s390.c (s390_decompose_address): Use arg_pointer_rtx for comparison.

	* config/s390/s390.c (s390_decompose_address): Use arg_pointer_rtx
	for comparison.

From-SVN: r58799

gcc/ChangeLog

+2002-11-04  Ulrich Weigand  <uweigand@de.ibm.com>
+
+	* config/s390/s390.c (s390_decompose_address): Use arg_pointer_rtx
+	for comparison.
+
 2002-11-04  Aldy Hernandez  <aldyh@redhat.com>
 
 	* hard-reg-set.h (REG_CANNOT_CHANGE_MODE_P): New.

gcc/config/s390/s390.c

@@ -1605,12 +1605,11 @@ s390_decompose_address (addr, out)
 	     Thus we don't check the displacement for validity here.  If after
 	     elimination the displacement turns out to be invalid after all,
 	     this is fixed up by reload in any case.  */
-	  if ((base && REGNO (base) == ARG_POINTER_REGNUM)
-	      || (indx && REGNO (indx) == ARG_POINTER_REGNUM))
-	    ;
-
-	  else if (INTVAL (disp) < 0 || INTVAL (disp) >= 4096)
-	    return FALSE;
+	  if (base != arg_pointer_rtx && indx != arg_pointer_rtx)
+	    {
+	      if (INTVAL (disp) < 0 || INTVAL (disp) >= 4096)
+	        return FALSE;
+	    }
         }
 
       /* In the small-PIC case, the linker converts @GOT12