tree.c (free_lang_data): Do not reset boolean_type_node nor char_type_node.

tree.c (free_lang_data): Do not reset boolean_type_node nor char_type_node.

2011-06-01  Richard Guenther  <rguenther@suse.de>

	* tree.c (free_lang_data): Do not reset boolean_type_node nor
	char_type_node.
	* lto-streamer.c (lto_record_common_node): Take node pointer,
	do not register types.
	(lto_preload_common_nodes): Explicitly skip preloading nodes
	that differ between frontends.

	lto/
	* lto-lang.c (lto_register_canonical_types): New function.
	(lto_init): Register common nodes with the canonical type machinery.
	Do not play tricks with char_type_node.

From-SVN: r174519