diff --git a/mindspore/ccsrc/session/ascend_control_parser.cc b/mindspore/ccsrc/session/ascend_control_parser.cc
index 416ea49e63..331e0cd1d0 100644
--- a/mindspore/ccsrc/session/ascend_control_parser.cc
+++ b/mindspore/ccsrc/session/ascend_control_parser.cc
@@ -19,6 +19,17 @@
 #include "session/ascend_control_parser.h"
 #include "session/anf_runtime_algorithm.h"
 
+static constexpr size_t kCNodePrim = 0;
+static constexpr size_t kCNodeCallArg = 1;
+static constexpr size_t kCNodeSwitchCond = 1;
+static constexpr size_t kCNodeSwitchTrue = 2;
+static constexpr size_t kCNodeSwitchFalse = 3;
+static constexpr size_t kCNodeSwitchLength = 4;
+static constexpr size_t kCNodePartialLength = 2;
+static constexpr size_t kCNodePartialFunc = 1;
+static constexpr size_t kCNodeSwitchLayerBranch = 2;
+static constexpr size_t kCNodeSwitchLayerLength = 3;
+
 namespace mindspore {
 namespace session {
 
@@ -61,7 +72,7 @@ void AscendControlParser::LinkGraph(NotNull<KernelGraphPtr> kg) {
   ChildGraphDataAssign(graph_id_map);
 }
 
-CNodePtr AscendControlParser::GetNextRealKernel(std::vector<CNodePtr> list, size_t start) {
+CNodePtr AscendControlParser::GetNextRealKernel(const std::vector<CNodePtr> &list, size_t start) {
   for (size_t i = start; i < list.size() - 1; ++i) {
     if (!IsPrimitiveCNode(list[i], prim::kPrimPartial) && AnfAlgo::IsRealKernel(list[i])) {
       return list[i];
@@ -83,11 +94,11 @@ NotNull<CNodePtr> AscendControlParser::ProcessKernelGraph(NotNull<KernelGraphPtr
   memo->insert(kg.get());
 
   // 2. args replace placeholder
-  LinkParentGraph(kg, last_node, last_label, memo);
+  LinkParentGraph(kg, last_node, last_label);
 
   // 3. topological sort
   kg->SetExecOrderByDefault();
-  std::vector<CNodePtr> nodes = kg->execution_order();
+  const std::vector<CNodePtr> &nodes = kg->execution_order();
   if (nodes.empty()) {
     MS_LOG(EXCEPTION) << "KernelGraph " << kg->ToString() << " has no cnodes!";
   }
@@ -149,9 +160,9 @@ void AscendControlParser::InsertControlDependToGraph(NotNull<KernelGraphPtr> kg,
 }
 
 void AscendControlParser::LinkParentGraph(NotNull<KernelGraphPtr> kg, const CNodePtr &from_graph_call_node,
-                                          const CNodePtr &last_label, NotNull<std::set<KernelGraphPtr> *> memo) {
+                                          const CNodePtr &last_label) {
   auto origin_return = kg->get_return();
-  std::vector<AnfNodePtr> origin_return_inputs = origin_return->inputs();
+  const std::vector<AnfNodePtr> &origin_return_inputs = origin_return->inputs();
   // if entry graph, replace return with make_tuple
   if (from_graph_call_node == nullptr || last_label == nullptr) {
     MS_LOG(INFO) << kg->ToString() << " is entry graph.";
@@ -173,7 +184,7 @@ void AscendControlParser::RecurseCall(NotNull<KernelGraphPtr> kg, NotNull<CNodeP
   MS_LOG(INFO) << "process call func " << cur_node->DebugString();
 
   // 1 get kernel graph
-  auto origin_inputs = cur_node->inputs();
+  const std::vector<AnfNodePtr> &origin_inputs = cur_node->inputs();
   std::vector<AnfNodePtr> new_inputs = {std::make_shared<ValueNode>(std::make_shared<Primitive>(kLabelGotoOpName))};
   if (!IsValueNode<KernelGraph>(origin_inputs[kCNodeCallArg])) {
     MS_LOG(WARNING) << "Node " << cur_node->DebugString(10) << " index " << kCNodeCallArg << " is not a ValueNode";
@@ -217,15 +228,14 @@ void AscendControlParser::RecurseSwitch(NotNull<KernelGraphPtr> kg, NotNull<CNod
     InsertControlDependToGraph(kg, NOT_NULL(back_label), NOT_NULL(next_node));
   }
   // 3 recurse sub graph
-  auto origin_switch_inputs = cur_node->inputs();
+  const std::vector<AnfNodePtr> &origin_switch_inputs = cur_node->inputs();
   std::vector<AnfNodePtr> new_switch_inputs = {
     std::make_shared<ValueNode>(std::make_shared<Primitive>(kLabelSwitchOpName)),
     origin_switch_inputs[kCNodeSwitchCond]};
   for (size_t i = kCNodeSwitchCond + 1; i < kCNodeSwitchLength; ++i) {
     // 3.1 branch kernel graph and args
-    CNodePtr partial;
     KernelGraphPtr branch_fg;
-    std::tie(partial, branch_fg) = ParsePartial(NOT_NULL(origin_switch_inputs[i]));
+    std::tie(std::ignore, branch_fg) = ParsePartial(NOT_NULL(origin_switch_inputs[i]));
     // 3.2 recurse sub graph
     CNodePtr branch_label = ProcessKernelGraph(NOT_NULL(branch_fg), cur_node, back_label, memo);
     new_switch_inputs.push_back(branch_label);
@@ -249,9 +259,9 @@ void AscendControlParser::RecurseSwitchLayer(NotNull<KernelGraphPtr> kg, NotNull
   auto branch_tuple = cur_node->input(kCNodeSwitchLayerBranch);
   MS_EXCEPTION_IF_NULL(branch_tuple);
   if (!branch_tuple->isa<CNode>()) {
-    MS_LOG(EXCEPTION) << "Inputs of apply node must more than " << kCNodeSwitchLayerLength;
+    MS_LOG(EXCEPTION) << branch_tuple->DebugString() << " is not a CNode";
   }
-  auto branch_partial = utils::cast<CNodePtr>(branch_tuple)->inputs();
+  const std::vector<AnfNodePtr> &branch_partial = utils::cast<CNodePtr>(branch_tuple)->inputs();
   // 1 return label
   auto back_label = kg->NewCNode({std::make_shared<ValueNode>(std::make_shared<Primitive>(kLabelSetOpName))});
   // 2 add depend relationship
@@ -260,15 +270,14 @@ void AscendControlParser::RecurseSwitchLayer(NotNull<KernelGraphPtr> kg, NotNull
     InsertControlDependToGraph(kg, NOT_NULL(back_label), NOT_NULL(next_node));
   }
   // 3 recurse sub graph
-  auto origin_switch_inputs = cur_node->inputs();
+  const std::vector<AnfNodePtr> &origin_switch_inputs = cur_node->inputs();
   std::vector<AnfNodePtr> new_switch_inputs = {
     std::make_shared<ValueNode>(std::make_shared<Primitive>(kLabelSwitchOpName)),
     origin_switch_inputs[kCNodeSwitchCond]};
   for (size_t i = 0; i < branch_partial.size(); ++i) {
     // 3.1 branch kernel graph and args
-    CNodePtr partial;
     KernelGraphPtr branch_fg;
-    std::tie(partial, branch_fg) = ParsePartial(NOT_NULL(origin_switch_inputs[i]));
+    std::tie(std::ignore, branch_fg) = ParsePartial(NOT_NULL(origin_switch_inputs[i]));
     // 3.2 recurse sub graph
     CNodePtr branch_label = ProcessKernelGraph(NOT_NULL(branch_fg), cur_node, back_label, memo);
     new_switch_inputs.push_back(branch_label);
@@ -315,18 +324,6 @@ void AscendControlParser::InsertAssignToGraph(NotNull<KernelGraphPtr> kg, NotNul
   InsertDependToGraph(kg, NOT_NULL(assign_node));
 }
 
-NotNull<AnfNodePtr> AscendControlParser::GetRealInput(NotNull<KernelGraphPtr> from_graph,
-                                                      NotNull<KernelGraphPtr> to_graph, NotNull<AnfNodePtr> param) {
-  std::set<AnfNodePtr> args_list = to_graph->GetRealInput(param);
-  for (auto arg : args_list) {
-    if (arg->func_graph() == from_graph.get()) {
-      return NOT_NULL(arg);
-    }
-  }
-  MS_LOG(EXCEPTION) << to_graph->ToString() << " input " << param->DebugString() << " not from "
-                    << from_graph->ToString();
-}
-
 void AscendControlParser::LinkArgsToParam(NotNull<KernelGraphPtr> to_graph, NotNull<KernelGraphPtr> target_graph,
                                           NotNull<AnfNodePtr> arg, NotNull<AnfNodePtr> param) {
   if (IsPrimitiveCNode(arg, prim::kPrimMakeTuple) && IsPrimitiveCNode(param, prim::kPrimMakeTuple)) {
@@ -369,10 +366,10 @@ std::vector<CNodePtr> AscendControlParser::RecurseGraph(const CNodePtr &cur_labe
     return {};
   }
   memo->insert(graph.get());
-
+  const std::vector<std::shared_ptr<KernelGraph>> &child_graph_order = graph->child_graph_order();
   graph->SetExecOrderByDefault();
 
-  std::vector<CNodePtr> cnodes = graph->execution_order();
+  const std::vector<CNodePtr> &cnodes = graph->execution_order();
   std::map<uint32_t, CNodePtr> label_map;
   std::map<CNodePtr, std::vector<uint32_t>> label_switch_map;
   std::tie(label_map, label_switch_map) = GetLabelNode(cnodes);
@@ -388,10 +385,10 @@ std::vector<CNodePtr> AscendControlParser::RecurseGraph(const CNodePtr &cur_labe
       std::find_if(label_map.begin(), label_map.end(),
                    [node](const std::map<uint32_t, CNodePtr>::value_type iter) { return iter.second == node; });
     if (AnfAlgo::CheckPrimitiveType(node, prim::kPrimLabelGoto)) {
-      if (!CheckLabelIndex(label_iter->first, 0, label_iter->second, graph)) {
+      if (label_iter == label_map.end() || !CheckLabelIndex(label_iter->first, 0, label_iter->second, graph)) {
         MS_LOG(EXCEPTION) << "Check label index fail";
       }
-      auto child_graph = graph->child_graph_order()[label_iter->first];
+      auto child_graph = child_graph_order[label_iter->first];
       if (child_graph == graph->parent_graph()) {
         continue;
       }
@@ -407,7 +404,7 @@ std::vector<CNodePtr> AscendControlParser::RecurseGraph(const CNodePtr &cur_labe
         if (!CheckLabelIndex(label_iter->first + i, label_list[i], label_iter->second, graph)) {
           MS_LOG(EXCEPTION) << "Check label index fail";
         }
-        auto child_graph = graph->child_graph_order()[label_iter->first + i];
+        auto child_graph = child_graph_order[label_iter->first + i];
         if (child_graph == graph->parent_graph()) {
           continue;
         }
@@ -426,10 +423,11 @@ std::vector<CNodePtr> AscendControlParser::RecurseGraph(const CNodePtr &cur_labe
 
 bool AscendControlParser::CheckLabelIndex(uint32_t order_index, uint32_t label_index, const CNodePtr &cur_label,
                                           NotNull<KernelGraphPtr> graph) {
+  const std::vector<std::shared_ptr<KernelGraph>> &child_graph_order = graph->child_graph_order();
   // check index and child order size
-  if (graph->child_graph_order().size() <= static_cast<size_t>(order_index)) {
+  if (child_graph_order.size() <= IntToSize(order_index)) {
     MS_LOG(EXCEPTION) << "Child graph order is wrong, graph " << graph->ToString() << " child graph size "
-                      << graph->child_graph_order().size() << " goto index " << order_index;
+                      << child_graph_order.size() << " goto index " << order_index;
   }
 
   if (AnfAlgo::CheckPrimitiveType(cur_label, prim::kPrimLabelGoto)) {
@@ -443,7 +441,7 @@ bool AscendControlParser::CheckLabelIndex(uint32_t order_index, uint32_t label_i
     label_index = label_goto_index;
   }
   // get start_label_set_index of child graph
-  auto child_graph = graph->child_graph_order()[order_index];
+  auto child_graph = child_graph_order[order_index];
   MS_EXCEPTION_IF_NULL(child_graph);
   auto start_label_set = child_graph->get_start_label();
   if (!AnfAlgo::HasNodeAttr(kAttrLabelIndex, start_label_set)) {
@@ -468,8 +466,7 @@ std::tuple<std::map<uint32_t, CNodePtr>, std::map<CNodePtr, std::vector<uint32_t
   uint32_t index = 0;
   for (auto &node : nodes) {
     if (AnfAlgo::CheckPrimitiveType(node, prim::kPrimLabelGoto)) {
-      label_map[index] = node;
-      ++index;
+      label_map[index++] = node;
     } else if (AnfAlgo::CheckPrimitiveType(node, prim::kPrimLabelSwitch)) {
       if (!AnfAlgo::HasNodeAttr(kAttrLabelSwitchList, node)) {
         MS_LOG(EXCEPTION) << "LabelSwitchKernel has no attr label_switch_list";
@@ -479,8 +476,7 @@ std::tuple<std::map<uint32_t, CNodePtr>, std::map<CNodePtr, std::vector<uint32_t
       std::vector<uint32_t> label_list = GetValue<std::vector<uint32_t>>(primitive->GetAttr(kAttrLabelSwitchList));
       label_switch_map.insert({node, label_list});
       for (size_t i = 0; i < label_list.size(); ++i) {
-        label_map[index] = node;
-        ++index;
+        label_map[index++] = node;
       }
     }
   }
diff --git a/mindspore/ccsrc/session/ascend_control_parser.h b/mindspore/ccsrc/session/ascend_control_parser.h
index 0f08d39c82..0201d27618 100644
--- a/mindspore/ccsrc/session/ascend_control_parser.h
+++ b/mindspore/ccsrc/session/ascend_control_parser.h
@@ -49,16 +49,15 @@ class AscendControlParser {
                                  NotNull<std::set<KernelGraphPtr> *> memo);
 
   static void LinkParentGraph(NotNull<KernelGraphPtr> kg, const CNodePtr &from_graph_call_node,
-                              const CNodePtr &last_label, NotNull<std::set<KernelGraphPtr> *> memo);
+                              const CNodePtr &last_label);
   static std::tuple<CNodePtr, KernelGraphPtr> ParsePartial(NotNull<AnfNodePtr> node);
 
   static void LinkArgsToParam(NotNull<KernelGraphPtr> to_graph, NotNull<KernelGraphPtr> target_graph,
                               NotNull<AnfNodePtr> arg, NotNull<AnfNodePtr> param);
-  static NotNull<AnfNodePtr> GetRealInput(NotNull<KernelGraphPtr> from_graph, NotNull<KernelGraphPtr> to_graph,
-                                          NotNull<AnfNodePtr> param);
+
   static void InsertAssignToGraph(NotNull<KernelGraphPtr> kg, NotNull<AnfNodePtr> from, NotNull<AnfNodePtr> to);
 
-  static CNodePtr GetNextRealKernel(std::vector<CNodePtr> list, size_t start);
+  static CNodePtr GetNextRealKernel(const std::vector<CNodePtr> &list, size_t start);
 
   // root graph order
   static std::tuple<std::map<uint32_t, CNodePtr>, std::map<CNodePtr, std::vector<uint32_t>>> GetLabelNode(
@@ -67,20 +66,7 @@ class AscendControlParser {
                               NotNull<KernelGraphPtr> graph);
   static std::vector<CNodePtr> RecurseGraph(const CNodePtr &cur_label_goto, const CNodePtr &end_label_goto,
                                             NotNull<KernelGraphPtr> graph, NotNull<std::set<KernelGraphPtr> *> memo);
-
-  static constexpr size_t kCNodePrim = 0;
-  static constexpr size_t kCNodeCallArg = 1;
-  static constexpr size_t kCNodeSwitchCond = 1;
-  static constexpr size_t kCNodeSwitchTrue = 2;
-  static constexpr size_t kCNodeSwitchFalse = 3;
-  static constexpr size_t kCNodeSwitchLength = 4;
-  static constexpr size_t kCNodePartialLength = 2;
-  static constexpr size_t kCNodePartialFunc = 1;
-  static constexpr size_t kCNodeSwitchLayerCond = 1;
-  static constexpr size_t kCNodeSwitchLayerBranch = 2;
-  static constexpr size_t kCNodeSwitchLayerLength = 3;
 };
-
 }  // namespace session
 }  // namespace mindspore
 
diff --git a/mindspore/ccsrc/session/ascend_session.cc b/mindspore/ccsrc/session/ascend_session.cc
index b99c99443d..ef6ab83727 100644
--- a/mindspore/ccsrc/session/ascend_session.cc
+++ b/mindspore/ccsrc/session/ascend_session.cc
@@ -256,7 +256,6 @@ static void UpdateRealInput(KernelGraph *graph) {
 void RecurseToUpdateCallRealInput(KernelGraph *graph) {
   MS_EXCEPTION_IF_NULL(graph);
   MS_LOG(INFO) << "start graph id:" << graph->graph_id();
-  graph->UpdateCallRealInput();
   for (auto &child_graph : graph->child_graph_order()) {
     if (child_graph == graph->parent_graph()) {
       MS_LOG(INFO) << "Child graph:" << child_graph->graph_id()
@@ -265,6 +264,8 @@ void RecurseToUpdateCallRealInput(KernelGraph *graph) {
     }
     RecurseToUpdateCallRealInput(child_graph.get());
   }
+  // this action should from bottom to top
+  graph->UpdateCallRealInput();
 }
 }  // namespace
 
@@ -280,27 +281,20 @@ GraphId AscendSession::CompileGraph(const AnfNodePtrList &lst, const AnfNodePtrL
 GraphId AscendSession::CompileGraph(NotNull<FuncGraphPtr> func_graph) {
   MS_LOG(INFO) << "start";
   auto graph = ConstructKernelGraph(func_graph);
-  MS_LOG(INFO) << "graph input size:" << graph->inputs().size();
   // split switch
   SplitGraphs(graph);
-  MS_LOG(INFO) << "graph input size:" << graph->inputs().size();
   // insert goto labels and label_sets
   LinkChildGraphs(NOT_NULL(graph));
-  MS_LOG(INFO) << "graph input size:" << graph->inputs().size();
   // resource initialize
   InitRuntimeResource();
   // assign label
   AssignLabel(NOT_NULL(graph));
-  MS_LOG(INFO) << "graph input size:" << graph->inputs().size();
   // recurse compile child graph
   RecurseCompileGraph(graph);
-  MS_LOG(INFO) << "graph input size:" << graph->inputs().size();
   // root graph valiate,include genearte execute order and so on
   RootGraphExecutorValidate(NOT_NULL(graph));
-  MS_LOG(INFO) << "graph input size:" << graph->inputs().size();
   // adjust kernel
   AdjustKernel(graph);
-  MS_LOG(INFO) << "graph input size:" << graph->inputs().size();
   // assign stream
   AssignStream(graph);
   // build kernel
@@ -313,7 +307,6 @@ GraphId AscendSession::CompileGraph(NotNull<FuncGraphPtr> func_graph) {
   LoadTask(graph);
   // return the graph id to backend
   auto graph_id = graph->graph_id();
-  MS_LOG(INFO) << "Compile graph " << graph_id << " success";
   return graph_id;
 }
 
diff --git a/mindspore/ccsrc/session/kernel_graph.cc b/mindspore/ccsrc/session/kernel_graph.cc
index 1db932cd30..09cab04f55 100644
--- a/mindspore/ccsrc/session/kernel_graph.cc
+++ b/mindspore/ccsrc/session/kernel_graph.cc
@@ -606,10 +606,6 @@ void KernelGraph::ReplaceNode(const AnfNodePtr &old_anf_node, AnfNodePtr new_anf
           break;
         }
       }
-      MS_LOG(INFO) << "Inputs of graph id:" << graph_id();
-      for (size_t i = 0; i < inputs().size(); i++) {
-        MS_LOG(INFO) << "[" << i << "]:" << inputs()[i]->DebugString();
-      }
     }
     // update front to backend map
     FrontBackendlMapUpdate(old_anf_node, new_anf_node);
@@ -713,6 +709,9 @@ void KernelGraph::UpdateCallRealInput() {
       MS_LOG(INFO) << "paramter: " << parameter->DebugString()
                    << " insert real input:" << new_real_input->DebugString();
       (void)real_inputs.insert(new_real_input);
+      if (new_real_input->isa<Parameter>()) {
+        ReplaceNode(parameter, new_real_input);
+      }
     }
   }
 }