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 924EB3887010; Mon, 22 Jun 2020 03:17:43 +0000 (GMT)
DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 924EB3887010
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org;
 s=default; t=1592795863;
 bh=14x7/oAz/KEUttkAKI0Q60d+H6lx9Txp2+yPdKLO/bo=;
 h=From:To:Subject:Date:From;
 b=UrCxzugZgGfwNMWzTgIxc6AFLBMA2+7o8kk0J4tzUulsrHzdCpvwW6sych/0bbTXo
 o2lYtt616OYcIO6EYO5PShuJS98+15TbXiCIiqjq8v/2vYKr4pqEyPD3g+RTDuL6iv
 LsrlQCHInagYeaYHUu4skQSjcFmAz8QWsfqTNrVE=
From: "johelegp at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/95806] New: Result of call with reference argument to newed
 object is cached during constant evaluation
Date: Mon, 22 Jun 2020 03:17:43 +0000
X-Bugzilla-Reason: CC
X-Bugzilla-Type: new
X-Bugzilla-Watch-Reason: None
X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 10.1.0
X-Bugzilla-Keywords: 
X-Bugzilla-Severity: normal
X-Bugzilla-Who: johelegp at gmail dot com
X-Bugzilla-Status: UNCONFIRMED
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: bug_id short_desc product version bug_status
 bug_severity priority component assigned_to reporter target_milestone
Message-ID: <bug-95806-4@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: <http://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: <http://gcc.gnu.org/mailman/listinfo/gcc-bugs>,
 <mailto:gcc-bugs-request@gcc.gnu.org?subject=subscribe>
X-List-Received-Date: Mon, 22 Jun 2020 03:17:43 -0000

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D95806

            Bug ID: 95806
           Summary: Result of call with reference argument to newed object
                    is cached during constant evaluation
           Product: gcc
           Version: 10.1.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: johelegp at gmail dot com
  Target Milestone: ---

See https://godbolt.org/z/zzM-Qn.
```C++
#include <cassert>

constexpr bool is_zero(int& x) { return x =3D=3D 0; }

constexpr void f()
{
    int& x =3D *new int{0};
    assert(is_zero(x));
    x =3D 1;
    assert(!is_zero(x));
    delete &x;
}

constexpr int x{([]() consteval { f(); }(), 0)};
```=