http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54073
--- Comment #10 from Uros Bizjak <ubizjak at gmail dot com> 2012-11-13 15:13:56 UTC --- (In reply to comment #8) > The attached proof of concept patch attempts to just restore the 4.6 and > earlier behavior by allowing in all comparisons. Of course perhaps it might > be > possible it needs better tuning than that, I meant it just as a start for > discussions. Please see PR53346, from comment 14 onwards, especially H.J.'s comment: -quote- I was told that cmov wins if branch is mispredicted, otherwise cmov loses. We will investigate if we can improve cmov in GCC. -/quote-
