https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86979
--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Any particular tuning option (what -march/-mtune is the default)? Can you attach your auto-host.h? Perhaps could you attach a tarball with -da dumps with the above options, so I can try to figure out why I can't reproduce this?