https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120941
Filip Kastl <pheeck at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|[16 Regression] 10-40% |[16 Regression] 10-40% |slowdown of 519.lbm_r on |slowdown of 519.lbm_r on |Zen{2,3} since |Zen2 since |r16-1644-gaba3b9d3a48a07 |r16-1644-gaba3b9d3a48a07 --- Comment #6 from Filip Kastl <pheeck at gcc dot gnu.org> --- (In reply to Haochen Jiang from comment #5) > I have tried on Zen3 Client machine with -Ofast -flto -march=native/znver2 > and see no regression on both options before and after the commit. Ah, my bad. The Zen3 slowdown must be something else. I forgot to check if the dates match and they don't (the Zen3 slowdown happened earlier than the Zen2 slowdown). So this seems to be only Zen2 issue. Sorry for that.