* loop.c: (invariant_p, case REG): hard_frame_pointer_rtx is invariant.

From-SVN: r5461

gcc/loop.c

@@ -2661,7 +2661,8 @@ invariant_p (x)
     case REG:
       /* We used to check RTX_UNCHANGING_P (x) here, but that is invalid
 	 since the reg might be set by initialization within the loop.  */
-      if (x == frame_pointer_rtx || x == arg_pointer_rtx)
+      if (x == frame_pointer_rtx || x == hard_frame_pointer_rtx
+	  || x == arg_pointer_rtx)
 	return 1;
       if (loop_has_call
 	  && REGNO (x) < FIRST_PSEUDO_REGISTER && call_used_regs[REGNO (x)])