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7c6811fe RS |
1 | /* Global common subexpression elimination/Partial redundancy elimination |
2 | and global constant/copy propagation for GNU compiler. | |
8d9254fc | 3 | Copyright (C) 1997-2020 Free Software Foundation, Inc. |
7c6811fe RS |
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_GCSE_H | |
22 | #define GCC_GCSE_H | |
23 | ||
24 | /* Target-dependent globals. */ | |
25 | struct target_gcse { | |
26 | /* Nonzero for each mode that supports (set (reg) (reg)). | |
27 | This is trivially true for integer and floating point values. | |
28 | It may or may not be true for condition codes. */ | |
29 | char x_can_copy[(int) NUM_MACHINE_MODES]; | |
30 | ||
31 | /* True if the previous field has been initialized. */ | |
32 | bool x_can_copy_init_p; | |
33 | }; | |
34 | ||
1942d1a9 | 35 | extern struct target_gcse default_target_gcse; |
7c6811fe RS |
36 | #if SWITCHABLE_TARGET |
37 | extern struct target_gcse *this_target_gcse; | |
38 | #else | |
39 | #define this_target_gcse (&default_target_gcse) | |
40 | #endif | |
41 | ||
3edf64aa | 42 | void gcse_c_finalize (void); |
87d8dd6c | 43 | extern bool gcse_or_cprop_is_too_expensive (const char *); |
3edf64aa | 44 | |
7c6811fe | 45 | #endif |