https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112548
--- Comment #5 from Filip Kastl <pheeck at gcc dot gnu.org> --- (In reply to Robin Dapp from comment #4) > Judging by the graph it looks like it was slow before, then got faster and > now slower again. Is there some more info on why it got faster in the first > place? Did the patch reverse something or is it rather a secondary effect? > I don't have a zen4 handy to check. Don't know if this helps but I bisected the speedup to g:b583a2940af90d03f535648fef111cb158933f7d.