2011-12-19  Richard Guenther  <rguenther@suse.de>

	PR lto/51572
	* tree.c (free_lang_data_in_type): Do not unlink TYPE_DECL
	from TYPE_FIELDS.
	(find_decls_types_r): Walk TYPE_DECLs in TYPE_FIELDS.
	* tree-streamer-out.c (write_ts_field_decl_tree_pointers): Do
	not stream TREE_CHAIN.
	(write_ts_type_non_common_tree_pointers): Stream TYPE_FIELDS
	using streamer_write_chain.
	* tree-streamer-in.c (lto_input_ts_field_decl_tree_pointers):
	Do not stream TREE_CHAIN.
	(lto_input_ts_type_non_common_tree_pointers): Stream TYPE_FIELDS
	using streamer_read_chain.
	* gimple-streamer-in.c (input_gimple_stmt): Skip non-FIELD_DECLs.
	* gimple.c (gimple_canonical_types_compatible_p): Properly
	handle trailing non-FIELD_DECLs in TYPE_FIELDS.

	* g++.dg/lto/pr51572-2_0.C: New testcase.

From-SVN: r182479