From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 548763858D32; Tue, 4 Jul 2023 22:40:13 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 548763858D32 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1688510413; bh=4izJwwpD9mo4sJ+7aWFJcDWKap0UoOPVMn+SlAXy1Wk=; h=From:To:Subject:Date:In-Reply-To:References:From; b=e+yWI9RgEVmD5C/pv4C577xbEXRMvO8mgBSiqGNqhGIxFp1LsThlsGesPBK1FNefc fLqN0CLD0yvJVIYjS2Tjj7sGoEjLs1nCCh77ySy+RJdfdeIQAktqs41JtCbIoaR65O LORgb7ymkiTbaGXba1Py+n6sKMfEJeBADZV/dkec= From: "slyfox at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug middle-end/110515] [12/13/14 Regression] llvm-15.0.7 possibly invalid code on -O3 Date: Tue, 04 Jul 2023 22:40:12 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: middle-end X-Bugzilla-Version: 14.0 X-Bugzilla-Keywords: alias, needs-bisection, wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: slyfox 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: 12.4 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 List-Id: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110515 --- Comment #7 from Sergei Trofimovich --- (In reply to Richard Biener from comment #6) > Turning off PRE also allows it to pass but I guess it's the same as with = SRA. > -fno-strict-aliasing also helps, -fno-ipa-modref doesn't. I suspect > bisection > isn't going to help much, but maybe it points to a small set of changes on > the testcase itself. Bisect landed on the r12-4790-g4b3a325f07aceb : $ git bisect bad 4b3a325f07acebf47e82de227ce1d5ba62f5bcae is the first bad commit commit 4b3a325f07acebf47e82de227ce1d5ba62f5bcae Author: Aldy Hernandez Date: Thu Oct 28 15:35:21 2021 +0200 Remove VRP threader passes in exchange for better threading pre-VRP.=