From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 48) id CB0713857023; Thu, 1 Jul 2021 03:42:34 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org CB0713857023 From: "guojiufu at gcc dot gnu.org" To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/101145] niter analysis fails for until-wrap condition Date: Thu, 01 Jul 2021 03:42:34 +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: missed-optimization X-Bugzilla-Severity: normal X-Bugzilla-Who: guojiufu 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: 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: Thu, 01 Jul 2021 03:42:34 -0000 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101145 --- Comment #8 from Jiu Fu Guo --- Reference the code of adjust_cond_for_loop_until_wrap, add code for non-con= st cases. Code was added in adjust_cond_for_loop_until_wrap at beginning, to = set may_be_zero and no_overflow, the code was moved to number_of_iterations_lt = at last. The patch was submitted as:=20 https://gcc.gnu.org/pipermail/gcc-patches/2021-July/574110.html=