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

From-SVN: r3007

(layout_record): Avoid overflow in const_size by adding into var_size instead.
From-SVN: r3007
370f6918 · Richard Stallman · cdc5a032 · 370f6918
Commit 370f6918 authored Dec 31, 1992 by Richard Stallman
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gcc/stor-layout.c
+4 -1

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--- 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
 	  {