https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102997
--- Comment #4 from hubicka at kam dot mff.cuni.cz --- > Not seen on Haswell (but w/o PGO). Is this PGO specific? There's another > large jump visible end of 2019. This is kabylake LTO+PGO+march=native https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=5.170.0 seems there are no regressions. Does not seem to reproduce on zens with -flto -Ofast -march=native neighter with PGO but non-lto. It is indeed possible that we misbehave based on profile, but I do not see anything related to that in the revision range. Honza