rhs_reshape_segids.at(std::get<0>(i)) = num_rhs_reshape_segids;
  }
  ++num_rhs_reshape_segids;

  // If LHS requires reshapes.
  if (lhs_rank != num_lhs_reshape_segids) {
    if (succeeded(VerifyShapeOfReshapeOp(lhs_shape))) {
      *lhs = createReshapeOp(*lhs, lhs_shape, lhs_type.getElementType(), loc,
                             rewriter);
    } else {

    if (i == pack_axis) {
      pack_out_shape.push_back(count);
    } else {
      pack_out_shape.push_back(input_type.getDimSize(j));
      j++;
    }
  }

  if (failed(TF::VerifyShapeOfReshapeOp(pack_out_shape))) return failure();

  // Insert the concat op.
  auto concat_out_type =
      RankedTensorType::get(concat_out_shape, input_type.getElementType());