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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug tree-optimization/105965] [10/11/12 Regression] x86:
 single-element vectors don't have scalar FMA insns used anymore
Date: Tue, 21 Jun 2022 01:52:16 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105965

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|target                      |tree-optimization
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=3D101540

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #2)
> that means we are at least missing a match.pd pattern to simplify
>=20
>   _1 =3D {_10};
>   _11 =3D VIEW_CONVERT_EXPR<float>(_1);

I had an alternative patch which I had submitted in November:
https://gcc.gnu.org/pipermail/gcc-patches/2021-November/585597.html

I never followed up and such. Sorry about that.=