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From: "rsandifo at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/98782] [11 Regression] Bad interaction between IPA frequences and IRA resulting in spills due to changes in BB frequencies Date: Tue, 11 Jan 2022 14:22:17 +0000 [thread overview] Message-ID: <bug-98782-4-OSsFfNbnCP@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-98782-4@http.gcc.gnu.org/bugzilla/> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98782 --- Comment #43 from rsandifo at gcc dot gnu.org <rsandifo at gcc dot gnu.org> --- (In reply to hubicka from comment #42) > I also see a 6.69% regression on x64 with -Ofast -march=native -flto > https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=475.377.0 I can reproduce this with -Ofast -flto -march=znver3 (but not running on a Zen 3). It looks like it's due to g:d3ff7420e94 instead though (sorry Andre!). With a 3-iteration run, I see a 6.2% regression after that revision compared with before it. It would be great if someone more familiar than me with x86 could confirm the bisection though. > and perhaps 3-5% on sphinx > https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=476.280.0 > https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=227.280.0 I'll look at these next. > For non-spec benchmarks spec there is a regression on nbench > https://lnt.opensuse.org/db_default/v4/CPP/graph?plot.0=26.645.1 > There are also large changes in tsvc > https://lnt.opensuse.org/db_default/v4/CPP/latest_runs_report > it may be noise since kernels are tiny, but for example x293 reproduces > both on kabylake and zen by about 80-90% regression that may be easy to > track (the kernel is included in the testsuite). Same regression is not > seen on zen3, so may be an ISA specific or so. To summarise what we discussed on irc (for the record): it looks like the s293 regression is in the noise, like you say. I can't convince GCC to generate different code before and after the IRA patches for that. I haven't looked at the other tsvc tests yet.
prev parent reply other threads:[~2022-01-11 14:22 UTC|newest] Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-01-21 14:31 [Bug rtl-optimization/98782] New: IRA artificially creating spills due to " tnfchris at gcc dot gnu.org 2021-01-21 14:35 ` [Bug rtl-optimization/98782] " jgreenhalgh at gcc dot gnu.org 2021-01-22 10:12 ` fxue at os dot amperecomputing.com 2021-01-29 13:34 ` tnfchris at gcc dot gnu.org 2021-02-05 12:02 ` [Bug rtl-optimization/98782] [11 Regression] Bad interaction between IPA frequences and IRA resulting in spills due to changes in " tnfchris at gcc dot gnu.org 2021-02-23 2:11 ` jiangning.liu at amperecomputing dot com 2021-02-23 12:06 ` rguenth at gcc dot gnu.org 2021-02-26 12:32 ` rguenth at gcc dot gnu.org 2021-11-28 19:07 ` [Bug rtl-optimization/98782] [11/12 " hubicka at gcc dot gnu.org 2021-11-29 1:33 ` jiangning.liu at amperecomputing dot com 2021-11-29 6:59 ` tnfchris at gcc dot gnu.org 2021-12-03 11:44 ` hubicka at gcc dot gnu.org 2021-12-03 11:47 ` hubicka at gcc dot gnu.org 2021-12-07 11:19 ` tnfchris at gcc dot gnu.org 2021-12-07 11:21 ` tnfchris at gcc dot gnu.org 2021-12-07 11:21 ` tnfchris at gcc dot gnu.org 2021-12-07 19:44 ` rsandifo at gcc dot gnu.org 2021-12-07 23:52 ` tnfchris at gcc dot gnu.org 2021-12-08 9:33 ` rsandifo at gcc dot gnu.org 2021-12-08 14:31 ` tnfchris at gcc dot gnu.org 2021-12-08 15:02 ` rsandifo at gcc dot gnu.org 2021-12-09 19:56 ` pthaugen at gcc dot gnu.org 2021-12-09 20:12 ` hubicka at gcc dot gnu.org 2021-12-09 21:27 ` pthaugen at gcc dot gnu.org 2021-12-10 11:36 ` hubicka at gcc dot gnu.org 2021-12-14 14:38 ` tnfchris at gcc dot gnu.org 2021-12-14 14:40 ` hubicka at kam dot mff.cuni.cz 2021-12-14 14:48 ` tnfchris at gcc dot gnu.org 2021-12-14 14:58 ` hubicka at kam dot mff.cuni.cz 2021-12-14 15:07 ` tnfchris at gcc dot gnu.org 2021-12-14 15:08 ` tnfchris at gcc dot gnu.org 2021-12-14 18:16 ` jamborm at gcc dot gnu.org 2021-12-15 12:15 ` tnfchris at gcc dot gnu.org 2021-12-20 18:06 ` rsandifo at gcc dot gnu.org 2021-12-31 17:28 ` rsandifo at gcc dot gnu.org 2022-01-04 22:26 ` pthaugen at gcc dot gnu.org 2022-01-04 22:29 ` pthaugen at gcc dot gnu.org 2022-01-06 14:53 ` rsandifo at gcc dot gnu.org 2022-01-10 1:29 ` crazylht at gmail dot com 2022-01-11 10:14 ` Jan Hubicka 2022-01-10 14:47 ` cvs-commit at gcc dot gnu.org 2022-01-10 14:47 ` cvs-commit at gcc dot gnu.org 2022-01-10 14:47 ` cvs-commit at gcc dot gnu.org 2022-01-10 14:47 ` cvs-commit at gcc dot gnu.org 2022-01-10 14:52 ` [Bug rtl-optimization/98782] [11 " rsandifo at gcc dot gnu.org 2022-01-11 10:14 ` hubicka at kam dot mff.cuni.cz 2022-01-11 14:22 ` rsandifo at gcc dot gnu.org [this message]
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