* gimple.c (gtc_visited, gtc_ob, type_pair_hash, type_pair_eq): Remove.

	* gimple.c (gtc_visited, gtc_ob, type_pair_hash, type_pair_eq): Remove.
	(GIMPLE_TYPE_PAIR_SIZE): New macro.
	(type_pair_cache): New static var.
	(lookup_type_pair): Use fixed sized custom hash; make inline.
	(gtc_visit, gimple_types_compatible_p, gimple_register_type_1): Update
	calls of lookup_type_pair.
	(print_gimple_types_stats): Remove cache stats.
	(free_gimple_type_tables): Free type_pair_cache instead of gtc_visited
	and gtc_ob.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@173925 138bc75d-0d04-0410-961f-82ee72b054a4