!2270 fix code review

Merge pull request !2270 from lianliguang/master

mindspore/ccsrc/pre_activate/ascend/format_type/deal_ref_trans_and_cast.cc

@@ -31,8 +31,9 @@ session::KernelWithIndex FindRefOriginNode(const AnfNodePtr &node) {
   session::KernelWithIndex kernel_with_index = AnfAlgo::VisitKernel(node, 0);
   AnfNodePtr cur_node = kernel_with_index.first;
   size_t cur_out_index = kernel_with_index.second;
+  MS_EXCEPTION_IF_NULL(cur_node);
   if (cur_node->isa<CNode>()) {
-    auto cnode = node->cast<CNodePtr>();
+    auto cnode = cur_node->cast<CNodePtr>();
     MS_EXCEPTION_IF_NULL(cnode);
     std::string op_name = AnfAlgo::GetCNodeName(cnode);
     auto op_info = mindspore::kernel::OpLib::FindOp(op_name, kernel::kTBE);
@@ -88,7 +89,7 @@ AnfNodePtr AddAdditionalToRefOutput(const FuncGraphPtr &func_graph, const CNodeP
                                     size_t input_index, const AnfNodePtr &get_item) {
   AnfNodePtr final_node = (get_item == nullptr ? cnode : get_item);
   size_t final_index = output_index;
-  AnfNodePtr input_node = cnode->input(input_index + 1);
+  AnfNodePtr input_node = AnfAlgo::GetInputNode(cnode, input_index);
   session::KernelWithIndex origin_pair;
   origin_pair = FindRefOriginNode(input_node);
   MS_EXCEPTION_IF_NULL(origin_pair.first);
@@ -133,6 +134,7 @@ AnfNodePtr AddAdditionalToRefOutput(const FuncGraphPtr &func_graph, const CNodeP
 }
 AnfNodePtr DealRefForMultipleOutput(const FuncGraphPtr &func_graph, const CNodePtr &cnode,
                                     const std::shared_ptr<kernel::OpInfo> &op_info) {
+  MS_EXCEPTION_IF_NULL(op_info);
   auto ref_infos = op_info->ref_infos();
   std::vector<AnfNodePtr> make_tuple_inputs;
   AbstractBasePtrList abstract_list;
@@ -144,9 +146,11 @@ AnfNodePtr DealRefForMultipleOutput(const FuncGraphPtr &func_graph, const CNodeP
       auto input_index = ref_infos.at(output_index);
       final_node = AddAdditionalToRefOutput(func_graph, cnode, output_index, input_index, final_node);
     }
+    MS_EXCEPTION_IF_NULL(final_node);
     abstract_list.push_back(final_node->abstract());
     make_tuple_inputs.push_back(final_node);
   }
+  MS_EXCEPTION_IF_NULL(func_graph);
   AnfNodePtr make_tuple = func_graph->NewCNode(make_tuple_inputs);
   MS_EXCEPTION_IF_NULL(make_tuple);
   make_tuple->set_abstract(std::make_shared<abstract::AbstractTuple>(abstract_list));
@@ -155,6 +159,8 @@ AnfNodePtr DealRefForMultipleOutput(const FuncGraphPtr &func_graph, const CNodeP
 
 AnfNodePtr DealRefSigleOutput(const FuncGraphPtr &func_graph, const CNodePtr &cnode,
                               const std::shared_ptr<kernel::OpInfo> &op_info) {
+  MS_EXCEPTION_IF_NULL(cnode);
+  MS_EXCEPTION_IF_NULL(op_info);
   auto ref_infos = op_info->ref_infos();
   for (const auto &ref_info : ref_infos) {
     if (ref_info.second > cnode->inputs().size()) {
@@ -206,7 +212,9 @@ const AnfNodePtr DealRefTransAndCast::Process(const FuncGraphPtr &graph, const A
     return nullptr;
   }
   if (op_info->is_ref()) {
-    if (!cnode->Type()->isa<Tuple>()) {
+    auto type = cnode->Type();
+    MS_EXCEPTION_IF_NULL(type);
+    if (!type->isa<Tuple>()) {
       return DealRefSigleOutput(graph, cnode, op_info);
     } else {
       return DealRefForMultipleOutput(graph, cnode, op_info);