From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 4D2183858404; Wed, 31 Aug 2022 14:17:46 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 4D2183858404 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1661955466; bh=v4E5bBFGD8MuMNqnfYSEIFSCDwVUdY+rZSWbi8uIab4=; h=From:To:Subject:Date:In-Reply-To:References:From; b=a1j8is8dOec+0gqsE4GqPNkKKj6D9KDVnN8JebFOm3i6s3NMB5JQQVfBzZmk8Uk4B INuQHQLQvNGit2KkvHobSnttssrBsSA4oRbQ2ZuIV343e+YJS5Ekx5osD7wtfXgFaI qv/owS7L47SXipmef6QidYaEB7gbEir54nAUDmbM= From: "rguenth at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/102631] -Wmaybe-uninitialized cannot see through a series of PHIs Date: Wed, 31 Aug 2022 14:17:45 +0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: tree-optimization X-Bugzilla-Version: 12.0 X-Bugzilla-Keywords: diagnostic X-Bugzilla-Severity: normal X-Bugzilla-Who: rguenth 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: 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=3D102631 --- Comment #5 from Richard Biener --- We run into MAX_CHAIN_LEN exceeded: 6 and when I up that also into cycle detected and then param_uninit_control_dep_attempts exceeded: 1001 so we get a pruned predicate for the DEF. The testcase is too unwieldly to more thoroughly analyze :/=