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From: "crazylht at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug target/97770] [ICELAKE]Missing vectorization for vpopcnt
Date: Thu, 03 Dec 2020 02:04:08 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97770

--- Comment #13 from Hongtao.liu <crazylht at gmail dot com> ---
(In reply to Richard Biener from comment #10)
> Hmm, but
>=20
> DEF_INTERNAL_INT_FN (POPCOUNT, ECF_CONST | ECF_NOTHROW, popcount, unary)
>=20
> so there's clearly a mismatch between either the vectorizers interpretati=
on
> 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.
>=20
> 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.=