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.
