ipa-devirt.c (type_with_linkage_p): New function.

	* ipa-devirt.c (type_with_linkage_p): New function.
	(type_in_anonymous_namespace_p): Move here from tree.c; assert that
	type has linkage.
	(odr_type_p): Move here from ipa-utils.h; use type_with_linkage_p.
	(can_be_name_hashed_p): Simplify.
	(hash_odr_name): Check that type has linkage before checking if it is
	anonymous.
	(types_same_for_odr): Likewise.
	(odr_name_hasher::equal): Likewise.
	(odr_subtypes_equivalent_p): Likewise.
	(warn_types_mismatch): Likewise.
	(get_odr_type): Likewise.
	(odr_types_equivalent_p): Fix checking of TYPE_MAIN_VARIANT.
	* ipa-utils.h (odr_type_p): Move offline.
	* tree.c (need_assembler_name_p): Fix handling of types
	without linkages.
	(type_in_anonymous_namespace_p): Move to ipa-devirt.c

From-SVN: r223094