http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50255
--- Comment #2 from Andrew Pinski <pinskia at gcc dot gnu.org> 2011-08-31 21:06:43 UTC --- This sounds like http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49538 but without a testcase it is hard to say if it was really on the 4.6 branch or only with RedHat's compiler.