!6075 akg json creation bugfix

Merge pull request !6075 from Gaoxiong/master

mindspore/ccsrc/backend/kernel_compiler/akg/akg_kernel_json_generator.cc

@@ -120,7 +120,8 @@ bool AkgKernelJsonGenerator::CreateInputDescJson(const AnfNodePtr &anf_node, con
       input_desc_json[kJsonKeyName] = op_input_name;
       input_desc_json[kJsonKeyTensorName] = "input_" + std::to_string(GetInputTensorIdxInc(anf_node, real_input_index));
       auto input_shape = this->GetInputShape(anf_node, real_input_index);
-      if (GetInputTensorValue(anf_node, real_input_index, &input_desc_json)) {
+      if (anf_node->func_graph() != nullptr && anf_node->func_graph()->has_attr(FUNC_GRAPH_ATTR_GRAPH_KERNEL) &&
+          GetInputTensorValue(anf_node, real_input_index, &input_desc_json)) {
         MS_LOG(DEBUG) << "Take input[" << real_input_index << "] of [" << anf_node->DebugString(2)
                       << "] as const tensor, shape: [" << Vector2Str(input_shape)
                       << "], value: " << input_desc_json[kJsonKeyValue];