2011-05-19  Richard Guenther  <rguenther@suse.de>

	* gimple.c (gimple_types_compatible_p_1): Compare names of
	the types themselves.
	(iterative_hash_gimple_type): And hash them that way.
	(gimple_register_type_1): If we register a main variant properly
	initialize the leader to ourselves.

	lto/
	* lto.c (uniquify_nodes): First register all types before
	fixing up the tree SCC.

From-SVN: r173900