From: Richard Kenner <kenner@gcc.gnu.org>
Date: Thu, 17 Jul 1997 15:26:30 +0000 (-0400)
Subject: (expand_decl): If stack checking, use alloca for large vars.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=5e4ef18a2b522c476698239fe541ddaff1d6d6b4;p=gcc.git

(expand_decl): If stack checking, use alloca for large vars.

From-SVN: r14472
---

diff --git a/gcc/stmt.c b/gcc/stmt.c
index fb17900046c..0dcb4cba8cb 100644
--- a/gcc/stmt.c
+++ b/gcc/stmt.c
@@ -3573,7 +3573,11 @@ expand_decl (decl)
 			   / BITS_PER_UNIT));
     }
 
-  else if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST)
+  else if (TREE_CODE (DECL_SIZE (decl)) == INTEGER_CST
+	   && ! (flag_stack_check && ! STACK_CHECK_BUILTIN
+		 && (TREE_INT_CST_HIGH (DECL_SIZE (decl)) != 0
+		     || (TREE_INT_CST_LOW (DECL_SIZE (decl))
+			 > STACK_CHECK_MAX_VAR_SIZE * BITS_PER_UNIT))))
     {
       /* Variable of fixed size that goes on the stack.  */
       rtx oldaddr = 0;