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From: "cvs-commit at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/107413] Perf loss ~14% on 519.lbm_r SPEC
 cpu2017 benchmark with r8-7132-gb5b33e113434be
Date: Thu, 24 Nov 2022 13:30:43 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D107413

--- Comment #12 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Wilco Dijkstra <wilco@gcc.gnu.org>:

https://gcc.gnu.org/g:0c1b0a23f1fe7db6a2e391b7cb78cff900377772

commit r13-4291-g0c1b0a23f1fe7db6a2e391b7cb78cff900377772
Author: Wilco Dijkstra <wilco.dijkstra@arm.com>
Date:   Wed Nov 23 17:27:19 2022 +0000

    AArch64: Add fma_reassoc_width [PR107413]

    Add a reassocation width for FMA in per-CPU tuning structures. Keep
    the existing setting of 1 for cores with 2 FMA pipes (this disables
    reassociation), and use 4 for cores with 4 FMA pipes.  This improves
    SPECFP2017 on Neoverse V1 by ~1.5%.

    gcc/
            PR tree-optimization/107413
            * config/aarch64/aarch64.cc (struct tune_params): Add
            fma_reassoc_width to all CPU tuning structures.
            (aarch64_reassociation_width): Use fma_reassoc_width.
            * config/aarch64/aarch64-protos.h (struct tune_params): Add
            fma_reassoc_width.=