llvm::iterator_range<Block::iterator> ops = block->without_terminator();
  if (ops.empty()) {
    return true;
  }

  int num_all_ops = 0;
  int num_part_ops = 0;
  int num_partitions_after = 0;
  int num_partitions_before = 0;
  int num_unscheduled_ops = 0;

  bool scheduled_everything = true;
  // Unscheduled operations and their respective partitions.
  llvm::DenseMap<Operation *, int> unscheduled_ops;