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From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug target/109130] New: 464.h264ref regressed by 6.5% on a Neoverse-N1 CPU with PGO, LTO, -Ofast and -march=native Date: Tue, 14 Mar 2023 17:03:42 +0000 [thread overview] Message-ID: <bug-109130-4@http.gcc.gnu.org/bugzilla/> (raw) https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109130 Bug ID: 109130 Summary: 464.h264ref regressed by 6.5% on a Neoverse-N1 CPU with PGO, LTO, -Ofast and -march=native Product: gcc Version: 13.0 Status: UNCONFIRMED Severity: normal Priority: P3 Component: target Assignee: unassigned at gcc dot gnu.org Reporter: jamborm at gcc dot gnu.org CC: tnfchris at gcc dot gnu.org Blocks: 26163 Target Milestone: --- Host: aarch64-suse-linux Target: aarch64-suse-linux LNT shows what looks like a clear recent 6.5% regression on the 464.h264ref benchmark from SPEC 2006 CPU suite when compiled with PGO, LTO, -Ofast and -march=native on a Neoverse-N1 CPU: https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=586.220.0 In the same time period, I cannot (immediately) see any similar regressions on any other CPU (all others that we monitor are x86_64) or option combination. Unfortunately I don't have the time and resources to further investigate, but the commit range bad177e848787258..2fc55f51f9953b45 includes 8e26ac4749c (AArch64: Fix codegen regressions around tbz), among other things. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26163 [Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95)
next reply other threads:[~2023-03-14 17:03 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-03-14 17:03 jamborm at gcc dot gnu.org [this message] 2023-03-15 12:56 ` [Bug target/109130] " tnfchris at gcc dot gnu.org 2023-03-20 16:49 ` [Bug target/109130] [13 Regression] " pinskia at gcc dot gnu.org 2023-04-26 6:58 ` [Bug target/109130] [13/14 " rguenth at gcc dot gnu.org 2023-07-27 9:25 ` rguenth at gcc dot gnu.org 2024-03-08 15:38 ` law at gcc dot gnu.org 2024-05-21 9:14 ` [Bug target/109130] [13/14/15 " jakub at gcc dot gnu.org
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