From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
	id 718CE38582AB; Wed, 10 May 2023 14:18:10 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 718CE38582AB
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
	s=default; t=1683728290;
	bh=wHcA2FJSDIh36xEoyBEs8vjaSDxfRFVjwE4cqy98A14=;
	h=From:To:Subject:Date:From;
	b=VtkVStgef6VxEtNCqGpJn06qsxf6yC9KXm4/xVQG5iSEDS61mk2TRTE7nDq1Ccu2+
	 LscNeFA9VcrQl+ZYN1b3azV7GGrzwK7avfhpI0Zofp9I9B4JzHmWcrMaYVuQ6U9NfV
	 ev5tPK7DRROMW2VrjjXgfs9sIhbs5u9ZkWSlesyw=
From: "jamborm at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/109796] New: 548.exchange2_r compiled with -O2 -flto
 regressed by 5% on aarch64 between r14-135-gd06e9264b0192c and
 r14-192-g636e2273aec555
Date: Wed, 10 May 2023 14:18:10 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: target
X-Bugzilla-Version: 14.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: jamborm 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
 bug_severity priority component assigned_to reporter blocked target_milestone
 cf_gcchost cf_gcctarget
Message-ID: <bug-109796-4@http.gcc.gnu.org/bugzilla/>
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: <gcc-bugs.sourceware.org>

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109796

            Bug ID: 109796
           Summary: 548.exchange2_r compiled with -O2 -flto regressed by
                    5% on aarch64 between r14-135-gd06e9264b0192c and
                    r14-192-g636e2273aec555
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: jamborm at gcc dot gnu.org
            Blocks: 26163
  Target Milestone: ---
              Host: aarch64-linux
            Target: aarch64-linux

The slowdown can be seen clearly at

https://lnt.opensuse.org/db_default/v4/SPEC/graph?plot.0=3D581.407.0

Fortran at -O2 may not be super important and the slowdown is not huge but =
it
looks very stable so maybe worth a look.  I do not see any similar regressi=
on
on a different architecture or configuration.


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=
)=