https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97770
--- Comment #13 from Hongtao.liu <crazylht at gmail dot com> --- (In reply to Richard Biener from comment #10) > Hmm, but > > DEF_INTERNAL_INT_FN (POPCOUNT, ECF_CONST | ECF_NOTHROW, popcount, unary) > > so there's clearly a mismatch between either the vectorizers interpretation > or the optab. But as far as I can see this is not a direct internal fn so > vectorizable_internal_function shouldn't apply and I do not see the x86 > backend handle POPCOUNT in the vectorizable function target hook. > > So w/o a compiler capable I can't trace how the vectorizer vectorizes this > and thus I have no idea where it goes wrong ... capable compiler is ready.
