https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78379
--- Comment #30 from Thomas Koenig <tkoenig at gcc dot gnu.org> --- I think there still is one thing to do. Apparently, AMD CPUs (which use only vanilla at the moment) are slightly faster with -mprefer-avx128, and they should be much faster if they have FMA3. Unless I missed something, it is not possible to specify something like -mprefer-avx128 as a target attribute. What would be the best way to go about this?
