http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48181
--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2013-01-16 23:07:19 UTC --- http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=192719 fixed this (so, most likely reproduceable by disabling LRA).