1static int ap(int i);
2static void testit(void){
3  int ir[4] = {0,1,2,3};
4  int ix,n,m;
5  n=1; m=3;
6  for (ix=1;ix<=4;ix++) {
7    if (n == 1) m = 4;
8    else        m = n-1;
9    ap(ir[n-1]);
10    n = m;
11  }
12}
13
14static int t = 0;
15static int a[4];
16
17static int ap(int i){
18  if (t > 3)
19    abort();
20  a[t++] = i;
21  return 1;
22}
23
24int main(void)
25{
26  testit();
27  if (a[0] != 0)
28    abort();
29  if (a[1] != 3)
30    abort();
31  if (a[2] != 2)
32    abort();
33  if (a[3] != 1)
34    abort();
35  exit(0);
36}
37