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
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1 files changed, 954 insertions, 0 deletions

diff --git a/gcc/ada/gcc-interface/gigi.h b/gcc/ada/gcc-interface/gigi.h
new file mode 100644
index 000000000..eca4d9e7e
--- /dev/null
+++ b/gcc/ada/gcc-interface/gigi.h
@@ -0,0 +1,954 @@
+/****************************************************************************
+ *                                                                          *
+ *                         GNAT COMPILER COMPONENTS                         *
+ *                                                                          *
+ *                                 G I G I                                  *
+ *                                                                          *
+ *                              C Header File                               *
+ *                                                                          *
+ *          Copyright (C) 1992-2011, Free Software Foundation, Inc.         *
+ *                                                                          *
+ * GNAT is free software;  you can  redistribute it  and/or modify it under *
+ * terms of the  GNU General Public License as published  by the Free Soft- *
+ * ware  Foundation;  either version 3,  or (at your option) any later ver- *
+ * sion.  GNAT is distributed in the hope that it will be useful, but WITH- *
+ * OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY *
+ * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License *
+ * for  more details.  You should have  received  a copy of the GNU General *
+ * Public License  distributed  with GNAT;  see file  COPYING3.  If not see *
+ * <http://www.gnu.org/licenses/>.                                          *
+ *                                                                          *
+ * GNAT was originally developed  by the GNAT team at  New York University. *
+ * Extensive contributions were provided by Ada Core Technologies Inc.      *
+ *                                                                          *
+ ****************************************************************************/
+
+/* Declare all functions and types used by gigi.  */
+
+/* Given GNAT_ENTITY, a GNAT defining identifier node, which denotes some Ada
+   entity, this routine returns the equivalent GCC tree for that entity
+   (an ..._DECL node) and associates the ..._DECL node with the input GNAT
+   defining identifier.
+
+   If GNAT_ENTITY is a variable or a constant declaration, GNU_EXPR gives its
+   initial value (in GCC tree form). This is optional for variables.
+   For renamed entities, GNU_EXPR gives the object being renamed.
+
+   DEFINITION is nonzero if this call is intended for a definition.  This is
+   used for separate compilation where it necessary to know whether an
+   external declaration or a definition should be created if the GCC equivalent
+   was not created previously.  The value of 1 is normally used for a nonzero
+   DEFINITION, but a value of 2 is used in special circumstances, defined in
+   the code.  */
+extern tree gnat_to_gnu_entity (Entity_Id gnat_entity, tree gnu_expr,
+                                int definition);
+
+/* Similar, but if the returned value is a COMPONENT_REF, return the
+   FIELD_DECL.  */
+extern tree gnat_to_gnu_field_decl (Entity_Id gnat_entity);
+
+/* Similar, but GNAT_ENTITY is assumed to refer to a GNAT type.  Return
+   the GCC type corresponding to that entity.  */
+extern tree gnat_to_gnu_type (Entity_Id gnat_entity);
+
+/* Wrap up compilation of T, a TYPE_DECL, possibly deferring it.  */
+extern void rest_of_type_decl_compilation (tree t);
+
+/* Start a new statement group chained to the previous group.  */
+extern void start_stmt_group (void);
+
+/* Add GNU_STMT to the current statement group.  If it is an expression with
+   no effects, it is ignored.  */
+extern void add_stmt (tree gnu_stmt);
+
+/* Similar, but the statement is always added, regardless of side-effects.  */
+extern void add_stmt_force (tree gnu_stmt);
+
+/* Like add_stmt, but set the location of GNU_STMT to that of GNAT_NODE.  */
+extern void add_stmt_with_node (tree gnu_stmt, Node_Id gnat_node);
+
+/* Similar, but the statement is always added, regardless of side-effects.  */
+extern void add_stmt_with_node_force (tree gnu_stmt, Node_Id gnat_node);
+
+/* Return code corresponding to the current code group.  It is normally
+   a STATEMENT_LIST, but may also be a BIND_EXPR or TRY_FINALLY_EXPR if
+   BLOCK or cleanups were set.  */
+extern tree end_stmt_group (void);
+
+/* Set the BLOCK node corresponding to the current code group to GNU_BLOCK.  */
+extern void set_block_for_group (tree);
+
+/* Add a declaration statement for GNU_DECL to the current BLOCK_STMT node.
+   Get SLOC from GNAT_ENTITY.  */
+extern void add_decl_expr (tree gnu_decl, Entity_Id gnat_entity);
+
+/* Mark nodes rooted at T with TREE_VISITED and types as having their
+   sized gimplified.  We use this to indicate all variable sizes and
+   positions in global types may not be shared by any subprogram.  */
+extern void mark_visited (tree t);
+
+/* This macro calls the above function but short-circuits the common
+   case of a constant to save time and also checks for NULL.  */
+
+#define MARK_VISITED(EXP)		\
+do {					\
+  if((EXP) && !CONSTANT_CLASS_P (EXP))	\
+    mark_visited (EXP);			\
+} while (0)
+
+/* Finalize any From_With_Type incomplete types.  We do this after processing
+   our compilation unit and after processing its spec, if this is a body.  */
+extern void finalize_from_with_types (void);
+
+/* Return the equivalent type to be used for GNAT_ENTITY, if it's a
+   kind of type (such E_Task_Type) that has a different type which Gigi
+   uses for its representation.  If the type does not have a special type
+   for its representation, return GNAT_ENTITY.  If a type is supposed to
+   exist, but does not, abort unless annotating types, in which case
+   return Empty.   If GNAT_ENTITY is Empty, return Empty.  */
+extern Entity_Id Gigi_Equivalent_Type (Entity_Id gnat_entity);
+
+/* Given GNAT_ENTITY, elaborate all expressions that are required to
+   be elaborated at the point of its definition, but do nothing else.  */
+extern void elaborate_entity (Entity_Id gnat_entity);
+
+/* Mark GNAT_ENTITY as going out of scope at this point.  Recursively mark
+   any entities on its entity chain similarly.  */
+extern void mark_out_of_scope (Entity_Id gnat_entity);
+
+/* Get the unpadded version of a GNAT type.  */
+extern tree get_unpadded_type (Entity_Id gnat_entity);
+
+/* Create a record type that contains a SIZE bytes long field of TYPE with a
+    starting bit position so that it is aligned to ALIGN bits, and leaving at
+    least ROOM bytes free before the field.  BASE_ALIGN is the alignment the
+    record is guaranteed to get.  */
+extern tree make_aligning_type (tree type, unsigned int align, tree size,
+				unsigned int base_align, int room);
+
+/* Ensure that TYPE has SIZE and ALIGN.  Make and return a new padded type
+   if needed.  We have already verified that SIZE and TYPE are large enough.
+   GNAT_ENTITY is used to name the resulting record and to issue a warning.
+   IS_COMPONENT_TYPE is true if this is being done for the component type
+   of an array.  IS_USER_TYPE is true if we must complete the original type.
+   DEFINITION is true if this type is being defined.  SAME_RM_SIZE is true
+   if the RM size of the resulting type is to be set to SIZE too; otherwise,
+   it's set to the RM size of the original type.  */
+extern tree maybe_pad_type (tree type, tree size, unsigned int align,
+			    Entity_Id gnat_entity, bool is_component_type,
+			    bool is_user_type, bool definition,
+			    bool same_rm_size);
+
+/* Given a GNU tree and a GNAT list of choices, generate an expression to test
+   the value passed against the list of choices.  */
+extern tree choices_to_gnu (tree operand, Node_Id choices);
+
+/* Given GNAT_ENTITY, an object (constant, variable, parameter, exception)
+   and GNU_TYPE, its corresponding GCC type, set Esize and Alignment to the
+   size and alignment used by Gigi.  Prefer SIZE over TYPE_SIZE if non-null.
+   BY_REF is true if the object is used by reference and BY_DOUBLE_REF is
+   true if the object is used by double reference.  */
+extern void annotate_object (Entity_Id gnat_entity, tree gnu_type, tree size,
+			     bool by_ref, bool by_double_ref);
+
+/* Return the variant part of RECORD_TYPE, if any.  Otherwise return NULL.  */
+extern tree get_variant_part (tree record_type);
+
+/* Given a type T, a FIELD_DECL F, and a replacement value R, return a new
+   type with all size expressions that contain F updated by replacing F
+   with R.  If F is NULL_TREE, always make a new RECORD_TYPE, even if
+   nothing has changed.  */
+extern tree substitute_in_type (tree t, tree f, tree r);
+
+/* Return the RM size of GNU_TYPE.  This is the actual number of bits
+   needed to represent the object.  */
+extern tree rm_size (tree gnu_type);
+
+/* Return the name to be used for GNAT_ENTITY.  If a type, create a
+   fully-qualified name, possibly with type information encoding.
+   Otherwise, return the name.  */
+extern tree get_entity_name (Entity_Id gnat_entity);
+
+/* Return an identifier representing the external name to be used for
+   GNAT_ENTITY.  If SUFFIX is specified, the name is followed by "___"
+   and the specified suffix.  */
+extern tree create_concat_name (Entity_Id gnat_entity, const char *suffix);
+
+/* Given GNU_NAME, an IDENTIFIER_NODE containing a name and SUFFIX, a
+   string, return a new IDENTIFIER_NODE that is the concatenation of
+   the name followed by "___" and the specified suffix.  */
+extern tree concat_name (tree gnu_name, const char *suffix);
+
+/* Highest number in the front-end node table.  */
+extern int max_gnat_nodes;
+
+/* Current node being treated, in case abort called.  */
+extern Node_Id error_gnat_node;
+
+/* True when gigi is being called on an analyzed but unexpanded
+   tree, and the only purpose of the call is to properly annotate
+   types with representation information.  */
+extern bool type_annotate_only;
+
+/* Current file name without path.  */
+extern const char *ref_filename;
+
+/* This structure must be kept synchronized with Call_Back_End.  */
+struct File_Info_Type
+{
+  File_Name_Type File_Name;
+  Nat Num_Source_Lines;
+};
+
+/* This is the main program of the back-end.  It sets up all the table
+   structures and then generates code.  */
+extern void gigi (Node_Id gnat_root, int max_gnat_node,
+                  int number_name ATTRIBUTE_UNUSED,
+                  struct Node *nodes_ptr, Node_Id *next_node_ptr,
+                  Node_Id *prev_node_ptr, struct Elist_Header *elists_ptr,
+                  struct Elmt_Item *elmts_ptr,
+                  struct String_Entry *strings_ptr,
+                  Char_Code *strings_chars_ptr,
+                  struct List_Header *list_headers_ptr,
+                  Nat number_file,
+                  struct File_Info_Type *file_info_ptr,
+                  Entity_Id standard_boolean,
+                  Entity_Id standard_integer,
+                  Entity_Id standard_character,
+                  Entity_Id standard_long_long_float,
+                  Entity_Id standard_exception_type,
+                  Int gigi_operating_mode);
+
+/* GNAT_NODE is the root of some GNAT tree.  Return the root of the
+   GCC tree corresponding to that GNAT tree.  Normally, no code is generated;
+   we just return an equivalent tree which is used elsewhere to generate
+   code.  */
+extern tree gnat_to_gnu (Node_Id gnat_node);
+
+/* GNU_STMT is a statement.  We generate code for that statement.  */
+extern void gnat_expand_stmt (tree gnu_stmt);
+
+/* Generate GIMPLE in place for the expression at *EXPR_P.  */
+extern int gnat_gimplify_expr (tree *expr_p, gimple_seq *pre_p,
+                               gimple_seq *post_p ATTRIBUTE_UNUSED);
+
+/* Do the processing for the declaration of a GNAT_ENTITY, a type.  If
+   a separate Freeze node exists, delay the bulk of the processing.  Otherwise
+   make a GCC type for GNAT_ENTITY and set up the correspondence.  */
+extern void process_type (Entity_Id gnat_entity);
+
+/* Convert SLOC into LOCUS.  Return true if SLOC corresponds to a source code
+   location and false if it doesn't.  In the former case, set the Gigi global
+   variable REF_FILENAME to the simple debug file name as given by sinput.  */
+extern bool Sloc_to_locus (Source_Ptr Sloc, location_t *locus);
+
+/* Post an error message.  MSG is the error message, properly annotated.
+   NODE is the node at which to post the error and the node to use for the
+   '&' substitution.  */
+extern void post_error (const char *msg, Node_Id node);
+
+/* Similar to post_error, but NODE is the node at which to post the error and
+   ENT is the node to use for the '&' substitution.  */
+extern void post_error_ne (const char *msg, Node_Id node, Entity_Id ent);
+
+/* Similar to post_error_ne, but NUM is the number to use for the '^'.  */
+extern void post_error_ne_num (const char *msg, Node_Id node, Entity_Id ent,
+                               int num);
+
+/* Similar to post_error_ne, but T is a GCC tree representing the number to
+   write.  If T represents a constant, the text inside curly brackets in
+   MSG will be output (presumably including a '^').  Otherwise it will not
+   be output and the text inside square brackets will be output instead.  */
+extern void post_error_ne_tree (const char *msg, Node_Id node, Entity_Id ent,
+                                tree t);
+
+/* Similar to post_error_ne_tree, but NUM is a second integer to write.  */
+extern void post_error_ne_tree_2 (const char *msg, Node_Id node, Entity_Id ent,
+                                  tree t, int num);
+
+/* Return a label to branch to for the exception type in KIND or NULL_TREE
+   if none.  */
+extern tree get_exception_label (char kind);
+
+/* Return the decl for the current elaboration procedure.  */
+extern tree get_elaboration_procedure (void);
+
+/* If nonzero, pretend we are allocating at global level.  */
+extern int force_global;
+
+/* The default alignment of "double" floating-point types, i.e. floating
+   point types whose size is equal to 64 bits, or 0 if this alignment is
+   not specifically capped.  */
+extern int double_float_alignment;
+
+/* The default alignment of "double" or larger scalar types, i.e. scalar
+   types whose size is greater or equal to 64 bits, or 0 if this alignment
+   is not specifically capped.  */
+extern int double_scalar_alignment;
+
+/* Data structures used to represent attributes.  */
+
+enum attr_type
+{
+  ATTR_MACHINE_ATTRIBUTE,
+  ATTR_LINK_ALIAS,
+  ATTR_LINK_SECTION,
+  ATTR_LINK_CONSTRUCTOR,
+  ATTR_LINK_DESTRUCTOR,
+  ATTR_THREAD_LOCAL_STORAGE,
+  ATTR_WEAK_EXTERNAL
+};
+
+struct attrib
+{
+  struct attrib *next;
+  enum attr_type type;
+  tree name;
+  tree args;
+  Node_Id error_point;
+};
+
+/* Table of machine-independent internal attributes.  */
+extern const struct attribute_spec gnat_internal_attribute_table[];
+
+/* Define the entries in the standard data array.  */
+enum standard_datatypes
+{
+  /* The longest floating-point type.  */
+  ADT_longest_float_type,
+
+  /* The type of an exception.  */
+  ADT_except_type,
+
+  /* Type declaration node  <==> typedef void *T */
+  ADT_ptr_void_type,
+
+  /* Function type declaration -- void T() */
+  ADT_void_ftype,
+
+  /* Type declaration node  <==> typedef void *T() */
+  ADT_ptr_void_ftype,
+
+  /* Type declaration node  <==> typedef virtual void *T() */
+  ADT_fdesc_type,
+
+  /* Null pointer for above type.  */
+  ADT_null_fdesc,
+
+  /* Value 1 in signed bitsizetype.  */
+  ADT_sbitsize_one_node,
+
+  /* Value BITS_PER_UNIT in signed bitsizetype.  */
+  ADT_sbitsize_unit_node,
+
+  /* Function declaration nodes for run-time functions for allocating memory.
+     Ada allocators cause calls to these functions to be generated.  Malloc32
+     is used only on 64bit systems needing to allocate 32bit memory.  */
+  ADT_malloc_decl,
+  ADT_malloc32_decl,
+
+  /* Likewise for freeing memory.  */
+  ADT_free_decl,
+
+  /* Function decl node for 64-bit multiplication with overflow checking.  */
+  ADT_mulv64_decl,
+
+  /* Identifier for the name of the _Parent field in tagged record types.  */
+  ADT_parent_name_id,
+
+  /* Identifier for the name of the Exception_Data type.  */
+  ADT_exception_data_name_id,
+
+  /* Types and decls used by our temporary exception mechanism.  See
+     init_gigi_decls for details.  */
+  ADT_jmpbuf_type,
+  ADT_jmpbuf_ptr_type,
+  ADT_get_jmpbuf_decl,
+  ADT_set_jmpbuf_decl,
+  ADT_get_excptr_decl,
+  ADT_setjmp_decl,
+  ADT_longjmp_decl,
+  ADT_update_setjmp_buf_decl,
+  ADT_raise_nodefer_decl,
+  ADT_begin_handler_decl,
+  ADT_end_handler_decl,
+  ADT_others_decl,
+  ADT_all_others_decl,
+  ADT_LAST};
+
+/* Define kind of exception information associated with raise statements.  */
+enum exception_info_kind
+{
+  /* Simple exception information: file:line.  */
+  exception_simple,
+  /* Range exception information: file:line + index, first, last.  */
+  exception_range,
+  /* Column exception information: file:line:column.  */
+  exception_column
+};
+
+extern GTY(()) tree gnat_std_decls[(int) ADT_LAST];
+extern GTY(()) tree gnat_raise_decls[(int) LAST_REASON_CODE + 1];
+extern GTY(()) tree gnat_raise_decls_ext[(int) LAST_REASON_CODE + 1];
+
+#define longest_float_type_node gnat_std_decls[(int) ADT_longest_float_type]
+#define except_type_node gnat_std_decls[(int) ADT_except_type]
+#define ptr_void_type_node gnat_std_decls[(int) ADT_ptr_void_type]
+#define void_ftype gnat_std_decls[(int) ADT_void_ftype]
+#define ptr_void_ftype gnat_std_decls[(int) ADT_ptr_void_ftype]
+#define fdesc_type_node gnat_std_decls[(int) ADT_fdesc_type]
+#define null_fdesc_node gnat_std_decls[(int) ADT_null_fdesc]
+#define sbitsize_one_node gnat_std_decls[(int) ADT_sbitsize_one_node]
+#define sbitsize_unit_node gnat_std_decls[(int) ADT_sbitsize_unit_node]
+#define malloc_decl gnat_std_decls[(int) ADT_malloc_decl]
+#define malloc32_decl gnat_std_decls[(int) ADT_malloc32_decl]
+#define free_decl gnat_std_decls[(int) ADT_free_decl]
+#define mulv64_decl gnat_std_decls[(int) ADT_mulv64_decl]
+#define parent_name_id gnat_std_decls[(int) ADT_parent_name_id]
+#define exception_data_name_id gnat_std_decls[(int) ADT_exception_data_name_id]
+#define jmpbuf_type gnat_std_decls[(int) ADT_jmpbuf_type]
+#define jmpbuf_ptr_type gnat_std_decls[(int) ADT_jmpbuf_ptr_type]
+#define get_jmpbuf_decl gnat_std_decls[(int) ADT_get_jmpbuf_decl]
+#define set_jmpbuf_decl gnat_std_decls[(int) ADT_set_jmpbuf_decl]
+#define get_excptr_decl gnat_std_decls[(int) ADT_get_excptr_decl]
+#define setjmp_decl gnat_std_decls[(int) ADT_setjmp_decl]
+#define longjmp_decl gnat_std_decls[(int) ADT_longjmp_decl]
+#define update_setjmp_buf_decl gnat_std_decls[(int) ADT_update_setjmp_buf_decl]
+#define raise_nodefer_decl gnat_std_decls[(int) ADT_raise_nodefer_decl]
+#define begin_handler_decl gnat_std_decls[(int) ADT_begin_handler_decl]
+#define others_decl gnat_std_decls[(int) ADT_others_decl]
+#define all_others_decl gnat_std_decls[(int) ADT_all_others_decl]
+#define end_handler_decl gnat_std_decls[(int) ADT_end_handler_decl]
+
+/* Routines expected by the gcc back-end. They must have exactly the same
+   prototype and names as below.  */
+
+/* Returns nonzero if we are currently in the global binding level.  */
+extern int global_bindings_p (void);
+
+/* Enter and exit a new binding level.  */
+extern void gnat_pushlevel (void);
+extern void gnat_poplevel (void);
+extern void gnat_zaplevel (void);
+
+/* Set SUPERCONTEXT of the BLOCK for the current binding level to FNDECL
+   and point FNDECL to this BLOCK.  */
+extern void set_current_block_context (tree fndecl);
+
+/* Set the jmpbuf_decl for the current binding level to DECL.  */
+extern void set_block_jmpbuf_decl (tree decl);
+
+/* Get the setjmp_decl, if any, for the current binding level.  */
+extern tree get_block_jmpbuf_decl (void);
+
+/* Records a ..._DECL node DECL as belonging to the current lexical scope
+   and uses GNAT_NODE for location information.  */
+extern void gnat_pushdecl (tree decl, Node_Id gnat_node);
+
+extern void gnat_init_gcc_eh (void);
+extern void gnat_install_builtins (void);
+
+/* Return an integer type with the number of bits of precision given by
+   PRECISION.  UNSIGNEDP is nonzero if the type is unsigned; otherwise
+   it is a signed type.  */
+extern tree gnat_type_for_size (unsigned precision, int unsignedp);
+
+/* Return a data type that has machine mode MODE.  UNSIGNEDP selects
+   an unsigned type; otherwise a signed type is returned.  */
+extern tree gnat_type_for_mode (enum machine_mode mode, int unsignedp);
+
+/* Emit debug info for all global variable declarations.  */
+extern void gnat_write_global_declarations (void);
+
+/* Return the unsigned version of a TYPE_NODE, a scalar type.  */
+extern tree gnat_unsigned_type (tree type_node);
+
+/* Return the signed version of a TYPE_NODE, a scalar type.  */
+extern tree gnat_signed_type (tree type_node);
+
+/* Return 1 if the types T1 and T2 are compatible, i.e. if they can be
+   transparently converted to each other.  */
+extern int gnat_types_compatible_p (tree t1, tree t2);
+
+/* Return true if T, a FUNCTION_TYPE, has the specified list of flags.  */
+extern bool fntype_same_flags_p (const_tree, tree, bool, bool, bool);
+
+/* Create an expression whose value is that of EXPR,
+   converted to type TYPE.  The TREE_TYPE of the value
+   is always TYPE.  This function implements all reasonable
+   conversions; callers should filter out those that are
+   not permitted by the language being compiled.  */
+extern tree convert (tree type, tree expr);
+
+/* Routines created solely for the tree translator's sake. Their prototypes
+   can be changed as desired.  */
+
+/* Initialize the association of GNAT nodes to GCC trees.  */
+extern void init_gnat_to_gnu (void);
+
+/* GNAT_ENTITY is a GNAT tree node for a defining identifier.
+   GNU_DECL is the GCC tree which is to be associated with
+   GNAT_ENTITY. Such gnu tree node is always an ..._DECL node.
+   If NO_CHECK is nonzero, the latter check is suppressed.
+   If GNU_DECL is zero, a previous association is to be reset.  */
+extern void save_gnu_tree (Entity_Id gnat_entity, tree gnu_decl,
+                           bool no_check);
+
+/* GNAT_ENTITY is a GNAT tree node for a defining identifier.
+   Return the ..._DECL node that was associated with it.  If there is no tree
+   node associated with GNAT_ENTITY, abort.  */
+extern tree get_gnu_tree (Entity_Id gnat_entity);
+
+/* Return nonzero if a GCC tree has been associated with GNAT_ENTITY.  */
+extern bool present_gnu_tree (Entity_Id gnat_entity);
+
+/* Initialize the association of GNAT nodes to GCC trees as dummies.  */
+extern void init_dummy_type (void);
+
+/* Make a dummy type corresponding to GNAT_TYPE.  */
+extern tree make_dummy_type (Entity_Id gnat_type);
+
+/* Record TYPE as a builtin type for Ada.  NAME is the name of the type.  */
+extern void record_builtin_type (const char *name, tree type);
+
+/* Given a record type RECORD_TYPE and a list of FIELD_DECL nodes FIELD_LIST,
+   finish constructing the record or union type.  If REP_LEVEL is zero, this
+   record has no representation clause and so will be entirely laid out here.
+   If REP_LEVEL is one, this record has a representation clause and has been
+   laid out already; only set the sizes and alignment.  If REP_LEVEL is two,
+   this record is derived from a parent record and thus inherits its layout;
+   only make a pass on the fields to finalize them.  DEBUG_INFO_P is true if
+   we need to write debug information about this type.  */
+extern void finish_record_type (tree record_type, tree field_list,
+				int rep_level, bool debug_info_p);
+
+/* Wrap up compilation of RECORD_TYPE, i.e. output all the debug information
+   associated with it.  It need not be invoked directly in most cases since
+   finish_record_type takes care of doing so, but this can be necessary if
+   a parallel type is to be attached to the record type.  */
+extern void rest_of_record_type_compilation (tree record_type);
+
+/* Append PARALLEL_TYPE on the chain of parallel types for decl.  */
+extern void add_parallel_type (tree decl, tree parallel_type);
+
+/* Return a FUNCTION_TYPE node.  RETURN_TYPE is the type returned by the
+   subprogram.  If it is VOID_TYPE, then we are dealing with a procedure,
+   otherwise we are dealing with a function.  PARAM_DECL_LIST is a list of
+   PARM_DECL nodes that are the subprogram parameters.  CICO_LIST is the
+   copy-in/copy-out list to be stored into the TYPE_CICO_LIST field.
+   RETURN_UNCONSTRAINED_P is true if the function returns an unconstrained
+   object.  RETURN_BY_DIRECT_REF_P is true if the function returns by direct
+   reference.  RETURN_BY_INVISI_REF_P is true if the function returns by
+   invisible reference.  */
+extern tree create_subprog_type (tree return_type, tree param_decl_list,
+				 tree cico_list, bool return_unconstrained_p,
+				 bool return_by_direct_ref_p,
+				 bool return_by_invisi_ref_p);
+
+/* Return a copy of TYPE, but safe to modify in any way.  */
+extern tree copy_type (tree type);
+
+/* Return a subtype of sizetype with range MIN to MAX and whose
+   TYPE_INDEX_TYPE is INDEX.  GNAT_NODE is used for the position
+   of the associated TYPE_DECL.  */
+extern tree create_index_type (tree min, tree max, tree index,
+			       Node_Id gnat_node);
+
+/* Return a subtype of TYPE with range MIN to MAX.  If TYPE is NULL,
+   sizetype is used.  */
+extern tree create_range_type (tree type, tree min, tree max);
+
+/* Return a TYPE_DECL node suitable for the TYPE_STUB_DECL field of a type.
+   TYPE_NAME gives the name of the type and TYPE is a ..._TYPE node giving
+   its data type.  */
+extern tree create_type_stub_decl (tree type_name, tree type);
+
+/* Return a TYPE_DECL node.  TYPE_NAME gives the name of the type and TYPE
+   is a ..._TYPE node giving its data type.  ARTIFICIAL_P is true if this
+   is a declaration that was generated by the compiler.  DEBUG_INFO_P is
+   true if we need to write debug information about this type.  GNAT_NODE
+   is used for the position of the decl.  */
+extern tree create_type_decl (tree type_name, tree type,
+                              struct attrib *attr_list,
+                              bool artificial_p, bool debug_info_p,
+			      Node_Id gnat_node);
+
+/* Return a VAR_DECL or CONST_DECL node.
+
+   VAR_NAME gives the name of the variable.  ASM_NAME is its assembler name
+   (if provided).  TYPE is its data type (a GCC ..._TYPE node).  VAR_INIT is
+   the GCC tree for an optional initial expression; NULL_TREE if none.
+
+   CONST_FLAG is true if this variable is constant, in which case we might
+   return a CONST_DECL node unless CONST_DECL_ALLOWED_P is false.
+
+   PUBLIC_FLAG is true if this definition is to be made visible outside of
+   the current compilation unit. This flag should be set when processing the
+   variable definitions in a package specification.
+
+   EXTERN_FLAG is nonzero when processing an external variable declaration (as
+   opposed to a definition: no storage is to be allocated for the variable).
+
+   STATIC_FLAG is only relevant when not at top level.  In that case
+   it indicates whether to always allocate storage to the variable.
+
+   GNAT_NODE is used for the position of the decl.  */
+extern tree
+create_var_decl_1 (tree var_name, tree asm_name, tree type, tree var_init,
+		   bool const_flag, bool public_flag, bool extern_flag,
+		   bool static_flag, bool const_decl_allowed_p,
+		   struct attrib *attr_list, Node_Id gnat_node);
+
+/* Wrapper around create_var_decl_1 for cases where we don't care whether
+   a VAR or a CONST decl node is created.  */
+#define create_var_decl(var_name, asm_name, type, var_init,	\
+			const_flag, public_flag, extern_flag,	\
+			static_flag, attr_list, gnat_node)	\
+  create_var_decl_1 (var_name, asm_name, type, var_init,	\
+		     const_flag, public_flag, extern_flag,	\
+		     static_flag, true, attr_list, gnat_node)
+
+/* Wrapper around create_var_decl_1 for cases where a VAR_DECL node is
+   required.  The primary intent is for DECL_CONST_CORRESPONDING_VARs, which
+   must be VAR_DECLs and on which we want TREE_READONLY set to have them
+   possibly assigned to a readonly data section.  */
+#define create_true_var_decl(var_name, asm_name, type, var_init,	\
+			     const_flag, public_flag, extern_flag,	\
+			     static_flag, attr_list, gnat_node)		\
+  create_var_decl_1 (var_name, asm_name, type, var_init,		\
+		     const_flag, public_flag, extern_flag,		\
+		     static_flag, false, attr_list, gnat_node)
+
+/* Record DECL as a global renaming pointer.  */
+extern void record_global_renaming_pointer (tree decl);
+
+/* Invalidate the global renaming pointers.  */
+extern void invalidate_global_renaming_pointers (void);
+
+/* Return a FIELD_DECL node.  FIELD_NAME is the field's name, FIELD_TYPE is
+   its type and RECORD_TYPE is the type of the enclosing record.  If SIZE is
+   nonzero, it is the specified size of the field.  If POS is nonzero, it is
+   the bit position.  PACKED is 1 if the enclosing record is packed, -1 if it
+   has Component_Alignment of Storage_Unit.  If ADDRESSABLE is nonzero, it
+   means we are allowed to take the address of the field; if it is negative,
+   we should not make a bitfield, which is used by make_aligning_type.  */
+extern tree create_field_decl (tree field_name, tree field_type,
+			       tree record_type, tree size, tree pos,
+			       int packed, int addressable);
+
+/* Returns a PARM_DECL node. PARAM_NAME is the name of the parameter,
+   PARAM_TYPE is its type.  READONLY is true if the parameter is
+   readonly (either an In parameter or an address of a pass-by-ref
+   parameter).  */
+extern tree create_param_decl (tree param_name, tree param_type,
+                               bool readonly);
+
+/* Returns a FUNCTION_DECL node.  SUBPROG_NAME is the name of the subprogram,
+   ASM_NAME is its assembler name, SUBPROG_TYPE is its type (a FUNCTION_TYPE
+   node), PARAM_DECL_LIST is the list of the subprogram arguments (a list of
+   PARM_DECL nodes chained through the TREE_CHAIN field).
+
+   INLINE_FLAG, PUBLIC_FLAG, EXTERN_FLAG, and ATTR_LIST are used to set the
+   appropriate fields in the FUNCTION_DECL.  GNAT_NODE gives the location.  */
+extern tree create_subprog_decl (tree subprog_name, tree asm_name,
+                                 tree subprog_type, tree param_decl_list,
+                                 bool inlinee_flag, bool public_flag,
+                                 bool extern_flag,
+				 struct attrib *attr_list, Node_Id gnat_node);
+
+/* Returns a LABEL_DECL node for LABEL_NAME.  */
+extern tree create_label_decl (tree label_name);
+
+/* Set up the framework for generating code for SUBPROG_DECL, a subprogram
+   body. This routine needs to be invoked before processing the declarations
+   appearing in the subprogram.  */
+extern void begin_subprog_body (tree subprog_decl);
+
+/* Finish the definition of the current subprogram BODY and finalize it.  */
+extern void end_subprog_body (tree body);
+
+/* Build a template of type TEMPLATE_TYPE from the array bounds of ARRAY_TYPE.
+   EXPR is an expression that we can use to locate any PLACEHOLDER_EXPRs.
+   Return a constructor for the template.  */
+extern tree build_template (tree template_type, tree array_type, tree expr);
+
+/* Build a 64bit VMS descriptor from a Mechanism_Type, which must specify
+   a descriptor type, and the GCC type of an object.  Each FIELD_DECL
+   in the type contains in its DECL_INITIAL the expression to use when
+   a constructor is made for the type.  GNAT_ENTITY is a gnat node used
+   to print out an error message if the mechanism cannot be applied to
+   an object of that type and also for the name.  */
+extern tree build_vms_descriptor (tree type, Mechanism_Type mech,
+                                  Entity_Id gnat_entity);
+
+/* Build a 32bit VMS descriptor from a Mechanism_Type. See above.  */
+extern tree build_vms_descriptor32 (tree type, Mechanism_Type mech,
+                                  Entity_Id gnat_entity);
+
+/* Build a stub for the subprogram specified by the GCC tree GNU_SUBPROG
+   and the GNAT node GNAT_SUBPROG.  */
+extern void build_function_stub (tree gnu_subprog, Entity_Id gnat_subprog);
+
+/* Build a type to be used to represent an aliased object whose nominal type
+   is an unconstrained array.  This consists of a RECORD_TYPE containing a
+   field of TEMPLATE_TYPE and a field of OBJECT_TYPE, which is an ARRAY_TYPE.
+   If ARRAY_TYPE is that of an unconstrained array, this is used to represent
+   an arbitrary unconstrained object.  Use NAME as the name of the record.
+   DEBUG_INFO_P is true if we need to write debug information for the type.  */
+extern tree build_unc_object_type (tree template_type, tree object_type,
+				   tree name, bool debug_info_p);
+
+/* Same as build_unc_object_type, but taking a thin or fat pointer type
+   instead of the template type.  */
+extern tree build_unc_object_type_from_ptr (tree thin_fat_ptr_type,
+					    tree object_type, tree name,
+					    bool debug_info_p);
+
+/* Shift the component offsets within an unconstrained object TYPE to make it
+   suitable for use as a designated type for thin pointers.  */
+extern void shift_unc_components_for_thin_pointers (tree type);
+
+/* Update anything previously pointing to OLD_TYPE to point to NEW_TYPE.  In
+   the normal case this is just two adjustments, but we have more to do
+   if NEW is an UNCONSTRAINED_ARRAY_TYPE.  */
+extern void update_pointer_to (tree old_type, tree new_type);
+
+/* EXP is an expression for the size of an object.  If this size contains
+   discriminant references, replace them with the maximum (if MAX_P) or
+   minimum (if !MAX_P) possible value of the discriminant.  */
+extern tree max_size (tree exp, bool max_p);
+
+/* Remove all conversions that are done in EXP.  This includes converting
+   from a padded type or to a left-justified modular type.  If TRUE_ADDRESS
+   is true, always return the address of the containing object even if
+   the address is not bit-aligned.  */
+extern tree remove_conversions (tree exp, bool true_address);
+
+/* If EXP's type is an UNCONSTRAINED_ARRAY_TYPE, return an expression that
+   refers to the underlying array.  If its type has TYPE_CONTAINS_TEMPLATE_P,
+   likewise return an expression pointing to the underlying array.  */
+extern tree maybe_unconstrained_array (tree exp);
+
+/* If EXP's type is a VECTOR_TYPE, return EXP converted to the associated
+   TYPE_REPRESENTATIVE_ARRAY.  */
+extern tree maybe_vector_array (tree exp);
+
+/* Return an expression that does an unchecked conversion of EXPR to TYPE.
+   If NOTRUNC_P is true, truncation operations should be suppressed.  */
+extern tree unchecked_convert (tree type, tree expr, bool notrunc_p);
+
+/* Return the appropriate GCC tree code for the specified GNAT_TYPE,
+   the latter being a record type as predicated by Is_Record_Type.  */
+extern enum tree_code tree_code_for_record_type (Entity_Id gnat_type);
+
+/* Return true if GNAT_TYPE is a "double" floating-point type, i.e. whose
+   size is equal to 64 bits, or an array of such a type.  Set ALIGN_CLAUSE
+   according to the presence of an alignment clause on the type or, if it
+   is an array, on the component type.  */
+extern bool is_double_float_or_array (Entity_Id gnat_type,
+				      bool *align_clause);
+
+/* Return true if GNAT_TYPE is a "double" or larger scalar type, i.e. whose
+   size is greater or equal to 64 bits, or an array of such a type.  Set
+   ALIGN_CLAUSE according to the presence of an alignment clause on the
+   type or, if it is an array, on the component type.  */
+extern bool is_double_scalar_or_array (Entity_Id gnat_type,
+				       bool *align_clause);
+
+/* Return true if GNU_TYPE is suitable as the type of a non-aliased
+   component of an aggregate type.  */
+extern bool type_for_nonaliased_component_p (tree gnu_type);
+
+/* Return the base type of TYPE.  */
+extern tree get_base_type (tree type);
+
+/* EXP is a GCC tree representing an address.  See if we can find how
+   strictly the object at that address is aligned.   Return that alignment
+   strictly the object at that address is aligned.   Return that alignment
+   in bits.  If we don't know anything about the alignment, return 0.  */
+extern unsigned int known_alignment (tree exp);
+
+/* Return true if VALUE is a multiple of FACTOR. FACTOR must be a power
+   of 2.  */
+extern bool value_factor_p (tree value, HOST_WIDE_INT factor);
+
+/* Make a binary operation of kind OP_CODE.  RESULT_TYPE is the type
+   desired for the result.  Usually the operation is to be performed
+   in that type.  For MODIFY_EXPR and ARRAY_REF, RESULT_TYPE may be 0
+   in which case the type to be used will be derived from the operands.  */
+extern tree build_binary_op (enum tree_code op_code, tree result_type,
+                             tree left_operand, tree right_operand);
+
+/* Similar, but make unary operation.  */
+extern tree build_unary_op (enum tree_code op_code, tree result_type,
+                            tree operand);
+
+/* Similar, but for COND_EXPR.  */
+extern tree build_cond_expr (tree result_type, tree condition_operand,
+                             tree true_operand, tree false_operand);
+
+/* Similar, but for COMPOUND_EXPR.  */
+
+extern tree build_compound_expr (tree result_type, tree stmt_operand,
+				 tree expr_operand);
+
+/* Similar, but for RETURN_EXPR.  */
+extern tree build_return_expr (tree ret_obj, tree ret_val);
+
+/* Build a CALL_EXPR to call FUNDECL with one argument, ARG.  Return
+   the CALL_EXPR.  */
+extern tree build_call_1_expr (tree fundecl, tree arg);
+
+/* Build a CALL_EXPR to call FUNDECL with two argument, ARG1 & ARG2.  Return
+   the CALL_EXPR.  */
+extern tree build_call_2_expr (tree fundecl, tree arg1, tree arg2);
+
+/* Likewise to call FUNDECL with no arguments.  */
+extern tree build_call_0_expr (tree fundecl);
+
+/* Call a function that raises an exception and pass the line number and file
+   name, if requested.  MSG says which exception function to call.
+
+   GNAT_NODE is the gnat node conveying the source location for which the
+   error should be signaled, or Empty in which case the error is signaled on
+   the current ref_file_name/input_line.
+
+   KIND says which kind of exception this is for
+    (N_Raise_{Constraint,Storage,Program}_Error).  */
+extern tree build_call_raise (int msg, Node_Id gnat_node, char kind);
+
+/* Similar to build_call_raise, for an index or range check exception as
+   determined by MSG, with extra information generated of the form
+   "INDEX out of range FIRST..LAST".  */
+extern tree build_call_raise_range (int msg, Node_Id gnat_node,
+				    tree index, tree first, tree last);
+
+/* Similar to build_call_raise, with extra information about the column
+   where the check failed.  */
+extern tree build_call_raise_column (int msg, Node_Id gnat_node);
+
+/* Return a CONSTRUCTOR of TYPE whose elements are V.  This is not the
+   same as build_constructor in the language-independent tree.c.  */
+extern tree gnat_build_constructor (tree type, VEC(constructor_elt,gc) *v);
+
+/* Return a COMPONENT_REF to access a field that is given by COMPONENT,
+   an IDENTIFIER_NODE giving the name of the field, FIELD, a FIELD_DECL,
+   for the field, or both.  Don't fold the result if NO_FOLD_P.  */
+extern tree build_component_ref (tree record_variable, tree component,
+                                 tree field, bool no_fold_p);
+
+/* Build a GCC tree to call an allocation or deallocation function.
+   If GNU_OBJ is nonzero, it is an object to deallocate.  Otherwise,
+   generate an allocator.
+
+   GNU_SIZE is the number of bytes to allocate and GNU_TYPE is the contained
+   object type, used to determine the to-be-honored address alignment.
+   GNAT_PROC, if present, is a procedure to call and GNAT_POOL is the storage
+   pool to use.  If not present, malloc and free are used.  GNAT_NODE is used
+   to provide an error location for restriction violation messages.  */
+extern tree build_call_alloc_dealloc (tree gnu_obj, tree gnu_size,
+                                      tree gnu_type, Entity_Id gnat_proc,
+				      Entity_Id gnat_pool, Node_Id gnat_node);
+
+/* Build a GCC tree to correspond to allocating an object of TYPE whose
+   initial value if INIT, if INIT is nonzero.  Convert the expression to
+   RESULT_TYPE, which must be some type of pointer.  Return the tree.
+
+   GNAT_PROC and GNAT_POOL optionally give the procedure to call and
+   the storage pool to use.  GNAT_NODE is used to provide an error
+   location for restriction violation messages.  If IGNORE_INIT_TYPE is
+   true, ignore the type of INIT for the purpose of determining the size;
+   this will cause the maximum size to be allocated if TYPE is of
+   self-referential size.  */
+extern tree build_allocator (tree type, tree init, tree result_type,
+                             Entity_Id gnat_proc, Entity_Id gnat_pool,
+                             Node_Id gnat_node, bool);
+
+/* Fill in a VMS descriptor of GNU_TYPE for GNU_EXPR and return the result.
+   GNAT_ACTUAL is the actual parameter for which the descriptor is built.  */
+extern tree fill_vms_descriptor (tree gnu_type, tree gnu_expr,
+                                 Node_Id gnat_actual);
+
+/* Indicate that we need to take the address of T and that it therefore
+   should not be allocated in a register.  Returns true if successful.  */
+extern bool gnat_mark_addressable (tree t);
+
+/* Save EXP for later use or reuse.  This is equivalent to save_expr in tree.c
+   but we know how to handle our own nodes.  */
+extern tree gnat_save_expr (tree exp);
+
+/* Protect EXP for immediate reuse.  This is a variant of gnat_save_expr that
+   is optimized under the assumption that EXP's value doesn't change before
+   its subsequent reuse(s) except through its potential reevaluation.  */
+extern tree gnat_protect_expr (tree exp);
+
+/* This is equivalent to stabilize_reference in tree.c but we know how to
+   handle our own nodes and we take extra arguments.  FORCE says whether to
+   force evaluation of everything.  We set SUCCESS to true unless we walk
+   through something we don't know how to stabilize.  */
+extern tree gnat_stabilize_reference (tree ref, bool force, bool *success);
+
+/* Implementation of the builtin_function langhook.  */
+extern tree gnat_builtin_function (tree decl);
+
+/* Search the chain of currently reachable declarations for a builtin
+   FUNCTION_DECL node corresponding to function NAME (an IDENTIFIER_NODE).
+   Return the first node found, if any, or NULL_TREE otherwise.  */
+extern tree builtin_decl_for (tree name);
+
+/* GNU_TYPE is a type. Determine if it should be passed by reference by
+   default.  */
+extern bool default_pass_by_ref (tree gnu_type);
+
+/* GNU_TYPE is the type of a subprogram parameter.  Determine from the type
+   if it should be passed by reference.  */
+extern bool must_pass_by_ref (tree gnu_type);
+
+/* Return the size of the FP mode with precision PREC.  */
+extern int fp_prec_to_size (int prec);
+
+/* Return the precision of the FP mode with size SIZE.  */
+extern int fp_size_to_prec (int size);
+
+/* These functions return the basic data type sizes and related parameters
+   about the target machine.  */
+
+extern Pos get_target_bits_per_unit (void);
+extern Pos get_target_bits_per_word (void);
+extern Pos get_target_char_size (void);
+extern Pos get_target_wchar_t_size (void);
+extern Pos get_target_short_size (void);
+extern Pos get_target_int_size (void);
+extern Pos get_target_long_size (void);
+extern Pos get_target_long_long_size (void);
+extern Pos get_target_float_size (void);
+extern Pos get_target_double_size (void);
+extern Pos get_target_long_double_size (void);
+extern Pos get_target_pointer_size (void);
+extern Pos get_target_maximum_default_alignment (void);
+extern Pos get_target_default_allocator_alignment (void);
+extern Pos get_target_maximum_allowed_alignment (void);
+extern Pos get_target_maximum_alignment (void);
+extern Nat get_float_words_be (void);
+extern Nat get_words_be (void);
+extern Nat get_bytes_be (void);
+extern Nat get_bits_be (void);
+extern Nat get_target_strict_alignment (void);
+extern Nat get_target_double_float_alignment (void);
+extern Nat get_target_double_scalar_alignment (void);
+
+/* Let code know whether we are targetting VMS without need of
+   intrusive preprocessor directives.  */
+#ifndef TARGET_ABI_OPEN_VMS
+#define TARGET_ABI_OPEN_VMS 0
+#endif
+
+/* VMS macro set by default, when clear forces 32bit mallocs and 32bit
+   Descriptors. Always used in combination with TARGET_ABI_OPEN_VMS
+   so no effect on non-VMS systems.  */
+#ifndef TARGET_MALLOC64
+#define TARGET_MALLOC64 0
+#endif
+
+/* Convenient shortcuts.  */
+#define VECTOR_TYPE_P(TYPE) (TREE_CODE (TYPE) == VECTOR_TYPE)