pub unsafe extern "C" fn atg_nll_loss2d_backward(
    out__: *mut *mut C_tensor,
    grad_output_: *mut C_tensor,
    self_: *mut C_tensor,
    target_: *mut C_tensor,
    weight_: *mut C_tensor,
    reduction_: i64,
    ignore_index_: i64,
    total_weight_: *mut C_tensor
)