Describe the current behavior / 问题描述 (Mandatory / 必填)

torch版本的devoxelize算子在转换到mindspore后出现 反向传播函数未定义问题。

Environment / 环境信息 (Mandatory / 必填)

• Hardware Environment(Ascend/GPU/CPU) / 硬件环境:

Please delete the backend not involved / 请删除不涉及的后端:
/device ascend/GPU/CPU/kirin/等其他芯片

• Software Environment / 软件环境 (Mandatory / 必填):
  -- MindSpore version (e.g., 1.7.0.Bxxx) : 2.2.14
  -- Python version (e.g., Python 3.7.5) : 3.9
  -- OS platform and distribution (e.g., Linux Ubuntu 16.04): Ubuntu 18.04
  -- GCC/Compiler version (if compiled from source): 7.5.0
  -- PyTorch: 1.8.1

• Excute Mode / 执行模式 (Mandatory / 必填)(PyNative/Graph):

Please delete the mode not involved / 请删除不涉及的模式:
/mode pynative
/mode graph

Related testcase / 关联用例 (Mandatory / 必填)

详细步骤请参考https://gitee.com/stf216/spvnas_-ms 测试用例

Steps to reproduce the issue / 重现步骤 (Mandatory / 必填)

1. 编译六个cuda算子
2. 执行测试语句 python3 train.py configs/semantic_kitti/spvcnn/cr0p64.yaml

Describe the expected behavior / 预期结果 (Mandatory / 必填)

能够正常运行不报错

Related log / screenshot / 日志 / 截图 (Mandatory / 必填)

请查看测试用例 https://gitee.com/stf216/spvnas_-ms

Special notes for this issue/备注 (Optional / 选填)