https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83015
--- Comment #11 from Jan Hubicka <hubicka at gcc dot gnu.org> --- I was able to bootstrap on ia64 box (terbium) shortly before the unwind changes went in without the bootstrap miscompare. So does the miscompare still reproduce for you and if so, would be posible to attach dumps?