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e9eb809d | 1 | /* Scalar evolution detector. |
a5544970 | 2 | Copyright (C) 2003-2019 Free Software Foundation, Inc. |
e9eb809d ZD |
3 | Contributed by Sebastian Pop <s.pop@laposte.net> |
4 | ||
5 | This file is part of GCC. | |
6 | ||
7 | GCC is free software; you can redistribute it and/or modify it under | |
8 | the terms of the GNU General Public License as published by the Free | |
9dcd6f09 | 9 | Software Foundation; either version 3, or (at your option) any later |
e9eb809d ZD |
10 | version. |
11 | ||
12 | GCC is distributed in the hope that it will be useful, but WITHOUT ANY | |
13 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
14 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
15 | for more details. | |
16 | ||
17 | You should have received a copy of the GNU General Public License | |
9dcd6f09 NC |
18 | along with GCC; see the file COPYING3. If not see |
19 | <http://www.gnu.org/licenses/>. */ | |
e9eb809d ZD |
20 | |
21 | #ifndef GCC_TREE_SCALAR_EVOLUTION_H | |
22 | #define GCC_TREE_SCALAR_EVOLUTION_H | |
23 | ||
a14865db | 24 | extern tree number_of_latch_executions (struct loop *); |
538dd0b7 | 25 | extern gcond *get_loop_exit_condition (const struct loop *); |
9baba81b | 26 | |
d73be268 | 27 | extern void scev_initialize (void); |
e3a8f1fa | 28 | extern bool scev_initialized_p (void); |
9baba81b | 29 | extern void scev_reset (void); |
a7bf45de | 30 | extern void scev_reset_htab (void); |
9baba81b SP |
31 | extern void scev_finalize (void); |
32 | extern tree analyze_scalar_evolution (struct loop *, tree); | |
a68f286c | 33 | extern tree instantiate_scev (edge, struct loop *, tree); |
c70ed622 | 34 | extern tree resolve_mixers (struct loop *, tree, bool *); |
9baba81b | 35 | extern void gather_stats_on_scev_database (void); |
4cc31a3c | 36 | extern bool final_value_replacement_loop (struct loop *); |
42e6eec5 SP |
37 | extern unsigned int scev_const_prop (void); |
38 | extern bool expression_expensive_p (tree); | |
43aabfcf BC |
39 | extern bool simple_iv_with_niters (struct loop *, struct loop *, tree, |
40 | struct affine_iv *, tree *, bool); | |
84562394 | 41 | extern bool simple_iv (struct loop *, struct loop *, tree, struct affine_iv *, |
71343877 | 42 | bool); |
019d6598 | 43 | extern bool iv_can_overflow_p (struct loop *, tree, tree, tree); |
42e6eec5 | 44 | extern tree compute_overall_effect_of_inner_loop (struct loop *, tree); |
a6f778b2 | 45 | |
6626665f DM |
46 | /* Returns the basic block preceding LOOP, or the CFG entry block when |
47 | the loop is function's body. */ | |
a213b219 SP |
48 | |
49 | static inline basic_block | |
50 | block_before_loop (loop_p loop) | |
51 | { | |
52 | edge preheader = loop_preheader_edge (loop); | |
fefa31b5 | 53 | return (preheader ? preheader->src : ENTRY_BLOCK_PTR_FOR_FN (cfun)); |
a213b219 SP |
54 | } |
55 | ||
3f227a8c JS |
56 | /* Analyze all the parameters of the chrec that were left under a |
57 | symbolic form. LOOP is the loop in which symbolic names have to | |
58 | be analyzed and instantiated. */ | |
59 | ||
60 | static inline tree | |
61 | instantiate_parameters (struct loop *loop, tree chrec) | |
62 | { | |
a68f286c | 63 | return instantiate_scev (loop_preheader_edge (loop), loop, chrec); |
3f227a8c JS |
64 | } |
65 | ||
42fd6772 ZD |
66 | /* Returns the loop of the polynomial chrec CHREC. */ |
67 | ||
68 | static inline struct loop * | |
ed7a4b4b | 69 | get_chrec_loop (const_tree chrec) |
42fd6772 | 70 | { |
0fc822d0 | 71 | return get_loop (cfun, CHREC_VARIABLE (chrec)); |
42fd6772 ZD |
72 | } |
73 | ||
e9eb809d | 74 | #endif /* GCC_TREE_SCALAR_EVOLUTION_H */ |