Fix hashing of REG/MEM values.

From-SVN: r40499

gcc/ChangeLog

 2001-03-15  Bernd Schmidt  <bernds@redhat.com>
 
+	* cselib.c (hash_rtx): For REG and MEM, just use value of expression
+	without adding in rtx code and mode.
+
 	* config/ia64/ia64.c (maybe_rotate): New function, broken out of
 	ia64_sched_reorder.
 	(ia64_sched_reorder): Call maybe_rotate; also rotate after

gcc/cselib.c

@@ -579,8 +579,7 @@ hash_rtx (x, mode, create)
       if (! e)
 	return 0;
 
-      hash += e->value;
-      return hash ? hash : (unsigned int) MEM;
+      return e->value;
 
     case CONST_INT:
       hash += ((unsigned) CONST_INT << 7) + (unsigned) mode + INTVAL (x);