re PR ipa/59473 (ice in get_class_context with -O3)

	PR ipa/59473
	* ipa-devirt.c (get_class_context): Do not ICE when type is found
	at wrong offset.

From-SVN: r206012

gcc/ChangeLog

+2013-12-14   Jan Hubicka  <jh@suse.cz>
+
+	PR ipa/59473
+	* ipa-devirt.c (get_class_context): Do not ICE when type is found
+	at wrong offset.
+
 2013-12-16  Jakub Jelinek  <jakub@redhat.com>
 
 	PR libgomp/58756

gcc/ipa-devirt.c

@@ -848,6 +848,10 @@ get_class_context (ipa_polymorphic_call_context *context,
       if (TREE_CODE (type) == TREE_CODE (expected_type)
 	  && types_same_for_odr (type, expected_type))
 	{
+	  /* Type can not contain itself on an non-zero offset.  In that case
+	     just give up.  */
+	  if (offset != 0)
+	    goto give_up;
 	  gcc_assert (offset == 0);
 	  return true;
 	}