* stor-layout.c (mode_for_size_tree): Use BLKmode if SIZE overflows.

From-SVN: r66305

gcc/ChangeLog

@@ -37,6 +37,8 @@
 
 2003-04-30  Richard Kenner  <kenner@vlsi1.ultra.nyu.edu>
 
+	* stor-layout.c (mode_for_size_tree): Use BLKmode if SIZE overflows.
+
 	* doc/install.texi (--enable-threads): Document "gnat" option.
 
 2003-04-30  Gabriel Dos Reis <gdr@integrable-solutions.net>

gcc/stor-layout.c

@@ -243,6 +243,7 @@ mode_for_size_tree (size, class, limit)
      int limit;
 {
   if (TREE_CODE (size) != INTEGER_CST
+      || TREE_OVERFLOW (size)
       /* What we really want to say here is that the size can fit in a
 	 host integer, but we know there's no way we'd find a mode for
 	 this many bits, so there's no point in doing the precise test.  */