https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79173
--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> --- Sorry, in that case nothing needs to be done for riscv. I'm sure aarch64, arm has one (e.g. adcs), I think powerpc has some, but e.g. PR43892 is still open, and I'm sure s390 has them too (alc*, slb*).