re PR rtl-optimization/69217 (ICE at var-tracking.c:5038 Segmentation fault)

	PR rtl-optimization/69217
	* var-tracking.c (tracked_record_parameter_p): Don't segfault if there
	are no TYPE_FIELDS set for the record type.

From-SVN: r232845

gcc/ChangeLog

+2016-01-26  Iain Buclaw  <ibuclaw@gdcproject.org>
+
+	PR rtl-optimization/69217
+	* var-tracking.c (tracked_record_parameter_p): Don't segfault if there
+	are no TYPE_FIELDS set for the record type.
+
 2016-01-26  Jakub Jelinek  <jakub@redhat.com>
 
 	PR target/68662

gcc/var-tracking.c

@@ -5128,7 +5128,8 @@ tracked_record_parameter_p (tree t)
   if (TREE_CODE (type) != RECORD_TYPE)
     return false;
 
-  if (DECL_CHAIN (TYPE_FIELDS (type)) == NULL_TREE)
+  if (TYPE_FIELDS (type) == NULL_TREE
+      || DECL_CHAIN (TYPE_FIELDS (type)) == NULL_TREE)
     return false;
 
   return true;