arg.index(), kAttrArgumentNameAttr);
        auto attribute = op->getAttr(attr_name.getValue());
        if (!attribute) {
          attribute =
              compose_func.getArgAttr(arg.index(), kAttrArgumentDefaultAttr);
        }
        if (!attribute && attr_name.getValue() == "out_type") {
          auto type = op->getResult(0).getType();
          if (mlir::isa<TensorType>(type)) {

      auto attr_name = signature.getArgAttrOfType<StringAttr>(
          operand.index(), kAttrArgumentNameAttr);
      auto attr_value =
          signature.getArgAttr(operand.index(), kAttrArgumentDefaultAttr);
      arg_attrs->push_back(
          rewriter.getNamedAttr(attr_name.getValue(), attr_value));
      continue;
    }

    // The index is valid for the call_op.