graphengine/tests/ut/ge/graph/passes/flow_ctrl_pass_unittest.cc

/**
 * Copyright 2019-2020 Huawei Technologies Co., Ltd
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <gtest/gtest.h>

#include "common/ge_inner_error_codes.h"
#include "common/types.h"
#include "graph/manager/graph_var_manager.h"
#include "graph/utils/attr_utils.h"
#include "graph/utils/graph_utils.h"
#include "inc/pass_manager.h"

#define private public
#include "graph/passes/flow_ctrl_pass.h"
#undef private

using namespace domi;

namespace ge {
class UTEST_graph_passes_flow_ctrl_pass : public testing::Test {
 protected:
  void SetUp() {
    uint64_t session_id = 0;
    uint32_t device_id = 0;
    uint64_t job_id = 0;
    uint32_t session_version = 0;
    EXPECT_EQ(domi::SUCCESS, ge::VarManager::Instance(0)->Init(session_version, session_id, device_id, job_id));
  }

  void TearDown() { VarManagerPool::Instance().Destory(); }

 public:
  /// Set up a graph with the following network structure
  ///        IteratorGetNext
  ///              |
  ///          MemcpyAsync
  ///              |
  ///              A
  ///              |
  ///          NetOutput
  void MakeGraph(ge::ComputeGraphPtr &graph) {
    auto desc_ptr = make_shared<ge::GeTensorDesc>();
    auto desc = *desc_ptr;

    ge::OpDescPtr op_desc_get_next = make_shared<ge::OpDesc>("IteratorGetNext", FRAMEWORKOP);

    op_desc_get_next->AddOutputDesc(desc);

    ge::OpDescPtr op_desc_memcpy = make_shared<ge::OpDesc>("MemcpyAsync", MEMCPYASYNC);
    op_desc_memcpy->AddInputDesc(desc);
    op_desc_memcpy->AddOutputDesc(desc);
    ge::AttrUtils::SetBool(op_desc_memcpy, ATTR_NAME_STREAM_CYCLE_EVENT_FLAG, true);

    ge::OpDescPtr op_desc_a = make_shared<ge::OpDesc>("A", RESOURCEAPPLYMOMENTUM);
    op_desc_a->AddInputDesc(desc);
    op_desc_a->AddOutputDesc(desc);

    ge::OpDescPtr op_desc_gatherv2 = make_shared<ge::OpDesc>("GatherV2", GATHERV2);
    op_desc_gatherv2->AddInputDesc(desc);
    op_desc_gatherv2->AddOutputDesc(desc);

    ge::OpDescPtr op_desc_global_step = make_shared<ge::OpDesc>("global_step", VARIABLE);
    op_desc_global_step->AddOutputDesc(desc);

    ge::OpDescPtr op_desc_netout = make_shared<ge::OpDesc>("NetOutput", NETOUTPUT);
    ge::AttrUtils::SetInt(op_desc_netout, ATTR_NAME_TRUE_BRANCH_STREAM, TRUE_STREAM_ID);
    op_desc_netout->AddInputDesc(desc);
    op_desc_netout->AddInputDesc(desc);

    // add node
    ge::NodePtr get_next_node = graph->AddNode(op_desc_get_next);
    ge::NodePtr memcpy_node = graph->AddNode(op_desc_memcpy);
    ge::NodePtr node_a = graph->AddNode(op_desc_a);
    ge::NodePtr global_step = graph->AddNode(op_desc_global_step);
    ge::NodePtr gatherv2 = graph->AddNode(op_desc_gatherv2);
    ge::NodePtr netoutput = graph->AddNode(op_desc_netout);

    // add edge
    ge::GraphUtils::AddEdge(get_next_node->GetOutDataAnchor(0), memcpy_node->GetInDataAnchor(0));
    ge::GraphUtils::AddEdge(memcpy_node->GetOutDataAnchor(0), node_a->GetInDataAnchor(0));
    ge::GraphUtils::AddEdge(node_a->GetOutDataAnchor(0), netoutput->GetInDataAnchor(0));
    ge::GraphUtils::AddEdge(gatherv2->GetOutDataAnchor(0), netoutput->GetInDataAnchor(1));

    ge::GraphUtils::AddEdge(global_step->GetOutDataAnchor(0), gatherv2->GetInDataAnchor(0));
  }

  void AddSessionVariables(void) {
    static std::set<std::string> varList = {
        NODE_NAME_FLOWCTRL_LOOP_PER_ITER,
        NODE_NAME_FLOWCTRL_LOOP_COND,
        NODE_NAME_FLOWCTRL_LOOP_INCREMENT,
        NODE_NAME_FLOWCTRL_LOOP_RESETVALUE,
        NODE_NAME_GLOBAL_STEP,
    };

    uint8_t *dev_ptr = nullptr;
    ge::GeTensorDesc tensor_desc(ge::GeShape({1}), ge::FORMAT_NHWC, ge::DT_UINT64);
    for (std::string var_name : varList) {
      EXPECT_EQ(domi::SUCCESS, ge::VarManager::Instance(0)->SetVarAddr(var_name, tensor_desc, dev_ptr, RT_MEMORY_HBM));
    }
  }
};

TEST_F(UTEST_graph_passes_flow_ctrl_pass, FlowCtrlPass_Success_Test) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("FlowCtrlPassSuccess");
  graph->SetNeedIteration(true);

  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();

  AddSessionVariables();
  FlowCtrlPass flow_ctrl_pass;
  Status ret = flow_ctrl_pass.Run(graph);
  EXPECT_EQ(ret, SUCCESS);
  EXPECT_EQ(16, graph->GetDirectNodesSize());

  int stream_switch_cnt = 0;
  int stream_activeCnt = 0;
  for (ge::NodePtr node : graph->GetDirectNode()) {
    if (node->GetOpDesc()->GetType() == STREAMSWITCH) {
      stream_switch_cnt++;
    } else if (node->GetOpDesc()->GetType() == STREAMACTIVE) {
      stream_activeCnt++;
    }
  }
  EXPECT_EQ(stream_switch_cnt, 2);
  EXPECT_EQ(stream_activeCnt, 2);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, FlowCtrlPass_Success_VAR_NODE_ADD_BEFORE) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("FlowCtrlPassSuccess");
  graph->SetNeedIteration(true);

  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();

  AddSessionVariables();
  FlowCtrlPass flow_ctrl_pass;

  NodePtr loop_cond_node = flow_ctrl_pass.AddVariableNode(graph, NODE_NAME_FLOWCTRL_LOOP_COND);
  EXPECT_NE(loop_cond_node, nullptr);
  NodePtr loop_increment_node = flow_ctrl_pass.AddVariableNode(graph, NODE_NAME_FLOWCTRL_LOOP_INCREMENT);
  EXPECT_NE(loop_increment_node, nullptr);
  NodePtr loop_reset_node = flow_ctrl_pass.AddVariableNode(graph, NODE_NAME_FLOWCTRL_LOOP_RESETVALUE);
  EXPECT_NE(loop_reset_node, nullptr);
  NodePtr iter_per_loop_node = flow_ctrl_pass.AddVariableNode(graph, NODE_NAME_FLOWCTRL_LOOP_PER_ITER);
  EXPECT_NE(iter_per_loop_node, nullptr);
  Status ret = flow_ctrl_pass.Run(graph);
  EXPECT_EQ(ret, ge::SUCCESS);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, FlowCtrlPass_NOT_TRAIN) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("TestNotChange");
  graph->SetNeedIteration(false);

  FlowCtrlPass flow_ctrl_pass;
  Status ret = flow_ctrl_pass.Run(graph);
  EXPECT_EQ(ret, NOT_CHANGED);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, AddFpBpIteratorCtrl_WITHOUT_VAR) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("TestNotChange");
  graph->SetNeedIteration(true);
  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();

  // must have NODE_NAME_FLOWCTRL_LOOP_PER_ITER
  ge::GeTensorDesc tensor_desc(ge::GeShape({1}), ge::FORMAT_NHWC, ge::DT_UINT64);
  uint8_t *dev_ptr = nullptr;
  EXPECT_EQ(SUCCESS, ge::VarManager::Instance(0)->SetVarAddr(NODE_NAME_FLOWCTRL_LOOP_PER_ITER, tensor_desc,
                                                                   dev_ptr, RT_MEMORY_HBM));
  // not add var
  FlowCtrlPass flow_ctrl_pass;
  Status ret = flow_ctrl_pass.Run(graph);
  EXPECT_NE(ret, ge::SUCCESS);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, Run_AddSpecialNodeIteratorCtrl_NO_INANCHOR) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_WITHOUT_LOOP_PER_ITER");
  graph->SetNeedIteration(true);
  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();

  AddSessionVariables();
  FlowCtrlPass flow_ctrl_pass;
  NodePtr getnext_node = graph->FindNode("IteratorGetNext");
  NodePtr memcpy_node = graph->FindNode("MemcpyAsync");
  GraphUtils::RemoveEdge(getnext_node->GetOutDataAnchor(0), memcpy_node->GetInDataAnchor(0));
  Status ret = flow_ctrl_pass.Run(graph);
  EXPECT_NE(ret, ge::SUCCESS);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, AddFpBpIteratorCtrl_WITHOUT_LOOP_COND) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_WITHOUT_LOOP_COND");
  graph->SetNeedIteration(true);
  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();
  std::set<std::string> varList = {
      NODE_NAME_FLOWCTRL_LOOP_PER_ITER,
      NODE_NAME_FLOWCTRL_LOOP_INCREMENT,
      NODE_NAME_FLOWCTRL_LOOP_RESETVALUE,
      NODE_NAME_GLOBAL_STEP,
  };
  // must have NODE_NAME_FLOWCTRL_LOOP_PER_ITER
  ge::GeTensorDesc tensor_desc(ge::GeShape({1}), ge::FORMAT_NHWC, ge::DT_UINT64);
  uint8_t *dev_ptr = nullptr;
  for (std::string var_name : varList) {
    EXPECT_EQ(domi::SUCCESS, ge::VarManager::Instance(0)->SetVarAddr(var_name, tensor_desc, dev_ptr, RT_MEMORY_HBM));
  }
  // not add var
  FlowCtrlPass flow_ctrl_pass;
  NodePtr pre_node = graph->FindNode("NetOutput");
  Status ret = flow_ctrl_pass.AddFpBpIteratorCtrl(graph, pre_node);
  EXPECT_EQ(ret, FAILED);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, AddFpBpIteratorCtrl_WITHOUT_LOOP_INCREMENT) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_WITHOUT_LOOP_INCREMENT");
  graph->SetNeedIteration(true);
  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();
  std::set<std::string> varList = {
      NODE_NAME_FLOWCTRL_LOOP_PER_ITER,
      NODE_NAME_FLOWCTRL_LOOP_COND,
      NODE_NAME_FLOWCTRL_LOOP_RESETVALUE,
      NODE_NAME_GLOBAL_STEP,
  };
  // must have NODE_NAME_FLOWCTRL_LOOP_PER_ITER
  ge::GeTensorDesc tensor_desc(ge::GeShape({1}), ge::FORMAT_NHWC, ge::DT_UINT64);
  uint8_t *dev_ptr = nullptr;
  for (std::string var_name : varList) {
    EXPECT_EQ(domi::SUCCESS, ge::VarManager::Instance(0)->SetVarAddr(var_name, tensor_desc, dev_ptr, RT_MEMORY_HBM));
  }
  // not add var
  FlowCtrlPass flow_ctrl_pass;
  NodePtr pre_node = graph->FindNode("NetOutput");
  Status ret = flow_ctrl_pass.AddFpBpIteratorCtrl(graph, pre_node);
  EXPECT_EQ(ret, FAILED);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, AddFpBpIteratorCtrl_WITHOUT_LOOP_RESETVALUE) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_WITHOUT_LOOP_RESETVALUE");
  graph->SetNeedIteration(true);
  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();
  std::set<std::string> varList = {
      NODE_NAME_FLOWCTRL_LOOP_PER_ITER,
      NODE_NAME_FLOWCTRL_LOOP_COND,
      NODE_NAME_FLOWCTRL_LOOP_INCREMENT,
      NODE_NAME_GLOBAL_STEP,
  };
  // must have NODE_NAME_FLOWCTRL_LOOP_PER_ITER
  ge::GeTensorDesc tensor_desc(ge::GeShape({1}), ge::FORMAT_NHWC, ge::DT_UINT64);
  uint8_t *dev_ptr = nullptr;
  for (std::string var_name : varList) {
    EXPECT_EQ(domi::SUCCESS, ge::VarManager::Instance(0)->SetVarAddr(var_name, tensor_desc, dev_ptr, RT_MEMORY_HBM));
  }
  // not add var
  FlowCtrlPass flow_ctrl_pass;
  NodePtr pre_node = graph->FindNode("NetOutput");
  Status ret = flow_ctrl_pass.AddFpBpIteratorCtrl(graph, pre_node);
  EXPECT_EQ(ret, FAILED);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, AddFpBpIteratorCtrl_WITHOUT_LOOP_PER_ITER) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_WITHOUT_LOOP_PER_ITER");
  graph->SetNeedIteration(true);
  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();
  std::set<std::string> varList = {
      NODE_NAME_FLOWCTRL_LOOP_COND,
      NODE_NAME_FLOWCTRL_LOOP_INCREMENT,
      NODE_NAME_FLOWCTRL_LOOP_RESETVALUE,
      NODE_NAME_GLOBAL_STEP,
  };
  // must have NODE_NAME_FLOWCTRL_LOOP_PER_ITER
  ge::GeTensorDesc tensor_desc(ge::GeShape({1}), ge::FORMAT_NHWC, ge::DT_UINT64);
  uint8_t *dev_ptr = nullptr;
  for (std::string var_name : varList) {
    EXPECT_EQ(domi::SUCCESS, ge::VarManager::Instance(0)->SetVarAddr(var_name, tensor_desc, dev_ptr, RT_MEMORY_HBM));
  }
  FlowCtrlPass flow_ctrl_pass;
  NodePtr pre_node = graph->FindNode("NetOutput");
  Status ret = flow_ctrl_pass.AddFpBpIteratorCtrl(graph, pre_node);
  EXPECT_EQ(ret, FAILED);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, AddSpecialNodeIteratorCtrl_WITHOUT_LOOP_COND) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_WITHOUT_LOOP_COND");
  graph->SetNeedIteration(true);
  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();
  std::set<std::string> varList = {
      NODE_NAME_FLOWCTRL_LOOP_PER_ITER,
      NODE_NAME_FLOWCTRL_LOOP_INCREMENT,
      NODE_NAME_FLOWCTRL_LOOP_RESETVALUE,
      NODE_NAME_GLOBAL_STEP,
  };
  // must have NODE_NAME_FLOWCTRL_LOOP_PER_ITER
  ge::GeTensorDesc tensor_desc(ge::GeShape({1}), ge::FORMAT_NHWC, ge::DT_UINT64);
  uint8_t *dev_ptr = nullptr;
  for (std::string var_name : varList) {
    EXPECT_EQ(domi::SUCCESS, ge::VarManager::Instance(0)->SetVarAddr(var_name, tensor_desc, dev_ptr, RT_MEMORY_HBM));
  }

  FlowCtrlPass flow_ctrl_pass;
  NodePtr iter_per_loop_node = flow_ctrl_pass.AddVariableNode(graph, NODE_NAME_FLOWCTRL_LOOP_PER_ITER);
  EXPECT_NE(iter_per_loop_node, nullptr);
  NodePtr memcpy_node = graph->FindNode("MemcpyAsync");
  Status ret = flow_ctrl_pass.AddSpecialNodeIteratorCtrl(graph, memcpy_node);
  EXPECT_EQ(ret, FAILED);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, AddSpecialNodeIteratorCtrl_WITHOUT_LOOP_PER_ITER) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_WITHOUT_LOOP_PER_ITER");
  graph->SetNeedIteration(true);
  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();
  std::set<std::string> varList = {
      NODE_NAME_FLOWCTRL_LOOP_COND,
      NODE_NAME_FLOWCTRL_LOOP_INCREMENT,
      NODE_NAME_FLOWCTRL_LOOP_RESETVALUE,
      NODE_NAME_GLOBAL_STEP,
  };
  ge::GeTensorDesc tensor_desc(ge::GeShape({1}), ge::FORMAT_NHWC, ge::DT_UINT64);
  uint8_t *dev_ptr = nullptr;
  for (std::string var_name : varList) {
    EXPECT_EQ(domi::SUCCESS, ge::VarManager::Instance(0)->SetVarAddr(var_name, tensor_desc, dev_ptr, RT_MEMORY_HBM));
  }

  FlowCtrlPass flow_ctrl_pass;
  NodePtr loop_cond_node = flow_ctrl_pass.AddVariableNode(graph, NODE_NAME_FLOWCTRL_LOOP_COND);
  EXPECT_NE(loop_cond_node, nullptr);
  NodePtr memcpy_node = graph->FindNode("MemcpyAsync");
  Status ret = flow_ctrl_pass.AddSpecialNodeIteratorCtrl(graph, memcpy_node);
  EXPECT_EQ(ret, FAILED);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, AddSpecialNodeIteratorCtrl_NO_INANCHOR) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_WITHOUT_LOOP_PER_ITER");
  graph->SetNeedIteration(true);
  // Create graph
  MakeGraph(graph);
  graph->TopologicalSorting();

  FlowCtrlPass flow_ctrl_pass;
  NodePtr getnext_node = graph->FindNode("IteratorGetNext");
  NodePtr memcpy_node = graph->FindNode("MemcpyAsync");
  GraphUtils::RemoveEdge(getnext_node->GetOutDataAnchor(0), memcpy_node->GetInDataAnchor(0));
  Status ret = flow_ctrl_pass.AddSpecialNodeIteratorCtrl(graph, memcpy_node);
  EXPECT_EQ(ret, FAILED);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, InsertAssignOp_SUCCESS) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_InsertAssignOp");

  FlowCtrlPass flow_ctrl_pass;
  GeTensorDesc tmp_geT_tensor_desc;
  NodePtr ref_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {tmp_geT_tensor_desc});
  NodePtr value_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {tmp_geT_tensor_desc});
  NodePtr add_node = flow_ctrl_pass.InsertAssignOp(graph, ASSIGNADD, "add_node", ref_node, value_node);
  EXPECT_NE(add_node, nullptr);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, InsertAssignOp_REF_NODE_NO_OUTANCHOR) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_InsertAssignOp");

  FlowCtrlPass flow_ctrl_pass;
  GeTensorDesc tmp_geT_tensor_desc;
  NodePtr ref_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {});
  NodePtr value_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {tmp_geT_tensor_desc});
  NodePtr add_node = flow_ctrl_pass.InsertAssignOp(graph, ASSIGNADD, "add_node", ref_node, value_node);
  EXPECT_EQ(add_node, nullptr);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, InsertAssignOp_VALUE_NODE_NO_OUTANCHOR) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_InsertAssignOp");

  FlowCtrlPass flow_ctrl_pass;
  GeTensorDesc tmp_geT_tensor_desc;
  NodePtr ref_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {tmp_geT_tensor_desc});
  NodePtr value_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {});
  NodePtr add_node = flow_ctrl_pass.InsertAssignOp(graph, ASSIGNADD, "add_node", ref_node, value_node);
  EXPECT_EQ(add_node, nullptr);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, CreateIterCtrlFalseBranch_InsertAssignOp_FAILED) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("Test_CreateIterCtrlFalseBranch_InsertAssignOp_FAILED");

  FlowCtrlPass flow_ctrl_pass;
  GeTensorDesc tmp_geT_tensor_desc;
  NodePtr ref_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {tmp_geT_tensor_desc});
  NodePtr value_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {});
  NodePtr switch_node = flow_ctrl_pass.InsertOp(graph, STREAMSWITCH, "switch_node", {}, {});
  Status ret = flow_ctrl_pass.CreateIterCtrlFalseBranch(graph, ref_node, value_node, switch_node);
  EXPECT_EQ(ret, FAILED);
}

TEST_F(UTEST_graph_passes_flow_ctrl_pass, CreateIterCtrlTrueBranch_InsertAssignOp_FAILED) {
  ge::ComputeGraphPtr graph = make_shared<ge::ComputeGraph>("CreateIterCtrlTrueBranch_InsertAssignOp_FAILED");

  FlowCtrlPass flow_ctrl_pass;
  GeTensorDesc tmp_geT_tensor_desc;
  NodePtr ref_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {tmp_geT_tensor_desc});
  NodePtr value_node = flow_ctrl_pass.InsertOp(graph, VARIABLE, "ref_node", {}, {});
  NodePtr switch_node = flow_ctrl_pass.InsertOp(graph, STREAMSWITCH, "switch_node", {}, {});
  Status ret = flow_ctrl_pass.CreateIterCtrlTrueBranch(graph, ref_node, value_node, switch_node);
  EXPECT_EQ(ret, FAILED);
}
}  // namespace ge