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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/109745] [13/14 Regression] Incorrect code generated with
 -O1 when having a constexpr object modifying a mutable member
Date: Fri, 05 May 2023 15:04:00 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 13.1.0
X-Bugzilla-Keywords: wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109745

Marek Polacek <mpolacek at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
     Ever confirmed|0                           |1
            Summary|Incorrect code generated    |[13/14 Regression]
                   |with -O1 when having a      |Incorrect code generated
                   |constexpr object modifying  |with -O1 when having a
                   |a mutable member            |constexpr object modifying
                   |                            |a mutable member
                 CC|                            |mpolacek at gcc dot gnu.or=
g,
                   |                            |ppalka at gcc dot gnu.org
   Last reconfirmed|                            |2023-05-05
           Priority|P3                          |P2
   Target Milestone|---                         |13.2
             Status|UNCONFIRMED                 |NEW

--- Comment #3 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Looks like it started with r13-2701:

commit 7107ea6fb933f1e928593c7e92edfd64ccf0df63
Author: Patrick Palka <ppalka@redhat.com>
Date:   Fri Sep 16 11:10:43 2022 -0400

    c++: 'mutable' member within constexpr [PR92505]=