cp:
	PR c++/3986
	* class.c (force_canonical_binfo_r): Check & move an indirect
	primary base first.
	(force_canonical_binfo): Check that it's not already
	canonical.
	(mark_primary_virtual_base): Remove BINFO parameter.
	(mark_primary_bases): Adjust, set BINFO_LOST_PRIMARY_P here.
testsuite:
	PR c++/3986
	* g++.dg/abi/vbase1.C: New test.

From-SVN: r45435