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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107247] SLP reduction results fail to reduce
 to a single accumulator
Date: Thu, 13 Oct 2022 14:30:47 +0000
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X-Bugzilla-Component: tree-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107247

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |FIXED
             Status|ASSIGNED                    |RESOLVED

--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> ---
This is now fixed for the cases not requiring permutations.  One could thin=
k of
a three-lane SLP reduction with three four component vectors being reduced
by first "expanding" to four "three component" vectors, summing them and th=
en
extracting from the lower three lanes.  Likewise for a six-lane SLP reducti=
on
which would get a more complex extraction of two-vector, six-lane pairs.

Unless a compelling case comes along I don't consider these important.=