lib/External/isl/test_inputs/codegen/cloog/forwardsub-1-1-2.c

S3(1, 1);
for (int c0 = 2; c0 <= M; c0 += 1) {
  S1(c0, 1);
  for (int c1 = 2; c1 < c0; c1 += 1)
    S2(c0, c1);
  S4(c0, c0);
}