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[/] [openrisc/] [tags/] [gnu-src/] [gcc-4.5.1/] [gcc-4.5.1-or32-1.0rc1/] [gcc/] [alias.h] - Rev 339
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/* Exported functions from alias.c Copyright (C) 2004, 2007, 2008, 2009 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_ALIAS_H #define GCC_ALIAS_H #include "coretypes.h" /* The type of an alias set. Code currently assumes that variables of this type can take the values 0 (the alias set which aliases everything) and -1 (sometimes indicating that the alias set is unknown, sometimes indicating a memory barrier) and -2 (indicating that the alias set should be set to a unique value but has not been set yet). */ typedef int alias_set_type; extern alias_set_type new_alias_set (void); extern alias_set_type get_alias_set (tree); extern alias_set_type get_deref_alias_set (tree); extern alias_set_type get_varargs_alias_set (void); extern alias_set_type get_frame_alias_set (void); extern bool component_uses_parent_alias_set (const_tree); extern bool alias_set_subset_of (alias_set_type, alias_set_type); extern void record_alias_subset (alias_set_type, alias_set_type); extern void record_component_aliases (tree); extern int alias_sets_conflict_p (alias_set_type, alias_set_type); extern int alias_sets_must_conflict_p (alias_set_type, alias_set_type); extern int objects_must_conflict_p (tree, tree); extern int nonoverlapping_memrefs_p (const_rtx, const_rtx); extern bool insn_alias_sets_conflict_p (rtx, rtx); /* This alias set can be used to force a memory to conflict with all other memories, creating a barrier across which no memory reference can move. Note that there are other legacy ways to create such memory barriers, including an address of SCRATCH. */ #define ALIAS_SET_MEMORY_BARRIER ((alias_set_type) -1) #endif /* GCC_ALIAS_H */
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