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Diffstat (limited to 'gcc/tree-scalar-evolution.h')
| -rw-r--r-- | gcc/tree-scalar-evolution.h | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/gcc/tree-scalar-evolution.h b/gcc/tree-scalar-evolution.h new file mode 100644 index 000000000..dd1bdfc34 --- /dev/null +++ b/gcc/tree-scalar-evolution.h @@ -0,0 +1,71 @@ +/* Scalar evolution detector. + Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010 + Free Software Foundation, Inc. + Contributed by Sebastian Pop <s.pop@laposte.net> + +This file is part of GCC. + +GCC is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 3, or (at your option) any later +version. + +GCC is distributed in the hope that it will be useful, but WITHOUT 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 +along with GCC; see the file COPYING3. If not see +<http://www.gnu.org/licenses/>. */ + +#ifndef GCC_TREE_SCALAR_EVOLUTION_H +#define GCC_TREE_SCALAR_EVOLUTION_H + +extern tree number_of_latch_executions (struct loop *); +extern tree number_of_exit_cond_executions (struct loop *); +extern gimple get_loop_exit_condition (const struct loop *); + +extern void scev_initialize (void); +extern void scev_reset (void); +extern void scev_reset_htab (void); +extern void scev_finalize (void); +extern tree analyze_scalar_evolution (struct loop *, tree); +extern tree instantiate_scev (basic_block, struct loop *, tree); +extern tree resolve_mixers (struct loop *, tree); +extern void gather_stats_on_scev_database (void); +extern void scev_analysis (void); +extern unsigned int scev_const_prop (void); +extern bool expression_expensive_p (tree); +extern bool simple_iv (struct loop *, struct loop *, tree, affine_iv *, bool); +extern tree compute_overall_effect_of_inner_loop (struct loop *, tree); + +/* Returns the basic block preceding LOOP or ENTRY_BLOCK_PTR when the + loop is function's body. */ + +static inline basic_block +block_before_loop (loop_p loop) +{ + edge preheader = loop_preheader_edge (loop); + return (preheader ? preheader->src : ENTRY_BLOCK_PTR); +} + +/* Analyze all the parameters of the chrec that were left under a + symbolic form. LOOP is the loop in which symbolic names have to + be analyzed and instantiated. */ + +static inline tree +instantiate_parameters (struct loop *loop, tree chrec) +{ + return instantiate_scev (block_before_loop (loop), loop, chrec); +} + +/* Returns the loop of the polynomial chrec CHREC. */ + +static inline struct loop * +get_chrec_loop (const_tree chrec) +{ + return get_loop (CHREC_VARIABLE (chrec)); +} + +#endif /* GCC_TREE_SCALAR_EVOLUTION_H */ |