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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug middle-end/103641] [11/12 regression] Severe compile time
 regression in SLP vectorize step
Date: Fri, 04 Feb 2022 07:26:21 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103641

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |jakub at gcc dot gnu.org,
                   |                            |kyrylo.tkachov at arm dot =
com

--- Comment #26 from Richard Biener <rguenth at gcc dot gnu.org> ---
I'm testing a patch along comment#25 - CCing Kyrylo who seems to have autho=
red
the code.  It doesn't address the issue noted by Roger that we use MAX_COST
but as said in the comment it improves compile-time quite a bit and it shou=
ld
also produce better sequences since we base the cost on the vector mode that
will be used rather than the scalar mode (assuming the vector ops are coste=
d in
a non-random way - which is likely where this will fail).=