!7140 UnsortedSegmentSum null check

Merge pull request !7140 from chenweifeng/unsorted-null-checkout

mindspore/ccsrc/backend/kernel_compiler/gpu/arrays/unsorted_segment_sum_gpu_kernel.h

@@ -27,7 +27,8 @@ namespace kernel {
 template <typename T, typename S>
 class UnsortedSegmentSumGpuKernel : public GpuKernel {
  public:
-  UnsortedSegmentSumGpuKernel() : input_dim0_(1), input_dim1_(1), output_dim0_(1), output_dim1_(1) {}
+  UnsortedSegmentSumGpuKernel()
+      : input_dim0_(1), input_dim1_(1), output_dim0_(1), output_dim1_(1), is_null_input_(false) {}
   ~UnsortedSegmentSumGpuKernel() override = default;
 
   const std::vector<size_t> &GetInputSizeList() const override { return input_size_list_; }
@@ -36,6 +37,9 @@ class UnsortedSegmentSumGpuKernel : public GpuKernel {
 
   bool Launch(const std::vector<AddressPtr> &inputs, const std::vector<AddressPtr> &,
               const std::vector<AddressPtr> &outputs, void *stream_ptr) override {
+    if (is_null_input_) {
+      return true;
+    }
     T *input_addr = GetDeviceAddress<T>(inputs, 0);
     S *indices_addr = GetDeviceAddress<S>(inputs, 1);
     T *output_addr = GetDeviceAddress<T>(outputs, 0);
@@ -50,6 +54,12 @@ class UnsortedSegmentSumGpuKernel : public GpuKernel {
 
   bool Init(const CNodePtr &kernel_node) override {
     auto input_shapes = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0);
+    is_null_input_ = CHECK_NULL_INPUT(input_shapes);
+    if (is_null_input_) {
+      MS_LOG(WARNING) << "UnsortedSegmentSum input is null";
+      InitSizeLists();
+      return true;
+    }
     auto ids_shapes = AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 1);
     auto output_shapes = AnfAlgo::GetOutputInferShape(kernel_node, 0);
 
@@ -83,6 +93,7 @@ class UnsortedSegmentSumGpuKernel : public GpuKernel {
   size_t input_dim1_;
   size_t output_dim0_;
   size_t output_dim1_;
+  bool is_null_input_;
 
   std::vector<size_t> input_size_list_;
   std::vector<size_t> output_size_list_;