2010-11-26  Richard Guenther  <rguenther@suse.de>

	PR lto/46648
	* gimple.c (gtc_visit): Do not return true for members of an
	SCC still being processed but the current lattice value of
	the member.  Treat SCC members comparison state as lattice,
	starting at equal, eventually dropping to unequal.
	(gimple_types_compatible_p_1): Likewise.

	* gcc.dg/lto/20101125-1_0.c: New testcase.
	* gcc.dg/lto/20101125-1_1.c: Likewise.

From-SVN: r167183