1[numthreads(1, 1, 1)]
2void f() {
3  int i = 0;
4  switch(i) {
5    case 0: {
6      /* fallthrough */
7      {
8        break;
9      }
10    }
11    default: {
12      break;
13    }
14  }
15  return;
16}
17