re PR middle-end/53433 (ICE in int_mode_for_mode, at stor-layout.c:424 during lto-bootstrap)

2012-07-04  Richard Guenther  <rguenther@suse.de>

	PR middle-end/53433
	* gimple-fold.c (get_base_constructor): Do not return an
	error_mark_node DECL_INITIAL.

From-SVN: r189260

gcc/ChangeLog

 2012-07-04  Richard Guenther  <rguenther@suse.de>
 
+	PR middle-end/53433
+	* gimple-fold.c (get_base_constructor): Do not return an
+	error_mark_node DECL_INITIAL.
+
+2012-07-04  Richard Guenther  <rguenther@suse.de>
+
 	PR tree-optimization/53844
 	* tree-ssa-dse.c (dse_possible_dead_store_p): Properly handle
 	the loop virtual PHI.

gcc/gimple-fold.c

@@ -2713,6 +2713,10 @@ get_base_constructor (tree base, HOST_WIDE_INT *bit_offset,
       if (!DECL_INITIAL (base)
 	  && (TREE_STATIC (base) || DECL_EXTERNAL (base)))
         return error_mark_node;
+      /* Do not return an error_mark_node DECL_INITIAL.  LTO uses this
+         as special marker (_not_ zero ...) for its own purposes.  */
+      if (DECL_INITIAL (base) == error_mark_node)
+	return NULL_TREE;
       return DECL_INITIAL (base);
 
     case ARRAY_REF: