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e9eb809d | 1 | /* Scalar evolution detector. |
d652f226 JJ |
2 | Copyright (C) 2003, 2004, 2005, 2007, 2008, 2009, 2010 |
3 | Free Software Foundation, Inc. | |
e9eb809d ZD |
4 | Contributed by Sebastian Pop <s.pop@laposte.net> |
5 | ||
6 | This file is part of GCC. | |
7 | ||
8 | GCC is free software; you can redistribute it and/or modify it under | |
9 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 10 | Software Foundation; either version 3, or (at your option) any later |
e9eb809d ZD |
11 | version. |
12 | ||
13 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
16 | for more details. | |
17 | ||
18 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
19 | along with GCC; see the file COPYING3. If not see |
20 | <http://www.gnu.org/licenses/>. */ | |
e9eb809d ZD |
21 | |
22 | #ifndef GCC_TREE_SCALAR_EVOLUTION_H | |
23 | #define GCC_TREE_SCALAR_EVOLUTION_H | |
24 | ||
a14865db ZD |
25 | extern tree number_of_latch_executions (struct loop *); |
26 | extern tree number_of_exit_cond_executions (struct loop *); | |
726a989a | 27 | extern gimple get_loop_exit_condition (const struct loop *); |
9baba81b | 28 | |
d73be268 | 29 | extern void scev_initialize (void); |
9baba81b | 30 | extern void scev_reset (void); |
a7bf45de | 31 | extern void scev_reset_htab (void); |
9baba81b SP |
32 | extern void scev_finalize (void); |
33 | extern tree analyze_scalar_evolution (struct loop *, tree); | |
a213b219 | 34 | extern tree instantiate_scev (basic_block, struct loop *, tree); |
3cb960c7 | 35 | extern tree resolve_mixers (struct loop *, tree); |
9baba81b SP |
36 | extern void gather_stats_on_scev_database (void); |
37 | extern void scev_analysis (void); | |
42e6eec5 SP |
38 | extern unsigned int scev_const_prop (void); |
39 | extern bool expression_expensive_p (tree); | |
f017bf5e | 40 | extern bool simple_iv (struct loop *, struct loop *, tree, affine_iv *, bool); |
42e6eec5 | 41 | extern tree compute_overall_effect_of_inner_loop (struct loop *, tree); |
a6f778b2 | 42 | |
a213b219 SP |
43 | /* Returns the basic block preceding LOOP or ENTRY_BLOCK_PTR when the |
44 | loop is function's body. */ | |
45 | ||
46 | static inline basic_block | |
47 | block_before_loop (loop_p loop) | |
48 | { | |
49 | edge preheader = loop_preheader_edge (loop); | |
50 | return (preheader ? preheader->src : ENTRY_BLOCK_PTR); | |
51 | } | |
52 | ||
3f227a8c JS |
53 | /* Analyze all the parameters of the chrec that were left under a |
54 | symbolic form. LOOP is the loop in which symbolic names have to | |
55 | be analyzed and instantiated. */ | |
56 | ||
57 | static inline tree | |
58 | instantiate_parameters (struct loop *loop, tree chrec) | |
59 | { | |
a213b219 | 60 | return instantiate_scev (block_before_loop (loop), loop, chrec); |
3f227a8c JS |
61 | } |
62 | ||
42fd6772 ZD |
63 | /* Returns the loop of the polynomial chrec CHREC. */ |
64 | ||
65 | static inline struct loop * | |
ed7a4b4b | 66 | get_chrec_loop (const_tree chrec) |
42fd6772 ZD |
67 | { |
68 | return get_loop (CHREC_VARIABLE (chrec)); | |
69 | } | |
70 | ||
e9eb809d | 71 | #endif /* GCC_TREE_SCALAR_EVOLUTION_H */ |