-02-02 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (get_expr_operands): Add a VUSE for the dereference of + every pointer passed in a function call. + Move code to add an operand for the base pointer of an + INDIRECT_REF ... + (add_stmt_operand): ... here. + Add a VUSE for the base pointer of every INDIRECT_REF variable. + (find_may_aliases_for): Fix starting index for the loop that scans + INDIRECT_REFs for aliasing. + Factor code that marks two variables aliased into + register_new_alias. + (register_new_alias): New function. + (may_alias_p): Handle aliasing of structure fields. + (add_may_alias): Fix documentation. + (find_vars_r): Factor code that adds a new referenced variable into + add_referenced_var. + (add_referenced_var): New function. + (add_indirect_ref_var): New function. + (get_virtual_var): Handle variables wrapped in SSA_NAMEs. + (set_may_alias_global_mem): Move from ... + * tree-flow-inline.h: ... here. + + * tree-ssa-dce.c (need_to_preserve_store): CALL_EXPRs are + implicitly live. VA_ARG_EXPRs are not. + (stmt_useful_p): + + * tree.h (SSA_NAME_VAR): Rename from SSA_NAME_DECL. Update all + users. + (struct tree_ssa_name): Rename field 'decl' to 'var'. Update all + users. + (SSA_DECL_P): Accept only VAR_DECLs and PARM_DECLs possibly wrapped + inside an SSA_NAME node. + (SSA_VAR_P): Also accept SSA_NAME nodes. + +2003-02-01 Daniel Berlin <dberlin@dberlin.org> + + * Makefile.in (tree-ssa-pre2.o): Remove accidental addition. + +2003-01-31 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (find_taken_edge_cond_expr): New function. + (find_taken_edge_switch_expr): New function. + (value_matches_some_label): New function. + (find_taken_edge): Re-structure to use the three new functions. + +2003-01-30 Jason Merrill <jason@redhat.com> + + * gimplify.c (simplify_function_tree): Set TREE_SIDE_EFFECTS on + the BIND_EXPR wrapper. + +2003-01-30 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (call_may_clobber): New function. + (get_expr_operands): Call it. + (find_vars_r): Call it. + +2003-01-30 Jeff Law <law@redhat.com> + + * tree-dfa.c (struct alias_tags): New. Collector for key information + regarding alias tags. + (indirect_refs_base, indirect_refs_alias_set): New varrays. + (addressable_vars_base, addressable_vars_alias_set): Likewise. + (compute_may_aliases): Initialize and finalize the new varrays. + Update allocation of alias tags information. + (find_may_aliases_for): Extract base symbols and alias set + information for V1 and V2 from the virtual arrays and store + them into local variables. Pass them as necessary to + may_alias_p, may_access_global_mem, find_alias_tag. Add base + symbol and alias set when creating a new alias tag. + (find_vars_r): Fill in new varrays as needed. + (may_alias_p): Add new arguments for base and alias set of the + two origianl incoming arguments. No longer call get_base_symbol + or get_alias_set. + (find_alias_tag, may_access_global_mem): Similarly. + (add_stmt_operand): Update to pass additional argument to + may_access_global_mem. + (dump_alias_info): Update to deal with new alias tag structure. + * tree-flow.h (may_alias_p): Update prototype with new arguments. + * tree-ssa-pre.c (process_left_occs_and_kills): Update to pass + new arguments to may_alias_p. + +2003-01-30 Daniel Berlin <dberlin@dberlin.org> + + Remove all traces of steensgaard's algorithm. + * tree-alias-steen.c: Removed. + * tree-alias-steen.h: Ditto. + * tree-alias-ecr.c: Ditto. + * tree-alias-ecr.h: Ditto. + * disjoint-set.c: Ditto. + * disjoint-set.h: Ditto. + * Makefile.in: Remove removed files. + * c-config-lang.in: Ditto. + * gengtype.c: Ditto. + * tree-alias-common.c: Don't use steen_alias_ops anymore. + * toplev.c: Remove help text and steen option. + * tree-alias-common.h: Remove PTA_STEEN. + * tree-alias-type.c: Remove all steensgaard related types and + functions. + * tree-alias-type.h: Ditto. + +2003-01-30 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (struct cfg_stats_d): New. + (cfg_stats): New file local. + (build_tree_cfg): Start TV_TREE_CFG timer before allocating memory. + Initialize cfg_stats. + (make_blocks): Count coalesced label blocks. + (dump_tree_cfg): Call dump_cfg_stats if TDF_STATS is enabled. + (dump_cfg_stats): New. + (debug_cfg_stats): New. + + * tree-dfa.c (SCALE, LABEL, PERCENT): Move ... + * tree-flow.h: ... here + +2003-01-29 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (make_blocks): Do not start a new block if the + previous statement and the current statement are labels of the same + kind. + +2003-01-29 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (parent_array): Make file local. + (label_to_block_map): New file local variable. + (build_tree_cfg): Initialize label_to_block_map. + (make_edges): Don't pre-scan all the blocks looking for blocks with + labels. + (make_exit_edges): Remove argument label_to_block_map. Update all + callers. + (make_goto_expr_edges): Likewise. + (dump_tree_bb): Check that the block has a valid annotation. + (set_bb_for_stmt): If the statement is a label, add the label to + the label_to_block_map. + + * tree-pretty-print.c (dump_vops): Check that the block has a valid + annotation. + +2003-01-29 Jeff Law <law@redhat.com> + + * tree-dfa.c (find_may_aliases_for): Just accept the index of + the current indirect_ref. Caller updated. + (num_indirect_refs, num_addressable_vars): New variables. + (indirect_refs, addressable_vars): New varrays. + (dump_dfa_status): Dump info on the indirect refs and + addressable vars. + (dump_alias_info): Similarly. + (compute_may_aliases): Initialize and finalize the new virtual + arrays and hash tables for indirect refs and addressable vars. + Include setup/teardown in the cost for alias analysis. + (find_may_aliases_for): Split main loop into two. The first + walks over the indirect refs and takes advantage of the + symmetric properties of the aliasing relationship to avoid + useless work. The second loop iterates over the addressable + variables. + (find_vars_r): Rework to build all three arrays we need. + +2003-01-29 Andreas Jaeger <aj@suse.de> + + * tree-alias-common.c (find_func_aliases): Remove unused variable. + (display_points_to_set_helper): #if 0 function to avoid warning + about unused function. + + * tree-alias-ecr.c (ECR_new): Remove ISO C style function + definition. + * disjoint-set.c (disjoint_set_new): Likewise. + +2003-01-29 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mx_xfn_indirect_ref): Use a stack of flags for + tracking pointer dereference reads vs writes. + (mf_build_check_statement_for): Pass access-type value to __mf_check. + * c-mudflap.c (mflang_register_call): Adapt to mf-runtime.h API change. + +2003-01-29 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (ssa.o): Add dependency on $(TIMEVAR_H). + * timevar.def (TV_DOM_FRONTIERS): Define. + * ssa.c (compute_dominance_frontiers): Use. + +2003-01-29 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-dce.c (remove_dead_stmt): Fix uninitialized use + warning. + +2003-01-28 Diego Novillo <dnovillo@redhat.com> + + * timevar.def (TV_TREE_SSA_REWRITE_BLOCKS): Adjust legend. + * tree-ssa.c (rewrite_into_ssa): Use TV_TREE_SSA_REWRITE_BLOCKS. + (mark_def_sites): Add comment. + +2003-01-28 Jeff Law <law@redhat.com> + + * ssa.c (compute_dominance_frontiers_1): Use get_dominated_by + to avoid useless walks over all the basic blocks. Use cache + of immediate dominators to avoid silly calls to get_immediate_dominator. + Do not clear elements of the frontiers bitmap. + (compute_dominance_frontiers): Compute cache of immediate + dominators and pass it to compute_dominance_frontiers_1. Clear + the entire vector of frontiers bitmaps. + + * timevar.def (TV_TREE_SSA_REWRITE_BLOCKS): Renamed from + TV_TREE_BUILD_SSA. + (TV_TREE_SSA_OTHER): New timevar. + * tree-ssa.c (rewrite_into_ssa): Updated. Use new TV_TREE_SSA_OTHER + timevar. + + * tree.h (LABEL_DECL_INDEX): Define for use by CFG builder. + * tree-cfg.c (make_exit_edges): Accept and pass though label to + block mapping array. + (make_goto_expr_edges): For simple gotos, lookup the destination + in the label to block mapping array. Zap old slow code to + handle simple gotos. + (make_edges): Build the label to block mapping array. + + * tree.h (PHI_NODE_ELT_CHECK): Provide version when ENABLE_CHECKING + is not defined. + +2003-01-28 Diego Novillo <dnovillo@redhat.com> + + * tree-flow-inline.h (parent_block, set_parent_block, phi_nodes): + Assume that blocks always have valid annotations. + (add_dom_child): New function. + (dominator_children): New function. + + * tree-flow.h (struct bb_ann_d): Add field 'dom_children'. + + * tree-ssa.c (mark_def_sites): Add parameter 'idom'. + Add each block BB to the set of dominator children of BB's + immediate dominator. + (rewrite_block): Remove 'idom' parameter. + Recurse into blocks set in the dominator children bitmap. + +2003-01-28 Diego Novillo <dnovillo@redhat.com> + + * flags.h (flag_disable_tree_ssa): New flag. + * c-decl.c (c_expand_body): Use it. + * toplev.c: Declare it. + (f_options): Add help text for -fdisable-tree-ssa. + * doc/invoke.texi: Add documentation for -fdisable-tree-ssa. + +2003-01-28 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (TREE_FLOW_H): Add dependency on $(HASHTAB_H) + (OBJS): Temporarily remove tree-ssa-pre.o. + (tree-ssa.o, c-decl.o): Add dependency on $(TREE_DUMP_H). + + * c-decl.c: Include tree-dump.h + + * c-pretty-print.c (dump_c_node): Fix rendering of GOTO_STMTs to + computed locations. + (op_prio): Don't abort on unknown operators. + + * c-simplify.c (mostly_copy_tree_r): Don't copy statement + annotations. + + * gimplify.c (simplify_addr_expr): Mark the RHS of the simplified + ADDR_EXPR addressable. + (mostly_copy_tree_r): Don't copy statement annotations. + + * old-tree-inline.c (walk_tree): Handle SSA_NAME nodes. + + * timevar.def (TV_TREE_RDEFS): Remove. + (TV_TREE_BUILD_SSA): Define. + (TV_TREE_DFA): Define. + + * tree-cfg.c: Update copyright notices. + Remove doxygen markers everywhere. + (remove_unreachable_block): New local function + (remove_unreachable_blocks): Call it. + (remove_bb): Rename from remove_tree_bb. Update all callers. + (validate_loops): Remove unused function. + (block_invalidates_loop): Remove unused function. + (remove_stmt): Invalidate the defining statement of all the + definitions made by the statement. + Remove the annotation before replacing the statement with + empty_stmt_node. + + * tree-dfa.c: Update copyright notices. + Remove doxygen markers everywhere. + (struct clobber_data_d): Remove existing fields. Add fields 'stmt' + and 'prev_vops'. Update all users. + (alias_tags): Rename from alias_leaders. + (num_alias_tags): Rename from num_alias_leaders. + (struct dfa_stats_d): Declare. + (struct dfa_counts_d): Remove. Update all users. + (TRM_*): Remove. Update all users. + (find_tree_refs): Remove. Update all users. + (get_stmt_operands): Rename from find_refs_in_stmt. Update all users. + (get_expr_operands): Rename from find_refs_in_expr. Update all users. + (add_stmt_operand): New function. + (set_def): New function. + (add_use): New function. + (add_vdef): New function. + (add_vuse): New function. + (create_phi_node): New function. + (copy_stmt): New function. + (compute_immediate_uses): New function. + (compute_immediate_uses_for): New function. + (compute_reached_uses): New function. + (compute_reaching_defs): New function. + (add_immediate_use): New function. + (create_var_ann): New function. + (create_stmt_ann): New function. + (dump_immediate_uses): New function. + (debug_immediate_uses): New function. + (dump_immediate_uses_for): New function. + (debug_immediate_uses_for): New function. + (create_ref_list, empty_ref_list, add_ref_to_list_begin, + add_ref_to_list_end, add_list_to_list_begin, add_list_to_list_end, + find_list_node, rli_start, rli_start_last, rli_start_at, + rli_delete, add_ref_to_list_after, tree_ref_size, create_ref, + add_ephi_arg, add_referenced_var, replace_ref_with, + try_replace_ref_with, replace_ref_r, replace_ref_stmt_with, + remove_ref, remove_def, reset_def_def_links, replace_phi_arg_with, + create_tree_ann, function_may_recurse_p, dump_ref, debug_ref, + dump_ref_list, dump_ref_array, debug_ref_list, debug_ref_array, + dump_phi_args, dump_if_different, count_tree_refs, ref_type_name, + ref_defines, is_killing_def, tree_ref_structure, output_ref): + Remove. Update all users. + (dump_referenced_vars): Remove parameter 'details'. Update all + users. + (dump_variable): Don't abort if the variable is nil. Display all + the aliases for the variable. + (dump_dfa_stats): Handle new counters. + (collect_dfa_stats): Likewise. + (collect_dfa_stats_r): Likewise. + (find_vars_r): New function. + (compute_may_aliases): Call it via walk_tree before computing aliases. + Only use alias tags if -ftree-points-to is not given. + Call add_may_alias. + (find_may_aliases_for): Only use alias tags if -ftree-points-to is + not given. + (add_may_alias): New function. + (find_alias_tag): Rename from find_alias_leader. + (dump_alias_info): New function. + (debug_alias_info): New function. + (htab_hash_var): New function. + (htab_var_eq): New function. + (get_virtual_var): New function. + + * tree-dump.c (struct dump_option_value_info): Rename -block to + -blocks. Add new option -vops. + (dump_function): Don't display which pass enabled the dump. + + * tree-flow-inline.h: Update copyright notices. + (var_ann): New function. + (stmt_ann): New function. + (ann_type): New function. + (bb_ann): Rename from bb_annotation. + (may_aliases): New function. + (set_may_alias_global_mem): New function. + (may_alias_global_mem_p): New function. + (set_indirect_ref): New function. + (indirect_ref): New function. + (is_dereferenced): New function. + (modify_stmt): New function. + (unmodify_stmt): New function. + (stmt_modified_p): New function. + (def_op): New function. + (use_ops): New function. + (vdef_ops): New function. + (vuse_ops): New function. + (immediate_uses): New function. + (reaching_defs): New function. + (phi_nodes): New function. + (same_var_p): New function. + (gsi_step_in_bb): Re-implement. Check if the iterator stepped out + of the block by calling bb_for_stmt. + (gsi_end_bb_p): Rename from gsi_end_bb. Update all users. + Call gsi_stmt to determine if the iterator has reached the end of + the block. + (ref_id, ref_type, ref_bb, ref_stmt, ref_var, imm_uses, + reached_uses, imm_reaching_def, set_imm_reaching_def, + set_phi_arg_def, phi_arg_def, set_phi_arg_edge, phi_arg_edge, + reaching_defs, phi_args, num_phi_args, phi_arg, set_phi_arg, + tree_annotation, tree_refs, add_tree_ref, remove_tree_ref, + alias_leader, set_alias_leader, set_tree_flag, clear_tree_flag, + reset_tree_flags, tree_flags, indirect_var, set_indirect_var, + bb_refs, remove_bb_ref, set_exprref_class, exprref_class, + set_exprref_inserted, exprref_inserted, set_exprref_save, + exprref_save, set_exprref_reload, exprref_reload, + set_exprref_processed, set_exprref_processed2, exprref_processed2i, + exprref_uses, set_exprref_uses, set_expruse_def, expruse_def, + set_expruse_phiop, expruse_phiop, set_expruse_phi, expruse_phi, + set_expruse_has_real_use, expruse_has_real_use, + set_exprphi_phi_args, exprphi_phi_args, num_ephi_args, ephi_arg, + set_ephi_arg, set_exprphi_downsafe, exprphi_downsafe, + set_exprphi_canbeavail, exprphi_canbeavail, set_exprphi_later, + exprphi_later, set_exprphi_extraneous, exprphi_extraneous, + exprphi_willbeavail, is_assignment_stmt, is_may_ref, is_may_def, + is_may_use, is_partial_ref, is_partial_use, is_volatile_ref, + is_volatile_def, is_volatile_use, is_clobbering_def, + is_relocating_def, is_addressof_use, is_pure_use, is_pure_def, + rli_after_end, rli_step, rli_step_rev, rli_ref, get_last_ref, + get_first_ref, ref_list_is_empty): Remove. Update all users. + + * tree-flow.h: Update copyright notices. + Remove doxygen markers. + Include hashtab.h. + (enum tree_ann_type): New. + (struct tree_ann_common_d): New. + (struct var_ann_d): New. + (struct operands_d): New. + (struct voperands_d): New. + (operands_t): New type. + (voperands_t): New type. + (struct dataflow_d): New. + (dataflow_t): New type. + (struct stmt_ann_d): New. + (tree_ann): New type. + (var_ann_t): New type. + (stmt_ann_t): New type. + (bb_ann_t): Rename from bb_ann. + (enum tree_ref_type, TRM_*, struct ref_list_node, struct + ref_list_priv, ref_list, struct tree_ref_common, struct var_ref_d, + struct var_def_d, struct var_phi_d, struct var_use_d, struct + phi_node_arg_d, phi_node_arg, struct expr_ref_common, struct + expr_phi_d, struct expr_use_d, enum tree_ref_structure_enum, union + tree_ref_d, tree_ref, struct tree_ann_d, tree_ann, enum tree_flags, + struct dfa_counts_d, ref_list_iterator): Remove. Update all users. + (TDFA_USE_OPS): Define. + (TDFA_USE_VOPS): Define. + + * tree-inline.c (walk_tree): Handle SSA_NAME nodes. + + * tree-optimize.c: Update copyright notices. + Remove doxygen markers. + (optimize_function_tree): Temporarily disable call to + tree_perform_ssapre. + Remove #if0 code. + + * tree-pretty-print.c (MASK_POINTER): Define. + (dump_vops): New function. + (dump_generic_node): Shorten made-up names for unnamed objects. + Hanlde PHI_NODE, VDEF_EXPR and SSA_NAME nodes. + Keep track of basic block transitions. + Call dump_vops if -vops dump option is given. + (op_prio): Don't abort if the operand is nil. + (dump_block_info): Don't keep track of basic block transitions. + + * tree-simple.c: Update copyright notices. + (get_base_symbol): Call STRIP_NOPS. + Handle SSA_NAME nodes. + + * tree-simple.h: Update copyright notices. + (gsi_end_p): Rename from gsi_end. Update all callers. + + * tree-ssa-ccp.c: Update copyright notices. + Update code to use the new SSA infrastructure. + (const_values): New hash table to keep track of constants. + (struct value_map_d): New. + (cfg_edges): Rename from edges. Update all users. + (set_value): New function. + (get_value): New function. + (get_default_value): New function. + (value_map_hash): New function. + (value_map_eq): New function. + + * tree-ssa-dce.c: Update copyright notice. + Update code to use new SSA infrastructure. Factor some code into + new functions. + (dom_info): Declare with file scope. + (struct stmt_stats): Add fields 'total_phis' and 'removed_phis'. + (needed_stmts): New hash table to keep track of needed statements. + (stmt_useful_p): New function. + (find_useful_stmts): Call it. + (remove_dead_stmt, remove_dead_phis): New functions. + (remove_dead_stmts): Call them. + (need_to_preserve_store): Preserve stores to volatile variables. + (tree_ssa_dce): Rename from tree_ssa_eliminate_dead_code. Update + all users. + + * tree-ssa.c: Update copyright notice. + Change basic algorithm to rewrite the function into SSA form + instead of building factored use-def chains. + Include hashtab.h and tree-dump.h + (next_ssa_version): New global variable. + (def_blocks): New file local variable. + (struct def_blocks_d): New. + (currdefs): New file local variable. + (struct currdef_d): New. + (rewrite_into_ssa): Rename from build_tree_ssa. Update all users. + Call compute_may_aliases, mark_def_sites and rewrite_block. + (rewrite_block): Rename from search_fud_chains. Call + rewrite_stmts. + (mark_def_sites): New function. + (set_def_block): New function. + (rewrite_stmts): New function. + (rewrite_stmt): New function. + (rewrite_operand): New function. + (rewrite_out_of_ssa): New function. + (remove_phi_node): New function. + (register_new_def): New function. + (def_blocks_free): New function. + (def_blocks_hash): New function. + (def_blocks_eq): New function. + (currdef_hash): New function. + (currdef_eq): New function. + (debug_def_blocks): New function. + (debug_def_blocks_r): New function. + (build_fud_chains, compute_reaching_defs, follow_chain, + dump_reaching_defs, debug_reaching_defs, set_ssa_links): Remove. + (remove_phi_arg): Rename from tree_ssa_remove_phi_alternative. + Update all users. + (init_tree_ssa): Set next_ssa_version to 1. + Create hash tables def_blocks and currdefs. + (delete_tree_ssa): Accept a FUNCTION_DECL tree as argument. Update + all users. + (currdef_for): Add new parameter 'create_default'. If nonzero, + create a new SSA name if none is found for the variable. + (set_currdef_for): Search in the currdefs hash table. + + * tree.c (tree_node_kind): Add new values phi_kind and + ssa_name_kind. + (tree_node_kind_names): Likewise. + (tree_size): Handle PHI_NODE and SSA_NAME nodes. + (make_node): Likewise. + (tree_node_structure): Likewise. + (phi_node_elt_check_failed): New function. + (make_phi_node): New function. + (make_ssa_name): New function. + (build_vdef_expr): New function. + + * tree.def (SSA_NAME): New code. + (VDEF_EXPR): New code. + (PHI_NODE): New code. + + * tree.h (union tree_ann_d): Forward declare. + (struct tree_common): Change type of field 'ann'. + (PHI_NODE_ELT_CHECK): Define. + (phi_node_elt_check_failed): Declare. + (VDEF_RESULT): Define. + (VDEF_OP): Define. + (SSA_NAME_DECL): Define. + (SSA_NAME_DEF_STMT): Define. + (SSA_NAME_VERSION): Define. + (struct tree_ssa_name): New. + (PHI_RESULT): Define. + (PHI_NUM_ARGS): Define. + (PHI_ARG_CAPACITY): Define. + (PHI_ARG_ELT): Define. + (PHI_ARG_EDGE): Define. + (PHI_ARG_DEF): Define. + (struct phi_arg_d): New. + (struct tree_phi_node): New. + (SSA_DECL_P): Define. + (SSA_VAR_P): Define. + (enum tree_node_structure_enum): Add values TS_SSA_NAME and + TS_PHI_NODE. + (union tree_node): Add fields 'ssa_name' and 'phi'. + (make_phi_node): Declare. + (make_ssa_name): Declare. + (build_vdef_expr): Declare. + (TDF_BLOCKS): Rename from TDF_BLOCK. + (TDF_VOPS): Define. + + * doc/invoke.texi: Document new tree dump option -vops. Update + documentation for switch -blocks. + +2003-01-27 Jeff Law <law@redhat.com> + + * gimplify.c (simplify_return_expr): Correctly handle return + expressions with side effects in functions returning void. + + * tree-ssa-ccp.c (widen_bitfield): Do not try to widen anything + except constant integers. + +2003-01-26 Jeff Law <law@redhat.com> + + * c-simplify.c (simplify_decl_stmt): Fix comment typo. + Use correct predicate when "simplifying" a static initializer. + +2003-01-26 Andreas Jaeger <aj@suse.de> + + * Makefile.in (gt-dependence.h): New rule. + +2003-01-23 Jeff Law <law@redhat.com> + + * c-simplify.c (simplify_decl_stmt): Arrange to examine initializers + for static variables. + * gimplify.c (simplify_constructor): Kill initial is_simple_constructor + check. + (simplify_modify_expr): Get the type from the destination rather than + the toplevel expression. Handle case where type is ARRAY_TYPE. Ignore + TREE_STATIC for the RHS. + +2003-01-24 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_varname_tree): Check for non-NULL DECL_NAME + before trying to cplus_demangle it. + +2003-01-23 Jeff Law <law@redhat.com> + + * tree-cfg.c (make_exit_edges): Fix thinkos. + +2003-01-22 Jeff Law <law@redhat.com> + + * tree-cfg.c (make_goto_expr_edges): Check the underlying + LABEL_DECL, not the LABEL_EXPR for FORCED_LABEL and NONLOCAL_LABEL. + + * gimplify.c (simplify_expr, case GOTO_EXPR): Identify and mark + labels which are targets of nonlocal gotos and mark functions which + have labels which are targets of nonlocal gotos. + (simplify_expr, case LABEL_DECL): New case. Mark labels which + have their address taken. + * tree-cfg.c (is_nonlocal_label_block): Remove. All callers + updated. + (make_exit_edges, case GOTO_EXPR): Handle computed gotos sanely. + (make_exit_edges, case CALL_EXPR): Handle abnormal edges from + nonlocal gotos at call sites. + (make_exit_edges, case RETURN_EXPR): Likewise. + (make_exit_edges, case MODIFY_EXPR): New case to handle abnormal + edges from nonlocal gotos as call sites. + (make_goto_expr_edges): Handle computed gotos and nonlocal gotos. + (is_ctrl_altering_stmt): Handle abnormal edges in CALL_EXPRs + functions which receive nonlocal gotos. Similarly for CALL_EXPRs + which occur on the RHS of a MODIFY_EXPR. + * tree.h (FORCED_LABEL, NONLOCAL_LABEL): New defines. + (FUNCTION_RECEIVES_NONLOCAL_GOTO): Likewise. + +2003-01-22 Frank Ch. Eigler <fche@redhat.com> + + * doc/invoke.texi: Provide some information about -fmudflap. + + * tree-mudflap.c (mf_varname_tree): Conditionally invoke the C++ + demangler in libiberty. Reduce function printing verbosity. + (mf_file_function_line_tree): Reduce function printing verbosity. + (mudflap_enqueue_decl): Use COMPLETE_TYPE_P to avoid trying to + register (get size of) void-typed objects. + +2003-01-21 Jose Renau <renau@uiuc.edu> + + * tree-flow-inline.h (get_lineno): Return -1 for nodes without + locus information. + (get_filename): Return "???" for nodes without locus information. + +2003-01-21 Jeff Law <law@redhat.com> + + * tree-cfg.c (cleanup_switch_expr_graph): Wrap declaration of + switch_expr with ENABLE_CHECKING block. + + * c-simplify.c (is_last_stmt_of_scope): Wrap definition and + declaration inside and ENABLE_CHECKING block. + +2003-01-20 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mx_xfn_indirect_ref): Use new TREE_LOCUS field + as a predicate for finding TREE_FILENAME etc. + +2003-01-16 Daniel Berlin <dan@dberlin.org> + + * Remove dead PRE code. + * tree-ssa-pre.c (tree_perform_ssapre): Collect left occurrences and + kills *after* finishing collecting all expressions. + +2003-01-15 Jeff Law <law@redhat.com> + + * Death to WFL nodes. + * c-aux-info.c: Replace DECL_SOURCE_FILE and DECL_SOURCE_LINE with + TREE_FILENAME and TREE_LINENO respectively when retrieving file + and line information. Use TREE_LOCUS to copy existing information + from one node to another. Use annotate_with_file_line to add or + replace location information on a node. Remove support for + EXPR_WITH_FILE_LOCATION nodes. Remove STRIP_WFL statements. + * c-common.c, c-parse.in, c-pretty-print.c, dbxout.c: Likewise. + * diagnostic.c, dwarf2out.c, dwarfout.c: Likewise. + * except.c, integrate.c, stmt.c, tree-alias-common.c: Likewise. + * tree-cfg.c, tree-dfa.c, tree-dump.c, tree-flow-inline.h: Likewise. + * tree-mudflap.c, tree-pretty-print.c, tree-simple.c: Likewise. + * tree-ssa-ccp.c, tree-ssa-dce.c, tree-ssa-pre.c: Likewise. + * varasm.c, xcoffout.c: Likewise. + * config/alpha/alpha.c: Likewise. + * config/mips/mips.c: Likewise. + * c-decl.c: Likewise. + (duplicate_decls): Also copy TREE_LOCUS from olddecl to newdecl. + (finish_function): Save and restore the current filename and + linenumber around genericizing of the function tree. + * c-simplify.c (c_simplify_stmt): Use annotate_all_with_file_line + instead of wrap_all_with_wfl. Remove STRIP_WFL statements. + * expr.c (expand_expr): Emit line number notes for expressions + with attached file/line information. Remove EXPR_WITH_FILE_LOCATION + support. + * gimplify.c: Kill STRIP_WFL statements. Remove EXPR_WITH_FILE_LOCATION + support. + (simplify_expr_wfl): Kill. + (annotate_stmt_with_file_line): Renamed from wrap_with_wfl. + (annotate_all_with_file_line): Renamed from wrap_all_with_wfl. + (simplify_expr): Save and restore the current file/line around + simplification of the given expression. Add annotation to more + nodes created during simplification. + (simplify_self_mod_expr): Add file/line location to nodes we create. + (get_initialized_tmp_var): Similarly. + * old-tree-inline.c (expand_call_inline): Use annotate_with_file_line + to add file/line information to nodes instead of wrapping them + with EXPR_WITH_FILE_LOCATION nodes. + * print-tree.c: Use TREE_FILENAME and TREE_LINENO instead of + DECL_SOURCE_FILE and DECL_SOURCE_LINE respectively. Remove + support for EXPR_WITH_FILE_LOCATION nodes. + (print_node): Dump any file/line information that is attached to + the given node. + * tree-inline.c (walk_tree): Set lineno appropriately. + * tree-simple.h (annotate_all_with_file_line): Renamed from + wrap_all_with_wfl. Remove STRIP_WFL statements. + * tree.c (build_expr_wfl): Kill. + (make_node): Use annotate_with_file_line. + (annotate_with_file_line): New function. + * tree.def: Remove EXPR_WITH_FILE_LOCATION. + * tree.h (tree_common): Add locus field. Remove references to + EXPR_WITH_FILE_LOCATION. + (tree_decl): Remove locus field. + (STRIP_WFL, EXPR_WFL_*): Kill. + (DECL_SOURCE_LOCATION, DECL_SOURCE_FILE, DECL_SOURCE_LINE): Kill. + (TREE_LOCUS, TREE_FILENAME, TREE_LINENO): new. + (annotate_with_file_line): Renamed from build_expr_wfl. + + * objc/objc-act.c: Use TREE_FILENAME and TREE_LINENO to + extract file/line information from tree nodes. + +2003-01-14 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mx_xfn_indirect_ref): Handle ARRAY_REF of + a COMPONENT_REF specially to avoid unnecessary checks. + +2003-01-13 Frank Ch. Eigler <fche@redhat.com> + + Front-end generalization. + * Makefile.in (C_AND_OBJC_OBJS): Add c-mudflap.o and dependencies. + * tree-mudflap.c: Don't include "c-tree.h" any more. + (mf_init_extern_trees): Divert to mflang_lookup_decl(). + (mf_enqueue_register_call, mf_flush_enqueued_calls): Move and rename + these functions. + * tree-mudflap.h: Declare new mflang_* routines. + * c-mudflap.c: New file with C front-end mflang_* routines. + * tree-nomudflap.c (*): Call internal_error instead of abort. + +2003-01-07 Steven Bosscher <s.bosscher@student.tudelft.nl> + + * Makefile.in (check-g95): New test target. + (check-f95): Alias for check-g95. + +2003-01-07 Diego Novillo <dnovillo@redhat.com> + + * tree-dump.c (dump_function_to_file): New function. + (dump_function): Call it. + Convert argument declaration to K&R format. + * tree-dump.h: Include splay-tree.h. + (dump_function_to_file): Declare. + + * tree-optimize.c (optimize_function_tree): Remove unused variables + dump_file and dump_flags. + (dump_current_function): Remove. Update all users by calling + dump_function instead. + * tree.h (dump_current_function): Remove declaration. + + * Makefile.in (TREE_DUMP_H): Define. + Update targets depending on tree-dump.h to depend on $(TREE_DUMP_H). + (tree-ssa-cp.o): Remove unused target. + (tree-cfg.o): Add dependency on $(TREE_DUMP_H). + (tree-optimize.o): Likewise. + (tree-ssa-dce.o): Likewise. + (tree-ssa-ccp.o): Likewise. + (tree-ssa-pre.o): Likewise. + +2003-01-02 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (rename_2): Fix a false matching condition. + This is actually fallout from is_default_def change. + +2003-01-02 Jason Merrill <jason@redhat.com> + + * c-simplify.c (c_genericize): Dump more info about the function. + Use dump_function. + * tree-dump.c (dump_function): Move from cp/optimize.c. + * tree-dump.h: Declare it. + + * gimplify.c (mostly_copy_tree_r): Remove unnecessary cases. + (unshare_expr): New fn. + * tree-inline.c (mark_local_for_remap_r, unsave_r): New fns, adapted + from C++ versions. + (lhd_unsave_expr_now): Likewise. + * tree.c (unsave_expr_now): Remove. + (unsafe_for_reeval): Labels and BIND_EXPRs are only somewhat unsafe. + + * gimplify.c (simplify_function_tree): Add an outer BIND_EXPR if + needed. + (voidify_wrapper_expr): Not static. Abort if we try to voidify an + expression with TREE_ADDRESSABLE type. Be clever with INDIRECT_REFs. + (foreach_stmt): Avoid redundant work. + (create_tmp_var): Abort if we try to create a temp of ADDRESSABLE type. + (simplify_expr): Simplify VTABLE_REF. + * c-simplify.c (simplify_decl_stmt): Ignore DECL_EXTERNAL decls. + (simplify_stmt_expr): Fix thinko. + (simplify_block): Don't ignore partial scopes. + (simplify_condition): New fn. + (simplify_c_loop, simplify_if_stmt, simplify_switch_stmt): Call it. + * expr.c (expand_expr) [BIND_EXPR]: Handle statics better. + * tree-inline.c (remap_decl): Remap all decls. + (declare_return_variable): Be clever with INDIRECT_REFs. + (expand_call_inline): If we have an explicit return slot, the inlined + body is void. + (walk_tree): Fix type handling. + (copy_tree_r): Don't walk into decls. + * tree-simple.c (is_simple_unary_expr): Handle VTABLE_REF. + (is_simple_id): Allow RESULT_DECL. + * tree-simple.h (gsi_stmt): Strip WFLs and NOPs. + + * gimplify.c (simplify_cond_expr): Handle void arms. Add target parm. + (simplify_modify_expr): Pass it. Add special handling for COND_EXPR + and CONSTRUCTOR (from Daniel Berlin). Add want_value parm. + (simplify_expr): Pass new args. Loop sooner if language-specific + simplification happened. + (simplify_return_expr): Pass the whole MODIFY_EXPR to simplify_expr. + (simplify_target_expr): Simplify. + + * tree.def (CATCH_EXPR, EH_FILTER_EXPR): New tree codes. + * except.c (expand_eh_handler): New fn. + (expand_eh_region_end_allowed): If no types are allowed, hand off to + expand_eh_region_end_must_not_throw. + * except.h: Declare expand_eh_handler. + * expr.c (expand_expr) [TRY_CATCH_EXPR]: Use it. + [CATCH_EXPR, EH_FILTER_EXPR]: New cases. + * gimplify.c (simplify_expr) [EXC_PTR_EXPR, CATCH_EXPR, + EH_FILTER_EXPR]: New cases. + (gimple_build_eh_filter): New fn. + (maybe_protect_cleanup): New fn. + (gimple_push_cleanup): Call it. + (simplify_cleanup_point_expr): Fix thinko. + * c-simplify.c (simplify_cleanup): Call it. + * tree-simple.h: Declare it. + * Makefile.in (gimplify.o): Depend on except.h. + * tree.h (CATCH_TYPES, CATCH_BODY): New macros. + (EH_FILTER_TYPES, EH_FILTER_FAILURE): New macros. + * tree-simple.c (is_simple_id): Allow EXC_PTR_EXPR. + * c-pretty-print.c (dump_c_node) [CLEANUP_POINT_EXPR]: Support. + * tree-pretty-print.c (dump_generic_node): Likewise. + [CATCH_EXPR, EH_FILTER_EXPR, EXC_PTR_EXPR]: Support. + + * c-pretty-print.c (NIY): Print operands. + (dump_c_tree): Don't look at TREE_CHAIN if it doesn't matter. + (dump_c_node) [ARRAY_TYPE]: Handle non-constant array bounds. + [CALL_EXPR]: Pass spc down. + [VTABLE_REF]: Support. + (op_prio) [TARGET_EXPR]: Support. + (print_call_name): Handle function pointers. + * tree-pretty-print.c: Likewise. + +2002-12-31 Steven Bosscher <s.bosscher@student.tudelft.nl> + + * gimplify.c (create_tmp_var_noc): Remove unused function. + * tree-simple.h: Kill prototype. + +2002-12-30 Diego Novillo <dnovillo@redhat.com> + + * tree-flow.h (tree_find_loops): Remove unused declaration. + +2002-12-29 Daniel Berlin <dberlin@dberlin.org> + + * toplev.c: Add flag_ip, enable by default at -O4+ (This is not + set in stone, and thus, not documented). + (decode_f_option): Add warning if andersen's PTA is selected but + not compiled in. + + * flags.h: Add flag_ip. + + * tree-alias-ander.c: Fix todo. + (andersen_function_call): Return 1 if we don't need to process + the function. + (ptset_map): New map, cache points-to sets. + (andersen_op): We can do IP on all statics without help. + (andersen_init): Only init once if we are doing ip analysis. + (andersen_cleanup): Don't cleanup if we need the info for ip. + (andersen_add_var): Clear points-to set if it exists already. + (andersen_add_var_same): Ditto. + (andersen_function_call): We can do interprocedural analysis on + statics. + (andersen_may_alias): Cache points-to sets. + + * c-decl.c (c_expand_body): Don't throw away tree if flag_ip is + on, even if they are uninlinable, they may be wanted for ip + optimizations. + + * tree-alias-common.c (get_values_from_constructor): New + function to collect alias_typevars from constructors. + (alias_annot): Fix where the GTY is so gengtype picks it up. + (intra_function_call): Ignore non-pointers for global var + assignment. What arguments point to can now point to a global var + as well. + (find_func_aliases): We need to handle decl's with initials as + well. + Only call intra_function_call if we have to. + Handle constructors. + (create_fun_alias_var): Incoming pointer arguments could be + pointing to a global var, unless this is a static function and we + are doing interprocedural analysis. + (create_alias_vars): Take an fndecl argument, and use it. + (init_alias_vars): Handle ip_partial as well. + (ptr_may_alias_var): Simplify, fix. + + * tree-alias-common.h (tree_alias_ops): function_call now returns + an int, and we have an extra member named ip_partial. + + * tree-alias-steen.c (steen_ops): We can't do ip_partial. + (steen_function_call): Update definition and return 1. + + * tree-dfa.c (compute_may_aliases): Call create_alias_vars with + current_function_decl. + + * tree-flow.h (create_alias_vars): Remove proto from here, it's + in tree-alias-common.h. + (tree_perform_ssapre): Take a tree, like the other optimizers. + + * tree-optimize.c (optimize_function_tree): Call + tree_perform_ssapre with a tree. + + * tree-ssa-pre.c: Remove dead, #if 0'd code. + (tree_perform_ssapre): Use passed in tree. + +2002-12-23 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_decl_cache_locals, mf_decl_clear_locals): New + functions. + (mudflap_c_function): Call them before/after basic transforms. + (mf_cache_shift_decl_l, ..._mask_l): New variables to track local + VAR_DECL shadows of cache parameters. + (mf_build_check_statement_for): Use and update them. + +2002-12-23 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mx_register_decls): Trust incoming TREE_ADDRESSABLE + instead of own timetaking analysis. + (mf_find_addrof, mx_xfn_find_addrof): Removed functions. + +2002-12-23 Steven Bosscher <s.bosscher@student.tudelft.nl> + + * tree-dfa.c: Add doxygen markers in comments. + +2002-12-22 Diego Novillo <dnovillo@redhat.com> + + * gimplify.c: Undo the following change: + 2002-12-11 Diego Novillo <dnovillo@redhat.com> + * gimplify.c (simplify_return_expr): return statements should + only have a GIMPLE value as argument. + + * tree-simple.c: Fix grammar for return statements. + +2002-12-20 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_init_extern_trees): Rewrite last change + without using statement-expressions. + +2002-12-19 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (build_tree_cfg): Make sure that TV_TREE_CFG + is popped properly. + +2002-12-19 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_init_extern_trees): Abort gracefully if + <mf-runtime.h> was not included. + (*): Correct some minor compiler warnings elsewhere. + +2002-12-18 Diego Novillo <dnovillo@redhat.com> + + * configure: Regenerate with autoconf 2.13. + +2002-12-17 Ben Elliston <bje@redhat.com> + + * tree-optimize.c (optimize_function_tree): Temporarily + disable SSA optimizations if -fmudflap is present. + +2002-12-16 Ben Elliston <bje@redhat.com> + + * tree-mudflap.c (mx_flag): Assert that the tree node is valid. + +2002-12-14 Jason Merrill <jason@redhat.com> + + * tree-dump.c (dump_files): Add .generic. Move .inlined after it. + * tree.h (tree_dump_index): Likewise. + * c-simplify.c (c_genericize): Emit original and generic dumps here. + * c-decl.c (c_expand_body): Not here. + +2002-12-13 Ben Elliston <bje@redhat.com> + + * tree-dfa.c (find_refs_in_expr): Terminate comment. + +2002-12-12 Steven Bosscher <s.bosscher@student.tudelft.nl> + + * tree-cfg.c: Update doxygen documentation. + * tree-dfa.c: Add doxygen documentation. + +2002-12-11 Steven Bosscher <s.bosscher@student.tudelft.nl> + + * tree-cfg.c: Add doxygen markers in comments. + * tree-optimize.c: Likewise. + * tree-ssa.c: Likewise. + +2002-12-11 Diego Novillo <dnovillo@redhat.com> + + * gimplify.c (simplify_return_expr): return statements should only + have a GIMPLE value as argument. + * tree-cfg.c (call_expr_flags): New function. + (is_ctrl_altering_stmt): Call it. + * tree-flow.h (extern): Declare it. + +2002-12-06 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (make_goto_expr_edges): Temporary hack to prevent + removing blocks with nonlocal labels. + (is_nonlocal_label_block): Return true if DECL_NONLOCAL is set for + the label. + + * tree-dfa.c (alias_leaders): New local array. + (num_alias_leaders): New local variable. + (find_alias_leader): New local function. + (may_access_global_mem): New local function. + (find_may_aliases_for): Call them. + (compute_may_aliases): Allocate and deallocate alias_leaders. + Show alias information if -fdump-tree-...-alias flag is given. + (may_alias_p): Return true if both variables are the same. + (find_refs_in_expr): Strip WFL and NOPs from the parent statement. + If a pointer relocation is due to a function call, assignment from + a global or a function argument, mark the pointer as a may-alias + for global storage. + (dump_referenced_vars): Reformat output. + (dump_variable): Likewise. + + * tree-dump.c (dump_option_value_info): Add entry for TDF_ALIAS. + * tree.h (TDF_ALIAS): Define. + * doc/invoke.texi: Document new flag. + + * tree-flow-inline.h (may_alias_global_mem_p): New function. + * tree-flow.h (enum tree_flags): Add value TF_MAY_ALIAS_GLOBAL_MEM. + (may_alias_global_mem_p): Declare. + + * tree-simple.c (get_base_symbol): Return NULL_TREE, not NULL. + * tree-ssa-ccp.c (tree_ssa_ccp): Remove unused variable. + * tree-ssa-dce.c (need_to_preserve_store): Call + decl_function_context instead of DECL_CONTEXT. + If the symbol may alias global memory, return nonzero. + + * tree-ssa.c (dump_reaching_defs): Reformat output. + (set_currdef_for): Walk the alias leader chain, setting CURRDEF for + all the alias sets that may be affected by the definition. + +2002-12-06 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (may_alias_p): Fix global variables and points-to. + +2002-12-03 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa.c (delete_tree_ssa): Move call to delete_alias_vars + above resetting num_referenced_vars. + +2002-12-03 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in: Add dependencies on $(TM_H) and coretypes.h for the + files mentioned below. + * old-tree-inline.c: Include tm.h and coretypes.h. + * c-pretty-print.c: Likewise. + * disjoint-set.c: Likewise. + * tree-alias-ecr.c: Likewise. + * tree-alias-type.c: Likewise. + * tree-alias-ander.c: Likewise. + * tree-alias-steen.c: Likewise. + * tree-alias-common.c: Likewise. + * tree-ssa.c: Likewise. + * tree-ssa-pre.c: Likewise. + * tree-cfg.c: Likewise. + * tree-dfa.c: Likewise. + * tree-optimize.c: Likewise. + * c-simplify.c: Likewise. + * gimplify.c: Likewise. + * tree-browser.c: Likewise. + * simple-break-elim.c: Likewise. + * simple-goto-elim.c: Likewise. + * tree-dchain.c: Likewise. + * c-call-graph.c: Likewise. + * tree-simple.c: Likewise. + * tree-nomudflap.c: Likewise. + * tree-pretty-print.c: Likewise. + * tree-ssa-dce.c: Likewise. + * tree-ssa-ccp.c: Likewise. + * dependence.c: Likewise. + * tree-mudflap.c: Likewise + (mx_xfn_indirect_ref): Use size_type_node instead of c_size_type_node. + +2002-12-03 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c: Undo this change that causes bootstrap + failures: + + 2002-12-02 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (may_alias_p): Artificial variables + can also be aliased. + +2002-12-03 Andreas Jaeger <aj@suse.de> + + * tree-simple.c (right_assocify_expr): Remove unused variable. + +2002-12-02 Andrew MacLeod <amacleod@redhat.com> + + * gimplify.c (simplify_cleanup_point_expr): gsi_stmt can return NULL, + use gsi_end. + * tree-cfg.c (make_blocks): Use gsi_end, gsi_stmt can return NULL. Set + basic_block for empty_stmt_node containers. + (make_edges): Stmt's can be NULL. + (make_ctrl_stmt_edges, make_exit_edges, make_loop_expr_edges, + make_cond_expr_edges, make_goto_expr_edges, is_nonlocal_label_block, + block_invalidates_loop, cleanup_control_flow, cleanup_cond_expr_graph, + cleanup_switch_expr_graph, disconnect_unreachable_case_labels, + find_taken_edge, tree_cfg2dot, successor_block, is_latch_block, + switch_parent, first_stmt, last_stmt): Check for first_stmt() or + last_stmt() returning NULL. + (remove_tree_bb, first_exec_stmt): Use gsi_end. + (last_stmt_ptr): Iterate to find last execuatbel stmt_ptr in a block. + (gsi_start_bb): Return first non-empty stmt, if there is one. + (set_bb_for_stmt): Don't decend into an empty_stmt_node. + * tree-dfa.c (find_tree_refs): Use gsi_end. + (collect_dfa_stats): Use gsi_end_bb. + * tree-flow-inline.h (gsi_step_bb): split. + (gsi_step_in_bb): gsi_step with explicit bb specified. Never return + empty_stmt_node. + (gsi_start_bb): Move to tree-cfg.c. + (gsi_end_bb): New. Have we reached the end of a basic block. + * tree-flow.h (gsi_start_bb): Make external. + (gsi_end_bb, gsi_step_in_bb): New prototypes. + * tree-simple.h (gsi_end): renamed from gsi_after_end. + (gsi_stmt): Return NULL if stmt is an empty_stmt_node or error mark. + * tree-ssa-ccp.c (simulate_block, substitute_and_fold): Use gsi_end. + * tree-ssa-dce.c (mark_control_parent_necessary, find_useful_stmts, + remove_dead_stmts): Use gsi_end_bb. + (process_worklist): Check for NULL last_stmt. + * tree-ssa-pre.c (finalize_1): Use gsi_end_bb, gsi_stmt can be NULL. + +2002-12-02 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (dump_ref): Display '<nil>' for NULL references. + (dump_phi_args): Handle NULL arguments. + (may_alias_p): Artificial variables can also be aliased. + +2002-12-02 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (okay_injuring_def): inj could be null. + (get_operand): Use instead of special casing INDIRECT_REF and + COMPONENT_REF everywhere. + (names_match_p): Fix. + (defs_match_p): Ignore partial uses. + (rename_2): Fix non-matching condition. + (update_old_new): Update the kills and lefts arrays. + (finalize_1): Set the bb for the new statement. + (update_ssa_for_new_use): Ditto. + (code_motion): Ditto. + (call_modifies_slot): Handle function pointers (where we end up + with a _DECL as our argument). + (pre_part_1_trav): Update the kills and lefts arrays. + Just use TREE_TYPE (ei->expr) for type of expression. + (add_left_occ): New helper function. + (process_left_occs_and_kills): Add other cases we need to handle. + (tree_perform_ssapre): Add new processed array, since for left + occurrences and kills, we need to process *all* statements, not + just ones we might consider candiates for PRE. + +2002-12-02 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_refs_in_expr): Look for references in + VA_ARG_EXPR nodes. + +2002-12-01 Diego Novillo <dnovillo@redhat.com> + + * tree-optimize.c (optimize_function_tree): Undo + inadvertent change in previous commit. + +2002-12-01 Diego Novillo <dnovillo@redhat.com> + + * fold-const.c (operand_equal_p): Check for NULL TREE_TYPEs. + + * tree-cfg.c (remove_stmt): Call remove_ref. + (disconnect_unreachable_case_labels): Do not disconnect the edge + going to the block holding the BIND_EXPR node for the switch() + body. + (dump_tree_cfg): Call dump_current_function. + + * Makefile.in (tree-dfa.o): Depend on convert.h. + * tree-dfa.c: Include convert.h. + (remove_def): New local function. + (reset_def_def_links): New local function. + (replace_phi_arg_with): New local function. + (replace_ref_with): New function. + (try_replace_ref_with): Rename from replace_ref_in. + Also look for V_USE references on the LHS of assignments. + When replacing the callee of a CALL_EXPR, make sure that the type + of the new callee is compatible with the old one. + (replace_ref_r): Call operand_equal_p. + (remove_ref): New function. + (same_var_p): New function. + (dump_referenced_vars): Add new flag DETAILS. Update all users. + (debug_referenced_vars): Likewise. + + * tree-ssa.c (dump_reaching_defs): Change output format. + (set_ssa_links): Don't set def-def links for PHI nodes. + + * tree-ssa-ccp.c (replace_uses_in): Add new argument COMMIT. + Update all users. + + * tree-optimize.c (dump_current_function): New function. + (optimize_function_tree): Call it. + * tree.h (dump_current_function): Declare. + * c-decl.c (c_expand_body): Call dump_current_function. + * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Likewise. + * tree-ssa-pre.c (tree_perform_ssapre): Likewise. + * tree-ssa.c (build_tree_ssa): Likewise. + * tree-ssa-ccp.c (tree_ssa_ccp): Likewise. + Dump variables and reaching definitions if TDF_DETAILS is set. + + * tree-pretty-print.c (print_call_name): Call dump_generic_node for + NOP_EXPR operands. + + * tree-ssa-pre.c: Don't include c-common.h nor c-tree.h + Replace calls to build_modify_expr with build everywhere. + Replace calls to deep_copy_node with copy_node_r everywhere. + +2002-11-29 Andreas Jaeger <aj@suse.de> + + * c-call-graph.c (construct_call_graph): Fix format. + + * tree-alias-ander.c: Declare print_out_result. + + * tree-ssa-pre.c: Declare is_on_lhs and call_modifies_slot. + + * tree.h: Declare expand_asm_expr and add_var_to_bind_expr. + + * tree-inline.c: Declare remap_decls. + +2002-11-28 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.h: Start adding doxygen docs. + + * tree-alias-common.c: Ditto + +2002-11-28 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ander.c: Convert debug defines and ifdefs into + dump_file use. + + * tree.h: Add TDI_pta. + + * tree-dump.c: Add dump-tree-pta and TDI_pta. + +2002-11-28 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa-pre.o, tree-cfg.o, gimplify.o, tree-ssa-dce.o, + tree-ssa-ccp.o): Add dependency on $(TIMEVAR_H). + * timevar.def (TV_TREE_GIMPLIFY, TV_TREE_MAY_ALIAS, + TV_TREE_INSERT_PHI_NODES, TV_TREE_BUILD_FUD_CHAINS, TV_TREE_RDEFS): + New timers. + (TV_TREE_SSA): Remove. + (TV_INTEGRATION, TV_EXPAND): Switch order. + * c-decl.c (c_expand_body): Pop TV_EXPAND before running the tree + optimizers. + * gimplify.c (simplify_function_tree): Push/pop TV_TREE_GIMPLIFY. + * tree-cfg.c (build_tree_cfg): Push/pop TV_TREE_CFG. + * tree-dfa.c (compute_may_aliases): Push/pop TV_TREE_MAY_ALIAS. + * tree-ssa-ccp.c (tree_ssa_ccp): Push/pop TV_TREE_CCP. + * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Push/pop + TV_TREE_DCE. + Call compute_reaching_defs. + Remove debugging dumps before DCE. + * tree-ssa-pre.c (tree_perform_ssapre): Push/pop TV_TREE_PRE. + * tree-ssa.c (build_tree_ssa): Don't call compute_reaching_defs. + Don't call dump_reaching_defs. + (insert_phi_nodes): Push/pop TV_TREE_INSERT_PHI_NODES. + (build_fud_chains): Push/pop TV_TREE_BUILD_FUD_CHAINS. + (compute_reaching_defs): Push/pop TV_TREE_RDEFS. + Call dump_reaching_defs. + * tree-optimize.c (optimize_function_tree): Remove calls to + timevar_push and timevar_pop. + +2002-11-28 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa.o): Add dependency on $(TIMEVAR_H) and + tree-alias-common.h. + (tree-dfa.o): Likewise. + (tree-optimize.o): Add dependency on $(TIMEVAR_H). + * tree-dfa.c (compute_may_aliases): Move call to delete_alias_vars + * tree-ssa.c (delete_tree_ssa): ... here. + +2002-11-27 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_may_alias): Remove. Update all users. + (get_alias_index): Remove. Update all users. + (dfa_stats_d): Remove fields num_may_alias, max_num_may_alias, + num_alias_imm_rdefs and max_num_alias_imm_rdefs. Update all users. + (may_alias_p): Make extern. Move declaration to tree-flow.h. + (TRM_DEFAULT): Remove. Update all users. Update values of the + other TRM_* constants. + (create_ref): Don't initialize the PHI argument array with the + number of incoming edges. + (collect_dfa_stats): Do not traverse the function body with + walk_tree. + Free temporary hash table before returning. + (compute_may_aliases): Update comment. + (may_alias_p): Switch arguments if the first argument is not an + INDIRECT_PTR or the artificial global_var. + (find_may_aliases_for): If a pointer aliases a variable, set the + pointer to be the alias leader for the variable. + (ref_defines): Call may_alias_p. + (is_killing_def): Return false if the reaching definition is NULL. + Don't check for volatile definitions. + Change second argument to be a tree. Update all users. + + * tree-flow-inline.h (alias_imm_reaching_def): Remove. Update all + users. + (may_alias): Remove. Update all users. + (set_imm_reaching_def): Check for circularity. + (alias_leader): New function. + (set_alias_leader): New function. + (is_aliased): New function. + (is_default_def): Remove. Update all users. + + * tree-flow.h (struct var_ref_d): Remove field alias_imm_rdefs. + Update all users. + (struct var_def_d): Remove field m_default. Update all users. + (struct tree_ann_d): Remove field may_aliases. Update all users. + Add field alias_leader. + (struct dfa_counts_d): Remove fields num_may_alias and + num_may_alias_imm_rdefs. Update all users. + + * tree-ssa.c: Update documentation on may-alias processing. + (set_ssa_links): Remove third argument. Update all users. + (set_alias_imm_reaching_def): Remove. Update all users. + (create_default_def): Likewise. + (analyze_rdefs): Likewise. + (currdef_for): Move from tree-flow-inline.h + (set_currdef_for): Likewise. + (compute_reaching_defs): Rename from compute_tree_rdefs. Update + all users. + (follow_chain): Call is_killing_def instead of is_partial_def. + (tree_ssa_remove_phi_alternative): Remove unused variable ref. + (set_ssa_links): When processing V_USE references, make sure that + CURRDEF is a definition for the variable or one of its aliases. + +2002-11-26 Sebastian Pop <s.pop@laposte.net> + + * Makefile.in (OBJS): Add tree-browser.o. + (tree-browser.o): New dependency. + * tree-browser.c: New file. + * tree-browser.def: New file. + +2002-11-26 Jason Merrill <jason@redhat.com> + + Gimplify C++ cleanups. + * gimplify.c (voidify_wrapper_expr): Split out from... + (simplify_bind_expr): ...here. + (simplify_cleanup_point_expr): New fn. + (simplify_target_expr): New fn. + (gimple_conditional_context): New fn. + (gimple_push_condition, gimple_pop_condition): New fns. + (simplify_expr) [TRY_CATCH_EXPR]: Handle like TRY_FINALLY_EXPR. + * c-simplify.c (simplify_cleanup): New fn. + (c_simplify_stmt): Call it and lang_simplify_stmt. + (simplify_expr_stmt): Wrap the expr in a CLEANUP_POINT_EXPR. + (simplify_return_stmt, simplify_decl_stmt): Likewise. + (simplify_stmt_expr): Handle the STMT_EXPR_NO_SCOPE case. + (is_last_stmt_of_scope): Likewise. + * c-common.h: Declare c_genericize, c_simplify_stmt and + lang_simplify_stmt. + * c-common.c (lang_simplify_stmt): Define. + + Gimplify EXIT_EXPRs. + * gimplify.c (gimplify_loop_expr, gimplify_exit_expr): New fns. + (simplify_expr): Call them. + * expr.c (expand_expr) [LOOP_EXPR]: Pass 1 again for exit_flag. + + * tree-simple.c (right_assocify_expr): Also set TREE_SIDE_EFFECTS. + + * gimplify.c (simplify_expr): Call STRIP_TYPE_NOPS. + [REALPART_EXPR]: Don't just return. + + * tree-pretty-print.c (dump_c_node): Handle REFERENCE_TYPE. + * c-pretty-print.c (dump_c_node): Likewise. Handle null FOR_INIT_STMT. + +2002-11-25 Daniel Berlin <dberlin@dberlin.org> + + * config.gcc: Try committing the correct version. + * tree-alias-ander.c (andersen_may_alias): Add "!= NULL" to make + return a bool. + +2002-11-24 Daniel Berlin <dberlin@dberlin.org> + + * configure.in: Add --with-libbanshee, passed to us by toplevel if + libbanshee was configured. Substitute appropriate definitions for + Makefile (IE disabling tree-alias-ander building) if it wasn't. + * config.in: Regenerated. + * config.gcc: Rebuild libbanshee with stage1 on darwin to work + around system compiler problem. + * configure: Regenerated. + * Makefile.in: Add banshee stuff. + * tree-alias-ander.c: New file. + * tree-alias-ander.h: New file. + * tree-alias-common.c (get_alias_var): Fix field based stuff. + (find_func_aliases): Don't walk subtrees if we processed the tree. + (ptr_may_alias_var): Fix both field-based and non-field-based lookup. + +2002-11-22 Andrew MacLeod <amacleod@redhat.com> + + * tree-ssa-dce.c (mark_necessary): Split out mark_tree_necessary. Don't + mark if tree is already marked. + (mark_tree_necessary): New. Mark tree without processing control parent. + (mark_control_parent_necessary): Remove recursion, mark trees directly. + (need_to_preserve_store): Can expression/symbol affect external values. + (tree_ssa_eliminate_dead_code): Split. + (find_useful_stmts): Find initial set of needed statements. + (process_worklist): Find statements which calculate needed statements. + (remove_dead_stmts): Delete statements which are dead. + +2002-11-16 Jason Merrill <jason@redhat.com> + + Improve tree dumps. + * c-pretty-print.c, tree-pretty-print.c (dump_c_node): Handle + integers larger than a host word. + (op_prio): Handle INIT_EXPR. + * gimplify.c (simplify_bind_expr): Set TREE_SIDE_EFFECTS and type + of void_type_node on the COMPOUND_EXPRs as we walk. + * tree-simple.c (right_assocify_expr): Propagate the type from cur + rather than rhs. + + * c-decl.c (finish_function): Call c_genericize instead of + simplify_function_tree. + * c-simplify.c (c_genericize): New function. + (simplify_stmt_expr): Just genericize. + (simplify_compound_literal_expr): Likewise. + (c_build_bind_expr): Don't build a block for an artificial decl. + (simplify_decl_stmt): Add the variable to the temps list iff it's + artificial. + (c_simplify_expr): Don't call push/pop_context. + * c-decl.c (build_compound_literal): Set DECL_ARTIFICIAL. + * c-tree.h: Declare c_genericize. + + * c-simplify.c (tree_build_scope): Remove. + + Remove INIT_EXPR from GIMPLE. + * c-simplify.c (simplify_decl_stmt): Use MODIFY_EXPR. + * gimplify.c (simplify_bind_expr): Likewise. + (simplify_modify_expr): Convert INIT_EXPR to MODIFY_EXPR. + + * c-simplify.c (create_tmp_var_1): Drop; change all users to call + create_tmp_var. + (gimple_add_tmp_var): Now adds to the external temps list if + available, or directly to the function otherwise. + + Avoid gratuitous unused warnings. + * c-simplify.c (simplify_expr_stmt): Check TREE_SIDE_EFFECTS + directly. Also check for explicit conversions to void. + (expr_has_effect): Remove. + + * Makefile.in (OBJS): Remove tree-dchain.o. + + * stor-layout.c (variable_size): We don't care about + global_bindings_p if the frontend doesn't want a list of the + expressions. + +2002-11-13 Diego Novillo <dnovillo@redhat.com> + + * toplev.c (parse_options_and_default_flags): Enable SSA-CCP by + default with optimization >= 1. + * tree-dfa.c (find_refs_in_expr): Clobber '*.GLOBAL_VAR', not + 'GLOBAL_VAR'. + (collect_dfa_stats): Collect statistics on '*.GLOBAL_VAR'. + (compute_may_aliases): Make sure that variable is an INDIRECT_REF. + (may_alias_p): GLOBAL_VAR should alias INDIRECT_REFs. + Only check addressability on VAR_DECLs. + (find_may_aliases_for): Make sure argument is an INDIRECT_REF. + * tree-flow-inline.h (indirect_var): Call DECL_P. + (set_indirect_var): Call DECL_P. + Create annotation if it doesn't exist. + (create_indirect_ref): Move from tree-dfa.c. + * tree-flow.h (create_indirect_ref): Declare. + * tree-ssa-ccp.c (visit_phi_node): Avoid debugging dump from + accessing uninitialized data. + * tree-ssa.c (init_tree_ssa): Create an INDIRECT_REF node for + .GLOBAL_VAR. + +2002-11-12 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (delete_tree_cfg): Call free_aux_for_blocks. + Call free_basic_block_vars. + + * gimplify.c (simplify_expr): VA_ARG_EXPR nodes are in GIMPLE form + already. + Gimplify BIT_FIELD_REF nodes. + (simplify_call_expr): Update comment. + * tree-dfa.c (find_refs_in_expr): VA_ARG_EXPR nodes make no + data references. + Handle BIT_FIELD_REF nodes. + * tree-pretty-print.c (op_prio): Don't write an error message if + the operand is not recognized. + * tree-simple.c (is_simple_unary_expr): Handle BIT_FIELD_REFs. + (is_simplifiable_builtin): Only return false for MD builtins. + +2002-11-08 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (cleanup_switch_expr_graph): Handle edges going to + EXIT_BLOCK_PTR. + (first_stmt): Return NULL for ENTRY_BLOCK_PTR, EXIT_BLOCK_PTR and + INVALID_BLOCK. + * tree-dfa.c (find_refs_in_expr): Call mark_not_simple. + +2002-11-07 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa.o, tree-cfg.o, tree-dfa.o): Add dependency + on function.h + * tree-cfg.c: Include function.h. + (build_tree_cfg): Set dump_file to NULL after closing the file. + (remove_tree_bb): Don't dump warnings about statements being + removed. + (dump_tree_cfg): Use current_function_name. + Check that the flowgraph is not empty before dumping the function + body. + (tree_cfg2dot): Use current_function_name. + * tree-dfa.c: Include function.h + (dump_dfa_stats): Use current_function_name. + * tree-optimize.c (optimize_function_tree): Set dump_file to NULL + after closing the file. + * tree-pretty-print.c (dump_generic_node): Make sure that the + flowgraph exists before displaying block boundaries. + * tree-ssa-ccp.c (tree_ssa_ccp): Set dump_file to NULL after + closing the file. + * tree-ssa.c: Include function.h. + (build_tree_ssa): Set tree_ssa_dump_file to NULL after closing the + file. + (dump_reaching_defs): Use current_function_name. + (dump_tree_ssa): Likewise. + +2002-11-07 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (successor_block): Return EXIT_BLOCK_PTR if no + successor can be found while walking the nesting chain. + +2002-11-07 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c: Fix some formatting in code and comments. + (set_bb_for_stmt): Move from tree-flow-inline.h + * tree-dfa.c: Fix some formatting in code and comments. + * tree-flow-inline.h: Likewise. + * tree-flow.h: Likewise. + * tree-ssa.c: Likewise. + +2002-11-06 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa-ccp.o): Add dependency on tree-inline.h + * tree-cfg.c (find_taken_edge): New function. + (cleanup_cond_expr_graph): Call it. + (disconnect_unreachable_case_labels): Call it. + + * tree-dfa.c (struct clobber_data_d): Remove field + parent_expr_p. Update all users. + (find_refs_in_expr): Remove argument parent_expr_p. Update all users. + (create_ref): Remove arguments parent_expr_p and operand_p. Update + all users. + (replace_ref_in): Rename from replace_ref_operand_with. Update all + users. Find the operand in the statement and replace it with a new + operand. + (replace_ref_r): New local function. + (is_killing_def): Also handle V_PHI references. + (output_ref): Move from tree-flow-inline.h + + * tree-flow-inline.h (ref_expr): Remove. Update all users. + (restore_ref_operand): Remove. Update all users. + (set_output_ref): Remove. Update all users. + (is_assignment_stmt): New function. + (is_may_def, is_may_use, is_partial_def, is_partial_use, + is_volatile_def, is_volatile_use, is_default_def, + is_clobbering_def, is_initializing_def, is_relocating_def, + is_addressof_use, is_pure_use): Check reference type first. + (is_pure_def): New function. + + * tree-flow.h (struct tree_ref_common): Remove fields expr_p, + operand_p and orig_operand. Update all users. + (struct tree_ann_d): Remove field output_ref. Update all users. + + * tree-ssa-ccp.c: Include tree-inline.h. + (simulate_block): Simulate every statement in the block, not its + references + (simulate_def_use_chains): Simulate statements containing uses + reached by the definition. + (substitute_and_fold): Traverse statements, not references. + Call fold_stmt. + (visit_phi_node): If PHI node is marked volatile, assume varying. + (visit_stmt): Rename from visit_expression_for. Work on a + statement, not a reference. + (visit_assignment): Rename from visit_assignment_for. Work on a + statement, not a reference. + (visit_cond_stmt): Rename from visit_condexpr_for. Work on a + statement, not a reference. + (evaluate_stmt): Rename from evaluate_expr. Work on a statement, + not a reference. + (initialize): Initialize special definitions to varying. + (replace_uses_in): Work on a statement, not an expression. + (fold_stmt): Rename from ccp_fold. Work on a statement, not an + expression. + (get_rhs): New local function. + (set_rhs): New local function. + +2002-11-06 Daniel Berlin <dberlin@dberlin.org> + + * tree-flow.h: Prototype set_bb_for_stmt, last_stmt_ptr, + add_ephi_arg, num_ephi_args, set_ephi_arg, ephi_arg. + (enum tree_ref_type): Add E_LEFT, E_KILL, E_EXIT. + + * tree-cfg.c (set_bb_for_stmt): Move to tree-flow-inline.h. + (last_stmt_ptr): New function, gives pointer to last statement in + bb. + + * tree-flow-inline.h: Add exprref_processed, exprref_processed2, + expruse_phi, num_ephi_args, set_ephi_arg, ephi_arg, add_ephi_arg. + + * tree-dfa.c (tree_ref_structure): Handle E_{LEFT,KILL,EXIT}. + (ref_type_name): Ditto. + (tree_ref_size): Ditto. + (dump_ref): E_PHI's phi_args is now a varray of phi_arg structs. + (add_ephi_arg): New function. + (remove_ref_from_list): Fix crash when node not found. + (compute_may_aliases): Add timing for points-to analysis. + + * timevar.def: Add TV_TREE_PTA. + + * tree-ssa-pre.c: Start of massive cleanup and rewriting (in + preparation for load/store PRE). No more uses of ref_expr, proper + call handling. Started removing unnecessary structures and lists, + started removing redundant and inefficient operations (IE O(n^2) + loops to process all phi operands, etc). Basic load PRE implemented. + Code may look ugly due to large pieces commented out waiting for DFA + updating of refs to redo. + +2002-11-05 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (create_block_annotations): New local function. + (create_bb_ann): Remove. Update all users. + (parent_array): New local variable. + (build_tree_cfg): Initialize it. + Call create_block_annotations. + (create_bb): Call alloc_block instead of ggc_alloc to allocate + memory for basic blocks. + Don't call set_parent_block. + Grow array parent_array. + (dump_tree_cfg): Change meaning of second argument. Make it accept + any of the TDF_* flags defined in tree.h. + (delete_tree_cfg): Call free_aux_for_blocks. + Free array parent_array. + * tree-flow-inline.h (get_filename): New function. + (is_exec_stmt): return false if T is error_mark_node. + * tree-flow.h (struct var_ref_d): Mark alias_imm_rdefs field for + garbage collection. + (get_filename): Declare. + (struct bb_ann_d): Rename from bb_ann_def. + Remove garbage collection markers. + (referenced_vars): Mark for garbage collection. + (global_var): Likewise. + (create_bb_ann): Remove. + * tree-optimize.c (optimize_function_tree): Remove CFG and SSA + after debugging dumps. + + * diagnostic.h (print_generic_stmt): Rename from print_generic_tree. + Update all users. + (print_generic_expr): Rename from print_generic_node. Update all + users. + (PPF_BRIEF): Remove. Update all users. + (PPF_BLOCK): Remove. Update all users. + (PPF_LINENO): Remove. Update all users. + (PPF_IS_STMT): Remove. Update all users. + * flags.h (flag_dump_tree_all_ssa): Remove. Update all users. + * toplev.c (f_options): Remove entry for -fdump-tree-all-ssa. + Update all users. + * tree-dump.c (dump_enable_all): Rename from dump_enable_all_ssa. + Update all users. + (dump_files): Add entry for -fdump-tree-all. + (dump_option_value_info): Remove entries for TDF_REFS and + TDF_RDEFS. + Add entry for TDF_BLOCK. + (dump_switch_p): If -fdump-tree-all was given, call dump_enable_all. + * tree-pretty-print.c (PPF_BRIEF): Remove. Update all users. + (PPF_BLOCK): Remove. Update all users. + (PPF_LINENO): Remove. Update all users. + (PPF_IS_STMT): Remove. Update all users. + (dumping_stmts): New local variable. + (print_generic_stmt): Rename from print_generic_tree. Update all + users. + Set dumping_stmts to true. + (print_generic_expr): Rename from print_generic_node. Update all + users. + Set dumping_stmts to false. + (maybe_init_pretty_print): Set last_bb to -1. + (dump_block_info): If available, dump file and line number + information for the first statement in the basic block. + * tree-ssa.c (build_tree_ssa): Dump referenced variables and + reaching definition information if -details is given. + * tree.h (enum tree_dump_index): Rename TDI_all to TDI_tu. Update + all users. + Add new index TDI_all. + (TDF_DETAILS): Change value. + (TDF_REFS): Remove. Update all users. + (TDF_RDEFS): Remove. Update all users. + (TDF_BLOCK): Define. + * doc/invoke.texi: Update documentation for -fdump-tree-... flags. + +2002-11-05 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mudflap_enqueue_decl, _constant): Use + size_in_bytes, not c_size_in_bytes. + (mf_init_extern_trees): Import uintptr_t typedef node from + mf-runtime.h. + +2002-11-01 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (remove_tree_bb): Add new argument remove_stmts. + Update all callers. + (make_ctrl_stmt_edges): Add an edge to the body of a SWITCH_EXPR. + (make_cond_expr_edges): Don't try to linearize the if() subgraph. + (make_case_label_edges): Don't remove the fallthru edge from the + entry block to the switch() subgraph. + (cleanup_tree_cfg): Call cleanup_control_flow. + (remove_unreachable_blocks): Remove blocks of compound structures + before removing the entry block. + (remove_blocks): New local function. + (blocks_unreachable_p): New local function. + (is_nonlocal_label_block): New local function. + (find_subblocks): New local function. + (is_parent): New local function. + (gsi_remove): New function. + (remove_stmt): New local function. + (cleanup_control_flow): New local function. + (cleanup_cond_expr_graph): New local function. + (cleanup_switch_expr_graph): New local function. + (disconnect_unreachable_case_labels): New local function. + + * tree-dfa.c (remove_decl): New function. + (find_decl_location): New function. + + * tree-flow.h (gsi_remove): Declare. + (remove_decl): Declare. + (find_decl_location): Declare. + + * tree-ssa-ccp.c (optimize_unexecutable_edges): Remove. Update all + users. + (ssa_ccp_df_delete_unreachable_insns): Remove. Update all users. + (tree_ssa_ccp): Call print_generic_tree with PPF_BLOCK. + +2002-10-31 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (create_indirect_ref): New local function. + (find_refs_in_expr): Call it. + (create_ref): Check E_* reference types with == instead of &. + (dump_ref): Likewise. + (count_tree_refs): Likewise. + * tree-ssa.c (set_ssa_links): Update documentation comment for + save_chain. + +2002-10-31 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (remove_tree_bb): Don't walk beyond the end of the + basic block. + +2002-10-26 Daniel Berlin <dberlin@dberlin.org> + + * flags.h: Remove flag_tree_points_to from here. + * toplev.c: Include tree-alias-common.h. + (flag_tree_points_to): Now of type enum pta_type, rather than + int. + (lang_independent_options): Remove flag_tree_points_to. + (display_help): Display help for tree-points-to here. + (decode_f_option): Allow selecting of points-to algorithm. + * tree-alias-common.c (varmap): Removed. + (alias_annot): Changed to a hash table. Update all functions + appropriately. + (FIELD_BASED): New macro, switches between field-based analysis, + and field-independent analysis (field-based isn't quite done yet). + (alias_annot_entry): New, used in hash table. + (annot_eq): New function. + (annot_hash): New function. + (find_func_aliases): Handle casts, fix indendation. + (splaycount): Removed. + (splay_tree_count): Removed. + (display_points_to_set): Removed. + (splay_tree_size): Removed. + (alias_get_name): New function. + (ptr_may_alias_var): Globals are a bit funky to handle. + * tree-alias-steen.c: Use alias_get_name, rather than + print_generic_node. + (steen_simple_assign): Handle assignment of PTF's. + (test_assign): Remove. + * tree-alias-common.h (enum pta_type): New. + (alias_get_name): New. + (flag_tree_points_to): New. + +2002-10-26 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (cleanup_tree_cfg): Uncomment call to + compact_blocks. + +2002-10-26 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-pretty-print.o): Depend on $(TREE_FLOW_H) + * basic-block.h (BB_COMPOUND_ENTRY): Rename from BB_CONTROL_ENTRY. + * diagnostic.h (dump_generic_tree): Remove extern declaration. + (print_generic_node_brief): Remove. Update all users. + (PPF_BRIEF): Declare. + (PPF_BLOCK): Declare. + (PPF_LINENO): Declare. + (PPF_IS_STMT): Declare. + * tree-pretty-print.c (PPF_BRIEF): New constant. + (PPF_BLOCK): New constant. + (PPF_LINENO): New constant. + (PPF_IS_STMT): New constant. + (dump_block_info): New local function. + (last_bb): New local variable. + (dump_generic_tree): Remove unused function. + (print_generic_tree): Add third argument 'flags'. Update all + users. + (print_generic_node_brief): Remove. Update all users. + (print_generic_node): Add third argument 'flags'. Update all + users. + (dump_generic_node): Add third argument 'flags'. Update all users. + If PPF_BLOCK is set, display basic block information at basic block + boundaries. + If PPF_IS_STMT is set, change the way COMPOUND_EXPR nodes are + rendered. + If PPF_BRIEF is set, don't show the bodies of control statements. + (print_declaration): + + * toplev.c (process_options): Update comment for -fdisable-simple. + + * tree-cfg.c (remove_tree_bb): Rename from tree_delete_bb. + (latch_block): Move declaration to tree-flow.h. Declare extern. + (make_blocks): Start a new block after finding a control flow + altering statement. + (make_loop_expr_blocks): Set the loop entry block to be the parent + block for the loop latch block. + (cleanup_tree_cfg): Rename from tree_cleanup_cfg. + Call compact_blocks. + (remove_tree_bb): Rename from tree_delete_bb. Update all users. + (dump_tree_bb): Rename from dump_tree_bb. Update all users. + Dump information about loop latch blocks. + (debug_tree_bb): Rename from tree_debug_bb. Update all users. + (debug_tree_cfg): Rename from tree_debug_cfg. Update all users. + (dump_tree_cfg): Rename from tree_dump_cfg. Update all users. + By default, dump the function with markers for basic block + boundaries. + (successor_block): If we can't find a successor following the + parent chain, return the next block in the linked list of blocks. + Update documentation comments. + (stmt_starts_bb_p): Don't let RETURN_EXPR start a new block. + (is_latch_block): New function. + (first_exec_stmt): Don't treat BIND_EXPR nodes as a special case. + (first_stmt): Return NULL_TREE if the block does not exist. + (last_stmt): Likewise. + + * tree-dfa.c (find_tree_refs): Rename from tree_find_refs. Update + all users. + (find_refs_in_stmt): Handle BIND_EXPR nodes. + (rli_start): Move from tree-flow-inline.h + (rli_start_last): Likewise. + (rli_start_at): Likewise. + (rli_delete): Likewise. + + * tree-flow-inline.h (gsi_start_bb): Handle NULL blocks. + (ref_list_is_empty): New function. + * tree-flow.h (rli_start): Change declaration to extern. + (rli_start_last): Likewise. + (rli_start_at): Likewise. + (rli_delete): Declare. + (latch_block): Declare. + (is_latch_block): Declare. + (get_last_ref): Change to inline declaration. + (get_first_ref): Likewise. + (ref_list_empty): Declare. + + * tree-optimize.c (delete_tree_ssa): Remove declaration. + + * tree-ssa-dce.c (mark_control_parent_necessary): Call gsi_step_bb + instead of gsi_step. + (tree_ssa_eliminate_dead_code): Likewise. + + * tree-ssa.c (compute_tree_rdefs): Rename from compute_tree_rdefs. + Update all users. + +2002-10-22 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (struct dfa_stats_d): Add field size_tree_refs. + (tree_ref_size): New function. + (create_ref): Call it. + (dump_dfa_stats): Get total size from dfa_stats.size_tree_refs. + (count_tree_refs): Call tree_ref_size. + * tree-flow-inline.h (get_last_ref): New function. + (get_first_ref): New function. + * tree-flow.h (struct var_ref_d): Rename from var_ref. + (struct var_def_d): Rename from var_def. + (struct var_phi_d): Rename from var_phi. + (struct var_use_d): Rename from var_use. + (struct expr_phi_d): Rename from expr_phi. + (struct expr_use_d): Rename from expr_use. + * tree-ssa-ccp.c (tree_ssa_ccp): Call get_last_ref. + +2002-10-21 Daniel Berlin <dberlin@dberlin.org> + + * timevar.def: Add TV_TREE_{PRE,CCP,DCE,CFG,SSA}} timevars. + + * tree-optimize.c (optimize_function_tree): Push and pop timevars + for the tree optimizers. + +2002-10-21 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (OBJS): Move tree-mudflap.o ... + (C_AND_OBJC_OBJS): ... here. + +2002-10-21 Diego Novillo <dnovillo@redhat.com> + + * tree-flow-inline.h (rli_start): New function. + (rli_start_rev): New function. + (rli_start_at): New function. + (rli_after_end): New function. + (rli_step): New function. + (rli_step_rev): New function. + (rli_ref): New function. + * tree-flow.h (struct ref_list_iterator): Declare. + (FOR_REF_BETWEEN, FOR_EACH_REF, FOR_EACH_REF_REV): Replace with new + rli_* iterator functions. Update all users. + +2002-10-21 Frank Ch. Eigler <fche@redhat.com> + + * tree-cfg.c (make_blocks): Ignore TRY_FINALLY_EXPR and + TRY_CATCH_EXPR. + * tree-mudflap.c (mx_register_decls): Ignore local decls + of extern variables of unknown size. + +2002-10-20 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (repair_injury): DTRT, rather than abort. + + * tree-dfa.c (ref_type_name): E_* don't have these modifier + fields, but may have the same bits set, so don't print the + modifiers on them. + + * gimplify.c (create_tmp_var): New function, wraps calls to + create_tmp_var_1 with pushing/popping of right context. + All internal gimplify.c now use create_tmp_var_1. + (create_tmp_var_noc): New function, create the var without + pushing/popping, and without exposing internals of create_tmp_var_1. + Only one use of this. + + * tree-simple.h (create_tmp_var_noc): New prototype. + + * c-simplify.c (simplify_stmt_expr): create_tmp_var changed to + create_tmp_var_noc. + + * tree-ssa-pre.c: Add WAITING_FOR_DFA_UPDATE around code waiting for DFA + functions to keep refs up to date. + (add_call_to_ei): occurs and occurstmts is now an + array of tree pointers, not trees. Update approriately. + (insert_occ_in_preorder_dt_order_1): Ditto. + (tree_perform_ssapre): Ditto. + (find_use_for_var): Removed function. + (orig_expr_map): Removed global, removed uses. + (struct ei): Added injfixups member. + (is_strred_cand): STRIP_WFL the expression. + (calculate_increment): Ditto. + (is_injuring_def): Ditto. + (defs_y_dom_x): Ditto. Also account for fact that y is now a full + expression, not just an RHS. + (defs_match_p): Ditto (t2 is no longer just an RHS). + (finalize_1): Do insertion by replacement. + (repair_injury): Clean up, do insertion by replacement. + (find_reaching_def_of_var): Do backwards search in a cleaner way. + (update_ssa_for_new_use): Change how we do replacement. + (code_motion): Insertion by replacement. Print EXPR_WFL_LINENO, not + STMT_LINENO. + (pre_part_1_trav): Just create_tmp_var will now suffice. + +2002-10-18 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_refs_in_expr): Change type of second argument to + enum tree_ref_type. Add third argument ref_mod. Update all users. + (create_ref): Add third argument ref_mod. Decode bitmask to set + the individual bitfields in the new reference. + * tree-flow-inline.h (is_may_ref): New function. + (is_may_def): New function. + (is_may_use): New function. + (is_partial_ref): New function. + (is_partial_def): New function. + (is_partial_use): New function. + (is_volatile_ref): New function. + (is_volatile_def): New function. + (is_volatile_use): New function. + (is_default_def): New function. + (is_clobbering_def): New function. + (is_initializing_def): New function. + (is_relocating_def): New function. + (is_addressof_use): New function. + (is_pure_use): New function. + * tree-flow.h (V_DEF, V_USE, V_PHI, E_PHI, E_USE, E_KILL): Redefine + inside enum tree_ref_type. Update all users. + (enum tree_ref_type): Define. + (TRM_DEFAULT, TRM_CLOBBER, TRM_MAY, TRM_PARTIAL, TRM_INITIAL, + TRM_VOLATILE, TRM_RELOCATE): Rename from M_*. Update all users. + (struct tree_ref_common): Change type of field 'type' to enum + tree_ref_type. Update all users. + (struct var_ref): Add bitfields 'm_may', 'm_partial' and 'm_volatile'. + (struct var_def): Add bitfield 'm_default', 'm_clobber', 'm_initial' + and 'm_relocate'. + (struct var_use): Add bitfield 'm_addressof'. + (ref_type): Change return type to enum tree_ref_type. Update all + users. + (create_ref): Add new argument ref_mod. Update all users. + (function_may_recurse_p): Change return type to bool. Update all + users. + (ref_type_name): Change argument type to tree_ref. Update all + users. + (validate_ref_type): Remove. + +2002-10-18 Diego Novillo <dnovillo@redhat.com> + + * cp/Make-lang.in (CXX_C_OBJS): Remove tree-cfg.o, tree-dfa.o, + tree-optimize.o, tree-ssa.o, tree-ssa-pre.o, gimplify.o, tree-simple.o, + tree-alias-steen.o, tree-alias-ecr.o, tree-alias-type.o, + disjoint-set.o, tree-ssa-ccp.o, tree-dchain.o, tree-alias-common.o, + and tree-ssa-dce.o. + +2002-10-17 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (TREE_FLOW_H): Add bitmap.h, basic-block.h, + hard-reg-set.h and tree-simple.h. Update all users. + (C_AND_OBJC_OBJS): Move tree-cfg.o, tree-dfa.o, + tree-ssa.o, tree-optimize.o, c-simplify.o, c-call-graph.o, + tree-simple.o, simple-break-elim.o, simple-goto-elim.o, tree-dchain.o, + tree-ssa-pre.o, tree-alias-type.o, tree-mudflap.o, gimplify.o, + tree-alias-ecr.o, tree-alias-common.o, tree-alias-steen.o, + disjoint-set.o, tree-ssa-ccp.o and tree-ssa-dce.o ... + (OBJS): ... here. + (gimplify.o): Add dependency on $(TREE_FLOW_H). + (tree-pretty-print.o): New rule. + (GTFILES): Add tree-flow.h + * c-config-lang.in (gtfiles): Remove tree-flow.h + * c-simplify.c (copy_if_shared_r, unmark_visited_r, + unshare_all_trees, mark_not_simple): Move ... + * gimplify.c: ... here. + Include tree-flow.h + * tree-flow.h: Include hard-reg-set.h. + + * c-common.h (print_c_tree, print_c_node, print_c_node_brief, + debug_c_tree, debug_c_node, debug_c_node_brief): Move declarations + from diagnostic.h. + * c-call-graph.c (construct_call_graph): Call get_name. + (print_callee): Likewise. + * c-pretty-print.c (print_declaration): Declare static. + (print_function_decl): Likewise. + (print_struct_decl): Likewise. + (dump_c_tree): Likewise. + (dump_c_node): Likewise. + * diagnostic.h (dump_generic_tree, dump_generic_node, + print_generic_tree, print_generic_node, print_generic_node_brief): + Declare. + * tree-pretty-print.c: New file. + * c-decl.c: Replace calls to print_c_node with print_generic_node. + * tree-alias-common.c: Likewise. + * tree-alias-steen.c: Likewise. + * tree-cfg.c: Likewise. + * tree-dfa.c: Likewise. + * tree-mudflap.c: Likewise. + * tree-optimize.c: Likewise. + * tree-ssa-ccp.c: Likewise. + * tree-ssa-pre.c: Likewise. + * tree-ssa-dce.c: Likewise. + Don't include c-common.h nor c-tree.h + (tree_ssa_eliminate_dead_code): Don't call COMPOUND_BODY. + Replace ASM_STMT with ASM_EXPR. Don't check for EXPR_STMT. + +2002-10-17 Daniel Berlin <dberlin@dberlin.org> + Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (remove_bb_ann): Remove. Update all users. + (delete_tree_cfg): Set bb->aux to NULL in all basic blocks. + * tree-dfa.c: Remove extern declaration for tree_find_refs. + (create_ref_list): Allocate new list with ggc_alloc. + (empty_ref_list): Just set first and last element to NULL. + (delete_ref_list): Remove. Update all users. + (remove_ref_from_list): Don't call free. + (add_ref_to_list_begin): Allocate new node with ggc_alloc. + (add_ref_to_list_end): Likewise. + (add_ref_to_list_after): Likewise. + (create_ref): Call BITMAP_GGC_ALLOC. + (remove_tree_ann): Remove. Update all users. + (tree_ref_structure): New function. + * tree-flow.h (edge, basic_block): Forward declare if necessary. + (struct ref_list_node): Mark for garbage collection. + (struct ref_list_priv): Likewise. + (struct tree_ref_common): Likewise. + (struct var_ref): Likewise. + (struct var_def): Likewise. + (struct var_phi): Likewise. + (struct var_use): Likewise. + (struct phi_node_arg_d): Likewise. + (struct expr_ref_common): Likewise. + (struct expr_phi): Likewise. + (struct expr_use): Likewise. + (union tree_ref_d): Likewise. + (struct tree_ann_d): Likewise. + (struct bb_ann_def): Likewise. + (referenced_vars): Likewise. + (global_var): Likewise. + (enum tree_ref_structure_enum): New. + (call_sites): Remove unused function. + * tree-inline.c (copy_tree_r): Copy the 'ann' field from tree_common. + * old-tree-inline.c (copy_tree_r): Likewise. + * tree-ssa.c (added): Mark for garbage collection. + (in_work): Likewise. + (work_stack): Likewise. + (delete_tree_ssa): Set global_var to NULL_TREE. + * tree.h (struct tree_ann_d): Forward declare. + (struct tree_common): Rename field 'aux' to 'ann'. Update all + users. Don't mark it 'skip' for garbage collection. + +2002-10-16 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (compute_may_aliases): Call create/delete_alias_vars + if flag_tree_points_to is on. + (may_alias_p): Use points-to info if user asked us to generate it. + + * tree-optimize.c (optimize_function_tree): Don't call + create_alias_vars here. + +2002-10-16 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (make_cond_expr_edges): If the conditional has known + value, only make the edge to the corresponding branch. + (tree_delete_bb): Write a warning to the dump file when removing + blocks with executable statements. + (first_exec_stmt): Skip over empty BIND_EXPR blocks. + + * tree-dfa.c (find_refs_in_expr): Don't look for references in non + GIMPLE statements. + (remove_tree_ann): Clear the annotation with memset. + (collect_dfa_stats_r): Don't call tree_annotation. + (find_may_aliases_for): Avoid adding the same alias more than once. + (may_alias_p): Fix comment grammar. + + * tree-flow-inline.h (is_exec_stmt): New function. + * tree-flow.h (FOR_EACH_REF): Guard against NULL lists. + (FOR_EACH_REF_REV): Likewise. + (is_exec_stmt): Declare. + + * tree-ssa-ccp.c (visit_phi_node): Reformat debug dumping output. + (visit_expression_for): Move check for clobbering definitions + before check for NULL expressions. + (visit_condexpr_for): Reformat debug dumping output. + (set_lattice_value): Remove stale comments. + (replace_uses_in): Don't clear TF_FOLDED flag from expression. + + * tree-ssa.c (add_phi_node): If possible, associate the PHI node to + a statement. + (create_default_def): Create initial declarations for static + variables with DECL_INITIAL set. + (delete_tree_ssa): Remove annotations from variables. + +2002-10-16 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-type.c (alias_tvar_new_with_aterm): New function. + Update all allocations to allocate right type, rather than the union. + Update to use macros to access members of alias_typevar. + + * tree-alias-type.h: Split alias_typevar into a common, an ECR, and + an aterm, update all users. + Add macros to access members of union. + + * tree-alias-common.c (create_alias_var): Handle function_decl's + properly (needed for proper handling of function pointers). + Updates for macros to access typevars. + Fix some indentation. + + * tree-alias-steen.c: Updates for macros to access typevars. + +2002-10-16 Frank Ch. Eigler <fche@redhat.com> + + * c-decl.c (c_expand_body): Enable mudflap, only for gimple. + * c-pretty-print.c (dump_c_node): Render try/catch/finally exprs. + (op_prio): Accept BIND_EXPRs. + * gcc.c (cpp_unique_options): Make -fmudflap -include mf-runtime.h. + * toplev.c (process_options): Complain on -fmudflap -fdisable-simple. + * tree-mudflap.c (*): Reorganize for generic/gimple operation. + (mf_init_extern_trees): Extract decl nodes from -include'd file. + (mf_external_ref, mf_decl_extern_trees): Removed; updated callers. + (mf_offset_expr_of_array_ref): Don't bother store index type as + TREE_PURPOSE. + (mf_build_check_statement_for): Use GIMPLE tree types and builders. + (mx_register_decls): New function, replacing mx_register_decl. + (mx_xfn_xform_decls): Support only GIMPLE input tree types. + (mf_flush_enqueued_calls): Clean up enqueued call statements. + +2002-10-14 Diego Novillo <dnovillo@redhat.com> + + * toplev.c (parse_options_and_default_flags): Undo local + hack that slipped in the previous commit. + +2002-10-14 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (c-decl.o): Add dependency on diagnostic.h. + * c-decl.c: Include diagnostic.h + (c_expand_body): Call get_name. + + * basic-block.h (struct basic_block_def): Rename head_tree to + head_tree_p and end_tree to end_tree_p. Change type to tree *. + Update all users. + (BLOCK_HEAD_TREE): Remove. Update all users. + (BLOCK_END_TREE): Remove. Update all users. + * tree-cfg.c (build_tree_cfg): Return if function body is empty. + (make_blocks): Change first argument to tree *. Update all users. + (make_bind_expr_blocks): Likewise. + (make_loop_expr_blocks): Likewise. + (make_cond_expr_blocks): Likewise. + (make_switch_expr_blocks): Likewise. + (create_bb): Likewise. + (first_exec_block): Likewise. + (first_exec_stmt): Likewise. + (tree_delete_bb): Use a gimple statement iterator to unmap + statements. + (insert_stmt_before): Remove empty function. + (replace_expr_in_tree): Remove. Update all users. + (find_expr_in_tree_helper): Likewise. + (find_expr_in_tree): Likewise. + (first_stmt): Call STRIP_NOPS. + (last_stmt): Call STRIP_NOPS. + + * tree-dfa.c (struct clobber_data_d): Rename parent_stmt to + parent_stmt_p and parent_expr to parent_expr_p. Change types to + tree *. Update all users. + (find_refs_in_stmt): Change first argument type to tree *. Update + all users. + (find_refs_in_expr): Chnage arguments parent_stmt and parent_expr + to tree *. Update all users. + (create_ref): Don't add the same reference twice on the same list + when parent_stmt and parent_expr are the same node. + Don't set output_ref when the parent statement is not in GIMPLE + form. + (replace_ref_operand_with): Move from tree-flow-inline.h + (replace_ref_expr_with): New function. + (replace_ref_stmt_with): New function. + (create_tree_ann): Abort if trying to annotate certain nodes. + Don't create an empty ref list. + In the presence of WFL or NOPS wrappers, add the annotation to the + inner node. + (dump_ref): Don't call tree_annotation to access the tree + annotation. + + * tree-flow.h (struct tree_ref_common): Rename field stmt to stmt_p + and field expr to expr_p. Change types to tree *. Update all + users. + (replace_ref_expr_with): Declare. + (replace_ref_stmt_with): Declare. + (insert_stmt_before, insert_stmt_after, replace_expr_in_tree, + find_expr_in_tree): Remove. + * tree-flow-inline.h (ref_expr): Return NULL_TREE if expr_p is + NULL. + (ref_stmt): Return NULL_TREE if stmt_p is NULL. + (tree_annotation): Call STRIP_WFL and STRIP_NOPS before returning + the annotation. + (add_tree_ref): Remove consistency checks. Create an empty list + the first time. + (get_lineno): Return -1 on NULL_TREE. + (set_output_ref): Remove consistency. + (set_tree_flag): Likewise. + (clear_tree_flag): Likewise. + (reset_tree_flags): Likewise. + * tree-simple.h (gimple_stmt_iterator): Rename ptr to tp. Change + type to tree *. Update all users. + (gsi_start): Change argument type to tree *. Update all users. + (gsi_stmt_ptr): New function. + (gsi_container): New function. + + * tree-optimize.c (optimize_function_tree): Don't test fnbody for + NULL. + Re-enable optimizers. + * tree-ssa-ccp.c: Update documentation comments. + Don't include c-common.h and c-tree.h. + (tree_ssa_ccp): Don't call COMPOUND_BODY. + (ccp_fold): New private function. + (substitute_and_fold): Call it. + Call replace_ref_expr_with. + Set TF_FOLDED flag on the statement, not the expression. + (visit_assignment_for): Call STRIP_NOPS and STRIP_WFL. + (evaluate_expr): Call ccp_fold. Only use the RHS of the simplified + value in the case of MODIFY_EXPR or INIT_EXPR. + (restore_expr): + * tree-ssa-dce.c (mark_control_parent_necessary): Use a gimple + iterator. + (tree_ssa_eliminate_dead_code): Likewise. + * tree-ssa-pre.c: Disable and add warning comments for out-of-date + calls to create_ref, find_refs_in_stmt and replace_expr_in_tree. + +2002-10-12 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-type.h (alias_typevar_def): Add struct aterm + as a temporary hack for andersen's analysis. + * tree-alias-common.c (current_alias_ops): New, use it + instead of referring to steen_alias_ops everywhere. + (get_alias_var): Use STRIP_WFL. + (find_func_aliases): Ditto. + (create_alias_vars): Call init function, move deletion to + delete_alias_vars. + (delete_alias_vars): New function, move deletion code to here. + (get_virtual_var): Removed. + (ptr_may_alias_var): New function. + * tree-alias-common.h (struct tree_alias_ops): Add may_alias + function. + * tree-alias-steen.c (steen_may_alias): New function. + +2002-10-10 Falk Hueffner <falk.hueffner@student.uni-tuebingen.de> + + * diagnostic.h (dump_c_tree, dump_c_node, + print_declaration, print_function_decl, + print_struct_decl): Fix argument types. + +2002-10-10 Diego Novillo <dnovillo@redhat.com> + + * tree.h (struct tree_common): Rename field unused_0 to + not_gimple_flag. + (TREE_NOT_GIMPLE): Define. + * c-simplify.c (mark_not_simple_r): Remove. Update all users. + (mark_not_simple): Set TREE_NOT_GIMPLE. + * gimplify.c (simplify_call_expr): Enable call to mark_not_simple. + * tree-flow.h (TF_NOT_SIMPLE): Remove. Update all users. + + * tree-cfg.c (build_tree_cfg): Rename from tree_find_basic_blocks. + Update all users. + Find the first executable statement before starting basic block 0. + (make_blocks): Do not accept TRY_FINALLY_EXPR and TRY_CATCH_EXPR + nodes. + (make_edges): Always create an edge from entry to basic block 0. + (delete_tree_cfg): Rename from delete_cfg. Update all uses. + (first_exec_stmt): Return the container for the first statement, + not the statement itself. + + * tree-dfa.c (tree_find_refs): Re-implement using a GIMPLE + iterator. + (find_refs_in_stmt): Handle GIMPLE statements. + (find_refs_in_expr): Call flags_from_decl_or_type when handling + CALL_EXPR expressions. + (create_ref): Call DECL_P. + (remove_tree_ann): Call tree_annotation. + + * tree-flow-inline.h (gsi_step_bb): Stop if statement is not inside + a basic block. + + * tree-flow.h (build_tree_cfg): Rename from tree_find_basic_blocks. + Update all users. + (delete_tree_cfg): Rename from delete_cfg. + (tree_find_refs): Declare. + (build_tree_ssa): Rename from tree_build_ssa. + (is_upward_exposed): Remove unused function. + * tree-optimize.c (delete_tree_ssa): Remove declaration. + (optimize_function_tree): Re-enable SSA builder. + * tree-simple.h (gsi_container): New function. + + * Makefile.in (tree-ssa.o): Remove dependencies on c-common.h and + c-tree.h. + * tree-ssa.c: Don't include c-common.h nor c-tree.h. + (tree_find_refs): Remove declaration. + (remove_annotations_r): New local function. + (build_tree_ssa): Rename from tree_build_ssa. Update all users. + (analyze_rdefs): Don't call prep_stmt. + (is_upward_exposed): Remove unused function. + (add_phi_node): Don't associate the PHI node to a statement. + (delete_tree_ssa): Receive the function body as argument. + Walk the function body removing annotations from every tree. + +2002-10-10 Steven Bosscher <s.bosscher@student.tudelft.nl> + + * tree-ssa-dce (tree_ssa_eliminate_dead_code): Initialize prev to + NULL_TREE. + Don't close dump_file until end of function. + Dump the tree after DCE for -fdump-tree-dce. + +2002-10-08 Richard Henderson <rth@redhat.com> + Jason Merrill <jason@redhat.com> + Diego Novillo <dnovillo@redhat.com> + + * tree-simple.h (gimple_stmt_iterator): New type. + (gsi_start): New function. + (gsi_after_end): New function. + (gsi_step): New function. + (gsi_stmt): New function. + +2002-10-08 Diego Novillo <dnovillo@redhat.com> + + * calls.c (flags_from_decl_or_type): Make extern. + (ECF_*): Move ... + * rtl.h (ECF_*): ... here. + (flags_from_decl_or_type): Declare. + + * tree.h (COND_EXPR_COND): Define. + (COND_EXPR_THEN): Define. + (COND_EXPR_ELSE): Define. + (LABEL_EXPR_LABEL): Define. + (optimize_function_tree): Declare. + +2002-10-08 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (TREE_FLOW_H): Define. + (c-decl.o): Remove dependency on tree-optimize.h. + (tree-alias-steen.o, tree-alias-common.o, tree-ssa.o, tree-ssa-pre.o, + tree-cfg.o, tree-dfa.o, tree-optimize.o, c-simplify.o, c-call-graph.o, + tree-ssa-dce.o, tree-ssa-ccp.o): Depend on $(TREE_FLOW_H). + (tree-cfg.o): Remove dependencies on c-tree.h and c-common.h. + * c-call-graph.c (construct_call_graph): Disable calls to removed + functions. + * c-decl.c: Don't include tree-optimize.h. + (c_expand_body): Enable calls to optimize_function_tree. + + * c-pretty-print.c (dump_c_node): Fix printf warnings. + Only dump the first node of a COMPOUND_EXPR when brief_dump is set. + Use COND_EXPR_COND, COND_EXPR_THEN and COND_EXPR_ELSE accessors. + Only dump the opening brace of a BIND_EXPR when brief_dump is set. + + * tree-cfg.c: Don't include tree-optimize.h, c-common.h and c-tree.h. + (binding_stack, make_for_stmt_blocks, make_if_stmt_blocks, + make_while_stmt_blocks, make_switch_stmt_blocks, + make_do_stmt_blocks, create_maximal_bb, make_for_stmt_edges, + make_while_stmt_edges, make_do_stmt_edges, make_if_stmt_edges, + make_break_stmt_edges, make_continue_stmt_edges, create_loop_hdr, + insert_before_ctrl_stmt, insert_before_normal_stmt, + insert_after_ctrl_stmt, insert_after_normal_stmt, + insert_after_loop_body, tree_split_bb, stmt_ends_bb_p): Remove. + Update all users. + (STRIP_CONTAINERS): Define. + (make_bind_expr_blocks): New local function. + (make_cond_expr_blocks): New local function. + (make_loop_expr_blocks): New local function. + (make_switch_expr_blocks): New local function. + (make_loop_expr_edges): New local function. + (make_cond_expr_edges): New local function. + (make_case_label_edges): New local function. + (first_exec_block): New local function. + (make_goto_expr_edges): Rename from make_goto_stmt_edges. + (make_blocks): Remove arguments COMPOUND_STMT and PREV_CHAIN_P. + Use gimple_stmt_iterator to iterate over the statements in the + function. Create maximal basic blocks during traversal. + (create_bb): Remove arguments end, prev_chain_p and binding_scope. + Rename control_parent to parent_block. + (set_bb_for_stmt): Move from tree-flow.h. + (make_edges): Don't assume that basic block 0 contains executable + statements. + Handle BIND_EXPR nodes. + (make_ctrl_stmt_edges): Handle LOOP_EXPR, COND_EXPR and + SWITCH_EXPR. + (make_exit_edges): Handle GOTO_EXPR, CALL_EXPR and RETURN_EXPR. + (tree_delete_bb): Call first_stmt and last_stmt. + (block_invalidates_loop): Call last_stmt. + (replace_expr_in_tree): Don't dump line number information. + (find_expr_in_tree_helper): Don't call statement_code_p. + (tree_dump_bb): Call get_lineno. + (tree_cfg2dot): Ditto. + (successor_block): Use a gimple_stmt_iterator to find the first + executable block after the current one. + (is_ctrl_stmt): Handle COND_EXPR, LOOP_EXPR and SWITCH_EXPR. + (is_ctrl_altering_stmt): Call flags_from_decl_or_type to discover + non-return functions. + (is_loop_stmt): Handle LOOP_EXPR. + (is_computed_goto): Handle GOTO_EXPR. + (stmt_starts_bb_p): Handle CASE_LABEL_EXPR, LABEL_EXPR, RETURN_EXPR + and BIND_EXPR. + (first_exec_stmt): Use a gimple_stmt_iterator to traverse the + statements. + (first_stmt): New function. + (last_stmt): New function. + + * tree-dfa.c: Don't include c-common.h, c-tree.h and + tree-optimize.h. Include diagnostic.h. + (tree_find_refs): Disable. + (find_refs_in_stmt): Disable. + (find_refs_in_expr): Don't call prep_stmt. + (tree_ann): Don't annotate empty_stmt_node. + (find_declaration): Remove. Update all users. + (dump_ref): Call get_lineno. + (is_visible_to): Always return true. + + * tree-flow.h: Include tree-flow-inline.h, basic-block.h and + tree-simple.h. + (tree_ann_d): Remove compound_parent field. + (set_bb_for_stmt): Declare extern. + (compound_parent, set_compound_parent, struct for_header_blocks, + union header_blocks, prev_chain_p, set_prev_chain_p, binding_scope, + set_binding_scope, loop_hdr, for_init_bb, set_for_init_bb, + for_cond_bb, set_for_cond_bb, for_expr_bb, set_for_expr_bb, + end_while_bb, set_end_while_bb, do_cond_bb, set_cond_bb, + stmt_ends_bb_p, loop_parent, latch_block, switch_parent, + first_exec_stmt, last_exec_stmt, is_exec_stmt, + is_statement_expression, first_non_decl_stmt, first_decl_stmt, + first_non_label_in_bb, tree_split_bb, find_declaration): Remove. + Update all users. + (get_lineno): New function. + (struct bb_ann_def): Rename field parent to parent_block. Update + all users. + Remove fields prev_chain_p, loop_hdr and binding_scope. Update all + users. + (parent_block): Rename from bb_parent. + (set_parent_block): Rename from set_bb_parent. + (prev_chain_p): Remove + (bb_empty_p): Return true if block only contains empty_stmt_node. + (gsi_step_bb): New function. + (gsi_start_bb): New function. + (gsi_insert_before, gsi_insert_after, gsi_delete, gsi_replace): + Declare. + (insert_stmt_before): Rename from insert_stmt_tree_before. + (insert_stmt_after): Rename from insert_stmt_tree_after. + (first_stmt): Declare. + (last_stmt): Declare. + (tree_perform_ssapre, tree_ssa_ccp, + tree_ssa_eliminate_dead_code): Move declaration from tree-optimize.h. + * tree-flow-inline.h: New file for all the inline functions + declared in tree-flow.h + + * tree-optimize.c: Don't include tree-optimize.h, c-common.h and + c-tree.h. + (optimize_function_tree): Disable call to double_chain_stmts. + Call init_flow. + Call tree_find_basic_blocks. + Disable calls to tree_build_ssa and optimizers. + (build_tree_ssa): Remove. Update all users. + * tree-optimize.h: Remove. + * tree-ssa-ccp.c: Don't include tree-optimize.h + * tree-ssa-dce.c: Don't include tree-optimize.h. + Include diagnostic.h + * tree-ssa-pre.c: Don't include tree-optimize.h. + (requires_edge_placement): Disable unused function. + (set_need_repair): Disable unused function. + (finalize_1): Disable calls to insert_stmt_tree_before and + insert_stmt_tree_after. + (repair_injury): Ditto. + (code_motion): Ditto. + * tree-ssa.c: Don't include tree-optimize.h. + (insert_phi_nodes_for): Remove unused variable. + (add_phi_node): Don't call statement_code_p. + * cp/optimize.c: Don't include tree-optimize.h + * tree-alias-common.c: Don't include tree-optimize.h. + (find_func_decls): Disable. + (display_points_to_set): Disable. + * tree-alias-steen.c: Don't include tree-optimize.h. + +2002-10-04 Jason Merrill <jason@redhat.com> + + * gimplify.c (declare_tmp_vars): Don't add temps to block vars. + * tree-inline.c (remap_decls): Split out from remap_block. + (copy_bind_expr): Remap BIND_EXPR_VARS separately from block vars. + + * c-simplify.c (simplify_expr_stmt): Call set_file_and_line_for_stmt. + + * gimplify.c: New file. + (push_gimplify_context, pop_gimplify_context): New fns. + (gimple_push_bind_expr, gimple_pop_bind_expr): New fns. + (simplify_bind_expr): Use them. + (gimple_current_bind_expr, gimple_add_tmp_var): New fn. + (foreach_stmt): Recurse if necessary. + (various): Use generic interfaces instead of c-specific ones. + * c-simplify.c: Move language-independent code to gimplify.c. + (simplify_c_loop): Use add_tree instead of add_stmt_to_compound. + (various): Use new *_bind_expr interfaces. + * Makefile.in (C_AND_OBJC_OBJS): Add gimplify.o. + (gimplify.o): New rule. + + * c-decl.c (c_expand_body): Dump trees here. + * c-simplify.c (simplify_function_body): Not here. + +2002-10-03 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_offset_expr_of_array_ref): Don't emit + intermediate variables for constant index values. + (mx_xfn_indirect_ref): For constant valid index values and + known valid array sizes, omit bounds checks. + +2002-10-03 Jason Merrill <jason@ariel.home> + + * c-simplify.c (simplify_bind_expr): Don't clear TREE_SIDE_EFFECTS + if we have a block. + + * c-simplify.c (simplify_expr) [TRY_FINALLY_EXPR]: New case. + + * tree-inline.c (copy_body_r) [RETURN_EXPR]: Don't make an extra + copy of the MODIFY_EXPR. Mark the return label used. + (expand_call_inline): Don't push/pop_srcloc. Only emit the return + label if it was used. + + * tree-simple.c (right_assocify_expr): Split out from + rationalize_compound_expr. Don't move non-matching op0's. + * tree-simple.h: Declare it. + * c-simplify.c (simplify_boolean_expr): Call it. + (simplify_cond_expr): Reorganize. Optimize if (a&&b). + + * c-simplify.c (wrap_with_wfl): Drop special loop handling. + (simplify_c_loop): Wrap loop contents in wfls. + + * c-simplify.c (STRIP_WFL): Move... + * tree.h: ...here. + + * c-common.c (c_walk_subtrees): Don't walk TREE_CHAIN. + * tree-inline.c (walk_tree): Call langhook walk_subtrees first. + For expressions, walk TREE_CHAIN if it matters. + +2002-10-01 Frank Ch. Eigler <fche@redhat.com> + + * builtins.c (expand_builtin_alloca): Disable if -fmudflap. + * tree-mudflap.c (mudflap_enqueue_decl): Tweak logic to include + more globals. + (mx_xfn_indirect_ref): Handle bitfield COMPONENT_REFs; instrument + BIT_FIELD_REF/INDIRECT_REFs. + +2002-10-01 Jason Merrill <jason@redhat.com> + + * c-decl.c (poplevel): Only add undeclared labels to the toplevel + block. + * c-parse.in (label_decl): Push the declared label. + + * c-decl.c (c_expand_body): If we've been simplified, use + expand_expr_stmt_value instead. + + * c-decl.c (c_expand_decl): Rename from c_expand_decl_stmt. + Handle all C-specific expansion semantics. + * c-tree.h: Change prototype. + * langhooks.h (struct lang_hooks): Add expand_decl hook. + * langhooks.c (lhd_expand_decl): Default version. + * langhooks-def.h (LANG_HOOKS_EXPAND_DECL): Provide default. + * c-lang.c (LANG_HOOKS_EXPAND_DECL): Define. + * c-semantics.c (lang_expand_decl_stmt): Remove. + (genrtl_decl_stmt): Use lang_hooks.expand_decl. + * Makefile.in (c-semantics.o): Depend on langhooks.h. + * c-objc-common.c (c_objc_common_init): Don't set + lang_expand_decl_stmt. + + * c-common.def (ASM_STMT): Only 4 operands. + * c-common.h (ASM_CV_QUAL): Remove. + (genrtl_asm_stmt): Adjust prototype. + * c-typeck.c (build_asm_stmt): Adjust. + * c-semantics.c (genrtl_asm_stmt): Change cv_qualifier parm to + volatile_p. + (expand_stmt): Adjust. + + * c-common.h (SWITCH_COND, SWITCH_BODY, CASE_LOW, CASE_HIGH, + CASE_LABEL_DECL, GOTO_DESTINATION, ASM_STRING, ASM_OUTPUTS, + ASM_INPUTS, ASM_CLOBBERS, ASM_VOLATILE_P, ASM_INPUT_P): Move to tree.h. + + * c-pretty-print.c (newline_and_indent): New fn. + (dump_c_tree, dump_c_node): Make spc a plain int. + (dump_c_node): Use output_add_identifier. + Reorganize for bnw-simple; indent in the enclosing node rather + than the subexpression. + [FUNCTION_DECL]: Just print the name for now. + [COMPOUND_EXPR, COND_EXPR]: Handle use as statements. + [BIND_EXPR, GOTO_EXPR, EXIT_EXPR, LOOP_EXPR, LABELED_BLOCK_EXPR, + EXIT_BLOCK_EXPR, RETURN_EXPR, SWITCH_EXPR, ASM_EXPR, + CASE_LABEL_EXPR]: Implement. + (print_declaration): Print 'static'. + * c-tree.h: Move c-pretty-print decls to diagnostic.h. + + * expr.c (store_field): Don't always pass want_value==0 to store_expr. + + * expr.c (expand_expr) [EXIT_EXPR]: Handle EXIT_EXPR_IS_LOOP_COND. + + * expr.c (expand_expr) [LOOP_EXPR]: Pass exit_flag==0 to + exand_start_loop. + [BIND_EXPR]: Adjust for functions-as-trees mode. + [COMPOUND_EXPR]: Avoid recursion if possible. + [SWITCH_EXPR, LABEL_EXPR]: Move handling from java/expr.c. + [CASE_LABEL_EXPR, ASM_EXPR]: New handling. + + * tree.h (struct tree_common): Add visited flag. + (TREE_VISITED): New macro. + * tree.c (copy_node): Clear TREE_VISITED. + * print-tree.c (print_node): Print visted. + + * stmt.c (expand_asm_expr): New fn. + + * tree.c (build1): Always set TREE_SIDE_EFFECTS for 's' codes. + + * tree.h (enum tree_index): Add TI_EMPTY_STMT. + (empty_stmt_node): New macro. + * tree.c (build_common_tree_nodes_2): Initialize it. + + * tree.def: Change some codes from 'e' to 's'. + (CASE_LABEL_EXPR, ASM_EXPR): New codes. + + * tree.def (SWITCH_EXPR): Now has three operands. + + * tree-inline.c: Retarget to generic trees. FIXME FIXME. + * old-tree-inline.c: Old C/Java-specific inliner. + * Makefile.in (old-tree-inline.o): New rule. + * c-common.c (c_walk_subtrees): New fn. + (c_tree_chain_matters_p): New fn. + * c-lang.c: Use them for LANG_HOOKS_TREE_INLINING_WALK_SUBTREES + and LANG_HOOKS_TREE_INLINING_TREE_CHAIN_MATTERS_P. + * c-common.h: Declare them. + (DECL_NUM_STMTS): Move to tree.h. + * c-decl.c (finish_function): Simplify the function trees. + * c-objc-common.c (inline_forbidden_p): Look inside BIND_EXPRs + for nested functions. Don't inline a function with _STMT trees. + + * basic-block.h: Include hard-reg-set.h. + + * c-decl.c (start_function): Don't call make_decl_rtl. + (c_expand_body): Call it here instead. + + * Makefile.in (explow.o): Depend on langhooks.h. + + * unroll.c (copy_loop_body): Don't copy NOTE_INSN_DELETED_LABELs + between copy_notes_from and loop_end, either. + +2002-09-30 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (repair_injury): Start work on updating SSA + representation for strength reduction injuries. + Print a new line after outputting tree node in debug statements. + Fix strength reduction of a candidate with two variables (IE a * + c). + Put the repair after the injuring statement, not at the end of the + block. + Break the RHS use lookup if it's defined by a phi. + (calculate_increment): Ditto on node printing. + (code_motion): Ditto on updating SSA rep for strength reduction + injuries. + (find_rhs_use_for_var): Rewrite to use maybe_find_rhs_use_for_var. + (maybe_find_rhs_use_for_var): Rename from find_rhs_use_for_var, + don't abort, return NULL. + (set_var_phis): Simplify break condition. + Make sure RHS *has* a use before we go and get it. + (rename2): Ditto on RHS checking. + When looking up injuring defs, break on phis. + (phi_opnd_from_res): Ditto. + (defs_y_dom_x): Ditto. + (TODO List): Add new TODO to fix the remapping crud. + +2002-09-27 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (tree_perform_ssapre): Move insertion into + splay tree inside the is_simple_modify_expr block, to prevent + tree check failure. + +2002-09-26 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (update_phis_in_list): New function. + (update_ssa_for_new_use): New function. + (code_motion): Start working on code to update SSA representation. + (find_reaching_def_of_var): New function. + +2002-09-25 Steven Bosscher <s.bosscher@student.tudelft.nl> + + * Makefile.in (tree): Add dependency on c-tree.h + * tree-optimize.c: Include c-tree.h + (optimize_function_tree): React to -fdump-tree-optimized. + +2002-09-25 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (add_list_to_ref_list_end): New function. + (add_list_to_ref_list_begin): Ditto. + (find_list_node): Handle searching in empty lists. + (find_refs_in_stmt): De-staticify. + + * tree-flow.h (add_list_to_ref_list_end): New declaration. + (add_list_to_ref_list_begin): Ditto. + (find_refs_in_stmt): Add prototype. + +2002-09-25 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-dfa.o): Depend on flags.h + * tree-cfg.c (tree_dump_cfg): Alter output format slightly. + (block_invalidates_loop): Look for clobbering definitions of + GLOBAL_VARIABLE. + * tree-simple.c (get_base_symbol): Handle EXPR_WITH_FILE_LOCATION + nodes. + * tree-optimize.c (init_tree_flow): Remove. Update all users. + (build_tree_ssa): Don't call tree_find_refs. + Don't call tree_compute_rdefs. + + * tree-dfa.c: Include flags.h + (dump_file): Remove. + (dump_flags): Remove. + (pointer_refs): Remove. + (struct dfa_stats_d): Add fields max_num_phi_args, num_may_alias, + max_num_may_alias, num_alias_imm_rdefs and max_num_alias_imm_rdefs. + Remove field num_fcalls. + (dfa_counts): Declare. + (tree_find_refs): Declare. + (tree_ssa_dump_file): Declare. + (tree_ssa_dump_flags): Declare. + (dump_if_different): New function. + (add_default_defs): Remove. Update all users. + (add_call_site_clobbers): Remove. Update all users. + (add_ptr_may_refs): Remove. Update all users. + (compute_may_aliases): New function. + (find_may_aliases_for): New function. + (add_may_alias): New function. + (may_alias_p): New function. + (is_visible_to): New function. + (get_alias_index): New function. + (call_sites): Remove. Update all users. + (global_var): Declare. + (E_FCALL): Remove. Adjust other constants. + (M_INDIRECT): Remove. Update all users. + (M_RELOCATE): Declare. + (tree_find_refs): Move debugging dumps to tree_build_ssa. + Move initialization code to init_tree_ssa. + Call compute_may_aliases. + (find_refs_in_expr): For INDIRECT_REF nodes create a reference to + the canonical INDIRECT_REF node associated with the pointer symbol. + Given a pointer p, clobber the canonical INDIRECT_REF of p after + creating a V_DEF for p. + For CALL_EXPR nodes, if the called function is not pure nor + const, create a use and a clobbering definition to GLOBAL_VAR. + (create_ref): Allow INDIRECT_REF variables. + (add_phi_arg): Keep track of number of PHI arguments created. + (function_may_recurse_p): Look for clobbering definitions to + GLOBAL_VAR. + (get_fcalls): Remove unused function. + (is_pure_fcall): Remove unused function. + (fcall_takes_ref_args): Remove unused function. + (find_declaration): Stop iterating at ENTRY_BLOCK_PTR. + (debug_variable): New function. + (dump_variable): New function. + (dump_referenced_vars): Call it. + (dump_phi_args): Don't dump NULL arguments. + (PERCENT): Define. + (dump_dfa_stats): Re-format output. + Add new counters. + Call dump_if_different. + (collect_dfa_stats): Also recurse into GLOBAL_VAR. + (collect_dfa_stats_r): Collect may-alias information. + (count_tree_refs): Collect information about def-def links for + aliases. + Keep track of maximum values for number of PHI arguments, aliases + and def-def links. + (ref_type_name): Handle M_RELOCATE. + (validate_ref_type): Ditto. + + * tree-ssa.c: Add more documentation. + (tree_ssa_dump_file): Rename from dump_file. Declare extern. + (tree_ssa_dump_flags): Rename from dump_flags. Declare extern. + (added): New local varray. + (in_work): New local varray. + (work_stack): New local varray. + (dfa_counts): Declare. + (insert_phi_nodes_for): New local function. + (add_phi_node): New local function. + (set_ssa_links): New local function. + (set_alias_imm_reaching_def): New local function. + (create_default_def): New local function. + (init_tree_ssa): New local function. + (tree_find_refs): Relocate declaration from tree-flow.h + (tree_build_ssa): Call init_tree_ssa. + Call tree_find_refs. + Process all SSA-related dump options. + (insert_phi_nodes): Rename from insert_phi_terms. Update all + users. + Call insert_phi_nodes_for. + (build_fud_chains): Add more documentation. + Initialize save_chain to 0. + (search_fud_chains): Add more documentation. + Call set_ssa_links. + Call create_default_def. + (tree_compute_rdefs): Initialize array marked to 0. + (follow_chain): Follow def-def chains for non-killing definitions + for aliases. + (dump_reaching_defs): Call dump_variable. + + * tree-flow.h (E_FCALL): Remove. Update all users. + (M_INDIRECT): Remove. Update all users. + (M_RELOCATE): Declare. + (struct var_ref): Add field alias_imm_rdefs. + (alias_imm_reaching_def): New inline function. + (struct tree_ann_d): Add field indirect_var. + Add field may_aliases. + (enum tree_flags): Relocate. + (indirect_var): New inline function. + (set_indirect_var): New inline function. + (may_alias): New inline function. + (num_may_alias): New inline function. + (struct dfa_counts_d): Declare. + (global_var): Declare. + (FCALL_NON_PURE, FCALL_PURE, FCALL_BUILT_IN): Remove. + (tree_find_refs): Move to tree-ssa.c. + (dump_variable): Declare. + (debug_variable): Declare. + (get_fcalls): Remove. + (is_pure_fcall): Remove. + (fcall_takes_ref_args): Remove. + (ref_defines): Declare. + (is_killing_def): Declare. + (get_alias_index): Declare. + (delete_tree_ssa): Rename from delete_ssa. Update all users. + (set_currdef_for): Allow INDIRECT_REF nodes. + (bb_annotation): Don't create a new one if the block didn't have an + annotation already. + + * tree-ssa-ccp.c (substitute_and_fold): Rename from + ssa_ccp_substitute_constants. Update all users. + Call replace_uses_in. + (replace_uses_in): New local function. + (evaluate_expr): Call it. + (initialize): Call get_base_symbol. + + * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Don't handle + E_FCALL. + +2002-09-22 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-dfa.o): Depend on hashtab.h. + * c-simplify.c (get_name): Declare extern. + * tree-cfg.c (tree_dump_cfg): Call it. + (tree_cfg2dot): Call it. + * tree-ssa-ccp.c (tree_ssa_ccp): Call get_name. + * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Call get_name. + * tree-ssa-pre.c (tree_perform_ssapre): Call get_name. + * tree-ssa.c (analyze_rdefs): Call get_name. + (dump_reaching_defs): Call get_name. + (dump_tree_ssa): Call get_name. + * tree.h (get_name): Declare. + + * tree-dfa.c: Include "hashtab.h" + (struct dfa_stats_d): New. + (collect_dfa_stats): New local function. + (collect_dfa_stats_r): New local function. + (count_tree_refs): New local function. + (count_ref_list_nodes): New local function. + (tree_find_refs): Call dump_begin on entry to the function. + (dump_referenced_vars): Call get_name. + (SCALE): Declare. + (LABEL): Declare. + (dump_dfa_stats): New function. + (debug_dfa_stats): New function. + * tree-dump.c (struct dump_option_value_info): Add entry for TDF_STATS. + * tree-flow.h (has_annotation): Remove. Update all users. + (dump_dfa_stats): Declare. + (debug_dfa_stats): Declare. + (tree_annotation): Don't create one if the tree doesn't have one + already. Update all users to new semantics. + * tree-ssa-dce.c (print_stats): Dump if dump_flags has TDF_STATS bit + set. + * tree-ssa.c (tree_build_ssa): Open dump file on entry. + Call dump_dfa_stats if dump_flags has TDF_STATS bit set. + Call dump_tree_ssa if dump_flags has TDF_DETAILS bit set. + * tree.h (TDF_STATS): Define. + * doc/invoke.texi: Document 'stats' flag for -fdump-tree. + + * tree-dfa.c (next_tree_ref_id): Change type to unsigned long. + Update all users. + tree-flow.h (tree_ref_common): Change type of field 'id' to + unsigned long. Update all users. + (ref_id): Change return type to unsigned long. Update all users. + +2002-09-21 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (struct expr_info): Add repaired member. + (repair_injury): Track which injuries we repaired, so we don't + repair them > 1 time. + +2002-09-20 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c (dump_c_node): Fix call to REAL_VALUE_TO_DECIMAL. + +2002-09-20 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_refs_in_stmt): Fix botched call to + clobber_vars_r with CLEANUP_STMT nodes. + +2002-09-20 Diego Novillo <dnovillo@redhat.com> + + * toplev.c (flag_tree_ssa): Remove. Update all users. + +2002-09-20 Frank Ch. Eigler <fche@redhat.com> + + * gcc.c (cc1_options): Make -fmudflap imply -fno-merge-constants. + * varasm.c (categorize_decl_for_section): Likewise, for strings. + * tree-mudflap.c (mudflap_enqueue_decl): Don't be interested + in !TREE_USED decls. Fix minor type warning. + (mf_offset_expr_of_array_ref): Create explicit temporary variables + for array index expressions instead of SAVE_EXPRs. Update callers. + (mf_build_check_statement_for): Insert temp variables. + (mx_xfn_indirect_ref): Correct recursion-protection checking + sequence. Tweak array check-base calculation back to "&array[0]". + (*): Use build_function_type_list instead of build_function_type. + (mx_external_ref): Remove unused parameter. Update callers. + +2002-09-19 Diego Novillo <dnovillo@redhat.com> + + * c-decl.c (c_expand_body): Invoke tree optimizers with -O1 and + above. + * flags.h (flag_tree_ssa): Remove. + * tree-cfg.c (find_expr_in_tree_helper): Change last argument type + to int. + * tree-dfa.c (create_ref): Ditto. + * tree-flow.h (num_referenced_vars): Change type to unsigned long. + * doc/invoke.texi (-ftree-ssa): Remove. + (-fdump-tree-{pre,ccp,dce}): Add to the summary section. + (-fdump-tree-xxx-details): Update documentation. + (-fdump-tree-ccp): Document. + (-fdump-tree-simple): Move elsewhere. + +2002-09-19 Richard Henderson <rth@redhat.com> + + * function.c (insns_for_mem_hash): Cast to size_t first. + * tree-dfa.c (num_referenced_vars): Unsigned long, not size_t. + (dump_referenced_vars): Use %lu for it. + (dump_ref): Use HOST_WIDE_INT_PRINT_DEC. + * tree-nomudflap.c (mudflap_c_function): Use ATTRIBUTE_UNUSED. + (mudflap_enqueue_decl, mudflap_enqueue_constant): Likewise. + * tree-ssa-pre.c (compute_idfs): Cast to size_t first. + + * tree-optimize.c (optimize_function_tree): Fix missed renamings. + * tree-ssa-pre.c (tree_perform_ssapre): Likewise. + +2002-09-19 Jeff Law <law@redhat.com> + + * tree-dfa.c (find_refs_in_stmt): Search for references in the call + address of a CALL_EXPR. + +2002-09-19 Daniel Berlin <dberlin@dberlin.org> + + * toplev.c: tree-ssa-* -> tree-*. + + * doc/invoke.texi: Ditto. + +2002-09-19 Daniel Berlin <dberlin@dberlin.org> + + * flags.h: flag_tree_ssa_* -> flag_tree_*. + + * toplev.c: Ditto. + + * tree-optimize.c: Ditto. + + * tree-dump.c: dump-tree-ssa-* -> dump-tree-*. + TDI_ssa_* -> TDI_*. + + * tree.h: Ditto + + * tree-ssa-dce.c (tree_ssa_eliminate_dead_code): Fix dump handling. + +2002-09-18 Daniel Berlin <dberlin@dberlin.org> + + * tree-dump.c (dump_files): Use dump-tree-ssa-??? for the option names + and "ssa-???" for the dump files. + + * tree.h: TDI_ccp and TDI_dce -> TDI_ssa_ccp and TDI_ssa_dce. + + * tree-ssa-ccp.c: TDI_ccp->TDI_ssa_ccp. + +2002-09-18 Daniel Berlin <dberlin@dberlin.org> + + * tree-dump.c: Fix order of dump files + +2002-09-17 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c: Remove a lot of finding refs in statements junk. + Start on strength reduction. + Only generate simple statements. + Remove EXPR* macros in favor of inline functions. + Update comparisons and sets to 1 and 0 to true and false where + approriate. + (toplevel): Add DEBUGGING_STRRED define (temporary, for + implementation debugging, *not* useful as a dump option). + Add TODO notes. + Add global avdefs, orig_expr_map, need_repair_map, + strred_candidate. + (set_var_phis): Add struct expr_info * argument. + Update to handle injuring definitions. + (defs_y_dom_x): Ditto. + (phi_opnd_from_res): Ditto. + (phi_for_operand): Remove extra \. + (find_tree_ref_for_var): Renamed to find_use_for_var. Update all + callers. + Use orig_expr_map to lookup original expression, remove statement + searching gunk. + (find_rhs_use_for_var): New function. + (is_strred_cand): New function. + (is_injuring_def): New function. + (calculate_increment): New function. + (repair_injury): New function. + (set_need_repair): New function. + (struct expr_info): Add strred_cand member. + (rename_2): Update to handle injuring definitions. + (expr_phi_insertion): Ditto. + (code_motion): Update to repair injuries. + Only insert SIMPLE statements. + Free avdefs here now. + (finalize_1): Don't free avdefs anymore here. + (tree_perform_ssapre): Record original expresion for + find_use_for_var's benefit. + Determine strength reduction candidates. + + * tree-flow.h: Remove EXPR* macros in favor of inline functions. + Remove E_INJ. + + * tree-dfa.c: Change EXPR* macros to the new functions. + Remove E_INJ. + +2002-09-18 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (M_ADDRESSOF): Define. + (find_refs_in_expr): Create addressof-use references for ADDR_EXPR + nodes. + Don't create references for FUNCTION_DECL nodes. + (ref_type_name): Handle M_ADDRESSOF. + (validate_ref_type): Ditto. + (clobber_vars_r): Don't clobber FUNCTION_DECL nodes. + * tree-flow.h (M_ADDRESSOF): Declare. + +2002-09-17 Diego Novillo <dnovillo@redhat.com> + + * doc/invoke.texi: Document -ftree-ssa-dce and -fdump-tree-dce. + * cp/Make-lang.in (CXX_C_OBJS): Add tree-ssa-dce.o. + +2002-09-17 Ben Elliston <bje@redhat.com> + + * Makefile.in (C_AND_OBJC_OBJS): Add tree-ssa-dce.o. + tree-ssa-dce.o): New target. + * tree-ssa-dce.c: New file. + * flags.h (flag_tree_ssa_dce): Declare flag. + * tree.h (tree_dump_index): Add TDI_dce. + * toplev.c (flag_tree_ssa_dce): New flag. + (f_options): Add "dump-tree-all-ssa" option. + * tree-flow.h (enum tree_flags): Add TF_NECESSARY. + * tree-dump.c (dump_files): Add dump-tree-dce option. + (dump_enable_all_ssa): Enable it when dumping all. + * tree-optimize.h (tree_ssa_eliminate_dead_code): Declare. + * tree-optimize.c (optimize_function_tree): Invoke the + optimisation pass if flag_tree_ssa_dce is set. + +2002-09-17 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa.o): Add dependency on c-tree.h + * c-simplify.c (mark_not_simple_r): Don't mark IDENTIFIER_NODEs. + * tree-dfa.c (function_may_recurse_p): Fix comment. + (dump_ref): Don't dump immediate uses for PHI nodes more than once. + (dump_referenced_vars): Unparse the name of the variable. + * tree-flow.h (dump_tree_ssa): Declare. + (debug_tree_ssa): Declare. + (replace_ref_operand_with): Check if OPERAND_P is NULL. + (restore_ref_operand): Ditto. + (tree_annotation): Check that constants, types and IDENTIFIER_NODEs + are not being annotated. + * tree-ssa.c: Include c-tree.h. + (dump_reaching_defs): Unparse the variable name. + (dump_tree_ssa): New function. + (tree_build_ssa): Call it. + (debug_tree_ssa): New function. + +2002-09-14 Steven Bosscher <s.bosscher@student.tudelft.nl> + + * dwarf2out.c (is_fortran): Return true for + DW_LANG_Fortran95. + (gen_compile_unit_die): Return DW_LANG_Fortran95 if + language is "GNU F95". + +2002-09-13 Daniel Berlin <dberlin@dberlin.org> + + * tree-dump.c (dump_switch_p): Get longest match, not first one. + + * tree.h: Put TDI_* back in order, now that we do longest match + matching. + +2002-09-13 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (add_call_site_clobbers): Call decl_function_context + instead of DECL_CONTEXT. + * tree-ssa-ccp.c (initialize): Ditto. + * tree-ssa.c (analyze_rdefs): Ditto. + +2002-09-11 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_refs_in_stmt): Call clobber_vars_r to clobber + CLEANUP_STMT nodes. + (create_ref): Only add _DECL nodes to the list of referenced + variables. + (clobber_vars_r): Create a may-use reference prior to clobbering + the variable. + (add_call_site_clobbers): Ditto. + (add_ptr_may_refs): Move call to find_list_node where it's actually + needed. + * tree-flow.h: Update documentation on M_CLOBBER. + +2002-09-10 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (defs_match_p): Fix typo ( | -> || ). + +2002-09-10 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (V_PHI_ARG): Remove. Adjust related constants. + Update all users. + (add_ref_to_list_after): Don't allocate memory for the + node when adding to the beginning or the end of the list. + (add_phi_arg): Don't call create_ref to add a new argument. + (debug_phi_args): New function. + (dump_phi_args): New function. + (dump_ref): Call it. + (dump_referenced_vars): Use 'file' instead of 'dump_file'. + + * tree-flow.h (V_PHI_ARG): Remove. Update all users. + (struct var_ref): Move fields used in distinct + reference types to other structures. Update all users. + (struct var_def): New. + (struct var_phi): New. + (struct var_use): New. + (union tree_ref_d): Add members vdef, vphi, vuse and vphi_arg. + Update all users. + (save_chain): Remove. Update all users. + (set_save_chain): Remove. Update all users. + (marked_with): Remove. Update all users. + (mark_def_with): Remove. Update all users. + (dump_reaching_defs): Declare. + (debug_reaching_defs): Declare. + + (struct phi_node_arg_d): New structure. + (phi_node_arg): New type. + (phi_arg): Change return type to phi_node_arg. + (imm_reaching_def_edge): Rename to phi_arg_edge. + (set_imm_reaching_def_edge): Rename to set_phi_arg_edge. + (phi_arg_def): New inline function. + (set_phi_arg_def): New inline function. + (debug_phi_args): Declare. + (dump_phi_args): Declare. + + * tree-ssa-ccp.c: Use new phi_node_arg type when examining PHI node + arguments. + + * tree-ssa-pre.c: Ditto. + + * tree-ssa.c (save_chain): New local variable. + (build_fud_chains, search_fud_chains): Use it. + (marked): New local variable. + (tree_compute_rdefs, follow_chain): Use it. + (dump_reaching_defs): New function. + (debug_reaching_defs): New function. + +2002-09-09 Daniel Berlin <dberlin@dberlin.org> + + * Makefile.in (tree-alias-steen.o): Remove gt-tree-alias-steen.h + (tree-alias-common.o): Add dependency on c-common.h + + * tree-ssa-pre.c: Fix PRE now that V_USE's expr's are the entire + assignment, rather than just the right hand side. + Stop generating our own call clobbers + + * tree-dfa.c (create_ref): Make sure var is not null before checking + TREE_THIS_VOLATILE. + + * tree.h: Reorder TDI_* so ssapre comes before ssa. + + * tree-dump.c: dump-tree-ssapre has to come before dump-tree-ssa + in the table, or else it'll never match. + +2002-09-09 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_offset_expr_of_array_ref): Fold constants along + the way. + (mf_build_check_statement_for): Ditto. Flag new COMPONENT_REFs. + (mx_xfn_indirect_ref): Instrument COMPONENT_REFs specially. Tweak + ARRAY_REF instrumentation to reduce need of copying and recursion. + +2002-09-09 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa.c (analyze_rdefs): Disable uninitialized variable warnings. + +2002-09-09 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa.o): Add dependency on tree-simple.h. + (tree-dfa.o): Add dependency on tree-simple.h and tree-inline.h. + (tree-alias-steen.o): Add dependency on c-common.h. + (tree-optimize.o): Add dependency on c-common.h. + + * c-simplify.c (deep_copy_node): Call walk_tree with mostly_copy_tree_r. + (mostly_copy_tree_r): Also copy flags from original tree. + (mark_not_simple_r): Call set_tree_flag. + + * tree-alias-steen.c: Include c-common.h. + + * tree-cfg.c (map_stmt_to_bb): Remove. + (block_invalidates_loop): Change return type to bool. + (create_loop_hdr): New function. + (create_bb): Call it. + (create_bb_ann): Return newly created annotation object. + (remove_bb_ann): Nullify loop_hdr annotation, if there is one. + (tree_delete_bb): Only remove basic block annotation from + executables statements. + (is_computed_goto): New function. + + * tree-dfa.c (pointer_refs): New file local variable. + (call_sites): New global variable. + (V_DEF, V_USE, V_PHI, V_PHI_ARG, E_FCALL, E_PHI, E_USE, E_KILL, + E_INJ): New global constants. + (M_DEFAULT, M_CLOBBER, M_MAY, M_PARTIAL, M_INITIAL, M_INDIRECT, + M_VOLATILE): New global constants. + (num_referenced_vars): New global variable. + (referenced_vars): Rename from referenced_symbols. Update all + users. + (clobber_vars_r): New function. + (add_default_defs): New function. + (add_call_site_clobbers): New function. + (add_ptr_may_refs): New function. + (add_phi_arg): New function. + (find_list_node): New function. + (remove_ref_from_list): Call it. + (add_ref_to_list_after): New function. + (is_pure_fcall): New function. + (fcall_takes_ref_args): New function. + (dump_referenced_vars): New function. + (debug_referenced_vars): New function. + (ref_type_name): New function. + (validate_ref_type): New function. + (debug_phi_args): Remove. + (dump_phi_args): Remove. + (add_referenced_var): Rename from add_ref_symbol. Update all + users. + (dump_ref): Rename from dump_varref. Update all users. + (debug_ref): Rename from debug_varref. Update all users. + (dump_ref_list): Rename from dump_varref_list. Update all users. + (dump_ref_array): Rename from dump_varref_array. Update all users. + (next_tree_ref_id): Rename from next_varref_id. Update all users. + + (tree_find_refs): Rename from tree_find_varrefs. Update all users. + Call add_default_defs. + Call add_call_site_clobbers. + Call add_ptr_may_refs. + Call dump_referenced_vars. + Create and destroy pointer_refs list. + + (find_refs_in_stmt): Set reference type to clobbering definition + for the ASM_OUTPUTS and ASM_CLOBBERS expressions of an ASM_STMT. + Set reference type to initial definition for the DECL_INITIAL node + of a DECL_STMT. + Clobber everything in CLEANUP_STMT nodes. + + (find_refs_in_expr): Re-write. + Recursively clobber every VAR_DECL contained in non SIMPLE nodes. + Mark indirect pointer references with M_INDIRECT flag. + Add pointer references to pointer_refs list. + Glob references to arrays and structures. + Add function call expressions to call_sites list. + + (empty_ref_list): Do nothing if the list is empty already. + (delete_ref_list): Ditto. + (create_ref): Add new argument ADD_TO_BB. + Set M_VOLATILE modifier if this is a reference to a volatile + variable. + Count number of incoming edges for V_PHI references before + initializing the V_PHI_ARG array. + Only add reference to basic block if ADD_TO_BB is true. + Set output reference for the parent expression for V_DEF + references. + (remove_tree_ann): Do nothing if the tree didn't have an + annotation. + + * tree-flow.h (enum treeref_type): Remove. Update all users. + (union varref_def): Ditto. + (tree_ref): Rename from varref. Update all users. + (V_DEF): Declare. + (V_USE): Declare. + (V_PHI): Declare. + (V_PHI_ARG): Declare. + (E_FCALL): Declare. + (E_PHI): Declare. + (E_USE): Declare. + (E_KILL): Declare. + (E_INJ): Declare. + (M_DEFAULT): Declare. + (M_CLOBBER): Declare. + (M_MAY): Declare. + (M_PARTIAL): Declare. + (M_INITIAL): Declare. + (M_INDIRECT): Declare. + (M_VOLATILE): Declare. + (struct tree_ref_common): Rename from treeref_common. Update all + users. + Change type of field 'type' to HOST_WIDE_INT. + Rename field 'sym' to 'var'. + (struct var_ref): Rename from varref. Update all users. + Join the structures varuse + and vardef into a single structure. + (struct expr_ref_common): Rename from exprref_common. Update all + users. + (struct expr_use): Rename from expruse. Update all users. + (struct expr_phi): Rename from exprphi. Update all users. + (union tree_ref_d): Rename from varref_def. Update all users. + (EXPRPHI_PHI_ARGS): Rename from EXPRPHI_PHI_CHAIN. Update all + users. + (struct tree_ann_d): Rename field 'compound_stmt' to + 'compound_parent'. + Add field 'output_ref'. + (enum tree_flags): New enum. + (TF_REFERENCED): New flag. + (phi_arg): Remove. + (get_num_phi_args): Remove. + (get_phi_arg): Remove. + + (struct vardef): Remove. Update all users. + (VARDEF_IMM_USES): Ditto. + (VARDEF_SAVE_CHAIN): Ditto. + (VARDEF_RUSES): Ditto. + (VARDEF_MARKED): Ditto. + (VARDEF_PHI_ARGS): Ditto. + (struct varuse): Ditto. + (VARUSE_IMM_RDEF): Ditto. + (VARUSE_RDEFS): Ditto. + (VARREF_ID): Ditto. + (VARREF_TYPE): Ditto. + (VARREF_BB): Ditto. + (VARREF_EXPR): Ditto. + (VARREF_OPERAND_P): Ditto. + (VARREF_STMT): Ditto. + (VARREF_SYM): Ditto. + (IS_DEFAULT_DEF): Ditto. + (IS_ARTIFICIAL_REF): Ditto. + (TREE_ANN): Ditto. + (BB_FOR_STMT): Ditto. + (TREE_CURRDEF): Ditto. + (TREE_REFS): Ditto. + (TREE_COMPOUND_STMT): Ditto. + (TREE_FLAGS): Ditto. + (BB_ANN): Ditto. + (BB_PARENT): Ditto. + (BB_REFS): Ditto. + (BB_PREV_CHAIN_P): Ditto. + (BB_BINDING_SCOPE): Ditto. + (BB_LOOP_HDR): Ditto. + (FOR_INIT_STMT_BB): Ditto. + (FOR_COND_BB): Ditto. + (FOR_EXPR_BB): Ditto. + (END_WHILE_BB): Ditto. + (DO_COND_BB): Ditto. + (BB_EMPTY_P): Ditto. + + (ref_type): New inline function. + (ref_var): New inline function. + (ref_stmt): New inline function. + (ref_expr): New inline function. + (ref_bb): New inline function. + (ref_id): New inline function. + (replace_ref_operand_with): New inline function. + (restore_ref_operand): New inline function. + (imm_uses): New inline function. + (save_chain): New inline function. + (set_save_chain): New inline function. + (reached_uses): New inline function. + (marked_with): New inline function. + (mark_def_with): New inline function. + (phi_args): New inline function. + (num_phi_args): New inline function. + (phi_arg): New inline function. + (imm_reaching_def): New inline function. + (set_imm_reaching_def): New inline function. + (imm_reaching_def_edge): New inline function. + (set_imm_reaching_def_edge): New inline function. + (reaching_defs): New inline function. + (tree_annotation): New inline function. + (has_annotation): New inline function. + (bb_for_stmt): New inline function. + (set_bb_for_stmt): New inline function. + (currdef_for): New inline function. + (set_currdef_for): New inline function. + (tree_refs): New inline function. + (add_tree_ref): New inline function. + (remove_tree_ref): New inline function. + (compound_parent): New inline function. + (set_compound_parent): New inline function. + (set_tree_flag): New inline function. + (clear_tree_flag): New inline function. + (tree_flags): New inline function. + (reset_tree_flags): New inline function. + (output_ref): New inline function. + (set_output_ref): New inline function. + (bb_annotation): New inline function. + (bb_parent): New inline function. + (set_bb_parent): New inline function. + (bb_refs): New inline function. + (remove_bb_ref): New inline function. + (prev_chain_p): New inline function. + (set_prev_chain_p): New inline function. + (binding_scope): New inline function. + (set_binding_scope): New inline function. + (header_blocks): New inline function. + (for_init_bb): New inline function. + (set_for_init_bb): New inline function. + (for_cond_bb): New inline function. + (set_for_cond_bb): New inline function. + (for_expr_bb): New inline function. + (set_for_expr_bb): New inline function. + (end_while_bb): New inline function. + (set_end_while_bb): New inline function. + (do_cond_bb): New inline function. + (set_do_cond_bb): New inline function. + (bb_empty_p): New inline function. + + (referenced_vars): Rename from referenced_symbols. Update all + users. + (num_referenced_vars): Declare. + (NREF_SYMBOLS): Remove. Update all users. + (REF_SYMBOL): Ditto. + (ADD_REF_SYMBOL): Ditto. + (referenced_var): New inline function. + (call_sites): Declare. + (next_tree_ref_id): Rename from next_varref_id. Update all users. + (is_computed_goto): Declare. + (is_pure_fcall): Declare. + (fcall_takes_ref_args): Declare. + (add_ref_to_list_after): Declare. + (find_list_node): Declare. + (ref_type_name): Declare. + (validate_ref_type): Declare. + + * tree-optimize.c: Include c-common.h. + (optimize_function_tree): Store DECL_SAVED_TREE in a local + variable. + + * tree-ssa-ccp.c (cp_lattice_meet): New function. + (visit_phi_node): Call it. + (add_outgoing_control_edges): New function. + (visit_expression_for): Call it. + Don't handle static initializers. + Handle computed gotos. + (add_control_edge): New function. + (visit_condexpr_for, simulate_block, add_outgoing_control_edges): Call + it. + (simulate_def_use_chains): Only look at unmodified V_USE references. + (ssa_ccp_substitute_constants): Ditto. + (evaluate_expr): Ditto. + (initialize): Set initial value for incoming parameters and globals + to VARYING. + Set initial value for initialized static variables to VARYING, + unless the variable is read-only. + (set_lattice_value): Don't special case globals, volatiles and + variables with their address taken. + + * tree-ssa.c: Include tree-simple.h. + (tree_build_ssa): Don't add default definitions. + (insert_phi_terms): Add new PHI nodes at the beginning of the list + of references for the basic block. + (search_fud_chains): Add def-def chains for non-killing + definitions. + (delete_ssa): Remove list call_sites. + Set num_referenced_vars to 0. + Set referenced_vars to NULL. + (follow_chain): Follow def-def chains for non-killing definitions. + (is_upward_exposed): Change return type to bool. + (add_phi_arg): Remove. + +2002-09-06 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (deferred_static_decl*): Correct GTY markup. + (mudflap_enqueue_decl): Correct iteration bounds. + (mf_init_extern_trees): Add more constness to mf_cache_structptr_type. + (mf_offset_expr_of_array_ref): Remove excess mx_flagging. save_expr + array subscripts. + (mf_build_check_statement_for): Reorganize to take explicit + check-base/size arguments, in addition to value argument. save_expr + array subscripts. Copy value/base/size subtrees. + (mx_xfn_indirect_ref): Support marking of subtrees for nontraversal. + Track source line numbers more aggressively. For arrays, check bounds + from base through indexed element, not just the indexed element. + Use nontraversal flagging to eliminate some excess instrumentation. + (mf_xform_derefs): Support nontraversal by a hash table. + (*): Remove "{{{"/"}}}" folding marks. + +2002-09-02 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-common.[ch]: New files. + * tree-alias-steen.[ch]: Split out common stuff into + tree-alias-common.[ch]. + * c-config-lang.in: Modify to use tree-alias-common.[ch] instead of + tree-alias-steen, since this is where the GTY'd stuff is now. + * Makefile.in: Add dependencies for tree-alias-common.[ch]. + +2002-09-03 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_goto_stmt): New function. + (simplify_stmt): Call it. + * tree-simple.c: Document grammar for GOTO_STMT nodes. + (rationalize_compound_expr): Wrap it with #if 0/#endif. + (get_base_symbol): Minor comment fixup. + +2002-09-03 Frank Ch. Eigler <fche@redhat.com> + + * gcc.c (MFWRAP_SPEC): Add --wrap=alloca. + +2002-09-01 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_stmt): Mark CLEANUP_STMTs and ASM_STMTs + not SIMPLE. + (simplify_for_stmt): Do not allow expression sequences in + FOR_INIT_STMT and FOR_EXPR nodes. + * tree-simple.c: Document difference with original SIMPLE grammar. + +2002-08-31 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mf_build_check_statement_for): Tolerate dereference + of void pointers. + (mx_register_decl): Correct typo in below patch. + +2002-08-30 Graydon Hoare <graydon@redhat.com> + + * tree-mudflap.c (mx_register_decl): Mark declarations as + TREE_ADDRESSABLE when mudflap decides to register them. + +2002-08-29 Graydon Hoare <graydon@redhat.com> + + * tree-mudflap.c (mx_xfn_indirect_ref): Rewrite array references as + pointer dereferences. + (struct mf_xform_decls_data): New member: param_decls. + (mx_register_decl): New function. + (mx_xfn_xform_decls): Factor code out into mx_register_decl. + Register live parameters with mudflap. + (mx_xfn_find_addrof): Notice references to fields of structures + and function parameters. + +2002-08-29 Frank Ch. Eigler <fche@redhat.com> + + * c-pretty-print.c (dump_c_tree): Detect loops in statement chains + using a hash table to track visited status. + * Makefile.in: Add hashtab.h dependency. + +2002-08-28 Frank Ch. Eigler <fche@redhat.com> + + * tree-mudflap.c (mudflap_enqueue_constant): Register non-string + constants also. + (mf_build_check_statement_for): Include pushlevel/pushdecl/poplevel + for local variables. + +2002-08-27 Frank Ch. Eigler <fche@redhat.com> + + Better static registration: + * varasm.c (make_decl_rtl): Handle DECL_RTL_SET_P case for + mudflap static registration. + * tree-mudflap.c (mudflap_enqueue_decl): Rewrite to handle + deferred statics. + (mudflap_finish_file): Call above fn back for deferred statics. + + Cleanup: + * tree-mudflap.c (mf_varname_tree, mf_file_function_line_tree): + Reorganize output_buffer reuse mechanism. + (mf_build_check_statement_for): Set TREE_SIDE_EFFECTS. + (mx_xfn_indirect_ref): Correct file/line collection tests. + + Dynamic linking support: + * gcc.c (MFWRAP_SPEC): Make conditional on -static. Add the + newer wrapped functions dlopen/mmap/munmap. + (MFLIB_SPEC): Be sensitive to -static. Partial support for + dynamic linking. + +2002-08-26 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa.o): Add dependency on ggc.h + (c-simplify.o): Add dependency on langhooks-def.h + * c-simplify.c: Include langhooks-def.h + (simplify_function_tree): Do nothing if the front end does not + support simplification. + + * tree-flow.h (struct vardef): Remove fields 'phi_chain' and + 'phi_chain_bb'. + Add field 'phi_args'. + (VARDEF_PHI_CHAIN): Remove. Update all users. + (VARDEF_PHI_CHAIN_BB): Remove. Update all users. + (VARDEF_PHI_ARGS): Define. + (struct varuse): Rename field 'chain' to 'imm_rdef'. Update all + users. + (VARUSE_IMM_RDEF): Rename from VARUSE_CHAIN. Update all users. + (phi_arg): New structure. + (get_num_phi_args): New function. + (get_phi_arg): New function. + (set_phi_arg): New function. + (add_phi_arg): New function. + (debug_phi_args): Declare. + (dump_phi_args): Declare. + * tree-dfa.c (create_ref): Remove initialization of + VARDEF_PHI_CHAIN and VARDEF_PHI_CHAIN_BB. + Initialize array VARDEF_PHI_ARGS. + (dump_varref): Call dump_phi_args. + (dump_phi_args): New function. + (debug_phi_args): New function. + * tree-ssa-ccp.c (PHI_PARMS): Remove. + (EIE): Remove. + (visit_phi_node): Get the argument's edge directly from the + argument instead of calling find_edge. + (initialize): Cast call to NUM_EDGES to unsigned. + * tree-ssa-pre.c: Update uses of VARDEF_PHI_CHAIN, + VARDEF_PHI_CHAIN_BB and VARUSE_CHAIN everywhere. + * tree-ssa.c: Ditto. + Include ggc.h. + (search_fud_chains): Call add_phi_arg to add arguments to each PHI + node. + (tree_ssa_remove_phi_alternative): Call set_phi_arg to switch the + last element with the element being removed. + +2002-08-26 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (mostly_copy_tree_r): Unshare STMT_EXPR + nodes. + +2002-08-25 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_refs_in_stmt): Replace calls to + RETURN_EXPR with RETURN_STMT_EXPR. + * c-simplify.c (simplify_return_stmt): Ditto. + (deep_copy_node): Ditto. + * c-pretty-print.c (dump_c_node): Ditto. + +2002-08-24 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c: Add `break' after calls to NIY in + switch statements. + +2002-08-23 Jeffrey A Law (law@redhat.com) + + * tree-ssa-ccp.c (tree_ssa_ccp): Remove #if 0 that accidentally + got checked in. Cleanup the cfg to remove unreachable blocks + discovered by CCP. + + * basic-block.h (EDGE_EXECUTABLE): New edge flag. + + * cfganal.c (find_edge): New function. + + * ssa-ccp.c: Convert to use EDGE_EXECUTABLE bit in the + edge flags rather than a bitmap. Convert edge worklist + into a varray. Avoids expensive find_index_edge calls. + * tree-ssa-ccp.c: Likewise. + + * tree-flow.h (tree_ssa_remove_phi_alternative): Declare. + * tree-ssa.c (tree_ssa_remove_phi_alternative): New function. + * tree-ssa-ccp.c (optimize_unexecutable_edges): Remove + PHI alternatives for unexecutable edges. Also remove + unexecutable edges from the CFG. + +2002-08-22 Jeffrey A Law (law@redhat.com) + + * Makefile.in (tree-optimize.o): Depend on tree-dchain.o + * tree-optimize.c: Include tree-dchain.h. + (optimize_function_tree): Unconditionally build and tear down + the backpointers for the statement chain. + +2002-08-22 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_refs_in_stmt): Look for VARUSE references in + initialization expressions. + (find_refs_in_expr): Reformat. + (remove_ref_from_list): Optimize for the common case of removing + the head or the tail of the list. + (add_ref_to_list_end): Reformat comment. + (create_ref): Store the reference to LHS of assignment expressions. + (dump_varref): Also dump immediate uses of PHI nodes. + * tree-flow.h (IS_GHOST_DEF): Rename to IS_DEFAULT_DEF. Update all + callers everywhere. + (struct tree_ann_def): Update comments for field 'currdef'. + * tree-ssa-ccp.c (ssa_edges): Change type to ref_list. + (SSA_NAME): Remove. + (initialize): New function + (finalize): New function. + (visit_expression): Rename to visit_expression_for. Update all + callers. + (visit_condexpr_for): New function. + (visit_assignment): Rename to visit_assignment_for. Update all + callers. + (examine_flow_edges): Rename to simulate_block. Update all + callers. + (follow_def_use_chains): Rename to simulate_def_use_chains. Update + all callers. + (evaluate_expr_for): Rename to evaluate_expr. Change argument to + 'tree'. + (set_lattice_value): New function. + (tree_ssa_ccp): Change main loop to visit flow_edges and ssa_edges + alternately. + (visit_phi_node): Do not set the lattice value to UNDEFINED when we + find a non-executable edge. + (visit_expression_for): Default definitions for PARM_DECLs are + assigned a VARYING value. + Default definitions for any other local variables are assigned an + UNDEFINED value. + Clobber VARDEFs that are not the LHS of an assignment. + Clobber VARDEFs that initialize non-const static variables. + * tree-ssa.c (search_fud_chains): Set up def-use edges for PHI + nodes and regular definitions. + + * tree.c (simple_cst_equal): Call simple_cst_list_equal to compare + CONSTRUCTOR_ELTS pointers. + +2002-08-22 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c (buffer): New file local variable. + (initialized): New file local variable. + (print_c_tree): Don't call init_output_buffer. Call + maybe_init_pretty_print. + (print_c_node): Ditto. + (print_c_node_brief): Ditto. + (maybe_init_pretty_print): New function. + * tree-mudflap.c (mf_varname_tree): Only call init_output_buffer + once. Call output_clear_message_text before returning. + +2002-08-21 Frank Ch. Eigler <fche@redhat.com> + + Support source-file/line coordinates in check/violation messages. + * tree-mudflap.c (mf_init_extern_trees): Add new "location" formal + arg to __mf_check. + (mf_file_function_line_tree): New function to build an actual location + string. + (build_check_statement_for): Call it / pass it. + (mx_xfn_indirect_ref): Track source file/line location via + STMT_LINENO, FILE_STMT, EXPR_WITH_FILE_LOCATION traversal memos. + +2002-08-21 Daniel Berlin <dberlin@dberlin.org> + + * dominance.c: Cache immediate dominators. + +2002-08-20 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-steen.h (struct tree_alias_ops): Add flag for + interprocedural. + + * tree-alias-steen.c (steen_alias_ops): Set interprocedural to 0 + for now. + (intra_function_call): New function to handle intraprocedural calling. + (finc_func_aliases): Use it. + Handle *x = *y, *x = &y, and *x = (cast) y. + (display_points_to_set_helper): New function, split from ... + (display_points_to_set): Here. + (create_alias_vars): Try to print all alias vars we find in the + alias_vars array, rather than just those that are linked directly to + trees. + Clear arrays when we finish if we aren't interprocedural. + +2002-08-20 Frank Ch. Eigler <fche@redhat.com> + + static object registration support: + * tree-mudflap.c (mudflap_enqueue_decl, mudflap_enqueue_constant): + Replace stubs with real code. + (mf_enqueue_register_call): New function to generate asm-object + call to __mf_register. + (mf_flush_enqueued_calls): New function to emit global ctor function + with enqueued __mf_register calls. + (mf_varname_tree): Tolerate being called from non-function context. + * c-objc-common.c: #include <tree-mudflap.h>. + + gengtypes support for mudflap: + * Makefile.in (GTFILES): Include tree-mudflap.c. + (gt-tree-mudflap.h): New target. + * tree-mudflap.c: Annotate global tree nodes with GTY(()). + * tree-nomudflap.c: Add dummy ggc root table. + +2002-08-19 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_refs_in_expr): If the current sub-expression is + not SIMPLE, mark its parent. + (create_ref): If the parent expression is not SIMPLE, create + VARDEFs regardless of the original reference type. + + * tree-ssa-ccp.c (widen_bitfield): New function. + (evaluate_expr_for): Call it. + +2002-08-18 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (evaluate_expr_for): Fix thinko in + 2002-08-17 patch. + +2002-08-17 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa-ccp.c (evaluate_expr_for): keep VARREF_SYM in a local + variable. + +2002-08-16 Diego Novillo <dnovillo@redhat.com> + + * basic-block.h (BB_CONTROL_EXPR): Update value. + (BB_LOOP_CONTROL_EXPR): Define. + (BB_CONTROL_ENTRY): Update value. + * tree-cfg.c (make_for_stmt_blocks): Flag header blocks withh + BB_LOOP_CONTROL_EXPR. + (make_while_stmt_blocks): Ditto. + (make_do_stmt_blocks): Ditto. + (tree_delete_bb): Update annotations in the loop entry block when + removing one of the loop expression blocks. + + * tree-dfa.c (tree_find_varrefs): Disregard empty blocks. + (find_refs_in_stmt): Handle all the loop expression blocks in + FOR_STMT and DO_STMT nodes. + (find_refs_in_expr): Change first argument to tree *. Update all + callers. + Force all references to be definitions when the expression is not + in SIMPLE form. + Also create references for compound variables and array references. + Not just their individual components. + Always use the original parent expression when making recursive + calls. + (create_ref): Add new argument operand_p. Update all callers. + (remove_tree_ann): New function. + (dump_varref): Don't assume that the referenced symbol is a _DECL + node. + * tree-flow.h (treeref_common): Add field operand_p. + (VARREF_OPERAND_P): Define. + (BB_EMPTY_P): Define. + (remove_tree_ann): Declare. + (create_ref): Add new argument operand_p. + * tree-simple.c (get_base_symbol): New function. + * tree-simple.h (get_base_symbol): Declare. + * tree-ssa-ccp.c (visit_assignment): Call it. + (ssa_ccp_substitute_constants): Use VARREF_OPERAND_P to replace + values into the expression. + (evaluate_expr_for): Ditto. + Do not try to evaluate the expression if the reference is not of + the same type as the expression. + After evaluation, restore the expression to its original form. + * tree-ssa-pre.c (insert_occ_in_preorder_dt_order_): Update calls + to create_ref. + (finalize_): Ditto. + (expr_phi_insertion): Ditto. + * tree-ssa.c (tree_build_ssa): Ditto. + (insert_phi_terms): Ditto. + (delete_ssa): Call remove_tree_ann. + +2002-08-15 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c: Move extern definitions to diagnostic.h. + (print_c_node_brief): New function. + (debug_c_node_brief): New function. + (debug_c_node): Add option for showing brief versions of statement + nodes. Update all callers. + (print_declaration): Ditto. + * c-simplify.c (simplify_function_tree): Add newline to debug + output. + * c-tree.h (print_c_node_brief): Declare. + (debug_c_node_brief): Declare. + * tree-cfg.c: Call print_c_node_brief in debugging otuput. + * tree-mudflap.c (dump_c_node): Remove extern declaration. + (mf_varname_tree): Update call to dump_c_node. + +2002-08-15 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg.c (find_expr_in_tree_helper): Renamed from find_expr_in_tree. + (find_expr_in_tree): Redone. + +2002-08-15 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg.c (insert_before_ctrl_stmt): Fix insertion for various + parts of for loop. + + * tree-ssa-pre.c (finalize_1): Set EXPR_STMT type to type of + expression in it. + +2002-08-14 Frank Ch. Eigler <fche@redhat.com> + + * gcc.c (LINK_COMMAND_SPEC): Tweak placement of %(mflib). + +2002-08-14 Diego Novillo <dnovillo@redhat.com> + + * tree-simple.h (is_simple_decl_stmt): Declare. + +2002-08-13 Frank Ch. Eigler <fche@redhat.com> + + * gcc.c (MFWRAP_SPEC, MFLIB_SPEC): New macros, splitting MFLIB_SPEC. + (mfwrap_spec, mflib_spec): Define corresponding vars. + (static_specs): Define correponding spec aliases. + (LINK_COMMAND_SPEC): Include -fmudflap refs to new spec aliases. + (cpp_unique_options): Move -fmudflap MFCPP_SPEC clause here. + (cc1_options): Move -fmudflap MFCC1_SPEC clause here. + (MFCC1_SPEC, MFCPP_SPEC, MFLIB_SPEC): Remove macros and uses. + +2002-08-13 Graydon Hoare <graydon@redhat.com> + + * tree-mudflap.c (mf_build_check_statement_for): Factor code out of + mx_xfn_indirect_ref for use in ARRAY_REF case. + (mf_build_check_statement_for): Check size of underlying object + rather than size of pointer. + (mx_xfn_indirect_ref): Check ARRAY_REF expressions. + (mf_offset_expr_of_array_ref): New function to calculate array ref + offsets. + +2002-08-13 Diego Novillo <dnovillo@redhat.com> + + * tree-simple.c (is_simple_condexpr): Update comment. + * tree-ssa-ccp.c (ssa_ccp_substitute_constants): Add debugging code. + +2002-08-12 Jason Merrill <jason@redhat.com> + + * c-typeck.c (build_component_ref): Don't add a NON_LVALUE_EXPR + in C99 mode. + + * c-simplify.c (simplify_expr): Always simplify. Loop if *expr_p + changed. + (simplify_addr_expr): Just replace *expr_p if we have a '&*'. + * tree-simple.c (is_simplifiable_builtin): Add more tree codes. + +2002-08-11 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c: Fix typo. Substitute CHECKING with ENABLE_CHECKING. + * tree-cfg.c: Ditto. + * tree-dfa.c: Ditto. + * tree-ssa-ccp.c: Ditto. + * tree-ssa.c: Ditto. + +2002-08-11 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_refs_in_expr): Use the given ref_type for some unary + expressions. + (create_ref): Insert ghost definitions at the beginning of the + basic block. + (find_expr_in_tree): Ignore IDENTIFIER_NODE. + * tree-flow.h (treeref_common): Move the id field to the end of the + structure. + (IS_GHOST_DEF): Redefine to return non zero for definitions + without an associated expression in basic block 0. + * tree-ssa-ccp.c (tree_ssa_ccp): Use last_basic_block to allocate + executable_blocks. + (visit_expression): Set the lattice value for ghost definitions to + VARYING. + (examine_flow_edges): Update comments. + * tree-ssa.c (tree_build_ssa): Create ghost definitions in basic + block 0. + (insert_phi_terms): Don't ignore ghost definitions. + + * c-simplify.c (simplify_function_tree): Return 0 if the function's + body is not a COMPOUND_STMT. + Return 0 if simplification failed. + (simplify_expr): Change to return int. Return non zero if + simplification was successful. + (c_simplify_expr): Add default case to avoid compile time warnings. + (create_tmp_alias_var): Reformat comment. + * tree-simple.h (simplify_expr): Change return type to int. + + * c-simplify.c: Guard consistency checks with #if defined CHECKING + everywhere. + * tree-cfg.c: Ditto. + * tree-dfa.c: Ditto. + * tree-ssa-ccp.c: Ditto. + * tree-ssa.c: Ditto. + + * c-simplify.c: Include hard-reg-set.h, basic-block.h and + tree-flow.h. + (mark_not_simple_r): New function. + (simplify_expr): Temporarily mark VA_ARG_EXPR and BIT_FIELD_REF + trees as not simplifiable. + (simplify_call_expr): If the builtin cannot be simplified, flag it. + * Makefile.in (c-simplify.o): Update dependencies. + * tree-dfa.c (create_ref): Variable references inside + non-simplifiable expressions are always considered definitions. + * tree-flow.h (TF_NOT_SIMPLE): New flag. + * tree-simple.c (is_simplifiable_builtin): Update comments. + + * c-pretty-print.c (dump_c_node): Unparse anonymous structures and + unions. + Change rendering for SAVE_EXPR and BIT_FIELD_REF. + + * Makefile.in (tree-mudflap.o, tree-nomudflap.o): Add. + +2002-08-11 Frank Ch. Eigler <fche@redhat.com> + + Prototype -fmudflap support. + * Makefile.in (C_AND_OBJC_OBJS): Add tree-mudflap.o. + (OBJS): Add tree-nomudflap.o. + * flags.h (flag_mudflap): New flag. + * toplev.c: Map "-fmudflap" to that flag. + * c-decl.c (c_expand_body): Call mudflap_c_function if flag_mudflap. + * c-objc-common.c (c_objc_common_finish_file): Add mudflap hook. + * varasm.c (make_decl_rtl): Add mudflap hook. + (output_constant_def_contents): Ditto. + * tree-mudflap.c: New file: implement mudflap instrumentation. + * tree-nomudflap.c: New file: stub functions for non-C frontends. + * tree-mudflap.h: New file: define exported functions. + * gcc.c (MFLIB_SPEC, MFCC1_SPEC, MFCPP_SPEC): Add general + -fmudflap spec mappings. + * c-simplify.c (simplify_stmt): Stub: handle CLEANUP_STMT nodes. + * tree-dfa.c (find_refs_in_stmt): Ditto. + * c-pretty-print.c (dump_c_node): Ditto. + (print_declaration): Handle "extern" decls. Handle arrays with + indefinite sizes. + * tree-simple.h (is_simple_stmt, is_simple_compstmt): Remove decls. + +2002-08-11 Jason Merrill <jason@redhat.com> + + * c-simplify.c (simplify_self_mod_expr): Unshare the lhs before + using it again. + (simplify_compound_lval): Don't unshare. + + * c-simplify.c (c_simplify_expr): Check statement_code_p. + + * c-simplify.c (maybe_fixup_loop_cond): Move to cp/cp-simplify.c. + (simplify_for_stmt): Don't call it. + (simplify_while_stmt): Don't call it. + +2002-08-11 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_compound_lval): Use mostly_copy_tree_r. + +2002-08-09 Jason Merrill <jason@redhat.com> + + * langhooks-def.h: Replace the simplify_function_tree hook + with a simplify_expr hook. + * langhooks.h: Likewise. + * langhooks.c: Replace lhd_simplify_function_tree with + lhd_simplify_expr. + * c-lang.c (LANG_HOOKS_SIMPLIFY_FUNCTION_TREE): Don't define. + (LANG_HOOKS_SIMPLIFY_EXPR): Define. + * c-decl.c (c_expand_body): De-hook simplify_function_tree. + * c-common.h: Declare c_simplify_expr. + * c-simplify.c (simplify_function_tree): Rename from + c_simplify_function_tree. Call simplify_expr instead of + simplify_stmt. + (c_simplify_expr): Split out from... + (simplify_expr): ...here. No longer static. Call langhook. + (is_simple_decl_stmt): Move here from tree-simple.c. + * tree-simple.c: Don't include c-tree.h. + (is_simple_stmt, is_simple_compstmt): Remove. + (is_simple_decl_stmt): Move to c-simplify.c. + * tree.h: Declare simplify_function_tree. + * tree-simple.h: Declare simplify_expr, add_tree. + + * tree-simple.c (rationalize_compound_expr): New fn. + +2002-08-07 Diego Novillo <dnovillo@redhat.com> + + * basic-block.h (EDGE_TRUE_VALUE): Define. + (EDGE_FALSE_VALUE): Define. + * tree-cfg.c: Include c-tree.h. + (make_for_stmt_edges): Call simple_cst_equal to determine infinite + and zero iteration loops. + Set EDGE_TRUE_VALUE and EDGE_FALSE_VALUE to edges coming out of + predicate block. + (make_while_stmt_edges): Ditto. + (make_do_stmt_edges): Ditto. + (make_if_stmt_edges): Set EDGE_TRUE_VALUE and EDGE_FALSE_VALUE to + edges coming out of predicate block. + + * c-simplify.c (simplify_compound_lval): Unshare the compound + reference before simplification. + + * tree-cfg.c (insert_before_ctrl_stmt): Call print_c_node instead of + print_node_brief. + (insert_before_normal_stmt): Ditto. + (insert_after_ctrl_stmt): Ditto. + (insert_after_normal_stmt): Ditto. + (insert_after_loop_body): Ditto. + (replace_expr_in_tree): Ditto. + (tree_dump_bb): Ditto. + + * tree-dfa.c: Include c-tree.h + (next_varref_id): New global variable. + (tree_find_varrefs): Initialize it to 0. + (create_ref): Increment it after creating a new reference. Store + it in ref.common.id. + Add the new reference to the list of references for the containing + expression. + (dump_varref): Show the reference ID. + * tree-flow.h (treeref_common): Add field 'id'. + (VARREF_ID): Define. + + * tree-dump.c (dump_files): Re-order dump files. + * tree.h (tree_dump_index): Ditto. + + * tree-optimize.c (optimize_function_tree): Remove blank lines. + + * tree-simple.c: Remove unary operator '!' from grammar. + + * tree-flow.h (tree_ann_def): Add field 'flags'. + (TF_FOLD): Define. + (TREE_ANN): Re-define into an lvalue. + (BB_FOR_STMT): Ditto. + (TREE_CURRDEF): Ditto. + (next_varref_id): Declare. + * tree-ssa-ccp.c: Include tree-simple.h + (ssa_edges): Convert sbitmap into varray_type. Update all uses. + (decl_map): Remove. + (SSA_NAME): Use VARREF_ID instead of DECL_UID. + (visit_assignment): New function. + (evaluate_expr_for): New function. + (dump_lattice_value): New function. + (tree_ssa_ccp): Add debugging dumps. + Remove #if 0 code everywhere. + (visit_phi_node): Add debugging dumps. + Also visit PHI arguments. + Remove basic block argument + (visit_expression): Re-implement. + (examine_flow_edges): Add debugging dumps. + (ssa_ccp_substitute_constants): Add debugging dumps. + Update comments. + Mark and fold expressions with substituted constants. + * tree-ssa.c (search_fud_chains): Don't check if BB_REFS(bb) is + empty before iterating. + Add comment explaining how we chain PHI node arguments to their + originating basic block. + + * Makefile.in (tree-cfg.o, tree-dfa.o, tree-ssa-ccp.o): Update + dependencies. + +2002-07-29 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (tree_perform_ssapre): Ben forgot to add a + dump_begin call when he removed the before dump. + +2002-07-24 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ecr.c (ECR_new_with_type): Use correct number in mapping. + +2002-07-23 Daniel Berlin <dberlin@dberlin.org> + + * c-simplify.c (simplify_for_stmt): Deep copy the result of the + tail_expression, so it's unshared. + +2002-07-23 Daniel Berlin <dberlin@dberlin.org> + + * tree-flow.h: Add prototype for create_alias_vars. + + * tree-alias-steen.c (display_points_to_set): New function. + (init_alias_vars): Display points to sets when we are done. + + * disjoint-set.h (disjoint_set_def): ptr_alias to ECR_def so that + we mark parent properly. + +2002-07-24 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (GTFILES): Move tree-alias-type.[ch], + tree-alias-ecr.[ch], tree-alias-steen.[ch] from ... + * c-config-lang.in (gtfiles): ... here. + + * tree-simple.c (is_simplifiable_builtin): Replace + BUILT_IN_VARARGS_START with BUILT_IN_VA_START. + +2002-07-23 Andreas Jaeger <aj@suse.de> + + * tree-ssa-pre.c (hash_expr_tree): Remove. + + * c-call-graph.c (write_dtd): Remove. + + * tree-ssa.c (delete_refs): Remove. + +2002-07-23 Andreas Jaeger <aj@suse.de> + + * gengtype.c (open_base_files): Add tree.h. + + * tree-alias-type.h: Remove inclusion of tree.h. + + * tree-alias-steen.c: Include tree.h. + Add prototype for create_fun_alias_var_ptf. + + * tree-alias-ecr.c: Add prototype for ECR_add_pending. + + * tree-ssa-pre.c (calculate_preorder): Remove unused variables. + + * tree-simple.c: Include expr.h and rtl.h for prototypes. + + * tree-optimize.c: Include tree-alias-steen.h for prototypes. + + * Makefile.in (tree-optimize.o): Add tree-alias-steen.h. + (tree-simple.o): Add expr.h and rtl.h. + (tree-alias-steen.o): Add tree.h. + + * diagnostic.h: Add declaration of debug_output_buffer. + + * c-call-graph.c (construct_call_graph): Make static to follow + declaration. + (construct_call_graph): Use #if 0 instead of C++ comments to + disable code. + +2002-07-20 Andreas Jaeger <aj@suse.de> + + * doc/invoke.texi (Option Summary): Fix syntax. + +2002-07-19 Jason Merrill <jason@redhat.com> + + * c-simplify.c (simplify_return_stmt): Do simplify a returned + expression in a void function. + + * c-simplify.c (simplify_stmt_expr): Handle C++ return semantics. + +2002-07-19 Jason Merrill <jason@redhat.com> + + * c-pretty-print.c (dump_c_node) [TARGET_EXPR]: Handle. + [COND_EXPR]: Print a returned expression in a void function. + +2002-07-19 Ben Elliston <bje@redhat.com> + + * tree-ssa-pre.c (tree_perform_ssapre): Don't dump the original + tree before applying this optimisation. + + * flags.h (flag_dump_tree_all_ssa): New flag. + * toplev.c (flag_dump_tree_all_ssa): New flag. + (f_options): Add "dump-tree-all-ssa" option. + (process_options): Process flag_dump_tree_all_ssa. + * tree.h (dump_enable_all_ssa): Declare. + * tree-dump.c (dump_enable_all_ssa): New function. + * doc/invoke.texi (Option Summary): Add -fdump-tree-all-ssa and + -fdump-tree-ssapre options. + (Debugging Options): Describe in more detail. + * c-simplify.c (c_simplify_function_tree): Dump the original tree + only if a TDI_original dump is requested, rather than TDI_simple. + + * tree-dump.c (dump_begin): Include phase number in dump filename. + +2002-07-18 Ben Elliston <bje@redhat.com> + + * tree-dump.c (dump_files): Rename "unparse" to "raw". + * tree.h (TDF_UNPARSE): Rename from this .. + (TDF_RAW): .. to this. + * tree-ssa-pre.c (tree_perform_ssapre): Use TDF_RAW and invert the + logical sense of this flag. + * tree-ssa-ccp.c (tree_ssa_ccp): Likewise. + * c-simplify.c (c_simplify_function_tree): Likewise. + +2002-07-18 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c (calculate_preorder): New function. + (tree_perform_ssapre): Use it, rather than + flow_compute_preorder_tranversal, which seems to not do + what we want. + +2002-07-18 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-type.c: Move gt-tree-alias-type include to end of file. + + * tree-alias-steen.c: Move gt-tree-alias-steen include to end of file. + +2002-07-18 Daniel Berlin <dberlin@dberlin.org> + + * gengtype.c (get_base_file_bitmap): Mark tree-alias-* and + disjoint-set* as c/c++/objc files only. + + * Makefile.in (gt-tree-alias-type.h): Add. + (tree-alias-type.o): Add dependency on gt-tree-alias-type.h. + + * tree-alias-type.c: Include gt-tree-alias-type.h. + (alias_bottom): Add a GTY marked version of alias_bottom here. + + * tree-alias-type.h: Remove the GTY marker from alias_bottom. + +2002-07-17 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ecr.c (ECR_union_pending_sets): Only clear bitmap if + it's not NULL. + +2002-07-16 Jason Merrill <jason@redhat.com> + + * c-simplify.c (add_tree): Build an EXPR_STMT immediately. + (convert_to_stmt_chain): Remove. + (simplify_stmt, simplify_for_stmt, simplify_while_stmt, + simplify_do_stmt, simplify_expr_wfl, tail_expression): Adjust. + +2002-07-17 Daniel Berlin <dberlin@dberlin.org> + + * tree-alias-ecr.c: New file. Equivalence Class Representation. + + * tree-alias-steen.c: New file. Steengaard Alias Analysis. + + * disjoint-set.c: New file. Disjoint set data structure. + + * tree-alias-type.c: New file. Alias types. + + * c-simplify.c (create_tmp_alias_var): New function, like + create_tmp_var, but doesn't add it to the current binding. + + * tree-simple.h: Prototype for create_tmp_alias_var. + + * tree-optimize.c (build_tree_ssa): Create alias variables, if + requested. + + * flags.h: Add flag_tree_points_to. + + * toplev.c: Ditto. + + * gengtype.c (open_base_files): Add disjoint-set.h, + tree-alias-ecr.h, tree-alias-type.h, tree-flow.h. + + * Makefile.in (C_AND_OBJC_OBJS): Add disjoint-set.o, + tree-alias-ecr.o, tree-alias-type.o, tree-alias-steen.o. + (tree-alias-steen.o): Add dependencies. + (tree-alias-ecr.o): Ditto. + (tree-alias-type.o): Ditto. + (disjoint-set.o): Ditto. + +2002-07-10 Daniel Berlin <dberlin@dberlin.org> + Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (C_AND_OBJC_OBJS): Add tree-ssa-ccp.o + * flags.h (flag_tree_ssa_ccp): Declare. + * fold-const.c (eval_subst): Make extern. + * toplev.c (flag_tree_ssa_ccp): Define. + (f_options): Document -ftree-ssa-ccp. + * tree-dump.c (dump_files): Add -fdump-tree-ccp. + * tree-flow.h (tree_perform_ssapre): Move declaration ... + * tree-optimize.h: ... here. + (tree_ssa_ccp): Declare. + * tree-optimize.c (optimize_function_tree): Call tree_ssa_ccp. + * tree-ssa-ccp.c: New file. + * tree.c (next_decl_uid): Remove static declaration. + * tree.h (next_decl_uid): Declare. + (tree_dump_index): Add TDI_ccp. + * cp/Make-lang.in (CXX_C_OBJS): Add tree-ssa-ccp.o. + * doc/invoke.texi: Document -ftree-ssa-pre and -ftree-ssa-ccp. + +2002-07-09 Daniel Berlin <dberlin@dberlin.org> + + s/varrays of refs/ref_list of refs/g + + * tree-flow.h: Add ref_list structure. + Add prototypes for ref_list functions. + (FOR_EACH_REF, FOR_EACH_REF_REV): New macros to iterate through + ref lists. + * tree-cfg.c, tree-ssa.c, tree-ssa-pre.c: Update all uses. + + * tree-dfa.c (create_ref_list): New function. + (delete_ref_list): Ditto. + (empty_ref_list): Ditto. + (add_ref_to_list_end): Ditto. + (add_ref_to_list_begin): Ditto. + (remove_ref_from_list): Ditto. + +2002-07-04 Diego Novillo <dnovillo@redhat.com> + + * tree-simple.c (is_simplifiable_builtin): Don't simplify target + builtins. + +2002-07-03 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_decl_stmt): Unshare the + initializer nodes before simplification. + +2002-06-29 Aldy Hernandez <aldyh@quesejoda.com> + Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_call_expr): Do not bail on all builtins. + (is_simple_call_expr): Same. + (simplify_addr_expr): New function. + (simplify_expr): Call it. + + * tree-simple.c (is_simplifiable_builtin): New. + (is_simple_compound_lval): Do not bail on INDIRECT_REF. + + * tree-simple.h: New prototype for is_simplifiable_builtin. + +2002-06-26 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa.c (tree_build_ssa): Call free_dominance_info, not + free, on idom. + + * tree-ssa-pre.c (compute_domchildren): Update to use new + dominance_info structure, rather than idom array. + (tree_perform_ssapre): Don't forget to free the dominance info. + + s/VARRAY_FREE/VARRAY_CLEAR/g now that VARRAY's are ggc allocated. + +2002-06-24 Diego Novillo <dnovillo@redhat.com> + + * tree-ssa.c (build_fud_chains): Use dominance_info instead of int *. + (search_fud_chains): Ditto. + Call get_immediate_dominator. + * tree-ssa-pre.c (a_dom_b): Call dominated_by_p. + (pre_idom): Change type to dominance_info. Update all uses. + (pre_doms): Remove. Update all uses. + +2002-06-20 Jason Merrill <jason@redhat.com> + + Simplify DECL_STMT, CONSTRUCTOR and COMPOUND_LITERAL_EXPR. + * tree-simple.c (is_simple_decl_stmt): New fn. + (is_simple_constructor, is_simple_constructor_elt): New fns. + (is_simple_stmt, is_simple_unary_expr): Use them. + (is_simple_modify_expr): Accept an INIT_EXPR. + (is_simple_id): Don't allow a COMPOUND_LITERAL_EXPR. + (is_simple_unary_expr): Here either. + * c-simplify.c (simplify_decl_stmt, simplify_constructor): New fns. + (simplify_compound_literal_expr): New fn. + (simplify_stmt, simplify_expr): Use them. + (get_initialized_tmp_var): Use an INIT_EXPR. + (simplify_modify_expr): Accept an INIT_EXPR. + (simplify_for_stmt): Call simplify_decl_stmt. + (get_name): Don't crash if the decl is anonymous. + (tail_expression): New fn. + * tree-simple.h: Declare new fns. + * c-pretty-print.c (dump_c_node) [INIT_EXPR]: Print like MODIFY_EXPR. + (dump_c_node, op_prio): Handle COMPOUND_LITERAL_EXPR. + * c-simplify.c (simplify_expr_wfl): Only wrap pre and post stuff + that came from our subexpression. + (simplify_stmt): Restore stmts_are_full_exprs_p. + + * c-simplify.c (simplify_expr_wfl): Bracket substatements with + FILE_STMTs rather than wrapping them in EXPR_WITH_FILE_LOCATION. + (simplify_stmt): Update lineno and input_filename from stmts. + (simplify_expr et al): Don't copy lineno between stmts. Don't pass + enclosing stmt down. + (update_line_number): Remove. + + * c-simplify.c (simplify_expr_stmt): Don't check + is_last_stmt_of_scope. + (simplify_stmt_expr): Check it here. Set *expr_p to void_zero_node + instead of NULL_TREE. + (expr_has_effect): No need to deal with NULL exprs now. + (simplify_expr_wfl): Likewise. + +2002-06-18 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (strip_off_ending): Rename to remove_suffix. + Update callers. + (is_last_stmt_of_scope): New function. + (simplify_expr_stmt): Call it. + (stmt_has_effect): Ditto. + (c_simplify_function_tree): Update comment. + +2002-06-18 Jason Merrill <jason@redhat.com> + + * c-simplify.c (maybe_fixup_loop_cond): New fn for C++ conditions. + (simplify_for_stmt, simplify_while_stmt): Use it. + + * c-pretty-print.c (dump_c_node) [COMPONENT_REF]: Print "->" if + appropriate. + +2002-06-19 Jason Merrill <jason@redhat.com> + + * c-simplify.c (simplify_stmt_expr): New fn. + (simplify_expr): Call it. + (stmt_expr_level): Remove. + (stmt_has_effect, c_simplify_function_tree): Remove refs. + (expr_has_effect): Deal with null expression. + (simplify_expr_wfl): If the subexpression is simplified away, drop + this one, too. Don't wrap statements. + * tree-simple.c (is_simple_unary_expr): Don't allow a STMT_EXPR. + * tree-inline.c (copy_tree_r): Clear the aux field in the copies. + +2002-06-17 Frank Ch. Eigler <fche@redhat.com> + + * c-pretty-print.c (dump_c_node): Print pointer-type + integer constants as raw numbers with a "B" (bytes) suffix. + +2002-06-17 Jason Merrill <jason@redhat.com> + + * c-simplify.c (simplify_stmt): Take a tree *. + (various): Adjust. + +2002-06-16 Daniel Berlin <dberlin@dberlin.org> + + * c-simplify.c (get_name): New function. + (get_initialized_tmp_var): Use it to try to get a prefix for + create_tmp_var from the value we are initializing to. + (simplify_cond_expr): Add prefix for create_tmp_var. + (create_tmp_var): Add prefix argument. + + * tree-simple.h: Change create_tmp_var prototype to match. + + * tree-ssa-pre.c: Change create_tmp_var call. + +2002-06-15 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (c-decl.o): Add dependency on langhooks.h + (c-simplify.o): Add dependency on flags.h, langhooks.h, toplev.h + and rtl.h. + * c-decl.c: Include langhooks.h. + (c_expand_body): Simplify the function. If it succeeds and + -ftree-ssa is enabled, call optimize_function_tree. + * c-simplify.c: Include flags.h, rtl.h and toplev.h. + (simplify_expr_stmt): New function. + (simplify_stmt): Call it. + * tree-optimize.c: Don't include langhooks.h. + (optimize_function_tree): Don't call lang_hooks.simplify_function_tree. + + * c-decl.c (c_expand_body): Do not simplify nor optimize the + function if -fdisable-simple is given. + * c-simplify.c (simplify_expr): Use is_simple_addr_expr_arg when + simplifying ADDR_EXPR nodes. + * flags.h (flag_disable_simple): Declare. + * toplev.c (flag_disable_simple): Define. + (f_options): Document -fdisable-simple. + (process_options): Warn if -fdisable-simple is used with + optimization enabled. + * tree-simple.c (is_simple_addr_expr_arg): New function. + (is_simple_unary_expr): Call it. + * tree-simple.h (is_simple_addr_expr_arg): Declare. + * doc/invoke.texi: Document -fdisable-simple. + + * c-pretty-print.c (dump_c_node): Handle DECL_STMT nodes inside + FOR_INIT_STMT. + * c-simplify.c (c_simplify_function_tree): Don't do anything if the + program had errors. + (simplify_stmt): Skip DECL_STMTs. + (simplify_for_stmt): Handle DECL_STMT nodes inside FOR_INIT_STMT. + (simplify_save_expr): New function. + (simplify_expr): Call it. + (tree_last_decl): Handle cases where DECL_STMTs are found before + the body of the function. + * tree-simple.c (is_simple_stmt): Handle DECL_STMT nodes inside + FOR_INIT_STMT. + (is_simple_compound_lval): Handle nodes wrapped in NON_LVALUE_EXPR. + +2002-06-14 Frank Ch. Eigler <fche@redhat.com> + + * c-pretty-print.c (dump_c_node): Print more type qualifiers, + especially for pointers. + +2002-06-11 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c: Remove folding markers. + (insert_before_first): Remove unused function. + * tree-cfg.c: Remove folding markers. + * tree-dfa.c: Ditto. + * tree-flow.h: Ditto. + * tree-optimize.c: Ditto. + * tree-optimize.h: Ditto. + * tree-simple.c: Ditto. + * tree-ssa.c: Ditto. + +2002-06-11 Jason Merrill <jason@redhat.com> + + * c-simplify.c (add_tree): Don't deep-copy expressions. + (simplify_for_stmt): Only deep-copy pre_cond_s the first time. + Don't deep copy expr_chain. + +2002-06-10 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (remove_bb_ann): Don't call VARRAY_FREE. + * tree-dfa.c (create_ref): Use sizeof (ref) instead of + refs->element_size. + * tree.h (struct tree_common): Skip field 'aux' from GC type + information. + * tree-optimize.c (optimize_function_tree): Don't call + VARRAY_REF. + * tree-ssa.c (insert_phi_terms): Ditto. + (delete_refs): Ditto. + * c-simplify.c (simplify_array_ref): Ditto. + * simple-break-elim.c: Disable whole file. + * simple-goto-elim.c: Disable whole file. + +2002-06-10 Jason Merrill <jason@redhat.com> + + * c-simplify.c (simplify_switch_stmt): Let simplify_expr handle + post-effects. Reorder. + (simplify_if_stmt): Likewise. Don't build redundant comparison. + (simplify_do_stmt, simplify_while_stmt): Likewise. + (simplify_for_stmt): Likewise. Remove POST_P parm. + (simplify_stmt): Adjust. + (insert_before_first): #if 0, no longer used. + + * c-pretty-print.c (dump_c_node): Print FIX_TRUNC_EXPR, FLOAT_EXPR + et al as casts. Add parens as needed. + + * tree-simple.c (is_union_based_ref): New fn. + (is_simple_min_lval): Use it. Rename from is_simple_arraybase. + (is_simple_arrayref): Adjust. Use loop instead of recursion. + (is_simple_compref): Likewise. + (is_simple_compref_lhs): Remove. + * tree-simple.h: Adjust. + * c-simplify.c (simplify_array_ref): Adjust. + (simplify_component_ref): Adjust. + + * c-simplify.c (simplify_expr_common): Tweak ordering. + (get_initialized_tmp_var): Let simplify_expr handle post-effects. + * tree-simple.c (is_simple_stmt): Accept an rhs for a return expr. + + * c-simplify.c (simplify_boolean_expr): Avoid redundant tests. + Give the temp the appropriate type for a boolean value, and + reconvert at the end. + + * c-simplify.c (simplify_self_mod_expr): Don't duplicate side-effects. + + * c-simplify.c (simplify_return_stmt): Accept a SIMPLE rhs. + Just hand off to simplify_expr. + + * c-simplify.c (get_initialized_tmp_var): New fn. + (simplify_expr_common): Use it. Handle post-effects internally if + POST_P is NULL. + (is_simple_tmp_var): Rename from simple_tmp_var_p. + * tree-simple.h: Adjust. + +2002-06-09 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_return_stmt): Update folding markers. + (build_addr_expr): Ditto. + * langhooks.h (struct langhooks): Document simplify_function_tree + hook. + +2002-06-09 Jason Merrill <jason@redhat.com> + + * c-simplify.c (simplify_expr_common): Handle creating both lvalue + and rvalue temps. Add new parameter to specify which. + (simplify_expr): Now just a wrapper. + (simplify_lvalue_expr): Likewise. + (simplify_expr_either): New wrapper. + (simplify_component_ref): Use it instead of simplify_lvalue_expr. + + * c-pretty-print.c (debug_c_tree): Add a trailing newline. + (debug_c_node): Likewise. + * gdbinit.in (pct): New macro, calls debug_c_tree. + +2002-06-08 Jason Merrill <jason@redhat.com> + + * tree-simple.c (is_simple_unary_expr): Only allow the address of + a varname. + (is_simple_id): Allow STRING_CST. + * c-simplify.c (simplify_expr_common): Split out from simplify_expr. + Do simplify ADDR_EXPR. + (simplify_lvalue_expr): Use it and build_addr_expr. Take + simple_test_f. + (simplify_modify_expr): Adjust. + (build_addr_expr): New fn. + (simplify_array_ref): Use simplify_lvalue_expr. + (simplify_component_ref): Likewise. + + * tree-simple.c (is_simple_rhs): Remove condexpr rule. + (is_simple_compref_lhs): Remove &ID.idlist rule. + (is_simple_relop): New fn. + (is_simple_binary_expr, is_simple_condexpr): Use it. + * tree-simple.h: Declare it. + + * c-simplify.c (create_tmp_var): Refuse to create an array temp. + (simple_tmp_var_p): New fn. + (simplify_lvalue_expr): Use it; make sure we don't return a temp. + * tree-simple.h: Declare it. + + * c-pretty-print.c (dump_c_node) [ARRAY_REF]: Wrap array in parens + as needed. + [COMPONENT_REF]: Likewise. + [POINTER_TYPE]: Fix pointer-to-function handling. + [ARRAY_TYPE]: Don't try to print an unknown dimension. + + * tree-simple.c (is_simple_arraybase): New function. + (is_simple_arrayref): Use it to check the array base again. + * tree-simple.h: Add declaration. + * c-simplify.c (simplify_array_ref): Do simplify the base. + * expr.c (expand_expr): First make sure the type has a size. + +2002-06-07 Jason Merrill <jason@redhat.com> + + * cppexp.c (num_equality_op): Use a temporary variable to work + around gcc 3.0.4 bug. + +2002-06-05 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (BOOT_CFLAGS): Remove -ftree-ssa. + * c-decl.c (c_expand_body): Call optimize_function_tree if tree SSA + is enabled. + * c-lang.c (LANG_HOOKS_SIMPLIFY_FUNCTION_TREE): Define. + * c-simplify.c (simplify_tree): Rename to c_simplify_function_tree. + Update all callers. + Dump function body before and after simplification if + -fdump-tree-simple is used. + (simplify_expr): Document FIXME for simplification of BIT_FIELD_REF + nodes. + * c-tree.h (simplify_tree): Rename to c_simplify_function_tree. + * langhooks-def.h (LANG_HOOKS_SIMPLIFY_FUNCTION_TREE): Define + (LANGHOOKS_INITIALIZER): Add LANG_HOOKS_SIMPLIFY_FUNCTION_TREE. + (lhd_simplify_function_tree): Declare. + * langhooks.c (lhd_simplify_function_tree): New function. + * langhooks.h (lang_hooks): Add simplify_function_tree function + pointer. + * toplev.c (parse_options_and_default_flags): Set flag_tree_ssa to + 1 at optimization levels >= 1. + Revert to default warning when -Wuninitialized is used without -O. + * tree-cfg.c (tree_find_basic_blocks): Rename argument 't' to + 'fnbody'. + * tree-optimize.c: Include langhooks.h. + (optimize_tree): Rename to optimize_function_tree. Update all + users. + Rename argument 't' to 'fndecl'. + Call simplify langhook before building SSA. + (build_tree_ssa): Rename argument 't' to 'fndecl'. + Adjust call to tree_find_basic_blocks to pass body of the function. + * tree-optimize.h (optimize_tree): Rename to + optimize_function_tree. + * tree-simple.c (is_simple_unary_expr): Document FIXME on + BIT_FIELD_REF nodes. + * tree-ssa.c: Add whitespace. + * testsuite/lib/c-torture.exp: Remove -ftree-ssa flag. + +2002-06-03 Daniel Berlin <dberlin@dberlin.org> + + * tree-cfg.c (insert_before_*): For insertion into FOR_INIT's, if + we have an expression statement, transform into a compound + expression. + Pick the right place to insert a statement by iterating until we + have a first_exec_stmt (first_non_decl_stmt) that is really the + first executable non decl statement. + (insert_after_*): Ditto. + +2002-06-03 Daniel Berlin <dberlin@dberlin.org> + + * tree-ssa-pre.c: Update BB stuff to new basic block structure. + Add some comments throughout (more coming, particularly describing + the algorithm, rather than the implementation). + (free_expr_info): Free refs as well. + (defs_y_dom_x): Handle unary expressions as well. + (insert_euse_in_preorder_dt_order_1): Use block of ref, not block + of statement. + Don't insert exit blocks if we hit them before hitting an + occurrence (it's pointless). + (rename_2): Return set of phi operands we touched, don't forget to + free VARRAY's we allocated. + (rename_1): Correct downsafety computation. Now get exact same + results as Open64. + Correct setting of has_real_use. + (finalize_1): Fix up insertion. + (code_motion): Fix up insertion. + + * tree-dfa.c (dump_varref): Improve dumping of expression + references. + +2002-06-03 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (delete_bb): Rename to tree_delete_bb. Update callers. + (tree_find_basic_blocks): Initializer last_basic_block. + (create_bb): Update last_basic_block after creating a new block. + (tree_cleanup_cfg): Delete unreachable blocks by traversing the + linked list, not the array. Update comments. + (delete_bb): Update comments. + (tree_dump_cfg): Also show last_basic_block. + * tree-ssa.c (tree_build_ssa): Use last_basic_block instead of + n_basic_blocks to allocate dominator arrays. + (insert_phi_terms): Ditto. + (search_fud_chains): User FOR_EACH_BB to look for dominator + children. + +2002-05-29 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (tree_find_basic_blocks): Set next_bb and prev_bb for + ENTRY_BLOCK_PTR and EXIT_BLOCK_PTR. + (create_bb): Set flag BB_NEW for every newly created block. + Call link_block to add the new block to the linked list. + (tree_split_bb): Traverse basic blocks using FOR_EACH_BB. + (make_goto_stmt_edges): Ditto. + (remove_unreachable_blocks): Add reminder comment to stop + compacting the basic block array every time a block is deleted. + (delete_cfg): Traverse basic blocks using FOR_EACH_BB. + (tree_dump_bb): Ditto. + (tree_dump_cfg): Ditto. + (tree_cfg2dot): Ditto. + * tree-dfa.c (tree_find_varrefs): Ditto. + (create_tree_ann): Ditto. + (get_fcalls): Ditto. + (find_declaration): Ditto. + * tree-ssa.c (tree_build_ssa): Ditto. + +2002-05-28 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in: Add -ftree-ssa to BOOT_CFLAGS. + +2002-05-27 Diego Novillo <dnovillo@redhat.com> + + * c-decl.c (c_expand_body): Close dump file before simplifying the + function. + * c-pretty-print.c (dump_c_node): Handle COMPLEX_CST, + BIT_FIELD_REF, COMPLEX_EXPR, CONJ_EXPR, REALPART_EXPR, + IMAGPART_EXPR and VA_ARG_EXPR nodes. + Display all type casts, not just pointer casts. + (op_prio): Handle LROTATE_EXPR, RROTATE_EXPR, REALPART_EXPR and + IMAGPART_EXPR. + * c-simplify.c: Include "tree-inline.h" + (dump_file): New local variable. + (dump_flags): New local variable. + (stmt_expr_level): New local variable. + (simplify_tree): Open and close dump file if + -fdump-tree-simple-details is given. + Initialize stmt_expr_level. + (simplify_stmt): Dump statement before and after simplification if + -fdump-tree-simple-detail is given. + Unshare the expression of an EXPR_STMT before simplifying it. + Call simplify_return_stmt to handle RETURN_STMT nodes. + Do not simplify DECL_STMT nodes. + Call stmt_has_effect before re-chaining side effects. + (simplify_for_stmt): Do not return the simplified statement. + Update all callers. + Simplify FOR_BODY after the headers. + Unshare loop header expressions before simplification. + (simplify_while_stmt): Do not return the simplified statement. + Update all callers. + Simplify WHILE_BODY after the headers. + Unshare the loop header expression before simplification. + (simplify_do_stmt): Do not return the simplified statement. Update + all callers. + Unshare the loop header expression before simplification. + (simplify_if_stmt): Do not return the simplified statement. Update + all callers. + Simplify the condition expression before the clauses. + Unshare the condition expression before simplification. + (simplify_switch_stmt): Do not return the simplified statement. + Update all callers. + Simplify the switch expression before the body. + Unshare the switch expression before simplification. + (simplify_decl_stmt): Remove. + (simplify_expr): Remove argument 'needs_lvalue'. + Add argument 'stmt'. + Replace first argument 'expr' with a pointer to the + expression 'expr_p'. + Do not return the simplified expression. + Update all callers and uses. + Handle TRUTH_NOT_EXPR nodes. Simplify SAVE_EXPR nodes into a + SIMPLE id and remove the SAVE_EXPR node. + Do not simplify BIT_FIELD_REF nodes. + Remove code that tried to create new lvalues. + (simplify_array_ref): Replace first argument 'expr' with a pointer + to the expression 'expr_p'. + Do not return the simplified expression. + Add argument 'stmt'. + Update all callers and uses. + (simplify_self_mod_expr): Replace first argument 'expr' with a + pointer to the expression 'expr_p'. + Do not return the simplified expression. + Add argument 'stmt'. + Update all callers and uses. + Call simplify_lvalue_expr to simplify a copy of the LHS into an + lvalue for the new assignment. + Simplify the new binary expression. + (simplify_component_ref): Replace first argument 'expr' with a + pointer to the expression 'expr_p'. + Do not return the simplified expression. + Add argument 'stmt'. + Update all callers and uses. + (simplify_call_expr): Ditto. + (simplify_tree_list): Ditto. + (simplify_cond_expr): Ditto. + Build a replacement IF_STMT and call simplify_if_stmt() to process + it. Set the line number of the new statement from the statement + containing the original expression. + (simplify_modify_expr): Replace first argument 'expr' with a + pointer to the expression 'expr_p'. + Do not return the simplified expression. + Add argument 'stmt'. + Update all callers. + Call simplify_lvalue_expr to simplify the LHS of the assignment. + (simplify_boolean_expr): Replace first argument 'expr' with a + pointer to the expression 'expr_p'. + Do not return the simplified expression. + Add argument 'stmt'. + Update all callers. + Build a new IF_STMT and simplify it all at once by calling + simplify_if_stmt. + (simplify_compound_expr): Replace first argument 'expr' with a + pointer to the expression 'expr_p'. + Do not return the simplified expression. + Add argument 'stmt'. + Update all callers. + (simplify_expr_wfl): Ditto. + (simplify_lvalue_expr): New function. + (add_tree): Create a copy of each expression before adding it to + the list. + (deep_copy_node): Call copy_tree_r to copy expression nodes. + (stmt_has_effect): Return nonzero if the statement may be the last + statement of a statement expression body. + (mostly_copy_tree_r): New function. + * tree-dump.c (dump_options): Add 'details'. + * tree-simple.c: Update documentation about ADDRESSOF expressions. + (is_simple_stmt): Test for SIMPLE values when checking return + statements. + Accept all DECL_STMT nodes. + (is_simple_compstmt): Return nonzero if T is NULL. Do not test + DECL_STMT nodes + (is_simple_expr): Return nonzero if T is NULL. + (is_simple_rhs): Ditto. + (is_simple_modify_expr): Ditto. + (is_simple_modify_expr_lhs): Ditto. + (is_simple_binary_expr): Ditto. + (is_simple_cond_expr): Ditto. + (is_simple_unary_expr): Call STRIP_NOPS before testing T. + Always accept ADDR_EXPR nodes. + Always accept BIT_FIELD_REF nodes. + (is_simple_call_expr): Return nonzero if T is NULL. + (is_simple_const): Ditto. + (is_simple_val): Ditto. + (is_simple_compref): Ditto. + (is_simple_compref_lhs): Ditto. + (is_simple_cast): Ditto. + (is_simple_cast_op): Ditto. + (is_simple_id): Return nonzero if T is NULL. Allow identifiers + wrapped inside NON_LVALUE_EXPR and EXPR_WITH_FILE_LOCATION nodes. + Allow real and imaginary parts of a complex variable. + Allow compound literals. + (is_simple_arrayref): Allow arrays of complex types. + * tree.h (TDF_DETAILS): Define. + * cp/pt.c (tsubst_template_parms): Check that 'parms' is non-NULL + before calling TMPL_PARMS_DEPTH. + * doc/invoke.texi: Document -fdump-tree-simple-details. + +2002-05-10 Daniel Berlin <dberlin@dberlin.org> + + * c-pretty-print.c (dump_c_node): Print "<unnamed whatever>" for + types, variables, etc that have no name, rather than printing + nothing. + Handle PMF's properly. + Print out structure initializers in a somewhat sensible way. + Print SAVE_EXPR () around SAVE_EXPRs. + (print_call_name): Handle EXPR_WITH_FILE_LOCATION. + +2002-05-09 Daniel Berlin <dberlin@dberlin.org> + + * tree-dfa.c (dump_varref): Tree inlining generates variables with + no name. Don't crash on dumping varref's of them. + + * tree-inline.c (expand_call_inline): Generate a proper STMT_EXPR + (it was missing COMPOUND_STMT). + +2002-05-08 Daniel Berlin <dberlin@dberlin.org> + + s/varref_type/treeref_type/g + s/create_varref/create_ref/g + + * tree-flow.h: Add EXPRPHI, EXPRUSE, EXPRKILL, EXPRINJ. + Add structures and macros for each. + Add tree_perform_ssapre prototype. + + * Makefile.in (C_AND_OBJC_OBJS): Add tree-ssa-pre.o + (tree-ssa-pre.o): Add dependencies for tree-ssa-pre.o + + * cp/Make-lang.in: Add tree-ssa-pre.o + + * flags.h: Add flag_tree_ssa_pre. + + * tree-ssa-pre.c: New file, SSA-PRE. + + * toplev.c: Add flag_tree_ssa_pre. + (lang_independent_options): Add tree-ssa-pre. + + * tree-dump.c (dump_files): Add ssapre dump. + + * tree-optimize.c (optimize_tree): Do SSAPRE if requested. + + * tree.h (dump_index): Add TDI_ssa_pre. + + * tree-dfa.c (create_ref): Add support for creating the EXPR*'s refs. + (dump_varref): Add support for dumping EXPR* refs. + + * tree-ssa.c (search_fud_chains): Add BB to VARDEF_PHI_CHAIN_BB. + +2002-05-07 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c (op_prio): Handle ABS_EXPR. + Don't abort when the operand is not recognized. + (op_symbol): Don't abort when the operand is not recognized. + * c-simplify.c (simplify_expr): Remove 'const' qualifier from first + argument. + Do not copy incoming expression. + Exclude handling of MODIFY_EXPR, INIT_EXPR, SAVE_EXPR and binary + expression nodes. + (simplify_array_ref): Remove 'const' qualifier from first argument. + Do not copy the incoming expression. + (simplify_self_mod_expr): Ditto. + Do not simplify the first operand twice. + (simplify_component_ref): Remove 'const' qualifier from first + argument. Do not copy the incoming expression. + (simplify_call_expr): Ditto. + (simplify_tree_list): Ditto. + (simplify_cond_expr): Ditto. + (simplify_modify_expr): Ditto. + (simplify_boolean_expr): Ditto. + (simplify_compound_expr): Ditto. + (simplify_save_expr): Ditto. + (simplify_expr_wfl): Ditto. + (tree_build_scope): Re-write. Do nothing if block already contains + a scope. Use chainon to chain the body with the scope closing + node. + (deep_copy_node): Do not check for NULL nodes. Do not deep copy + declarations, types and constants. + +2002-05-06 Daniel Berlin <dberlin@dberlin.org> + + * c-simplify.c (deep_copy_node): Don't copy DECL_STMT_DECL's. + +2002-05-06 Daniel Berlin <dberlin@dberlin.org> + + * tree-simple.c (is_simple_compstmt): Don't post-initialize + statics or aggregate initializers. + + * c-simplify.c (simplify_decl_stmt): Ditto. + +2002-05-06 Sebastian Pop <s.pop@laposte.net> + + * Makefile.in (simple-break-elim.o, simple-goto-elim.o, tree-dchain.o): + Added. + * c-decl.c: Include tree-dchain.h + (c_expand_body): Add entry point to the goto, break elimination + after the simplification pass. + * simple-break-elim.c: New file. + * simple-goto-elim.c: New file. + * tree-dchain.h: New file. + * tree-dchain.c: New file. + +2002-05-02 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_expr): Constify first argument. + Always work on a copy of the input expression. + Do not simplify COMPOUND_LITERAL_EXPR nor CONSTRUCTOR nodes. + (simplify_array_ref): Constify first argument. Always work on a + copy of the input expression. + (simplify_self_mod_expr): Ditto. + (simplify_component_ref): Ditto. + (simplify_call_expr): Ditto. + (simplify_tree_list): Ditto. + (simplify_cond_expr): Ditto. + When building the THEN_CLAUSE and ELSE_CLAUSE for the new IF_STMT, + create a scope for them and simplify the scope, not the expression. + (simplify_modify_expr): Constify first argument. Always work on a + copy of the input expression. + (simplify_boolean_expr): Ditto. + (simplify_compound_expr): Ditto. + (simplify_save_expr): Ditto. + (simplify_expr_wfl): Ditto. + * tree-cfg.c (tree_find_basic_blocks): Update comments for + -fdump-tree-dot. + (tree_dump_cfg): Ditto. + * tree-dump.c (dump_files): Rename -fdump-tree-graphviz to + -fdump-tree-dot. + * tree-simple.c (is_simple_unary_expr): Do not handle &CONST + expressions. + Handle COMPOUND_LITERAL_EXPR and CONSTRUCTOR nodes. + (is_simple_const): Strip NOPS and handle &CONST expressions. + * tree.h (enum tree_dump_index): Remove references to GraphViz. + * doc/invoke.texi: Update documentation for -fdump-tree-dot. + +2002-05-02 Sebastian Pop <s.pop@laposte.net> + + * c-pretty-print.c (dump_c_node): Don't print declarations + from the SCOPE_STMT_BLOCK, use the DECL_STMT instead. + +2002-04-30 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c (NIY): Display an error string instead of aborting. + (op_prio): Add support for COMPOUND_EXPR, TRUTH_XOR_EXPR, MIN_EXPR, + MAX_EXPR and NON_LVALUE_EXPR. + For EXPR_WITH_FILE_LOCATION nodes, return the priority of + the internal node. + (op_symbol): Add support for TRUTH_XOR_EXPR. + * c-simplify.c (simplify_stmt): Only remove null statements that + have been nullified by simplification. + Call debug_tree() dump unhandled tree nodes. + (simplify_for_stmt): Always deep-copy PRE_COND_S before adding it + to PRE_P. + (simplify_expr): When simplifying a MODIFY_EXPR node into an + rvalue, return operand 0. + Handle VA_ARG_EXPR, BIT_FIELD_REF and NON_LVALUE_EXPR nodes. + Treat TRUTH_AND_EXPR, TRUTH_OR_EXPR and TRUTH_XOR_EXPR nodes as + regular binary expressions. + Call debug_tree() to dump an unhandled expression. + (simplify_array_ref): Do not simplify the base of an array. + (simplify_call_expr): Do not simplify calls to builtins. + (simplify_cond_expr): Handle conditional expressions of type void. + (simplify_boolean_expr): Return 'T != 0' instead of 'T'. + (simplify_save_expr): Do not wrap statement trees inside SAVE_EXPR + nodes. + (tree_last_decl): Ignore FILE_STMT nodes preceding a SCOPE_STMT. + * tree-simple.c: Update grammar to accept any valid C array as the + array base. + (is_simple_compstmt): Accept DECL_INITIAL expressions for read-only + variables. + (is_simple_expr): Do not abort if the incoming tree is NULL. + (is_simple_modify_expr): Allow SAVE_EXPR, EXPR_WITH_FILE_LOCATION + and NON_LVALUE_EXPR wrappers. + (is_simple_binary_expr): Ditto. + (is_simple_condexpr): Ditto. + Accept TRUTH_AND_EXPR, TRUTH_OR_EXPR and TRUTH_XOR_EXPR. + (is_simple_unary_expr): Do not abort it the incoming tree is NULL. + Allow SAVE_EXPR, EXPR_WITH_FILE_LOCATION and NON_LVALUE_EXPR + wrappers. + Handle BIT_FIELD_REF and VA_ARG_EXPR nodes. + (is_simple_call_expr): Always return 1 for builtin calls. + (is_simple_arrayref): Do not check the array base. + +2002-04-30 Daniel Berlin <dberlin@dberlin.org> + + * c-simplify.c (simplify_call_expr): Don't try to simplify + call_expr arglist if it's not there. + +2002-04-27 Diego Novillo <dnovillo@redhat.com> + + * c-decl.c (c_expand_body): Call simplify_tree to simplify a + FUNCTION_DECL node. + * c-simplify.c (simplify_tree): New function. + (simplify_stmt): Remove variable 'new_vars'. Update all called + functions. + Remove argument 'scope'. Update all callers. + Do not keep track of new scope statements as they are entered. + Do not call declare_tmp_vars(). + (simplify_for_stmt): Remove argument new_vars_p. Update all callers. + (simplify_while_stmt): Ditto. + (simplify_do_stmt): Ditto. + (simplify_if_stmt): Ditto. + (simplify_switch_stmt): Ditto. + (simplify_decl_stmt): Reformat comments. + (simplify_expr): Remove argument new_vars_p. Update all callers. + Call simplify_save_expr() to simplify SAVE_EXPR nodes. + Call simplify_expr_wfl() to simplify EXPR_WITH_FILE_LOCATION nodes. + Do not call is_unop() and is_binop() when checking for unary and + binary operators. + Do not return early after simplify statement-expressions. + Do not call add_modify_stmt() to create assignment expressions. + (simplify_array_ref): Remove argument new_vars_p. Update all callers. + (simplify_self_mod_expr): Ditto. + (simplify_component_ref): Ditto. + (simplify_call_expr): Ditto. + (simplify_tree_list): Ditto. + (simplify_cond_expr): Ditto. + (simplify_modify_expr): Ditto. + (simplify_boolean_expr): Ditto. + (simplify_compound_expr): Ditto. + (simplify_save_expr): New function. + (simplify_expr_wfl): New function. + (tree_build_scope): Reformat. + (add_tree): Call stmt_has_effect() and expr_has_effect() to decide + whether or not to add a new tree to the list. + (add_modify_stmt): Remove. + (create_tmp_var): Remove 'new_vars_p' argument. + Call pushdecl() to insert the newly created variable in the current + binding scope. + (declare_tmp_vars): Do not create a BLOCK_VARS for the scope. + (is_binop): Remove. + (is_unop): Remove. + (expr_has_effect): New function. + * c-tree.h (simplify_tree): Remove second argument. + * stmt.c (warn_if_unused_value): Check operand 0 of SAVE_EXPR + nodes. + * tree-dfa.c (find_refs_in_expr): Call find_refs_in_expr() to look + inside an EXPR_WITH_FILE_LOCATION node. + * tree-simple.c (is_simple_stmt): Add a case for SCOPE_STMT nodes. + (is_simple_compstmt): Assume that T is the first tree in the + compound statement's body. + Stop when a scope ending SCOPE_STMT node is found. + (is_simple_binary_expr): Don't call is_simple_binop(). + (is_simple_condexpr): Don't call is_simple_relop(). + (is_simple_binop): Remove. + (is_simple_relop): Remove. + (is_simple_unary_expr): Accept any operator with tree code class + '1' followed by a simple value. + Accept simple unary expressions wrapped inside SAVE_EXPR, + EXPR_WITH_FILE_LOCATION and NON_LVALUE_EXPR nodes. + (is_simple_id): Accept simple identifiers wrapped inside SAVE_EXPR, + EXPR_WITH_FILE_LOCATION and NON_LVALUE_EXPR nodes. + * tree-simple.h (create_tmp_var): Remove second argument. + (is_simple_binop): Remove. + (is_simple_relop): Remove. + +2002-04-22 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (stmt_has_effect): New function. + (simplify_stmt): Fix example code in comment. + Use EXPR_STMT_EXPR to access the expression in an expression + statement. + Call debug_c_node to display unhandled statements. + Call stmt_has_effect to determine whether the statement has been + nullified by the simplification process. + (simplify_for_stmt): Do not simplify the initialization expression + if it's NULL. + Do not convert post_cond_s into a statement chain. + Do not simplify the expression if it's NULL. + (simplify_switch_stmt): initialize post_cond_s to NULL before + simplifying the expression. + (simplify_expr): Rename argument IS_LHS to NEEDS_LVALUE. Update + all uses. + When simplifying assignments, return the LHS of the assignment if + the caller wants to use the assignment as an rvalue. + Do not simplify ADDR_EXPR nodes. + Handle NOP_EXPR, CONVERT_EXPR, FIX_TRUNC_EXPR, FIX_CEIL_EXPR, + FIX_ROUND_EXPR, INDIRECT_REF, NEGATE_EXPR, INTEGER_CST, STRING_CST, + COMPLEX_CST. + Abort if the expression has not been simplified and cannot be used + as an rvalue to assign it to a temporary. + When creating a new temporary to hold an lvalue, if the expression + is an indirect reference, use the address of the referenced object. + When creating an indirect reference, use the pointed-to type as the + type of the reference. + (simplify_self_mod_expr): If the LHS operand needs to be + simplified, simplify twice. Once to produce an lvalue and another + to produce a simple value. + (simplify_modify_expr): Break assignment chains (a = b = c = ...) + into individual assignments. + (simplify_compound_expr): + (create_tmp_var): If the type is an array, use TYPE_POINTER_TO as + the pointer type. + (update_line_number): Fix typo in comment. + (is_unop): Ditto. + (convert_to_stmt_chain): Only add statements that comply with + stmt_has_effect(). + * tree-dfa.c (find_declaration): Fix typo in comment. + (debug_varref): Ditto. + * tree-flow.h: Ditto. + * tree-simple.c (is_simple_stmt): New function. + (is_simple_compstmt): New function. + (is_simple_expr): Fix typo in comment. + (is_simple_rhs): Allow conditional expressions. + (is_simple_modify_expr): Fix typo in comment. + (is_simple_modify_expr_lhs): Ditto. + (is_simple_binary_expr): Ditto. + (is_simple_condexpr): Ditto. + (is_simple_relop): Ditto. + (is_simple_unary_expr): Ditto. + Allow taking the address of a constant (for strings). + (is_simple_call_expr): Fix typo in comment. + Call is_simple_id to determine if the first operand is a SIMPLE + function identifier. + (is_simple_arglist): Fix typo in comment. + (is_simple_varname): Ditto. + (is_simple_const): Don't accept casts of SIMPLE constants. + (is_simple_id): Don't accept casts of SIMPLE identifiers. + (is_simple_val): Fix typo in comment. + (is_simple_arrayref): Ditto. + (is_simple_compref): Ditto. + (is_simple_compref_lhs): Ditto. + (is_simple_cast_op): Ditto. + (is_simple_exprseq): Allow NULL expression sequences. + * tree-simple.h (is_simple_stmt): Declare + (is_simple_compstmt): Declare. + * tree-ssa.c (follow_chain): Fix typo in comment. + +2002-04-22 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c (dump_c_node): Don't print function + bodies of FUNCTION_DECL nodes. + +2002-04-19 Andreas Jaeger <aj@suse.de> + + * Makefile.in (c-call-graph.o): New. + +2002-04-18 Sebastian Pop <s.pop@laposte.net> + + * c-pretty-print.c (PRINT_FUNCTION_NAME): Define. + (dump_c_node): Call pretty_print_string to print string. + Call print_call_name to print function names. + (pretty_print_string): New function. + (print_call_name): New function. + +2002-04-17 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_do_stmt): Call is_simple_condexpr to test + if the conditional is in SIMPLE form. + (simplify_if_stmt): Ditto. + +2002-04-17 Diego Novillo <dnovillo@redhat.com> + + * c-pretty-print.c (dump_c_node): Handle escape sequences in strings. + (op_symbol): Handle TRUTH_NOT_EXPR. + * c-simplify.c: Rename 'after' with 'post' and 'before' with 'pre' + everywhere. + Re-group some functions and add comments. + (simplify_stmt): Update calls to simplify_for_stmt, + simplify_while_stmt, simplify_do_stmt and simplify_switch_stmt. + Call simplify_if_stmt. + Do not test if expression is in SIMPLE form before calling + simplify_expr. + Call convert_to_stmt_chain to emit statement trees for side effects + found while simplifying. + (simplify_for_stmt): Re-implement. Do not change structure of the + statement. Simplify each header expression and emit side effects + at sequence points. + (simplify_while_stmt): Ditto. + (simplify_do_stmt): Ditto. + (simplify_switch_stmt): Ditto. + (new_simplified_if): Rename to simplify_if_stmt. + Call simplify_expr to simplify the conditional. + (simplify_if_stmt): New name for new_simplified_if. + (simplify_expr): Do not default simple_test_f to is_simple_expr. + If simple_test_f is not set, abort. + Handle COMPOUND_EXPR, MODIFY_EXPR, TRUTH_ANDIF_EXPR, + TRUTH_ORIF_EXPR, SAVE_EXPR and EXPR_WITH_FILE_LOCATION. + (simplify_arglist): Rename to simplify_tree_list. + (simplify_tree_list): New name for simplify_arglist. + (simplify_boolean_expr): New function. + (simplify_compound_expr): New function. + (tree_build_scope): Use SCOPE_BEGIN_P instead of TREE_LANG_FLAG_0 + to access scope operands. Use COMPOUND_BODY instead of + TREE_OPERAND to access the body of the compound statement. + (add_tree): Use a TREE_LIST container instead of directly chaining the + trees. + (add_assignment_tree): Rename to add_modify_stmt. Update all + callers. + (add_modify_stmt): New name for add_assignment_tree. + (insert_before_continue_end): Do nothing it the tree to insert is + NULL. + (copy_stmt_chain): Rename to deep_copy_list. Update all callers. + (deep_copy_list): New name for copy_stmt_chain. + (copy_stmt): Rename to deep_copy_node. Update all callers. + (deep_copy_node): New name for copy_stmt. Handle TREE_LIST + trees. + (insert_before_first): New function. + (is_binop): Add COMPOUND_EXPR. + (convert_to_stmt_chain): New function. + * tree-cfg.c (make_for_stmt_blocks): Fix comment. + * tree-simple.c (is_simple_condexpr): New function. + (is_simple_const): Allow casts of SIMPLE constants. + (is_simple_id): Allow casts of SIMPLE identifiers. + (is_simple_cast): Call is_simple_cast_op. + (is_simple_cast_op): New function. + (is_simple_exprseq): New function. + * tree-simple.h (deep_copy_list): Declare. + (deep_copy_node): Declare. + (is_simple_cast_op): Declare. + (is_simple_exprseq): Declare. + +2002-04-03 Diego Novillo <dnovillo@redhat.com> + + * c-simplify.c (simplify_expr): Add arguments simple_tree_f and + is_lhs. Update all callers. + Call simplify_call_expr, simplify_cond_expr, simplify_arglist and + simplify_modify_expr. + Call is_unop and is_binop to check for unary and binary operators. + (simplify_binary_expr): Remove. + (simplify_call_expr): New function. + (simplify_arglist): New function. + (simplify_cond_expr): New function. + (simplify_modify_expr): New function. + (keep_stmt_p): Remove. + (is_binop): New function. + (is_unop): New function. + (simplify_stmt): Don't call keep_stmt_p. + (simplify_decl_stmt): Call add_assignment_tree. + * tree-simple.c: Include c-tree.h + Add expression-statements to the SIMPLE grammar. + (is_simple_modify_expr_lhs): New function. + (is_simple_modify_expr): Call it. + (is_simple_relop): Update comment. + (is_simple_unary_expr): Allow expression-statements. + (is_simple_arglist): New function. + (is_simple_call_expr): Call it. + (is_simple_id): Accept expressions taking the address of a + function. + * tree-simple.h (is_simple_modify_expr_lhs): Declare. + (is_simple_arglist): Declare. + +2002-03-21 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (c-simplify.o): Add dependency on varray.h. + * c-simplify.c: Include varray.h. + Remove comments with SIMPLE grammar. + (simplify_array_ref): New. + (simplify_self_mod_expr): New. + (simplify_component_ref): New. + (add_assignment_tree): New. + (simplify_expr): Call simplify_array_ref to simplify array + references. + Call simplify_self_mod_expr to simplify ++, --, += and -= + expressions. + Call simplify_component_ref to simplify references to structures. + (simplify_binary_expr): Do not check whether the expression is + already in SIMPLE form. + * tree-simple.c: Document changes from original SIMPLE grammar. + (is_simple_unary_expr): Add check for *ID. + (is_simple_call_expr): Update comments. + (is_simple_const): Ditto. + (is_simple_id): Do not accept *ID expressions. + (is_simple_val): Update comments. + (is_simple_arrayref): Accept any variable name as the base address. + (is_simple_compref_lhs): New. + (is_simple_compref): Call it. + * tree-simple.h (is_simple_compref_lhs): Declare. + +2002-03-18 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (C_AND_OBJC_OBJS): Add tree-simple.o + (tree-simple.o): New rule. + * c-simplify.c (simplified_p): Remove. + (simplified_rec_p): Remove. + (simplified_condition_p): Remove. + (simplify_for_stmt): Call is_simple_expr instead of + simplified_condition_p. + (simplify_while_stmt): Ditto. + (simplify_do_stmt): Call is_simple_expr instead of simplified_p. + (new_simplified_if): Call is_simple_expr instead of + simplified_rec_p. + (simplify_decl_stmt): Update comment. + (simplify_expr): Return the original expression if it's already + in SIMPLE form. + Do not special case most binary and unary expressions. + When simplifying array references, create temporary variables to + hold the base address for the array. + Simplify COMPONENT_REF expressions separately. + Call simplify_binary_expr to handle most binary expressions. + (simplify_binary_expr): New function. + (keep_stmt_p): Call is_simple_unary_expr to determine whether the + statement should be kept or not. + * tree-simple.c: New file. + * tree-simple.h (is_simple_expr): Declare. + (is_simple_rhs): Declare. + (is_simple_modify_expr): Declare. + (is_simple_binary_expr): Declare. + (is_simple_binop): Declare. + (is_simple_relop): Declare. + (is_simple_unary_expr): Declare. + (is_simple_call_expr): Declare. + (is_simple_const): Declare. + (is_simple_id): Declare. + (is_simple_varname): Declare. + (is_simple_val): Declare. + (is_simple_arrayref): Declare. + (is_simple_compref): Declare. + (is_simple_cast): Declare. + * cp/Make-lang.in (CXX_C_OBJS): Add tree-simple.o + +2002-03-18 Diego Novillo <dnovillo@redhat.com> + + * tree-simple.h: New file. + * Makefile.in (c-simplify.o): Add dependency on tree-simple.h + * c-simplify.c: Reformat some comments. + (tree_last_decl): Declare. + +2002-03-18 Sebastian Pop <s.pop@laposte.net> + + * c-simplify.c (insert_stmt_chain): Delete. + (simplified_condition_p, insert_after_case_labels): New. + (simplify_stmt, simplify_for_stmt, simplify_while_stmt, + simplify_do_stmt, new_simplified_if, simplify_switch_stmt): + Returns a single node, generate a chain of statements to be executed + before the if, and a list of new variables. + (new_simplified_if): Simplify clauses. + (simplify_expr): Remove unused parameter scope. + +2002-03-14 Sebastian Pop <s.pop@laposte.net> + + * c-simplify.c (simplify_switch_stmt, simplify_expr): Add scope + parameter. + (simplify_while_stmt, simplify_do_stmt, simplify_for_stmt): Avoid + negating loop condition during simplification. + (new_simplified_if): Don't simplify the IF_BODY. + (copy_stmt_chain): Use copy_stmt. + (copy_stmt): New function. + +2002-02-28 Sebastian Pop <s.pop@laposte.net> + + * tree-dfa.c (find_refs_in_stmt): Changed if/else statements in + a switch. + +2002-02-28 Sebastian Pop <s.pop@laposte.net> + + * c-simplify.c (simplify_if_stmt): Deleted. + (new_simplified_if): New function. + (make_type_writable): New function. + (insert_before_continue_end): New function. + (insert_before_continue): New function. + (copy_stmt_chain): New function. + (insert_stmt_chain): New function. + (update_line_number): New function. + (simplified_p): New function. + (simplified_rec_p) New function. + (simplify_stmt): Modify the way to call simplification + of COMPOUND_STMT, FOR_STMT, WHILE_STMT, DO_STMT, IF_STMT, + and SCOPE_STMT in order to avoid to execute the code after + the switch. Add FILE_STMT, LABEL_STMT, GOTO_STMT, ASM_STMT cases. + Simplified a little the code after the switch. + (simplify_for_stmt): Change functions parameters. + Add code to simplify the FOR_INIT_STMT, FOR_COND, FOR_EXPR. + (simplify_while_stmt): Change functions parameters. + Add code to simplify the WHILE_COND. + (simplify_do_stmt): Change functions parameters. + Add code to simplify the DO_COND. + (simplify_switch_stmt): Change functions parameters. + (simplify_expr): Remove scope parameter. + Avoid to introduce a new temporary variable for an expression + that is already simplified. + ([ARRAY|COMPONENT]_REF, COND_EXPR): Handle them apart. + (TRUTH_ANDIF_EXPR, TRUTH_ORIF_EXPR): Avoid to evaluate the second + operand if the value can be deduced from the first one. + (keep_stmt_p): Add some other cases in which we don't need to keep + a statement after its simplification. + +2002-02-28 Sebastian Pop <s.pop@laposte.net> + + * Makefile.in: Add c-call-graph.o dependence. + * c-call-graph.c: New file. + * c-decl.c (c_expand_body): Add an entry point for call-graph. + * tree-dump.c (dump_files): Add the flag dump-call-graph. + * tree.h (tree_dump_index): Add TDI_xml. + +2002-02-28 Sebastian Pop <s.pop@laposte.net> + + * c-pretty-print.c (dump_c_tree): Declare it extern. + (dump_c_node): Declare it extern. + (dump_c_scope_vars): Deleted, some code moved in print_declaration (). + (print_declaration): New function. + (print_function_decl): New function. + (print_struct_decl): New function. + (INDENT_PRINT_C_NODE): Deleted. + (INDENT): New macro. + (NIY): Define the macro body in a block. + (dump_c_node): Add dumping for TREE_PURPOSE operand in TREE_LIST. + [VOID|INTEGER|REAL|COMPLEX|VECTOR|ENUMERAL|BOOLEAN|CHAR]_TYPE nodes: + insert some code from print-tree.c:print_node_brief () in order to + stabilise the type printing. + [RECORD|UNION]_TYPE nodes: Don't print their contents by default, + move the existing code in print_struct_decl (). + [POSTDECREMENT|POSTINCREMENT]_EXPR: Print the operand in post postion. + [MIN|MAX|ABS]_EXPR: New code for printing these nodes. + FOR_STMT: Don't print the FOR_BODY if it is not present. + RETURN_STMT: Don't print the return expression for a void function. + ASM_STMT: New code for printing this node. + SCOPE_STMT: Use print_declaration instead of dump_c_scope_vars. + COMPOUND_LITERAL_EXPR: Add the node as not implemented yet. + (op_prio): Fix switch indent. + Add node EXPR_WITH_FILE_LOCATION with priority 16. + (op_symbol): Fix switch indent. + +2002-01-25 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (c-pretty-print.o): Add dependency on errors.h. + * c-decl.c (c_expand_body): React to -ftree-dump-simple. + * c-pretty-print.c: Fix typo in header comment. + (NYI): Flush output buffer, dump the tree and abort. + (dump_c_node): Add unparsing code for ERROR_MARK, IDENTIFIER_NODE, + ARRAY_TYPE, UNION_TYPE, STRING_CST, CEIL_DIV_EXPR, FLOOR_DIV_EXPR, + ROUND_DIV_EXPR, TRUNC_MOD_EXPR, FLOOR_MOD_EXPR, ROUND_MOD_EXPR, + RDIV_EXPR, EXACT_DIV_EXPR, LROTATE_EXPR, RROTATE_EXPR, + BIT_ANDTC_EXPR, BIT_NOT_EXPR, UNORDERED_EXPR, SAVE_EXPR and + EXPR_WITH_FILE_LOCATION. + Unify unparsing code for common binary and unary expressions. + Handle indirect references like any other unary expression. + (dump_c_scope_vars): Remove unused variable 'context'. + Call dump_c_node to print the type. + (dump_c_indirect_ref): Remove. + (op_prio): New function. + (op_symbol): New function. + * c-simplify.c (simplify_stmt): Do not simplify a return + expression, only its second operand. + Fix capitalization in error message. + (simplify_expr): Add documentation. + Fix capitalization in error message. + * tree-dump.c (dump_files): Add entry for -fdump-tree-simple. + (dump_options): Add entry for -unparse. + * tree.h (TDI_simple): Define. + (TDF_UNPARSE): Define. + * doc/invoke.texi: Document -fdump-tree-simple. + +2002-01-23 Sebastian Pop <s.pop@laposte.net> + + * c-pretty-print.c: Clean C++ comments. + (debug_output_buffer): Remove declaration and definition. + * diagnostic.h (debug_output_buffer): Add declaration. + * diagnostic.c (debug_output_buffer): Add definition. + +2002-01-21 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (find_refs_in_stmt): Fix capitalization in error + message. + (find_refs_in_expr): Ditto. + +2002-01-20 Diego Novillo <dnovillo@redhat.com> + Sebastian Pop <s.pop@laposte.net> + + * Makefile.in: Add c-simplify.o. + * cp/Make-lang.in: Ditto. + * c-decl.c (c_expand_body): Call simplify_stmt() before + calling optimize_tree(). + * c-simplify.c: New file. + * c-tree.h (simplify_stmt): Declare. + (print_c_tree) + * tree-dfa.c (find_refs_in_stmt): Fix error message for unhandled + statement codes. + +2002-01-20 Sebastian Pop <s.pop@laposte.net> + + * Makefile.in: Add c-pretty-print.o. + * cp/Make-lang.in: Ditto. + * c-pretty-print.c: New file. + * c-tree.h (print_c_tree): Declare. + (print_c_node): Declare. + (debug_c_tree): Declare. + (debug_c_node): Declare. + +2001-12-29 Diego Novillo <dnovillo@redhat.com> + + * c-lang.c (c_post_options): Move code to enable tree-ssa + if -Wuninitialized is used ... + * c-common.c (c_common_post_options): ... here. + +2001-12-29 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-optimize.o): Don't depend on c-common.h + * tree-cfg.c: Don't include c-tree.h. Explain why we need to + include c-common.h. + * tree-dfa.c: Explain why we need to include c-common.h. + * tree-ssa.c: Ditto. + * tree-optimize.c: Don't include c-common.h + +2001-12-21 Nathan Sidwell <nathan@codesourcery.com> + + Revert my patch of 2001-07-23 for the moment. + +2001-10-15 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (create_varref): If the new reference is inside a + statement, add it to the list of references for that statement. + +2001-10-14 Diego Novillo <dnovillo@redhat.com> + + * Merge from mainline: + + Tue Sep 11 11:37:52 CEST 2001 Jan Hubicka <jh@suse.cz> + + * basic-block.h (cached_make_edge): New. + (make_edge): Remove first parameter. + * flow.c (cached_make_edge): Rename from make_edge; return + newly created edge; use obstack allocation. + (make_edge): New. + (flow_call_edges_add): Updaet make_edge call. + (add_noreturn_fake_exit_edges): Likewise. + (connect_infinite_loops_to_exit): Liekwise. + (make_label_edge, make_edges, find_sub_basic_blocks): Use + cached_make_edge. + * profile.c (branch_prob): Update make_edge call. + * ssa-dce.c (ssa_eliminate_dead_code): Likewise. + +2001-10-14 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa.o): Remove dependency on flags.h. + (tree-optimize.o): Add dependency on flags.h. + * bb-reorder.c (fixup_reorder_chain): Update call to make_edge. + * c-lang.c (c_post_options): Set flag_tree_ssa if -Wuninitialized + is given. + * ifcvt.c (find_if_case_1): Update call to make_edge. + * toplev.c (toplev_main): Do not warn about -Wuninitialized without + -O if -ftree-ssa is used. + * tree-cfg.c (dot_dump_file): Remove. + (dot_dump_flags): Remove. + (cfg_dump_file): Rename to dump_file. + (cfg_dump_flags): Rename to dump_flags. + (remove_bb_ann): New function. + (tree_find_basic_blocks): Do not open dump files at the beginning + of the function. + Do not call delete_cfg. + Create annotations for ENTRY_BLOCK_PTR and EXIT_BLOCK_PTR. + (make_for_stmt_blocks): Update FOR_INIT_STMT_BB and FOR_COND_BB + when creating the header blocks. + Create the blocks for the loop body before the expression block. + (make_while_stmt_blocks): Update END_WHILE_BB when creating the + header blocks. + Create the blocks for the loop body before the end-while block. + (make_do_stmt_blocks): Update DO_COND_BB when creating header + blocks. + Create the blocks for the loop body before the block for DO_COND. + (create_bb): When creating loop header blocks, allocate space for + the header_blocks union. + Call create_bb_ann to create a new annotation. + (remove_bb_ann): New function. + (tree_split_bb): New function. + (make_edges): Remove first argument from call to make_edge, + make_ctrl_stmt_edges, make_exit_edges, make_for_stmt_edges, + make_while_stmt_edges, make_do_stmt_edges, make_if_stmt_edges, + make_goto_stmt_edges, make_break_stmt_edges and + make_continue_stmt_edges. + When creating edges for the default label, remove the fallthru edge + that was created for the associated SWITCH_STMT entry block. + Do not call delete_unreachable_blocks. + Call tree_cleanup_cfg. + (make_ctrl_stmt_edges): Remove first argument. + (make_exit_edges): Remove first argument. + If the last element of the block is an EXPR_STMT, assume that it is + the call to a non-returning function and make an edge to the exit + block. + Do not call make_return_stmt_edges. Call make_edge directly. + (make_for_stmt_edges): Remove first argument. + Simplify the graph for infinite and zero-iteration loops. + (make_while_stmt_edges): Remove first argument. + Simplify the graph for infinite and zero-iteration loops. + (make_do_stmt_edges): Remove first argument. + Simplify the graph for infinite and one-iteration loops. + (make_if_stmt_edges): Remove first argument. + Simplify the graph for always-true and always-false conditionals. + (make_goto_stmt_edges): Remove first argument. + (make_break_stmt_edges): Remove first argument. + (make_continue_stmt_edges): Remove first argument. + (make_return_stmt_edges): Remove. + (tree_cleanup_cfg): New function. + (delete_unreachable_blocks): Do not react to -Wunreachable-code. + Write to dump file blocks that have been removed. + Call remove_edge. + (is_ctrl_altering_stmt): If the statement contains a call to a + non-returning function, return 1. + (delete_cfg): Call remove_bb_ann. Also remove annotations for + ENTRY_BLOCK_PTR and EXIT_BLOCK_PTR. + (latch_block): Use WHILE_COND_BB instead of END_WHILE_BB. + (insert_stmt_tree_before): Use cfg_dump_file instead of dump_file. + (insert_before_ctrl_stmt): Ditto. + (insert_before_normal_stmt): Ditto. + (insert_stmt_tree_after): Ditto. + (insert_after_ctrl_stmt): Ditto. + (insert_after_normal_stmt): Ditto. + (replace_expr_in_tree): Ditto. + (insert_bb_before): Ditto. + * tree-dfa.c (tree_find_varrefs): Call find_refs_in_expr when the + tree is not a statement. + (find_refs_in_stmt): Update comments. + Do not deal with FOR_STMT and DO_STMT trees separately. + When processing VAR_DECLs, call find_refs_in_expr with the + declaration, not its initial value. + (find_refs_in_expr): When processing COMPONENT_REFs and ARRAY_REFs, + recurse using the same reference type that was given by the + original caller. + (create_varref): Insert new PHI terms at the beginning of the + BB_REFS array, not the end. + * tree-flow.h (struct for_header_blocks): Declare. + (union header_blocks): Declare. + (struct bb_ann_def): Add new field 'loop_hdr'. + (BB_ANN): Re-define so that it can be used as an lvalue. + (BB_PARENT): Ditto. + (BB_REFS): Ditto. + (BB_PREV_CHAIN): Ditto. + (BB_BINDING_SCOPE): Ditto. + (BB_LOOP_HDR): Define. + (FOR_INIT_STMT_BB): Redefine using BB_LOOP_HDR. + (FOR_COND_BB): Ditto. + (FOR_EXPR_BB): Ditto. + (DO_COND_BB): Ditto. + (END_WHILE_BB): New name for WHILE_COND_BB. + (tree_warn_uninitialized): Declare. + (tree_cleanup_cfg): Declare. + (tree_split_bb): Declare. + * tree-optimize.c: Include flags.h. + (init_tree_flow): New function. + (optimize_tree): Call build_tree_ssa instead of building SSA + in-place. + (build_tree_ssa): New function. + * tree-optimize.h (build_tree_ssa): Declare. + * tree-ssa.c: Don't include toplev.h + (tree_warn_uninitialized): Define. + (tree_compute_rdefs): Do not call is_upward_exposed. Instead + traverse all the uses of each variable and warn if the use is + reached by the ghost definition. + +2001-10-10 Graham Stott <grahams@redhat.com> + + * tree-cfg.c (create_bb): Add new binding_scope parameter which allows + the binding scope either to be explicitly specified if non-zero. + (make_blocks): Update call to create_bb. + (make_for_stmt_blocks): Ditto. + (make_while_stmt_blocks): Ditto. + (make_do_stmt_blocks): Ditto. + (make_if_stmt_blocks): Ditto. + (make_switch_stmt_blocks): Ditto. + (create_maximal_bb): Ditto. + (make_edges): If a statement expression is in the last basic + block create an edge to EXIT_BLOCK_PTR and not the next block. + (insert_before_normal_stmt): Pass the appropriate binding scope to + create_bb. + +2001-10-01 Graham Stott <grahams@redhat.com> + Diego Novillo <dnovillo@redhat.com> + + * tree-optimize.c (optimize_tree): Early return if the program has + errors. + +2001-09-30 Diego Novillo <dnovillo@redhat.com> + + * tree-optimize.c (optimize_tree): Compute reaching definitions + after building SSA. + +2001-09-30 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (insert_after_ctrl_stmt): Remove unused argument. + (make_blocks): Pop top element from scope binding stack when an end + of scope statement is found. + (create_bb): Remove code for popping top element from scope binding + stack. + Do not push basic block 0 to initialize scope binding stack. + (insert_stmt_tree_after): Remove unused argument from call to + insert_after_ctrl_stmt. + (tree_dump_bb): Dump BB_BINDING_SCOPE if defined. + * doc/invoke.texi: Document debugging option -ftree-dump-ssa-rdefs. + +2001-09-29 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa.o): Update dependencies. + (tree-cfg.o): Ditto. + (tree-optimize.o): Ditto. + * basic-block.h (BB_CONTROL_EXPR): Define. + (BB_CONTROL_ENTRY): Define. + * c-common.h (TDF_RDEFS): Define. + * c-dump.c (dump_option_value_in): Add entry for TDF_RDEFS. + * tree-cfg.c: Include flags.h and c-tree.h + (binding_stack): New local variable. + (delete_block): Rename to delete_bb. + (tree_find_basic_blocks): Initialize varray 'binding_stack'. + Call make_blocks with an additional argument. + Adjust size of varray 'basic_block_info' after building CFG. + (make_blocks): Add new argument prev_chain_p. + Update all callers and callees. + Create sub-graphs for statement-expressions. + Update prev_chain_p when accessing the next tree in the chain. + (make_for_stmt_blocks): Add new argument prev_chain_p. + Update all callers and callees. + Update flags for control header blocks with BB_CONTROL_ENTRY and/or + BB_CONTROL_EXPR. + (make_while_stmt_blocks): Ditto. + (make_do_stmt_blocks): Ditto. + (make_if_stmt_blocks): Ditto. + (make_switch_stmt_blocks): Ditto. + (create_maximal_bb): Add new argument prev_chain_p. + Update all callers and callees. + (create_bb): Add new argument prev_chain_p. + Push basic block 0 the first time into the binding scope stack. + Associate the new basic block to the binding scope at the top of + the binding stack. + Push new binding scopes when a SCOPE_BEGIN statement is found. + Pop the top binding scope when a SCOPE_END statement is found. + (make_edges): Handle statement expressions. + Handle case labels preceded by scope statements in switch + statements. + (make_for_stmt_edges): Use FOR_INIT_STMT_BB, FOR_COND_BB and + FOR_EXPR_BB to access the header basic blocks. + (delete_unreachable_blocks): Call delete_bb instead of + delete_block. + (delete_block): Rename to delete_bb. + (block_invalidates_loop): Use data references to find calls to + non-pure functions. + (is_ctrl_stmt): Reformat. + (loop_body): New function. + (set_loop_body): New function. + (stmt_starts_bb_p): Statement expression trees also start a new + basic block. + (delete_cfg): Call VARRAY_FREE to delete all the references in each + basic block. + (latch_block): Use FOR_EXPR_BB, WHILE_COND_BB and DO_COND_BB to + find out the latch block for the loop. + (last_exec_stmt): New function. + (is_exec_stmt): Scope statements that begin a scope are also + considered executables. + (is_statement_expression): New function. + (first_non_decl_stmt): New function. + (first_decl_stmt): New function. + (first_non_label_in_bb): New function. + (insert_stmt_tree_before): New function. + (insert_before_ctrl_stmt): New function. + (insert_before_normal_stmt): New function. + (insert_stmt_tree_after): New function. + (insert_after_ctrl_stmt): New function. + (insert_after_normal_stmt): New function. + (insert_after_loop_body): New function. + (replace_expr_in_tree): New function. + (find_expr_in_tree): New function. + (insert_bb_before): New function. + (tree_dump_bb): Display the contents of BB_PREV_CHAIN_P. + * tree-dfa.c (tree_find_varrefs): Use accessor macros for array + 'referenced_symbols'. + (find_refs_in_stmt): Do not process error_mark_node trees. + Handle statement-expression nodes as any other statement tree. + Do not call find_refs_in_stmt_expr. + (find_refs_in_stmt_expr): Remove. + (add_ref_to_sym): Remove. + (add_ref_to_bb): Remove. + (find_refs_in_expr): Do not process error_mark_node trees. + ADDR_EXPR trees are not variable references except if used in a + CALL_EXPR node. + Handle EXPR_WITH_FILE_LOCATION nodes. + (create_varref): Remove variable 'is_new'. + Initialize data-flow arrays VARDEF_IMM_USES, VARDEF_RUSES, + VARDEF_PHI_CHAIN and VARUSE_RDEFS. + Do not call add_ref_to_sym and add_ref_to_bb. + (add_ref_symbol): Use accessor macros for varray + 'referenced_symbols'. + (function_may_recurse_p): New function. + (get_fcalls): New function. + (find_declaration): New function. + (dump_varref): Handle NULL values of VARREF_EXPR. + Use VARDEF_PHI_CHAIN instead of VARPHI_CHAIN. + (dump_varref_list): Check if the list is NULL before traversing it. + * tree-flow.h (struct vardef): Add fields 'ruses', 'marked' and + 'phi_chain'. + (VARDEF_RUSES): Define. + (VARDEF_MARKED): Define. + (VARDEF_PHI_CHAIN): Define. + (VARPHI_CHAIN): Remove. + (struct varphi): Remove. + (struct varuse): Add field 'rdefs'. + (VARUSE_RDEFS): Define. + (union varref_def): Remove field 'phi'. + (IS_GHOST_DEF): Define. + (IS_ARTIFICIAL_REF): Define. + (struct bb_ann_def): Add fields 'prev_chain_p' and 'binding_scope'. + (BB_PREV_CHAIN_P): Define. + (BB_BINDING_SCOPE): Define. + (FOR_INIT_STMT_BB): Define. + (FOR_COND_BB): Define. + (FOR_EXPR_BB): Define. + (WHILE_COND_BB): Define. + (DO_COND_BB): Define. + (IF_COND_BB): Define. + (CASE_COND_BB): Define. + (NREF_SYMBOLS): Define. + (REF_SYMBOL): Define. + (ADD_REF_SYMBOL): Define. + (FCALL_NON_PURE): Define. + (FCALL_PURE): Define. + (FCALL_BUILT_IN): Define. + (loop_body): Declare. + (set_loop_body): Declare. + (last_exec_stmt): Declare. + (is_statement_expression): Declare. + (first_non_decl_stmt): Declare. + (first_decl_stmt): Declare. + (first_non_label_in_bb): Declare. + (insert_stmt_tree_before): Declare. + (insert_stmt_tree_after): Declare. + (replace_expr_in_tree): Declare. + (find_expr_in_tree): Declare. + (insert_bb_before): Declare. + (function_may_recurse_p): Declare. + (get_fcalls): Declare. + (find_declaration): Declare. + (tree_compute_rdefs): Declare. + (analyze_rdefs): Declare. + (is_upward_exposed): Declare. + * tree-optimize.c (optimize_tree): Update name for varray + referenced_symbols. + Free varray referenced_symbols and call delete_ssa on exit. + * tree-ssa.c: Include flags.h, diagnostic.h and toplev.h. + (tree_build_ssa): Create ghost definitions before building FUD + chains. + (insert_phi_terms): Use accessor macros for 'referenced_symbols'. + Ignore ghost definitions when placing PHI terms. + (build_fud_chains): Call get_tree_ann to create an annotation for + the symbol if it doesn't already have one. + (search_fud_chains): Reformat comments. + Do not initialize varray VARDEF_IMM_USES. + If a successor basic block does not have references, continue on to + the next one, do not stop. + Do not initialize varray VARDEF_PHI_CHAIN. + (delete_ssa): New function. + (delete_refs): New function. + (tree_compute_rdefs): New function. + (analyze_rdefs): New function. + (follow_chain): New function. + (is_upward_exposed): New function. + +2001-09-14 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (tree_find_basic_blocks): Remove call to + mark_critical_edges. + (create_maximal_bb): Do not create annotations for non-executable + statements. + (map_stmt_to_bb): Rename basic_block_ann with bb_ann. + (delete_cfg): Ditto. + (is_exec_stmt): Reformat. + (create_bb_ann): New function. + * tree-dfa.c (create_node): Remove. + (ref_symbols_list): Remove. + (create_tree_ann): Declare. + (referenced_symbols): Declare. + (tree_find_varrefs): Replace usage of linked lists with variable + arrays. + (create_varref): Remove second argument from call to + add_ref_symbol. + Update comments. + (add_ref_to_sym): Replace usage of linked lists with variable + arrays. + Declare static. + (add_ref_to_bb): Ditto. + (add_ref_symbol): Ditto. + (dump_varref_list): Ditto. + (debug_varref_list): Ditto. + (create_varref_list): Remove. + (push_ref): Remove. + (create_node): Remove. + (delete_varref_list): Remove. + (get_tree_ann): Call create_tree_ann if the tree doesn't have an + annotation already. + (create_tree_ann): New function. + * tree-flow.h (varref_list_def): Remove. + (vardef): Change type of field 'imm_uses' to 'varray_type'. + (varphi): Change type of field 'phi_chain' to 'varray_type'. + (varref_node_def): Remove. + (varref_node): Remove. + (VARREF_NODE_ELEM): Remove. + (VARREF_NODE_NEXT): Remove. + (VARREF_NODE_PREV): Remove. + (varref_list_def): Remove. + (varref_list): Remove. + (VARREF_LIST_FIRST): Remove. + (VARREF_LIST_LAST): Remove. + (tree_ann_def): Change type of field 'refs' to 'varray_type'. + (basic_block_ann_def): Rename to 'bb_ann_def'. + Change type of field 'refs' to 'varray_type'. + (basic_block_ann): Rename to 'bb_ann'. + (ref_symbols_list): Remove. + (referenced_symbols): Declare. + (add_ref_to_sym): Remove. + (add_ref_to_bb): Remove. + (add_ref_symbol): Remove. + (remove_ann_from_sym): Remove. + (create_varref_list): Remove. + (push_ref): Remove. + (delete_varref_list): Remove. + (debug_varref_list): Update argument type to be 'varray_type'. + (dump_varref_list): Ditto. + * tree-optimize.c: Include 'basic-block.h'. + (optimize_tree): Replace references to 'ref_symbols_list' with + 'referenced_symbols'. + Remove call to delete_varref_list. + * tree-ssa.c (insert_phi_terms): Rename 'work_list' to + 'work_stack'. + Use VARRAY_PUSH and VARRAY_TOP to access 'work_stack' instead of + maintaining the stack pointer in 'work_list_top'. + Remove code to grow 'work_stack'. + Remove references to 'work_list_top'. + Replace references to 'ref_symbols_list' with 'referenced_symbols'. + (build_fud_chains): Replace references to 'ref_symbols_list' with + 'referenced_symbols'. + (search_fud_chains): If there are no variable references in the + basic block, return early. + Change usage of linked lists with variable arrays. + +2001-09-07 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (tree_find_basic_blocks): Document how to traverse + trees inside a basic block. + (make_for_stmt_blocks): Make sure that there is always a block for + FOR_EXPR, even if the loop does not have an expression. + Create a separate block for FOR_INIT_STMT. + (make_while_stmt_blocks): Always create an "end_while" block. + (make_if_stmt_blocks): Do not store IF_COND in the header block of + an IF statement. + (make_for_stmt_edges): Create an edge from the block header to the + block for FOR_INIT_STMT. + Determine the first block of the loop body calling BB_FOR_STMT on + the first executable statement in the body. + Remove the special case for missing FOR_EXPR trees. + (make_while_stmt_edges): Create a back edge from the end_while + block to the header block. + Determine the first block of the loop body calling BB_FOR_STMT on + the first executable statement in the body. + (make_do_stmt_edges): Determine the first block of the loop body + calling BB_FOR_STMT on the first executable statement in the body. + (condition_block): Rename to latch_block. Return the latch + block for the given loop header. + (make_continue_stmt_edges): Rename condition_block to + latch_block. + (successor_block): Ditto. + * tree-flow.h (condition_block): Rename to latch_block. + +2001-09-06 Diego Novillo <dnovillo@redhat.com> + + * tree-dfa.c (tree_find_varrefs): Use TDF_REFS instead of TDF_VARREF. + * tree-flow.h (TDF_VARREF): Remove. + +2001-09-04 Nathan Sidwell <nathan@codesourcery.com> + + * c-common.h (tree_dump_index): Add more comments. + (TDF_REFS): New dump flag. + * c-dump.c (dump_files): Name flags `tree' rather than `ast'. + (dump_option_value_info): New struct. + (dump_options): New array. + (dump_switch_p): Parse switch options symbolically. + * doc/invoke.texi (-fdump-ast): Rename to ... + (-fdump-tree): ... here. Document options are symbolic, and + not all are applicable. Combine ssa related flags into the other + tree dump flags. + +2001-08-27 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (tree-ssa.o): Update dependencies. + (tree-cfg.o): Ditto. + (tree-dfa.o): Ditto. + (tree-optimize.o): Ditto. + +2001-08-26 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (C_AND_OBJC_OBJS): Replace tree-opt.o with + tree-optimize.o. + (c-decl.o): Ditto. + (tree-ssa.o): Ditto. + (tree-cfg.o): Ditto. + (tree-dfa.o): Ditto. + (tree-opt.o): Ditto. + * c-decl.c: Replace tree-opt.h with tree-optimize.h. + (c_expand_body): Remove call to init_tree_opt. + * flow.c (flow_loop_dump): Do not display insn UIDs if this is not + an RTL basic block. + * tree-cfg.c: Replace tree-opt.h with tree-optimize.h. + (block_invalidates_loop): New local function. + (validate_loops): New function. + (tree_dump_bb): Display the loop depth of the block. + * tree-dfa.c: Replace tree-opt.h with tree-optimize.h. + * tree-flow.h (validate_loops): Declare. + * tree-opt.c: Rename to tree-optimize.c. + * tree-opt.h: Rename to tree-optimize.h. + * tree-optimize.c: Rename from tree-opt.c. + * tree-optimize.h: Rename from tree-opt.h. + * tree-ssa.c: Replace tree-opt.h with tree-optimize.h. + (tree_build_ssa): Call tree_dump_bb instead of tree_debug_bb. + * cp/Make-lang.in: Replace tree-opt.h with tree-optimize.h. + +2001-08-20 Diego Novillo <dnovillo@redhat.com> + + * basic-block.h (basic_block): Remove field 'reachable'. + Add new field 'flags'. + (BB_REACHABLE): Define. + * c-common.h (tree_dump_index): Add TDI_cfg, TDI_dot, TDI_ssa. + * c-decl.c (c_decode_option): Skip '-f' prefix before calling + dump_switch_p. + * c-dump.c (dump_file_info): Add entries for -fdump-tree-cfg, + -fdump-tree-graphviz and -fdump-tree-ssa. + * flow.c (find_unreachable_blocks): Use BB_REACHABLE bit in bb->flags + instead of bb->reachable. + (delete_unreachable_blocks): Ditto. + * tree-cfg.c: Minor formatting changes throughout the file. + (DEBUG_TREE_FLOW): Remove. + (debug_tree_flow): Remove. + (cfg_dump_file): New local variable. + (dot_dump_file): New local variable. + (cfg_dump_flags): New local variable. + (dot_dump_flags): New local variable. + (tree_find_basic_blocks): Remove unused arguments. + Add code to react to -fdump-tree-cfg and -fdump-tree-graphviz. + Remove uses of DEBUG_TREE_FLOW. + (delete_unreachable_blocks): Use BB_REACHABLE bit in bb->flags + instead of bb->reachable. + (tree_dump_cfg): New. + (tree_debug_cfg): Call tree_dump_cfg(). + (tree_cfg2dot): Accept a FILE pointer instead of a file name as + argument. + Name the graph with the current function name. + * tree-dfa.c: Minor formatting changes throughout the file. + (DEBUG_TREE_DFA): Remove. + (debug_tree_dfa): Remove. + (dump_file): New local variable. + (dump_flags): New local variable. + (tree_find_varrefs): Add code to react to -fdump-tree-ssa. + Remove uses of DEBUG_TREE_DFA. + (find_refs_in_expr): Remove uses of DEBUG_TREE_DFA. + (create_varref): Replace VARREF_BLOCK with VARREF_BB. + * tree-flow.h: Minor formatting changes throughout the file. + (VARREF_BLOCK): Rename to VARREF_BB. + (VARREF_NEXT): Remove. + (VARREF_PREV): Remove. + (TDF_VARREF): Define. + (tree_find_basic_blocks): Remove unused arguments. + (tree_dump_cfg): Declare. + (tree_cfg2dot): Change argument to FILE *. + * tree-opt.c: Minor formatting changes throughout the file. + (optimize_tree): Remove unused arguments in call to + tree_find_basic_blocks(). + * tree-opt.h: Ditto. + * tree-ssa.c: Minor formatting changes throughout the file. + (DEBUG_TREE_SSA): Remove. + (debug_tree_ssa): Remove. + (dump_file): New local variable. + (dump_flags): New local variable. + (tree_build_ssa): Add code to react to -fdump-tree-ssa. + Remove uses of DEBUG_TREE_SSA. + (insert_phi_terms): Remove uses of DEBUG_TREE_SSA. + * doc/invoke.texi: Add documentation for -fdump-tree-cfg, + -fdump-tree-graphviz and -fdump-tree-ssa. + Replace existing references to -fdump-tree with -fdump-ast. + +2001-08-10 Diego Novillo <dnovillo@redhat.com> + + * basic-block.h (basic_block): Add new field 'reachable'. + (expunge_block): Declare. + * flow.c (ENTRY_BLOCK_PTR): Initialize field 'reachable'. + (EXIT_BLOCK_PTR): Ditto. + (expunge_block): Remove static declaration. + (cleanup_cfg): Clear bb->aux on every basic block. + (find_unreachable_blocks): Use field 'reachable' when computing + reachability. + (delete_unreachable_blocks): Use field 'reachable'. + + * tree-cfg.c: Rename all instance of 'node' with 'block. + (get_successor_block): Rename to successor_block. + (make_compound_stmt_edges): Remove. + (make_switch_stmt_edges): Remove. + (delete_unreachable_blocks): New. + (delete_block): New. + (make_blocks): Add new argument 'compound_stmt'. Do not include + COMPOUND_STMT trees in the flowgraph. + (make_for_stmt_blocks): Include FOR_INIT_STMT in the entry block of + the loop. + If FOR_COND does not exist, create a tree holding the constant 1. + Add new argument 'compound_stmt'. + (make_while_stmt_blocks): Include WHILE_COND in the entry block of + the loop. + Add new argument 'compound_stmt'. + (make_do_stmt_blocks): Add new argument 'compound_stmt'. + (make_if_stmt_blocks): Add new argument 'compound_stmt'. + Include IF_COND in the IF header block. + (make_switch_stmt_blocks): Add new argument 'compound_stmt'. + Include SWITCH_COND in the SWITCH header block. + (create_maximal_bb): Remove argument 'is_loop_header'. + Add new argument 'compound_stmt'. + Update all callers. + Return the newly created basic block instead of its last statement. + Update comments. + Do not store control flow altering statements in bb->exit_stmt. + Only add executable statements to the block. + Annotate with 'compound_stmt' each tree added to the block. + (create_bb): Do not update annotation 'is_loop_header'. + (make_edges): Remove naive reachability analysis. + When a label node is found, add an edge from the immediately + enclosing switch statement. + Call delete_unreachable_blocks() after adding all the edges. + (make_ctrl_stmt_edges): Do not consider COMPOUND_STMT trees. + Do nothing for SWITCH_STMT trees. + (make_exit_edges): Use bb->end_tree instead of BB_EXIT_STMT. + (make_for_stmt_edges): Remove code that added edges for the block + holding FOR_INIT_STMT. + Update comments. + Do not consider the case where FOR_COND is NULL. + Call first_exec_stmt() to determine if FOR_BODY is empty. + Only create an edge from expr_bb to cond_bb if FOR_EXPR is + non-null. + (make_while_stmt_edges): Remove code that added edges for the block + holding WHILE_COND. + Update comments. + Call first_exec_stmt() to determine if WHILE_BODY is empty. + (make_do_stmt_edges): Call first_exec_stmt() to determine if + DO_BODY is empty. + (make_if_stmt_edges): Remove code that added edges for the block + holding IF_COND. + Call first_exec_stmt() to determine if THEN_CLAUSE or ELSE_CLAUSE + are empty. + (make_switch_stmt_edges): Remove. + (make_goto_stmt_edges): Use bb->end_tree instead of BB_EXIT_STMT. + (make_break_stmt_edges): Use bb->end_tree instead of BB_EXIT_STMT. + Call switch_parent() and loop_parent() to determine if the + statement is inside an appropriate control structure. + (make_continue_stmt_edges): Use bb->end_tree instead of + BB_EXIT_STMT. + (make_return_stmt_edges): Ditto. + (get_successor_block): Rename to successor_block. + Call first_exec_stmt() to find the first executable statement in + TREE_CHAIN. + (is_ctrl_stmt): Do not consider COMPOUND_STMT trees. + (stmt_starts_bb_p): Ditto. + (stmt_ends_bb_p): Reformat comments. + (delete_cfg): Reformat comments. + (find_loop_parent): Rename to loop_parent. + (get_condition_block): Rename to condition_block. + Update to use new index numbers for control structure header + blocks. + (switch_parent): New. + (first_exec_stmt): New. + (is_exec_stmt): New. + (tree_cfg2dot): Reformat comments. + * tree-dfa.c (find_refs): Remove. + (find_refs_in_stmt): New + (find_refs_in_stmt_expr): New. + (tree_find_varrefs): Look for variables doing a CFG traversal + instead of the trees. Remove both arguments. + (find_refs_in_expr): Add new argument 'bb'. + Update all recursive calls. + (create_varref): Abort if the basic block 'bb' is NULL. + (add_ref_to_sym): Reformat comments. + (add_ref_symbol): Ditto. + (delete_varref_list): Ditto. + * tree-flow.h (struct tree_ann_def): Add 'compound_stmt'. + (TREE_COMPOUND_STMT): New macro. + (struct basic_block_ann_def): Remove 'exit_stmt' and + 'is_loop_header'. + (BB_EXIT_STMT): Remove. + (BB_IS_LOOP_HEADER): Remove. + * tree-opt.c (optimize_tree): Call tree_find_varrefs() with no + arguments. + Only build DFA and SSA information if n_basic_blocks is greater + than zero. + * tree-ssa.c: Rename all instances of 'node' with 'block'. + (tree_build_ssa): Reformat comments. + (insert_phi_terms): Ditto. + +2001-08-01 Diego Novillo <dnovillo@redhat.com> + + * tree-cfg.c (USE_TREE_IL): Remove. + (make_back_edges): Remove. + (make_fallthru_edge): Remove. + (get_outermost_scope_block): Remove. + (is_last_block_of_loop): Remove. + (tree_find_basic_blocks): Do not return early if 'errorcount' is set. + (make_edges): Do not treat back edges as a separate case. + Do not call make_fallthru_edge to create fall-through edges. + Do not emit a warning for unreachable blocks containing a single + closing brace. + (make_do_stmt_edges): Update comment. + (make_goto_stmt_edges): Do not call get_outermost_scope_block(). + (make_break_stmt_edges): Do not call get_outermost_scope_block(). + Do not call make_back_edges(). + (make_continue_stmt_edges): Call find_loop_parent(). Emit an error + if the 'continue' statement is not inside a loop. Call + get_condition_block() to find the target node. + (make_return_stmt_edges): Do not call get_outermost_scope_block(). + (get_successor_block): Return EXIT_BLOCK_PTR if 'bb' is the last + block in the graph. + Return the condition node of the loop if 'bb' doesn't have a + natural successor and its parent is a loop header. + (tree_cfg2dot): Output fake edges with dotted lines. + * tree-dfa.c (USE_TREE_IL): Remove. + * tree-opt.c (USE_TREE_IL): Remove. + * tree-ssa.c (USE_TREE_IL): Remove. + * tree-flow.h (is_last_block_of_loop): Remove. + +2001-07-23 Diego Novillo <dnovillo@redhat.com> + + * Makefile.in (C_AND_OBJC_OBJS): Add tree-cfg.o, tree-dfa.o, + tree-ssa.o and tree-opt.o. + (c-decl.o): Add dependency on tree-opt.h + (tree-ssa.o): New rule. + (tree-cfg.o): New rule. + (tree-dfa.o): New rule. + (tree-opt.o): New rule. + * c-decl.c: Include tree-opt.h. + (c_expand_body): Call optimize_tree() when the -ftree-ssa flag is + given. + * flags.h (flag_tree_ssa): Declare. + * toplev.c (flag_tree_ssa): Define. + (lang_independent_options): Add -ftree-ssa. + * tree-cfg.c: New file. + * tree-dfa.c: New file. + * tree-flow.h: New file. + * tree-opt.c: New file. + * tree-opt.h: New file. + * tree-ssa.c: New file. + * cp/Make-lang.in (CXX_C_OBJS): Add tree-cfg.o, tree-dfa.o, + tree-opt.o and tree-ssa.o. + * doc/invoke.texi: Add documentation for -ftree-ssa. + +2001-07-23 Nathan Sidwell <nathan@codesourcery.com> + + * Makefile.in (calls.o): Depend on intl.h. + * calls.c: Include intl.h. + (ECF_NEED_STACK_FRAME, ECF_NEED_ARG_FRAME): New flags. + (special_function_p): Detect when we need a stack or arg + frame. Don't optimize on length. + (setjmp_call_p): Remove. + (uninlinable_call_p): New function. + * tree.h (setjmp_call_p): Remove. + (uninlinable_call_p): Declare. + +2001-07-22 Nathan Sidwell <nathan@codesourcery.com> + + * params.def (PARAM_MAX_INLINE_AST): New parameter. + (PARAM_ARG_INLINE_AST): New parameter. + * doc/invoke.texi (max-inline-ast, arg-inline-ast): Document + parameters. + +Local Variables: +mode: change-log +change-log-default-name: "ChangeLog.tree-ssa" +End: + + +Copyright (C) 2001, 2002, 2003, 2004 Free Software Foundation, Inc. + +Copying and distribution of this file, with or without modification, +are permitted in any medium without royalty provided the copyright +notice and this notice are preserved. |