!2696 [bugfix]:Attr of axis of ReduceSum is invalid

Merge pull request !2696 from zyli2020/bug_fix

mindspore/ccsrc/kernel/gpu/arrays/array_reduce_gpu_kernel.h

@@ -94,7 +94,8 @@ class ArrayReduceGpuKernel : public GpuKernel {
     }
     int input_dim_length = SizeToInt(AnfAlgo::GetPrevNodeOutputInferShape(kernel_node, 0).size());
 
-    if (AnfAlgo::GetCNodePrimitive(kernel_node)->GetAttr("axis")->isa<ValueTuple>()) {
+    if (AnfAlgo::GetCNodePrimitive(kernel_node)->GetAttr("axis")->isa<ValueTuple>() ||
+        AnfAlgo::GetCNodePrimitive(kernel_node)->GetAttr("axis")->isa<ValueList>()) {
       auto attr_axis = GetAttr<std::vector<int>>(kernel_node, "axis");
       if (attr_axis.empty()) {
         axis_.push_back(-1);