Bugfix: support unknown control op subgraph

tests/ut/ge/hybrid/ge_hybrid_unittest.cc

@@ -260,11 +260,6 @@ TEST_F(UtestGeHybrid, hybrid_model_executor) {
 TEST_F(UtestGeHybrid, unfold_subgraphs_success) {
   ComputeGraphPtr merged_graph = nullptr;
 
-  ComputeGraphPtr sub_graph = std::make_shared<ComputeGraph>("sub_graph");
-  OpDescPtr sub_graph_while_op_desc = CreateOpDesc("while", WHILE);
-  NodePtr sub_graph_while_node = sub_graph->AddNode(sub_graph_while_op_desc);
-  sub_graph->SetGraphUnknownFlag(true);
-
   ComputeGraphPtr sub_sub_graph1 = std::make_shared<ComputeGraph>("while_cond");
   OpDescPtr sub_sub_graph_while_cond_data_op_desc = CreateOpDesc("cond_data", DATA);
   NodePtr sub_sub_graph_while_cond_data_node = sub_sub_graph1->AddNode(sub_sub_graph_while_cond_data_op_desc);
@@ -279,6 +274,13 @@ TEST_F(UtestGeHybrid, unfold_subgraphs_success) {
   sub_sub_graph_while_body_add_node->AddLinkFrom(sub_sub_graph_while_body_data_node);
   sub_sub_graph_while_body_add_node->AddLinkFrom(sub_sub_graph_while_body_const_node);
 
+  ComputeGraphPtr sub_graph = std::make_shared<ComputeGraph>("sub_graph");
+  OpDescPtr sub_graph_while_op_desc = CreateOpDesc("while", WHILE);
+  NodePtr sub_graph_while_node = sub_graph->AddNode(sub_graph_while_op_desc);
+  sub_graph->SetGraphUnknownFlag(true);
+  sub_graph_while_node->GetOpDesc()->SetSubgraphInstanceName(0, "while_cond");
+  sub_graph_while_node->GetOpDesc()->SetSubgraphInstanceName(1, "while_body");
+
   ComputeGraphPtr root_graph = std::make_shared<ComputeGraph>("root_graph");
   auto partitioned_call_op_desc = MakeShared<OpDesc>("partitioned_call", PARTITIONEDCALL);
   auto partitioned_call_node = root_graph->AddNode(partitioned_call_op_desc);