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