1*38fd1498Szrj /* Global common subexpression elimination/Partial redundancy elimination 2*38fd1498Szrj and global constant/copy propagation for GNU compiler. 3*38fd1498Szrj Copyright (C) 1997-2018 Free Software Foundation, Inc. 4*38fd1498Szrj 5*38fd1498Szrj This file is part of GCC. 6*38fd1498Szrj 7*38fd1498Szrj GCC is free software; you can redistribute it and/or modify it under 8*38fd1498Szrj the terms of the GNU General Public License as published by the Free 9*38fd1498Szrj Software Foundation; either version 3, or (at your option) any later 10*38fd1498Szrj version. 11*38fd1498Szrj 12*38fd1498Szrj GCC is distributed in the hope that it will be useful, but WITHOUT ANY 13*38fd1498Szrj WARRANTY; without even the implied warranty of MERCHANTABILITY or 14*38fd1498Szrj FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 15*38fd1498Szrj for more details. 16*38fd1498Szrj 17*38fd1498Szrj You should have received a copy of the GNU General Public License 18*38fd1498Szrj along with GCC; see the file COPYING3. If not see 19*38fd1498Szrj <http://www.gnu.org/licenses/>. */ 20*38fd1498Szrj 21*38fd1498Szrj #ifndef GCC_GCSE_H 22*38fd1498Szrj #define GCC_GCSE_H 23*38fd1498Szrj 24*38fd1498Szrj /* Target-dependent globals. */ 25*38fd1498Szrj struct target_gcse { 26*38fd1498Szrj /* Nonzero for each mode that supports (set (reg) (reg)). 27*38fd1498Szrj This is trivially true for integer and floating point values. 28*38fd1498Szrj It may or may not be true for condition codes. */ 29*38fd1498Szrj char x_can_copy[(int) NUM_MACHINE_MODES]; 30*38fd1498Szrj 31*38fd1498Szrj /* True if the previous field has been initialized. */ 32*38fd1498Szrj bool x_can_copy_init_p; 33*38fd1498Szrj }; 34*38fd1498Szrj 35*38fd1498Szrj extern struct target_gcse default_target_gcse; 36*38fd1498Szrj #if SWITCHABLE_TARGET 37*38fd1498Szrj extern struct target_gcse *this_target_gcse; 38*38fd1498Szrj #else 39*38fd1498Szrj #define this_target_gcse (&default_target_gcse) 40*38fd1498Szrj #endif 41*38fd1498Szrj 42*38fd1498Szrj void gcse_c_finalize (void); 43*38fd1498Szrj extern bool gcse_or_cprop_is_too_expensive (const char *); 44*38fd1498Szrj 45*38fd1498Szrj #endif 46