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From: "tnfchris at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/110625] [14 Regression][AArch64] Vect: SLP fails to
 vectorize a loop as the reduction_latency calculated by new costs is too
 large
Date: Fri, 08 Dec 2023 10:20:56 +0000
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X-Bugzilla-Keywords: missed-optimization
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110625

Tamar Christina <tnfchris at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[AArch64] Vect: SLP fails   |[14 Regression][AArch64]
                   |to vectorize a loop as the  |Vect: SLP fails to
                   |reduction_latency           |vectorize a loop as the
                   |calculated by new costs is  |reduction_latency
                   |too large                   |calculated by new costs is
                   |                            |too large
           Priority|P3                          |P1

--- Comment #21 from Tamar Christina <tnfchris at gcc dot gnu.org> ---
It looks like this is a GCC 14 regression, GCC 13 is 16% faster.=