* alias.h (alias_set_type): Change from HOST_WIDE_INT to int.

From-SVN: r132964

gcc/ChangeLog

+2008-03-05  Ian Lance Taylor  <iant@google.com>
+
+	* alias.h (alias_set_type): Change from HOST_WIDE_INT to int.
+
 2008-03-05  Kenneth Zadeck <zadeck@naturalbridge.com>
 
 	* fwprop.c (update_df): Support width and offset parameters of

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);