http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41004
--- Comment #7 from Andrew Pinski <pinskia at gcc dot gnu.org> 2012-02-04 03:00:33 UTC --- First off, I think cselim should also be run at -Os. And then we have the issue of tree-ssa-tail-merge not running at -Os.
