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- /* Exported functions from alias.c
- Copyright (C) 2004-2015 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
- /* 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 tree component_uses_parent_alias_set_from (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, bool);
- tree reference_alias_ptr_type (tree);
- bool alias_ptr_types_compatible_p (tree, tree);
- /* 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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