| /* Global common subexpression elimination/Partial redundancy elimination |
| and global constant/copy propagation for GNU compiler. |
| Copyright (C) 1997-2019 Free Software Foundation, Inc. |
| |
| This file is part of GCC. |
| |
| GCC is free software; you can redistribute it and/or modify it under |
| the terms of the GNU General Public License as published by the Free |
| Software Foundation; either version 3, or (at your option) any later |
| version. |
| |
| GCC is distributed in the hope that it will be useful, but WITHOUT ANY |
| WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| for more details. |
| |
| You should have received a copy of the GNU General Public License |
| along with GCC; see the file COPYING3. If not see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef GCC_GCSE_H |
| #define GCC_GCSE_H |
| |
| /* Target-dependent globals. */ |
| struct target_gcse { |
| /* Nonzero for each mode that supports (set (reg) (reg)). |
| This is trivially true for integer and floating point values. |
| It may or may not be true for condition codes. */ |
| char x_can_copy[(int) NUM_MACHINE_MODES]; |
| |
| /* True if the previous field has been initialized. */ |
| bool x_can_copy_init_p; |
| }; |
| |
| extern struct target_gcse default_target_gcse; |
| #if SWITCHABLE_TARGET |
| extern struct target_gcse *this_target_gcse; |
| #else |
| #define this_target_gcse (&default_target_gcse) |
| #endif |
| |
| void gcse_c_finalize (void); |
| extern bool gcse_or_cprop_is_too_expensive (const char *); |
| |
| #endif |