remove an unneeded as_a<rtx_insn *> ()

gcc/ChangeLog:

2015-10-10  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>

	* function.c (stack_protect_epilogue): Remove as_a<rtx_insn *> ()
	call that isn't needed.

From-SVN: r228675

gcc/ChangeLog

+2015-10-10  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
+
+	* function.c (stack_protect_epilogue): Remove as_a<rtx_insn *> ()
+	call that isn't needed.
+
 2015-10-09  Jeff Law  <law@redhat.com>
 
 	* tree-ssanames.c (flush_ssaname_freelist): Use splice and truncate

gcc/function.c

@@ -4986,7 +4986,7 @@ stack_protect_epilogue (void)
 {
   tree guard_decl = targetm.stack_protect_guard ();
   rtx_code_label *label = gen_label_rtx ();
-  rtx x, y, tmp;
+  rtx x, y;
   rtx_insn *seq;
 
   x = expand_normal (crtl->stack_protect_guard);
@@ -5005,9 +5005,9 @@ stack_protect_epilogue (void)
      things moved out of line.  Since this is the only extant case of adding
      a noreturn function at the rtl level, it doesn't seem worth doing ought
      except adding the prediction by hand.  */
-  tmp = get_last_insn ();
+  rtx_insn *tmp = get_last_insn ();
   if (JUMP_P (tmp))
-    predict_insn_def (as_a <rtx_insn *> (tmp), PRED_NORETURN, TAKEN);
+    predict_insn_def (tmp, PRED_NORETURN, TAKEN);
 
   expand_call (targetm.stack_protect_fail (), NULL_RTX, /*ignore=*/true);
   free_temp_slots ();