}
};

// Checks if a block wraps a single operation and the single operation results
// are perfectly forwarded to the block's terminator.
bool BlockWrapsSingleOp(Block* block) {
  auto body = block->without_terminator();
  if (!hasSingleElement(body)) return false;

  Operation& wrapped_op = *body.begin();
  Operation* terminator = block->getTerminator();