https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86314
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 44322 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44322&action=edit gcc9-pr86314.patch Untested fix. The peephole2s didn't expect that an insn with a set of flags and some other set could use the reg it wants to clear inside of the lhs of the second set.