http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55177
--- Comment #10 from Andrew Pinski <pinskia at gcc dot gnu.org> 2013-03-08 15:18:35 UTC --- Eric, I have some patches to improve __builtin_bswap* that I can line up for 4.9. Do you mind if I take this bug? They are located on the pinskia/bytewiseunop branch in git: http://gcc.gnu.org/git/?p=gcc.git;a=shortlog;h=refs/heads/pinskia/bytewiseunop