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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/114970] [14/15 Regression] 32-bit ARM gcc-14.1 new false
 positive -Wunused-value
Date: Tue, 07 May 2024 20:44:06 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114970

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|32-bit ARM gcc-14.1 new     |[14/15 Regression] 32-bit
                   |false positive              |ARM gcc-14.1 new false
                   |-Wunused-value              |positive -Wunused-value
             Target|arm                         |arm*-*-*eabi
   Target Milestone|---                         |14.2

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
This looks related to constructor return this where with ARM EABI construct=
ors
(and deconstructors return this) and we produce:
      <<cleanup_point <<< Unknown tree: expr_stmt
        prefix =3D {._M_len=3D8, ._M_str=3D(const char *) "<prefix>"}, (str=
uct
basic_string_view *) &prefix >>>>>;


Note "this" of &prefix is there.

Let me try to reduce this a little bit.
I might not get to it until week after next though.=