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From: "linkw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/109971] [14 regression] Several powerpc64 vector test cases fail after r14-1242-gf574e2dfae7905
Date: Wed, 31 May 2023 02:50:34 +0000 [thread overview]
Message-ID: <bug-109971-4-S0k3aBc6XX@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-109971-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109971
Kewen Lin <linkw at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords|testsuite-fail |missed-optimization
Assignee|linkw at gcc dot gnu.org |juzhe.zhong at rivai dot ai
--- Comment #8 from Kewen Lin <linkw at gcc dot gnu.org> ---
I did SPEC2017 int/fp evaluation on Power10 at Ofast and an extra explicit
--param=vect-partial-vector-usage=2 (the default is 1 on Power), baseline
r14-1241 vs. new r14-1242, the results showed that it can offer some speedups
for 500.perlbench_r 1.12%, 525.x264_r 1.96%, 544.nab_r 1.91%, 549.fotonik3d_r
1.25%, but it degraded 510.parest_r by 5.01%.
I just tested Juzhe's new proposed fix which makes the loop closing iv SCEV-ed,
it can fix the degradation of 510.parest_r, also the miss optimization on
cunroll (in #c5), the test failures are gone as well. One SPEC2017
re-evaluation with that fix is ongoing, I'd expect it won't degrade anything.
next prev parent reply other threads:[~2023-05-31 2:50 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-25 22:05 [Bug target/109971] New: " seurer at gcc dot gnu.org
2023-05-25 22:32 ` [Bug target/109971] " juzhe.zhong at rivai dot ai
2023-05-25 22:32 ` juzhe.zhong at rivai dot ai
2023-05-26 1:15 ` linkw at gcc dot gnu.org
2023-05-26 1:51 ` juzhe.zhong at rivai dot ai
2023-05-26 5:20 ` linkw at gcc dot gnu.org
2023-05-26 5:28 ` juzhe.zhong at rivai dot ai
2023-05-26 6:22 ` rguenth at gcc dot gnu.org
2023-05-31 2:50 ` linkw at gcc dot gnu.org [this message]
2023-05-31 2:54 ` juzhe.zhong at rivai dot ai
2023-05-31 3:11 ` linkw at gcc dot gnu.org
2023-06-02 11:50 ` cvs-commit at gcc dot gnu.org
2023-07-15 6:01 ` pinskia at gcc dot gnu.org
2023-07-17 2:24 ` linkw at gcc dot gnu.org
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