/* Exported functions from alias.c
- Copyright (C) 2004, 2007 Free Software Foundation, Inc.
+ Copyright (C) 2004, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of GCC.
#ifndef GCC_ALIAS_H
#define GCC_ALIAS_H
-/* The type of an alias set. */
-typedef HOST_WIDE_INT alias_set_type;
+#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 (tree);
+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