function.c (stack_protect_epilogue): Use if rather than switch for check…

function.c (stack_protect_epilogue): Use if rather than switch for check targetm.have_stack_protect_test.

2015-07-08  Kito Cheng  <kito.cheng@gmail.com>

	* function.c (stack_protect_epilogue): Use if rather than switch for
	check targetm.have_stack_protect_test.

From-SVN: r225599

gcc/ChangeLog

+2015-07-08  Kito Cheng  <kito.cheng@gmail.com>
+
+	* function.c (stack_protect_epilogue): Use if rather than switch for
+	check targetm.have_stack_protect_test.
+
 2015-07-08  Trevor Saunders  <tbsaunde+gcc@tbsaunde.org>
 
 	* defaults.h: Provide default for WORD_REGISTER_OPERATIONS.

gcc/function.c

@@ -4874,26 +4874,18 @@ stack_protect_epilogue (void)
   tree guard_decl = targetm.stack_protect_guard ();
   rtx_code_label *label = gen_label_rtx ();
   rtx x, y, tmp;
+  rtx_insn *seq;
 
   x = expand_normal (crtl->stack_protect_guard);
   y = expand_normal (guard_decl);
 
   /* Allow the target to compare Y with X without leaking either into
      a register.  */
-  switch (targetm.have_stack_protect_test ())
-    {
-    case 1:
-      if (rtx_insn *seq = targetm.gen_stack_protect_test (x, y, label))
-	{
-	  emit_insn (seq);
-	  break;
-	}
-      /* FALLTHRU */
-
-    default:
-      emit_cmp_and_jump_insns (x, y, EQ, NULL_RTX, ptr_mode, 1, label);
-      break;
-    }
+  if (targetm.have_stack_protect_test ()
+      && ((seq = targetm.gen_stack_protect_test (x, y, label)) != NULL_RTX))
+    emit_insn (seq);
+  else
+    emit_cmp_and_jump_insns (x, y, EQ, NULL_RTX, ptr_mode, 1, label);
 
   /* The noreturn predictor has been moved to the tree level.  The rtl-level
      predictors estimate this branch about 20%, which isn't enough to get