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From: "jakub at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug tree-optimization/111519] [13/14 Regression] Wrong code at -O3
 on x86_64-linux-gnu since r13-455-g1fe04c497d
Date: Tue, 10 Oct 2023 08:21:21 +0000
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X-Bugzilla-Component: tree-optimization
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X-Bugzilla-Keywords: wrong-code
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D111519

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Slightly cleaned up testcase:
int a, o;
char b, f, i;
long c;
static signed char d;
static char g;
unsigned *h;
signed char *e =3D &f;
static signed char **j =3D &e;
static long k[2];
unsigned **l =3D &h;
short m;
volatile int z;

__attribute__((noipa)) void
foo (char *p)
{
  (void) p;
}

int
main ()
{
  int p =3D z;
  signed char *n =3D &d;
  *n =3D 0;
  while (c)
    for (; i; i--)
      ;
  for (g =3D 0; g <=3D 1; g++)
    {
      *n =3D **j;
      k[g] =3D 0 !=3D &m;
      *e =3D l && k[0];
    }
  if (p)
    foo (&b);
  for (; o < 4; o++)
    {
      a =3D d;
      if (p)
        foo (&b);
    }
  if (a !=3D 1)
    __builtin_abort ();
}=