------- Comment #6 from martin at mpa-garching dot mpg dot de 2006-03-02 13:52 ------- (In reply to comment #5)
> Can you try "-O3 -fwrapv"? It might be the source have undefined code in it > for signed overflow and changes to VRP exposed it. Bingo! Thanks for this hint, I wouldn't have found that alone! > Also do you know which file is being miscompiled? If so can you attach the > dump generated by doing -O3 -fdump-tree-vrp-details? Unfortunately I don't know which file causes the problem. I'm not a FFTW developer, I just stumbled on this by accident. If I understand correctly, this is most likely a bug in FFTW, right? If so, I'll report it to FFTW people. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26528
