// taking the most specialized. This combines `10x?x?` and `?x?x8` into
  // `10x?x8`.
  if (!lhs_shape_type.hasRank()) {
    if (rhs_shape_type.hasRank()) {
      shape.append(rhs_shape_type.getShape().begin(),
                   rhs_shape_type.getShape().end());
      refined_shape = true;
    }
  } else if (rhs_shape_type.hasRank()) {
    for (auto shape_elts : llvm::enumerate(

  std::vector<int32_t> shape;
  if (tensor_type.hasRank()) {
    llvm::ArrayRef<int64_t> shape_ref = tensor_type.getShape();
    shape = std::vector<int32_t>(shape_ref.begin(), shape_ref.end());
  }

  variant_params.push_back(
      tflite::CreateVariantSubType(builder_, builder_.CreateVector(shape),
                                   tflite_element_type, tensor_type.hasRank()));
  return variant_params;
}