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From: "anlauf at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug fortran/114012] overloaded unary operator called twice
Date: Tue, 20 Feb 2024 20:32:38 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: fortran
X-Bugzilla-Version: 13.2.1
X-Bugzilla-Keywords: wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D114012

anlauf at gcc dot gnu.org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |wrong-code
     Ever confirmed|0                           |1
   Last reconfirmed|                            |2024-02-20
             Status|UNCONFIRMED                 |NEW

--- Comment #1 from anlauf at gcc dot gnu.org ---
The dump-tree shows for the assignment i =3D -i :

  {
    struct __class__STAR_t val.7;

    val.7._data =3D (void *) neg (&i)._data;
    val.7._vptr =3D (struct __vtype__STAR * {ref-all}) neg (&i)._vptr;
    val.7._len =3D 0;
    i =3D {CLOBBER};
    assign (&i, &val.7);
  }

We should evaluate neg (&i) only once.=