From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id D632238768A7; Thu, 30 Mar 2023 10:25:25 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D632238768A7 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1680171925; bh=u7KekJ8s0teZjdZG28Pw94KQkDOQAltETQOnQZERAxE=; h=From:To:Subject:Date:In-Reply-To:References:From; b=vb4/lBnHpDFGZr5sx/AEE/CFB0OroWPCYIbg+YP9Jh7Px1CEsEaOmDa39v4/ThTYy +xFvYEsbGR6caDO+sjPm8Xywnw7rnHVQXNocE157BbSza0rBAUeuOubrtyLSq/jTuG sdyx5PnAQokBH6Y/eEtNbEZqhWGm2fGs36HwCIcM= From: "jakub at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug ipa/109341] [12/13 Regression] ICE in merge, at ipa-modref-tree.cc:176 since r12-3142-g5c85f29537662f Date: Thu, 30 Mar 2023 10:25:24 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: ipa X-Bugzilla-Version: 13.0 X-Bugzilla-Keywords: ice-checking, ice-on-valid-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jakub at gcc dot gnu.org X-Bugzilla-Status: NEW X-Bugzilla-Resolution: X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 12.3 X-Bugzilla-Flags: X-Bugzilla-Changed-Fields: cc 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=3D109341 Jakub Jelinek changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |jakub at gcc dot gnu.org --- Comment #3 from Jakub Jelinek --- The warning is because we unswitch the loop, so we have a separate loop for= h !=3D 0 and separate loop for h =3D=3D 0. And the latter obviously invokes = undefined behavior (though I get it for iteration 3 rather than 7).=