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Subject: [Bug target/105493] [12/13 Regression] x86_64 538.imagick_r 6%
 regressions and 2% 525.x264_r regressions on Alder Lake after
 r12-7319-g90d693bdc9d718
Date: Thu, 09 Jun 2022 07:01:09 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D105493

--- Comment #6 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by hongtao Liu <liuhongt@gcc.gnu.org>:

https://gcc.gnu.org/g:269edf4e5e6ab489730038f7e3495550623179fe

commit r13-1021-g269edf4e5e6ab489730038f7e3495550623179fe
Author: Cui,Lili <lili.cui@intel.com>
Date:   Wed Jun 8 11:25:57 2022 +0800

    Update {skylake,icelake,alderlake}_cost to add a bit preference to vect=
or
store.

    Since the interger vector construction cost has changed, we need to adj=
ust
the
    load and store costs for intel processers.

    With the patch applied
    538.imagic_r:gets ~6% improvement on ADL for multicopy.
    525.x264_r  :gets ~2% improvement on ADL and ICX for multicopy.
    with no measurable changes for other benchmarks.

    gcc/ChangeLog

            PR target/105493
            * config/i386/x86-tune-costs.h (skylake_cost): Raise the gpr lo=
ad
cost
            from 4 to 6 and gpr store cost from 6 to 8. Change SSE loads and
            unaligned loads cost from {6, 6, 6, 10, 20} to {8, 8, 8, 8, 16}.
            (icelake_cost): Ditto.
            (alderlake_cost): Raise the gpr store cost from 6 to 8 and SSE
loads,
            stores and unaligned stores cost from {6, 6, 6, 10, 15} to
            {8, 8, 8, 10, 15}.

    gcc/testsuite/

            PR target/105493
            * gcc.target/i386/pr91446.c: Adjust to expect vectorization
            * gcc.target/i386/pr99881.c: XFAIL.
            * gcc.target/i386/pr105493.c: New.
            * g++.target/i386/pr105638.C: Use other sequence checks
            instead of vpxor, because code generation changed.=