1*e4b17023SJohn Marino /* Global common subexpression elimination/Partial redundancy elimination 2*e4b17023SJohn Marino and global constant/copy propagation for GNU compiler. 3*e4b17023SJohn Marino Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 4*e4b17023SJohn Marino 2006, 2007, 2008, 2009, 2010 Free Software Foundation, Inc. 5*e4b17023SJohn Marino 6*e4b17023SJohn Marino This file is part of GCC. 7*e4b17023SJohn Marino 8*e4b17023SJohn Marino GCC is free software; you can redistribute it and/or modify it under 9*e4b17023SJohn Marino the terms of the GNU General Public License as published by the Free 10*e4b17023SJohn Marino Software Foundation; either version 3, or (at your option) any later 11*e4b17023SJohn Marino version. 12*e4b17023SJohn Marino 13*e4b17023SJohn Marino GCC is distributed in the hope that it will be useful, but WITHOUT ANY 14*e4b17023SJohn Marino WARRANTY; without even the implied warranty of MERCHANTABILITY or 15*e4b17023SJohn Marino FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 16*e4b17023SJohn Marino for more details. 17*e4b17023SJohn Marino 18*e4b17023SJohn Marino You should have received a copy of the GNU General Public License 19*e4b17023SJohn Marino along with GCC; see the file COPYING3. If not see 20*e4b17023SJohn Marino <http://www.gnu.org/licenses/>. */ 21*e4b17023SJohn Marino 22*e4b17023SJohn Marino #ifndef GCC_GCSE_H 23*e4b17023SJohn Marino #define GCC_GCSE_H 24*e4b17023SJohn Marino 25*e4b17023SJohn Marino /* Target-dependent globals. */ 26*e4b17023SJohn Marino struct target_gcse { 27*e4b17023SJohn Marino /* Nonzero for each mode that supports (set (reg) (reg)). 28*e4b17023SJohn Marino This is trivially true for integer and floating point values. 29*e4b17023SJohn Marino It may or may not be true for condition codes. */ 30*e4b17023SJohn Marino char x_can_copy[(int) NUM_MACHINE_MODES]; 31*e4b17023SJohn Marino 32*e4b17023SJohn Marino /* True if the previous field has been initialized. */ 33*e4b17023SJohn Marino bool x_can_copy_init_p; 34*e4b17023SJohn Marino }; 35*e4b17023SJohn Marino 36*e4b17023SJohn Marino extern GTY(()) struct target_gcse default_target_gcse; 37*e4b17023SJohn Marino #if SWITCHABLE_TARGET 38*e4b17023SJohn Marino extern struct target_gcse *this_target_gcse; 39*e4b17023SJohn Marino #else 40*e4b17023SJohn Marino #define this_target_gcse (&default_target_gcse) 41*e4b17023SJohn Marino #endif 42*e4b17023SJohn Marino 43*e4b17023SJohn Marino #endif 44