https://gcc.gnu.org/bugzilla/show_bug.cgi?id=112623
--- Comment #8 from Richard Biener <rguenth at gcc dot gnu.org> --- (In reply to Jakub Jelinek from comment #7) > I think at least x86 doesn't currently have instructions which would support > both, CCing Hongtao to verify that, but not sure if e.g. RISC-V won't have > something eventually for both. Don't we need to check the mode also > somewhere in the vectorizer (so that we don't happily try to vectorize using > it only to get it lowered later to scalar ops during generic vector lowering > (or forwprop?)? As said I think the vectorizer checks this already.
