https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109137
--- Comment #23 from rguenther at suse dot de <rguenther at suse dot de> --- On Thu, 30 Mar 2023, hubicka at gcc dot gnu.org wrote: > https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109137 > > --- Comment #21 from Jan Hubicka <hubicka at gcc dot gnu.org> --- > Zen 1-3 changes were intentional in the original tuning patch (it is also > briefly mentioned in the commit message). By allowing 256 bit AVX moves > instead of 64bit integer moves (or 128bit) we can move bigger blocks of memory > without loops and it was faster in micro-benchmarks I made on all zens, even > on > znver1. > We also automatically go for 128bit moves when ISA allows that. Sure, but this change is IMHO surprising for people on the branch so I'd rather not do this.
