https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109780
--- Comment #10 from Alexander Monakov <amonakov at gcc dot gnu.org> --- (In reply to Martin Liška from comment #9) > Started with zen tuning revision r13-4839-geef81eefcdc2a5. The issue is also reproducible with -march=haswell or -march=skylake, so you can use those for further bisection.