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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/109892] SLP failure with explicit fma
Date: Wed, 17 May 2023 15:31:06 +0000
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X-Bugzilla-Component: tree-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109892

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2023-05-17
             Status|UNCONFIRMED                 |NEW
           Severity|normal                      |enhancement

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed.

I Notice that clang/LLVM does not vectorize the __builtin_fma either.

I also noticed for aarch64, GCC does not use faddp for the final reduction =
(but
I saw there was a patch submitted for that in 2021 but had not been updated=
 for
the comments on it ...).=