Upstream-Status: Inappropriate [Backport]
From 8216e1c4c23928723f8e1583bf7e014813bb2c07 Mon Sep 17 00:00:00 2001
From: baldrick <baldrick@138bc75d-0d04-0410-961f-82ee72b054a4>
Date: Sat, 9 Apr 2011 16:14:07 +0000
Subject: [PATCH 094/200] Bail out rather than crashing in array_type_nelts if TYPE_MAX_VALUE is null.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/branches/gcc-4_6-branch@172226 138bc75d-0d04-0410-961f-82ee72b054a4

index 405b549..4d6ca36 100644
--- a/gcc/tree.c
+++ b/gcc/tree.c
@@ -2453,6 +2453,10 @@ array_type_nelts (const_tree type)
   min = TYPE_MIN_VALUE (index_type);
   max = TYPE_MAX_VALUE (index_type);
 
+  /* TYPE_MAX_VALUE may not be set if the array has unknown length.  */
+  if (!max)
+    return error_mark_node;
+
   return (integer_zerop (min)
 	  ? max
 	  : fold_build2 (MINUS_EXPR, TREE_TYPE (max), max, min));
-- 
1.7.0.4