From 2d59d98e014a64f5a48cbb3033f25896b2d9ab79 Mon Sep 17 00:00:00 2001
From: Richard Kenner <kenner@gcc.gnu.org>
Date: Fri, 25 Jul 1997 08:36:27 -0400
Subject: [PATCH] (expand_call): If -fstack-check and temp needed for arg is
 too large,

use alloca.

From-SVN: r14526
---
 gcc/calls.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/gcc/calls.c b/gcc/calls.c
index c510a33a11b..35166a5ea64 100644
--- a/gcc/calls.c
+++ b/gcc/calls.c
@@ -1051,7 +1051,11 @@ expand_call (exp, target, ignore)
 	      rtx copy;
 
 	      if (TYPE_SIZE (type) == 0
-		  || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST)
+		  || TREE_CODE (TYPE_SIZE (type)) != INTEGER_CST
+		  || (flag_stack_check && ! STACK_CHECK_BUILTIN
+		      && (TREE_INT_CST_HIGH (TYPE_SIZE (type)) != 0
+			  || (TREE_INT_CST_LOW (TYPE_SIZE (type))
+			      > STACK_CHECK_MAX_VAR_SIZE * BITS_PER_UNIT))))
 		{
 		  /* This is a variable-sized object.  Make space on the stack
 		     for it.  */