From: Richard Stallman <rms@gnu.org>
Date: Thu, 31 Dec 1992 08:33:11 +0000 (+0000)
Subject: (layout_record): Avoid overflow in const_size by adding into var_size instead.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=370f6918c29c709f62ec7a9c1265647d87dc1c88;p=gcc.git

(layout_record): Avoid overflow in const_size by adding into var_size instead.

From-SVN: r3007
---

diff --git a/gcc/stor-layout.c b/gcc/stor-layout.c
index e2808020414..3d1ce08e26c 100644
--- a/gcc/stor-layout.c
+++ b/gcc/stor-layout.c
@@ -451,7 +451,10 @@ layout_record (rec)
 	   printed in finish_struct.  */
 	if (dsize == 0)
 	  /* Do nothing.  */;
-	else if (TREE_CODE (dsize) == INTEGER_CST)
+	else if (TREE_CODE (dsize) == INTEGER_CST
+		 && TREE_INT_CST_HIGH (dsize) == 0
+		 && TREE_INT_CST_LOW (dsize) + const_size > const_size)
+	  /* Use const_size if there's no overflow.  */
 	  const_size += TREE_INT_CST_LOW (dsize);
 	else
 	  {