2013-10-15  Richard Biener  <rguenther@suse.de>

	lto/
	* lto.c (hash_canonical_type): Split out from ...
	(iterative_hash_canonical_type): ... here.  Register types
	we recurse to.
	(gimple_canonical_type_hash): Adjust.
	(gimple_register_canonical_type_1): Split out from ...
	(gimple_register_canonical_type): ... here.  Cache computed
	hash value.
	(lto_register_canonical_types): Split into two modes,
	clearing and computing TYPE_CANONICAL.
	(lto_read_decls): Adjust.
	(read_cgraph_and_symbols): Do two passes over global trees,
	first clearing then computing TYPE_CANONICAL.

From-SVN: r203600