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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/103006] [9/10/11/12 Regression] wrong code at
 -O2 (only) on x86_64-linux-gnu
Date: Sat, 30 Oct 2021 22:12:18 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D103006

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

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2021-10-30
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Confirmed, here is one which is broken at -O1 and -O2 but ok at -O3:

__attribute__((noipa)) void ff(void){}
int a, *b, c, e, f;
__attribute__((always_inline))
static inline void g() {
  int *d[7];
  d[6] =3D b =3D (int *)d;
  ff();
}
__attribute__((noinline))
int i() {
  for (c =3D 0; c < 2; c++) {
    long h[6][2];
    for (e =3D 0; e < 6; e++)
      for (f =3D 0; f < 2; f++)
        h[e][f] =3D 1;
    if (c) {
      g();
      return h[3][0];
    }
  }
  return 0;
}
int main() {
  if (i() !=3D 1)
    __builtin_abort ();
  return 0;
}=