https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121908
--- Comment #9 from Robin Dapp <rdapp at gcc dot gnu.org> --- > I am seeing a 4-5% exec time slowdown of SPEC 2017 xz_r on Zen4 and Zen5, > both with -Ofast -march=native -flto=128: > > https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=959.417.0 > https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=1288.417.0 This is somewhat expected, unfortunately. A real speedup should be possible once Tamar's early-break changes land. Right now we just do double work because of vector overhead and a scalar epilogue.
