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 08825384BC11; Mon, 19 Jul 2021 19:11:11 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 08825384BC11
From: "amacleod at redhat dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/101497] [12 Regression] ice in type, at
 value-range.h:221
Date: Mon, 19 Jul 2021 19:11:10 +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: ice-on-valid-code
X-Bugzilla-Severity: normal
X-Bugzilla-Who: amacleod at redhat dot com
X-Bugzilla-Status: UNCONFIRMED
X-Bugzilla-Resolution: 
X-Bugzilla-Priority: P1
X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org
X-Bugzilla-Target-Milestone: 12.0
X-Bugzilla-Flags: 
X-Bugzilla-Changed-Fields: 
Message-ID: <bug-101497-4-bHTbEWgHZ3@http.gcc.gnu.org/bugzilla/>
In-Reply-To: <bug-101497-4@http.gcc.gnu.org/bugzilla/>
References: <bug-101497-4@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: Mon, 19 Jul 2021 19:11:11 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D101497

--- Comment #5 from Andrew Macleod <amacleod at redhat dot com> ---
  uc_1.0_1 =3D uc_1;
  _2 =3D (int) uc_1.0_1;=20=20=20=20
  _3 =3D 211 - _2;

_3 evaluates as 211 - [-128, 127], or [84, 339]

  _4 =3D _3 > 0;
  _5 =3D (int) _4;
  func_12_uli_6 =3D _5;
  i_4.1_6 =3D i_4;
  _7 =3D i_4.1_6 % 0;

We changed it so that anything mod 0 was undefined.  so _7 is UNDEFINED.
  i_4 =3D _7;
  _11 =3D _3 > 0;

_3 i s[84, 339] meaning _11 always evaluates TRUE.

  _10 =3D _11 ? _7 : 0;

The code for COND_EXPR confirms the types match when it folds. In this case,
the result is UNDEFINED.. undefined has no type, so we need to add a check =
for
that.=