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/* Global common subexpression elimination/Partial redundancy elimination
and global constant/copy propagation for GNU compiler.
Copyright (C) 1997-2017 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