https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82778
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Created attachment 42502 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42502&action=edit gcc8-pr82778.patch The following untested patch ought to fix it. recog_memoized doesn't handle the important part insn_invalid_p does: /* After reload, verify that all constraints are satisfied. */ so it happily created an instruction that is wrong after reload. I still wonder if the patch shouldn't be reverted or at least if the changes can't be limited to targets that would benefit from that (perhaps target hook to signal it needs it)?
