From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id C46B23858D33; Thu, 9 Mar 2023 07:05:11 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org C46B23858D33 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1678345511; bh=3CyX/jNbcB80IsLJpEJhhtPC+SVcce6FeEMODiQ40dI=; h=From:To:Subject:Date:From; b=xgRf1JPsGcHqn58o38IfvShBaTj52Ajwu3vCQxVxsdOTZge7NxanHXuDl8c7O0dwb NLXkwWpwEYMECFOjbtzLNkl/Fhe9lsiiKpqFZaEkTylR7KhbJBpBT3+EYSQZ7mL2Xi JtNKP++fZgNJJ0dtbr/dYAbKWH/MzKywfjTDo66Q= From: "tkoenig at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/109075] New: [13 Regression] rnflow hangs at -O3 Date: Thu, 09 Mar 2023 07:05:11 +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: unknown X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: tkoenig 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 target_milestone 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=3D109075 Bug ID: 109075 Summary: [13 Regression] rnflow hangs at -O3 Product: gcc Version: unknown Status: UNCONFIRMED Severity: normal Priority: P3 Component: tree-optimization Assignee: unassigned at gcc dot gnu.org Reporter: tkoenig at gcc dot gnu.org Target Milestone: --- rnflow from the pb11 Polyhedron benchmark hangs at -O3 with recent trunk, gcc-Version 13.0.1 20230308 (experimental) [master revision e87559d202d:f4e6da6e8ac:36ec54aac7da134441c83248e14825381b8d6f17] (GCC) Compiling with -O3 -g, running under gdb and interrupting the program=20 sometime after (gdb) r rnflow.in=20 Starting program: /tmp/a.out rnflow.in 0: 0: 0.000 -> Read sequence 0: 0: 0.213 -> extract extrema 0: 0: 0.215 -> Generate raw transitions counts 0: 0: 0.221 -> Compute Markov matrix 0: 0: 0.221 -> Calculate theoretical rainflow 0: 0: 7.487 -> Simulate random markov sequences ^C Program received signal SIGINT, Interrupt. 0x0000000000402149 in minlst (ipos2=3D, ipos1=3D) at rnflow.f90:3698 3698 if (xxtrt (ipos) < xxtrt (minlst)) then (gdb) l 3693 ! 3694 ! .. dernier minimum de xxtrt entre ipos1 et ipos2 3695 ! 3696 minlst =3D ipos2 3697 do ipos =3D ipos2 - 1, ipos1, -1 3698 if (xxtrt (ipos) < xxtrt (minlst)) then 3699 minlst =3D ipos 3700 endif 3701 enddo 3702 end function minlst where it goes into an endless loop. This happens both on x86_64 and on POWER.=