On Wed, Jun 19, 2013 at 8:21 AM, Geyslan Gregório Bem <geyslan@xxxxxxxxx> wrote: > > About technicalities of the option and whether reordering is not really > optimizing as demonstrated in the benchmark. Every complex optimization has cases where it will actually make code worse. All optimizations rely on heuristics, and those heuristics sometimes fail. You have very likely found such a case, which is why I suggested filing a missed-optimization bug report. It may be possible to fix it; I don't know. Since the differences are subtle you should make sure you are using the correct -mtune option for the machine on which you are running your benchmarks. Ian
