fix bug of pynative in back gradient graph mode's transdata inserting when the node is the output of the graph

mindspore/ccsrc/backend/optimizer/ascend/format_type/insert_trans_op.cc

@@ -18,6 +18,7 @@
 #include <memory>
 #include <vector>
 #include "utils/utils.h"
+#include "backend/optimizer/common/helper.h"
 #include "backend/optimizer/ascend/ascend_helper.h"
 #include "backend/session/anf_runtime_algorithm.h"
 #include "utils/ms_context.h"
@@ -30,12 +31,12 @@ const BaseRef InsertTransOp::DefinePattern() const {
   return VectorRef({V, Xs});
 }
 
-bool IsGraphOutput(const AnfNodePtr &node, const std::vector<AnfNodePtr> &outputs) {
+bool IsGraphOutput(const AnfNodePtr &node, const FuncGraphPtr &func_graph) {
+  auto outputs = AnfAlgo::GetAllOutput(func_graph->output(), {prim::kPrimTupleGetItem});
   auto iter = std::find(outputs.begin(), outputs.end(), node);
-  if (iter != outputs.end()) {
+  if (iter != outputs.end() && GetRealNodeNum(func_graph, node) == 1) {
     return true;
   }
-
   return false;
 }
 
@@ -55,7 +56,7 @@ const AnfNodePtr InsertTransOp::Process(const FuncGraphPtr &func_graph, const An
   MS_EXCEPTION_IF_NULL(ms_context);
   if (ms_context->get_param<int>(MS_CTX_EXECUTION_MODE) == kPynativeMode &&
       !ms_context->get_param<bool>(MS_CTX_ENABLE_PYNATIVE_HOOK)) {
-    if (IsGraphOutput(node, AnfAlgo::GetAllOutput(func_graph->output(), {prim::kPrimTupleGetItem}))) {
+    if (IsGraphOutput(node, func_graph)) {
       return new_node;
     }
   }

mindspore/ccsrc/backend/optimizer/common/helper.cc

@@ -485,6 +485,12 @@ void RemoveNopNode(session::KernelGraph *const graph) {
   }
 }
 
+size_t GetRealNodeNum(const FuncGraphPtr &graph, const AnfNodePtr &node) {
+  auto out_list = GetRealNodeUsedList(graph, node);
+  MS_EXCEPTION_IF_NULL(out_list);
+  return out_list->size();
+}
+
 std::shared_ptr<std::vector<std::pair<AnfNodePtr, int>>> GetRealNodeUsedList(const FuncGraphPtr &graph,
                                                                              const AnfNodePtr &node) {
   auto output_node_list = std::make_shared<std::vector<std::pair<AnfNodePtr, int>>>();

mindspore/ccsrc/backend/optimizer/common/helper.h

@@ -172,6 +172,8 @@ bool IsUsedByOthers(const FuncGraphPtr &graph, const AnfNodePtr &node);
 std::shared_ptr<std::vector<std::pair<AnfNodePtr, int>>> GetRealNodeUsedList(const FuncGraphPtr &graph,
                                                                              const AnfNodePtr &node);
 
+size_t GetRealNodeNum(const FuncGraphPtr &graph, const AnfNodePtr &node);
+
 std::shared_ptr<std::vector<std::pair<AnfNodePtr, int>>> GetRealNodeUsedListByOutputIdx(const FuncGraphPtr &graph,
                                                                                         const AnfNodePtr &node,
                                                                                         size_t output_index);