1/* Global common subexpression elimination/Partial redundancy elimination
2 and global constant/copy propagation for GNU compiler.
3 Copyright (C) 1997-2017 Free Software Foundation, Inc.
4
5This file is part of GCC.
6
7GCC is free software; you can redistribute it and/or modify it under
8the terms of the GNU General Public License as published by the Free
9Software Foundation; either version 3, or (at your option) any later
10version.
11
12GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13WARRANTY; without even the implied warranty of MERCHANTABILITY or
14FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
15for more details.
16
17You should have received a copy of the GNU General Public License
18along 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. */
25struct 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
35extern struct target_gcse default_target_gcse;
36#if SWITCHABLE_TARGET
37extern struct target_gcse *this_target_gcse;
38#else
39#define this_target_gcse (&default_target_gcse)
40#endif
41
42void gcse_c_finalize (void);
43extern bool gcse_or_cprop_is_too_expensive (const char *);
44
45#endif
46