llvm/polly/lib/External/isl/test_inputs/codegen/cloog/reservoir-fusion1.c

for (int c0 = 0; c0 <= M; c0 += 1)
  S1(c0);
for (int c0 = 1; c0 <= M; c0 += 1)
  S2(c0);
for (int c0 = 0; c0 <= M; c0 += 1)
  S3(c0);