(form_sum): Undo Sep 28 change.

From-SVN: r5548

gcc/reload.c

@@ -4327,10 +4327,7 @@ form_sum (x, y)
 
   /* Note that if the operands of Y are specified in the opposite
      order in the recursive calls below, infinite recursion will occur.  */
-  if (GET_CODE (y) == PLUS && CONSTANT_P (XEXP (y, 1))
-      /* Moving the constant in with the MEM yields rtl that reload may not
-	 be able to handle when this is an address calculation.  */
-      && GET_CODE (x) != MEM)
+  if (GET_CODE (y) == PLUS && CONSTANT_P (XEXP (y, 1)))
     return form_sum (form_sum (x, XEXP (y, 0)), XEXP (y, 1));
 
   /* If both constant, encapsulate sum.  Otherwise, just form sum.  A