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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/106032] [10/11/12/13 Regression] wrong code at
 -Os and above on x86_64-linux-gnu
Date: Sun, 19 Jun 2022 21:08:55 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106032

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|[12/13 Regression] wrong    |[10/11/12/13 Regression]
                   |code at -Os and above on    |wrong code at -Os and above
                   |x86_64-linux-gnu            |on x86_64-linux-gnu
      Known to work|11.3.0                      |6.1.0, 6.4.0
   Target Milestone|13.0                        |10.4
      Known to fail|                            |7.1.0, 8.1.0, 9.1.0

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Here is a testcase which shows this was latent but fails in GCC 7+ (so it is
still a regression):
int a, b, c, *d;
int main() {
  int e =3D 0, f =3D 0;
  int *dd =3D d;
  for (; f < 1; f++)
    if (c < 0)
      e =3D *dd;
  if (a) {
    a =3D b ? 0 : a;
    e && (b =3D a);
  }
  return 0;
}=