From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugs-return-472694-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org>
Received: (qmail 7015 invoked by alias); 10 Jan 2015 16:49:33 -0000
Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm
Precedence: bulk
List-Id: <gcc-bugs.gcc.gnu.org>
List-Archive: <http://gcc.gnu.org/ml/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-help@gcc.gnu.org>
Sender: gcc-bugs-owner@gcc.gnu.org
Received: (qmail 6979 invoked by uid 48); 10 Jan 2015 16:49:28 -0000
From: "Joost.VandeVondele at mat dot ethz.ch" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/64491] [5 Regression] incorrect warning: loop exit may only be reached after undefined behavior
Date: Sat, 10 Jan 2015 16:49:00 -0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: changed
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 5.0
X-Bugzilla-Keywords:
X-Bugzilla-Severity: minor
X-Bugzilla-Who: Joost.VandeVondele at mat dot ethz.ch
X-Bugzilla-Status: NEW
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: bug_status cf_reconfirmed_on cc short_desc cf_known_to_fail
Message-ID: <bug-64491-4-WG0PvGodWh@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-64491-4@http.gcc.gnu.org/bugzilla/>
References: <bug-64491-4@http.gcc.gnu.org/bugzilla/>
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: 7bit
X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/
Auto-Submitted: auto-generated
MIME-Version: 1.0
X-SW-Source: 2015-01/txt/msg00688.txt.bz2

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64491

Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |NEW
   Last reconfirmed|2015-01-04 00:00:00         |2015-1-10
                 CC|                            |Joost.VandeVondele at mat dot ethz
                   |                            |.ch
            Summary|warning: loop exit may only |[5 Regression] incorrect
                   |be reached after undefined  |warning: loop exit may only
                   |behavior                    |be reached after undefined
                   |                            |behavior
      Known to fail|                            |5.0

--- Comment #4 from Joost VandeVondele <Joost.VandeVondele at mat dot ethz.ch> ---
The incorrect warning is confirmed. 

I wonder if this incorrect analysis could lead to wrong code generation.