Branch data Line data Source code
1 : : /* Scalar evolution detector.
2 : : Copyright (C) 2003-2024 Free Software Foundation, Inc.
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
9 : : Software Foundation; either version 3, or (at your option) any later
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
18 : : along with GCC; see the file COPYING3. If not see
19 : : <http://www.gnu.org/licenses/>. */
20 : :
21 : : #ifndef GCC_TREE_SCALAR_EVOLUTION_H
22 : : #define GCC_TREE_SCALAR_EVOLUTION_H
23 : :
24 : : extern tree number_of_latch_executions (class loop *);
25 : : extern gcond *get_loop_exit_condition (const class loop *);
26 : : extern gcond *get_loop_exit_condition (const_edge);
27 : :
28 : : extern void scev_initialize (void);
29 : : extern bool scev_initialized_p (void);
30 : : extern void scev_reset (void);
31 : : extern void scev_reset_htab (void);
32 : : extern void scev_finalize (void);
33 : : extern tree analyze_scalar_evolution (class loop *, tree);
34 : : extern tree instantiate_scev (edge, class loop *, tree);
35 : : extern tree resolve_mixers (class loop *, tree, bool *);
36 : : extern void gather_stats_on_scev_database (void);
37 : : extern bool final_value_replacement_loop (class loop *);
38 : : extern unsigned int scev_const_prop (void);
39 : : extern bool expression_expensive_p (tree, bool *);
40 : : extern bool simple_iv_with_niters (class loop *, class loop *, tree,
41 : : struct affine_iv *, tree *, bool);
42 : : extern bool simple_iv (class loop *, class loop *, tree, struct affine_iv *,
43 : : bool);
44 : : extern bool iv_can_overflow_p (class loop *, tree, tree, tree);
45 : : extern tree compute_overall_effect_of_inner_loop (class loop *, tree);
46 : : extern void record_nonwrapping_chrec (tree);
47 : : extern bool nonwrapping_chrec_p (tree);
48 : :
49 : : /* Returns the basic block preceding LOOP, or the CFG entry block when
50 : : the loop is function's body. */
51 : :
52 : : inline basic_block
53 : 241827163 : block_before_loop (loop_p loop)
54 : : {
55 : 241827163 : edge preheader = loop_preheader_edge (loop);
56 : 241827163 : return (preheader ? preheader->src : ENTRY_BLOCK_PTR_FOR_FN (cfun));
57 : : }
58 : :
59 : : /* Analyze all the parameters of the chrec that were left under a
60 : : symbolic form. LOOP is the loop in which symbolic names have to
61 : : be analyzed and instantiated. */
62 : :
63 : : inline tree
64 : 83294627 : instantiate_parameters (class loop *loop, tree chrec)
65 : : {
66 : 83294627 : return instantiate_scev (loop_preheader_edge (loop), loop, chrec);
67 : : }
68 : :
69 : : /* Returns the loop of the polynomial chrec CHREC. */
70 : :
71 : : inline class loop *
72 : 187438938 : get_chrec_loop (const_tree chrec)
73 : : {
74 : 187438938 : return get_loop (cfun, CHREC_VARIABLE (chrec));
75 : : }
76 : :
77 : : #endif /* GCC_TREE_SCALAR_EVOLUTION_H */
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