It is a bug in the help message dump. You can see that ftree-loop-vectorize ftree-slp-vectorize are indeed enabled.
David On Thu, Feb 6, 2014 at 10:51 AM, Uros Bizjak <ubiz...@gmail.com> wrote: > Hello! > > 4.9 does not enable -ftree-vectorize for -O3 (and Ofast) anymore. Is > this intentional? > > $/ssd/uros/gcc-build/gcc/xgcc -B /ssd/uros/gcc-build/gcc -O3 -Q > --help=optimizers > > ... > -ftree-vectorize [disabled] > ... > > This is the reason for low scores on SciMark v2.0 as conducted by > Phoronix. Please see comment #18 in [1]. > > [1] > http://phoronix.com/forums/showthread.php?95147-Clang-s-Competition-For-GCC-On-Intel-Haswell/page2 > > Uros.
