http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47167
--- Comment #9 from Martin Reinecke <mar...@mpa-garching.mpg.de> 2011-01-19 17:26:31 UTC --- (In reply to comment #8) > Can you check if the following patch solves your problem? Yes, this patch gets performance back to normal on the 4.5 branch and on trunk. Great! > The differences in GIMPLE of the patch do not explain the code-differences > though, so it might be just bad luck that the patch regressed things for > you. I can see other unwanted differences though. I would of course be happy if the code generation would be less "erratic", and if the nice performance I'm seeing does not depend on my luck ;) So if I can do anything to help optimizing this kind of code more consistently, please let me know! Of course, I'm more into numerics than into compiler writing ...
