http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49452
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-06-17 16:55:48 UTC --- > I haven't looked at in great detail yet to analyse what causes this problem > but > it appears to have appeared in the last week or so. Maybe r175063 (significant dse.c change).