http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46590
--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-21 18:56:58 UTC --- Please strip down the testcase and provide -ftime-report output (I suppose you hit IVOPTs slowness, so try -fno-ivopts).