re PR lto/50430 (Constructors of static external vars are throwed away leading…

re PR lto/50430 (Constructors of static external vars are throwed away leading to missed optimizations (and ipa-cp ICE).)

	PR lto/50430
	* gimple-fold.c (gimple_get_virt_method_for_binfo): Do not ICE on
	error_mark_node in the DECL_INITIAL of vtable.

From-SVN: r178908

gcc/ChangeLog

+2011-09-15   Jan Hubicka  <jh@suse.cz>
+
+	PR lto/50430
+	* gimple-fold.c (gimple_get_virt_method_for_binfo): Do not ICE on
+	error_mark_node in the DECL_INITIAL of vtable.
+
 2011-09-15   Diego Novillo  <dnovillo@google.com>
 
 	* Makefile.in (SYSROOT_CFLAGS_FOR_TARGET): Define from

gcc/gimple-fold.c

@@ -3048,7 +3048,8 @@ gimple_get_virt_method_for_binfo (HOST_WIDE_INT token, tree known_binfo)
 
   if (TREE_CODE (v) != VAR_DECL
       || !DECL_VIRTUAL_P (v)
-      || !DECL_INITIAL (v))
+      || !DECL_INITIAL (v)
+      || DECL_INITIAL (v) == error_mark_node)
     return NULL_TREE;
   gcc_checking_assert (TREE_CODE (TREE_TYPE (v)) == ARRAY_TYPE);
   size = tree_low_cst (TYPE_SIZE (TREE_TYPE (TREE_TYPE (v))), 1);