http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53957
--- Comment #6 from Tobias Burnus <burnus at gcc dot gnu.org> 2012-07-18 14:04:45 UTC --- Created attachment 27823 --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=27823 Draft patch: Change comparison into bool assignment, decrement conditional jump (In reply to comment #5) > If you do > exit = countm1 == 0; > countm1--; > > if (exit) goto exit_label; > it would work for this case. If I apply the attached patch, I do not see any performance difference on my AMD Athlon64 x2 4800+ with -Ofast -funroll-loops -march=native. real 3m45.711s 3m45.589s 3m44.308s | 3m45.363s 3m45.328s 3m44.220s user 3m45.710s 3m45.582s 3m44.274s | 3m45.282s 3m45.286s 3m44.218s
