| /* 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 */ |
