From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id 43D81385AFA4; Fri, 28 Jul 2023 08:12:12 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 43D81385AFA4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1690531932; bh=M6AKfgf+Q9GVq1zYoeJTDP/P42UvtBKVxCs7tR3fRUw=; h=From:To:Subject:Date:In-Reply-To:References:From; b=IWGsCfeZ8GneS/MV+nx6Z1TBXSLMbiCKJLcfaTnOcQGvNhJR/MvXdHMHb8sLfiZ2s Y9rQbirBPfpMGydyQIsevNtLbonKdJs9cYlrGT3dCbwCTo1fmPai0fdzYmIUpPtais dZedpZrtJpIBbwkB7rGMk2GYW8QEgRKrPAUwJhT8= From: "hubicka at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/77689] Missing vectorization lead to huge performance loss Date: Fri, 28 Jul 2023 08:12:04 +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: 6.2.1 X-Bugzilla-Keywords: missed-optimization X-Bugzilla-Severity: enhancement X-Bugzilla-Who: hubicka at gcc dot gnu.org X-Bugzilla-Status: NEW 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: 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=3D77689 Jan Hubicka changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |hubicka at gcc dot gnu.org --- Comment #15 from Jan Hubicka --- loop splitting gives up here because it only handles test i < val or=20 i > val Not i =3D val. It could easily work out that i =3D=3D 0 is same as i < 1 f= rom vlaue range of i.=