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From: "rguenther at suse dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/106910] roundss not vectorized
Date: Thu, 15 Sep 2022 11:40:28 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106910

--- Comment #5 from rguenther at suse dot de <rguenther at suse dot de> ---
On Thu, 15 Sep 2022, crazylht at gmail dot com wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106910
>=20
> --- Comment #4 from Hongtao.liu <crazylht at gmail dot com> ---
>=20
> > The vectorizer would go the direct internal fn way for those, querying =
the
> > floor optab but the x86 backend only has scalar modes supported for the
> > rounding optabs.
> For CFN_BUILT_IN_ICEIL, the modifier is narrow, and currently vectorizabl=
e_call
> require op_in and op_out to be simple_integer_narrowing, which means it f=
ails
> to go the direct internal fn way.
>=20
> ---------cut from vectorizable_call-----------
>   tree_code convert_code =3D ERROR_MARK;
>   if (cfn !=3D CFN_LAST
>       && (modifier =3D=3D NONE
>           || (modifier =3D=3D NARROW
>               && simple_integer_narrowing (vectype_out, vectype_in,
>                                            &convert_code))))
>     ifn =3D vectorizable_internal_function (cfn, callee, vectype_out,
>                                           vectype_in);
> -----------cut end----------------------
>=20
> Similar for CFN_BUILT_IN_LCEIL under 32-bit target.
> For 64-bit target CFN_BUILT_IN_LCEIL, CFN_BUILT_IN_LLCEIL will go the dir=
ect
> internal fn way, add lceilmn2 expanders works.
>=20
> Not sure whether vectorizable_call should be extended or just leave
> CFN_BUILT_IN_ICEIL/IFLOOR/IRINT/IROUND part in
> ix86_builtin_vectorized_function.

I think this is a known issue (we may even have a bugreport) so I'd
leave handling of those cases in ix86_builtin_vectorized_function.=