x.mode = invalid
			return
		}

		// check for divisor underflow in complex division (see go.dev/issue/20227)
		if x.mode == constant_ && y.mode == constant_ && isComplex(x.typ) {
			re, im := constant.Real(y.val), constant.Imag(y.val)
			re2, im2 := constant.BinaryOp(re, token.MUL, re), constant.BinaryOp(im, token.MUL, im)
			if constant.Sign(re2) == 0 && constant.Sign(im2) == 0 {

    MATCH(DT_STRING, string);

    // TODO(b/188995810): DenseElementsAttr::get doesn't support complex
    // Attributes being passed, so we bail out for now. This should just be
    //   MATCH(DT_COMPLEX64, scomplex) / 2;
    //   MATCH(DT_COMPLEX128, dcomplex) / 2;
    // when DenseElementsAttr is updated.
    case DT_COMPLEX64:
    case DT_COMPLEX128:
    default:
      return -1;
  }
}

    const T& value, const bool expand_by_row) {
  (*jacobian)(row, col) = JAC_T{value};
}

template <typename T, typename JAC_T>
typename std::enable_if<is_complex<T>::value>::type SetJacobian(
    typename TTypes<JAC_T>::Matrix* jacobian, const int row, const int col,
    const T& value, const bool expand_by_row) {
  (*jacobian)(row, col) = JAC_T{value.real()};
  if (expand_by_row) {