* ipa-devirt.c (set_type_binfo): New function.
	(add_type_duplicate): Use it.
	(get_odr_type): Sanity check that binfos points to main variants.
	(get_class_context): Be sure the context's outer_type is main variant.
	(contains_type_p): Walk main variant.
	(get_polymorphic_call_info_for_decl): Set outer_type to be main variant.
	(get_polymorphic_call_info): Likewise.
	(possible_polymorphic_call_targets): Sanity check that we operate on main
	variant.

From-SVN: r212107