Am 03.06.2014 16:45, schrieb lvqcl: > 2) to ALL: > I attached a small program. Compile and run it. > * Does it work correctly when compiled with -O3 -msse2 options? > * If yes, does it work correctly when compiled with -O3 -funroll-loops > -msse2 options? > ( and what is the version of your GCC? ) Tested various versions of TDM-GCC on Windows.
32 bit executable produced with TDM-GCC 4.8.1 fails as soon as -O3 and SSE2 come together. SSE2 is enabled by -O3 here, so compiling with -O3 is sufficient to trigger the bug. Compiling with -O3 -mno-sse2 produces a correctly working executable just as -O2 -msse2 does. -funroll-loops does not make any difference. Same with TDM-GCC 4.4.1, 4.5.0, 4.6.1 and 4.7.1; only difference is that -O3 does not include SSE2 there, so it has to be enabled manually with -msse2 to trigger the problem. TDM-GCC 4.3.2 produces a correctly working executable even with -O3 -msse2. 64 bit executables produced with any of the tested GCC versions work correctly in all cases. _______________________________________________ flac-dev mailing list flac-dev@xiph.org http://lists.xiph.org/mailman/listinfo/flac-dev
