|
0
|
1 /* Scalar evolution detector.
|
|
|
2 Copyright (C) 2003, 2004, 2005, 2007, 2008 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 (struct loop *);
|
|
|
25 extern tree number_of_exit_cond_executions (struct loop *);
|
|
|
26 extern gimple get_loop_exit_condition (const struct loop *);
|
|
|
27
|
|
|
28 extern void scev_initialize (void);
|
|
|
29 extern void scev_reset (void);
|
|
|
30 extern void scev_finalize (void);
|
|
|
31 extern tree analyze_scalar_evolution (struct loop *, tree);
|
|
|
32 extern tree instantiate_scev (basic_block, struct loop *, tree);
|
|
|
33 extern tree resolve_mixers (struct loop *, tree);
|
|
|
34 extern void gather_stats_on_scev_database (void);
|
|
|
35 extern void scev_analysis (void);
|
|
|
36 unsigned int scev_const_prop (void);
|
|
|
37
|
|
|
38 bool expression_expensive_p (tree);
|
|
|
39 extern bool simple_iv (struct loop *, struct loop *, tree, affine_iv *, bool);
|
|
|
40
|
|
|
41 /* Returns the basic block preceding LOOP or ENTRY_BLOCK_PTR when the
|
|
|
42 loop is function's body. */
|
|
|
43
|
|
|
44 static inline basic_block
|
|
|
45 block_before_loop (loop_p loop)
|
|
|
46 {
|
|
|
47 edge preheader = loop_preheader_edge (loop);
|
|
|
48 return (preheader ? preheader->src : ENTRY_BLOCK_PTR);
|
|
|
49 }
|
|
|
50
|
|
|
51 /* Analyze all the parameters of the chrec that were left under a
|
|
|
52 symbolic form. LOOP is the loop in which symbolic names have to
|
|
|
53 be analyzed and instantiated. */
|
|
|
54
|
|
|
55 static inline tree
|
|
|
56 instantiate_parameters (struct loop *loop, tree chrec)
|
|
|
57 {
|
|
|
58 return instantiate_scev (block_before_loop (loop), loop, chrec);
|
|
|
59 }
|
|
|
60
|
|
|
61 /* Returns the loop of the polynomial chrec CHREC. */
|
|
|
62
|
|
|
63 static inline struct loop *
|
|
|
64 get_chrec_loop (const_tree chrec)
|
|
|
65 {
|
|
|
66 return get_loop (CHREC_VARIABLE (chrec));
|
|
|
67 }
|
|
|
68
|
|
|
69 #endif /* GCC_TREE_SCALAR_EVOLUTION_H */
|
