http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53315
--- Comment #17 from Uros Bizjak <ubizjak at gmail dot com> 2012-05-12 16:36:39 UTC --- (In reply to comment #15) > Do you think machine reorg could be done without slowing down the compiler? Yes, xbegin RTM pattern can raise a flag that triggers machine reorg (so it won't fire for functions that don't emit xbegin).