[Bug rtl-optimization/68328] [4.9/5/6 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu

["ktkachov at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68328

--- Comment #8 from ktkachov at gcc dot gnu.org ---
The above testcase should be adjusted a bit for targets that have different
char signedness than x86:
int a, b, c = 1, d = 1, e;

__attribute__((noinline, noclone)) int
foo (void)
{
  asm volatile ("" : : : "memory");
  return 4195552;
}

__attribute__((noinline, noclone)) void
bar (int x, int y)
{
  asm volatile ("" : : "g" (x), "g" (y) : "memory");
  if (y == 0)
    __builtin_abort ();
}

int
baz (int x)
{
  char g, h;
  int i, j;

  foo ();
  for (;;)
    {
      if (c)
        h = d;
      g = h < x ? h : 0;
      i = (signed char) ((unsigned char)(g - 120) ^ 1);
      j = i > 97;
      if (a - j)
        bar (0x123456, 0);
      if (!b)
        return e;
    }
}

int
main ()
{
  baz (2);
  return 0;
}