From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <gcc-bugzilla@gcc.gnu.org>
Received: by sourceware.org (Postfix, from userid 48)
 id 61AF9386EC62; Wed,  7 Oct 2020 18:07:54 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 61AF9386EC62
From: "amacleod at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/97315] [11 Regression] ICE in choose_value,
 at gimple-ssa-evrp.c:282 since
 r11-3690-gebc77ce3a4c70730b4e38d68f88693eadbdc8712
Date: Wed, 07 Oct 2020 18:07:54 +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: 10.0
X-Bugzilla-Keywords: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: amacleod at redhat dot com
X-Bugzilla-Status: NEW
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P1
X-Bugzilla-Assigned-To: amacleod at redhat dot com
X-Bugzilla-Target-Milestone: 11.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: assigned_to attachments.created
Message-ID: <bug-97315-4-YGoFY2eDqN@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-97315-4@http.gcc.gnu.org/bugzilla/>
References: <bug-97315-4@http.gcc.gnu.org/bugzilla/>
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 <gcc-bugs.gcc.gnu.org>
List-Unsubscribe: <https://gcc.gnu.org/mailman/options/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=unsubscribe>
List-Archive: <https://gcc.gnu.org/pipermail/gcc-bugs/>
List-Post: <mailto:gcc-bugs@gcc.gnu.org>
List-Help: <mailto:gcc-bugs-request@gcc.gnu.org?subject=help>
List-Subscribe: <https://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Wed, 07 Oct 2020 18:07:54 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97315

Andrew Macleod <amacleod at redhat dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |amacleod at redhat =
dot com

--- Comment #10 from Andrew Macleod <amacleod at redhat dot com> ---
Created attachment 49324
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=3D49324&action=3Dedit
Patch to fix the problem

Running the following patch thru bootstrap and testing.=20=20

a) removes the trap and instead annotates the listing.
b) Changes any non-overflow calculation in which both bounds are
overflow/underflow to be undefined.

Which seems to resolve everything I am seeing in this PR.=