From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id A56B53858D35; Fri, 8 Mar 2024 09:33:14 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org A56B53858D35 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1709890394; bh=JNM8KihRW/eiQt3D0fItKXiSh9hdmlX66pbYXof/I24=; h=From:To:Subject:Date:From; b=DHgiE8kFoUFwzpOX5l+evalUs3/zIb+tqaT+AKOMd4MiqLJyQgkL+3ShDC07dO3PL S1/XfMUgvKxHZJhH2smy6IpAcCrOtMc7/kbonWCrxPsyqDQnSmoYHXIYc8pnnatHGT pY4GRPghPIbQ/kInXxVh72Qg+qe7q9LWXUK2Miyg= From: "pheeck at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/114281] New: [14 Regression] Multiple 2-10% exec time regressions of 465.tonto since r14-9193-ga0b1798042d033 Date: Fri, 08 Mar 2024 09:33:13 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: new X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 14.0 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: pheeck at gcc dot gnu.org X-Bugzilla-Status: UNCONFIRMED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: bug_id short_desc product version bug_status keywords bug_severity priority component assigned_to reporter blocked target_milestone cf_gcchost cf_gcctarget Message-ID: Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated MIME-Version: 1.0 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114281 Bug ID: 114281 Summary: [14 Regression] Multiple 2-10% exec time regressions of 465.tonto since r14-9193-ga0b1798042d033 Product: gcc Version: 14.0 Status: UNCONFIRMED Keywords: missed-optimization Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: pheeck at gcc dot gnu.org Blocks: 26163 Target Milestone: --- Host: aarch64-gnu-linux, x86_64-linux Target: aarch64-gnu-linux, x86_64-linux Our LNT instance has detected that runtime of benchmark 465.tonto from the = SPEC 2006 suite regressed on all of our machines (aarch64 ampere altra, intel skylake, amd zen{2,3,4}) on most configurations by 2-10%. One example: Zen4 -Ofast -flto -march=3Dnative (regressed by 10%) https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D992.230.0 I've bisected the example configuration to r14-9193-ga0b1798042d033 (Richard Biener: tree-optimization/114074 - CHREC multiplication and undefined overflow). There have been two other SPEC benchmarks regressions reported that also got bisected to this commit -- pr114269, pr114238. I assume that all of these h= ave the same cause. Referenced Bugs: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D26163 [Bug 26163] [meta-bug] missed optimization in SPEC (2k17, 2k and 2k6 and 95= )=