From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 963543858C52; Wed, 20 Jul 2022 14:14:12 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 963543858C52 From: "alexander.grund@tu-dresden.de" To: gcc-bugs@gcc.gnu.org Subject: [Bug target/100799] Stackoverflow in optimized code on PPC Date: Wed, 20 Jul 2022 14:14:12 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: target X-Bugzilla-Version: 10.3.0 X-Bugzilla-Keywords: X-Bugzilla-Severity: normal X-Bugzilla-Who: alexander.grund@tu-dresden.de X-Bugzilla-Status: ASSIGNED X-Bugzilla-Resolution: X-Bugzilla-Priority: P3 X-Bugzilla-Assigned-To: jskumari at gcc dot gnu.org X-Bugzilla-Target-Milestone: --- X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: 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 X-BeenThere: gcc-bugs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-bugs mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 20 Jul 2022 14:14:12 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D100799 --- Comment #11 from Alexander Grund --- Some more experiments with GCC 10.3, OpenBLAS 0.3.15 and FlexiBLAS 3.0.4: Baseline: Broken at -O1, working at -Og I got it to break with "-Og -fmove-loop-invariants". Then it worked again by adding "-fstack-protector-all". But that is seeming= ly not advisable: https://developers.redhat.com/blog/2020/05/22/stack-clash-mitigation-in-gcc= -part-3 Hence the current workaround is to use "-O2 -fno-move-loop-invariants"=