extern int v;
extern int bar2 (void);
extern int bar4 (void);

int v;

static int
foo2 (int *x, int *y)
{
  int mask = 0;
  if (v & 1)
    {
      mask = 1;
      *x = v;
    }
  if (v & 2)
    {
      mask |= 2;
      *y = v;
    }
  return mask;
}

int
bar2 (void)
{
  int sum = 0;
  int x, y;
  int mask = foo2 (&x, &y);
  if (mask & 1)
    sum += x;
  if (mask & 2)
    sum += y;
  return sum;
}

static int
foo4 (int *x, int *y, int *w, int *h)
{
  int mask = 0;
  if (v & 1)
    {
      mask = 1;
      *x = v;
    }
  if (v & 2)
    {
      mask |= 2;
      *y = v;
    }
  if (v & 4)
    {
      mask |= 4;
      *w = v;
    }
  if (v & 8)
    {
      mask |= 8;
      *h = v;
    }
  return mask;
}

int
bar4 (void)
{
  int sum = 0;
  int x, y, w, h;
  int mask = foo4 (&x, &y, &w, &h);
  if (mask & 1)
    sum += x;
  if (mask & 2)
    sum += y;
  if (mask & 4)
    sum += w;
  if (mask & 8)
    sum += h;
  return sum;
}