llvm/polly/lib/External/isl/test_inputs/codegen/cloog/reservoir-pingali4.c

for (int c0 = 1; c0 <= M; c0 += 1)
  for (int c1 = 1; c1 <= M; c1 += 1)
    S1(c0, c1);
for (int c0 = 1; c0 <= M; c0 += 1)
  for (int c1 = 1; c1 <= M; c1 += 1)
    S2(c0, c1);