PR c/36507

[pf3gnuchains/gcc-fork.git] / gcc / alias.h

diff --git a/gcc/alias.h b/gcc/alias.h
index b9d954e..73811d3 100644 (file)
--- a/gcc/alias.h
+++ b/gcc/alias.h
@@ -22,8 +22,13 @@ along with GCC; see the file COPYING3.  If not see
 
 #include "coretypes.h"
 
-/* The type of an alias set.  */
-typedef HOST_WIDE_INT alias_set_type;
+/* 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);