Add 'Create' method for api::FuncGraph

mindspore/core/api/ir/func_graph.h

@@ -48,6 +48,8 @@ class MS_CORE_API FuncGraph {
   virtual FuncGraphManagerPtr get_manager() const = 0;
 
   static std::vector<AnfNodePtr> TopoSort(const AnfNodePtr &node);
+
+  static FuncGraphPtr Create();
 };
 }  // namespace mindspore::api
 #endif  // MINDSPORE_CORE_API_IR_FUNC_GRAPH_H_

mindspore/core/ir/func_graph.cc

@@ -743,5 +743,8 @@ size_t NewFgSeenGeneration() {
 // Implement TopoSort api.
 std::vector<AnfNodePtr> api::FuncGraph::TopoSort(const AnfNodePtr &node) { return mindspore::TopoSort(node); }
 
+// Create an api::FuncGraph instance.
+api::FuncGraphPtr api::FuncGraph::Create() { return std::make_shared<mindspore::FuncGraph>(); }
+
 const PrimitivePtr FuncGraphTransform::func_graph_prim_ = std::make_shared<Primitive>("FuncGraph");
 }  // namespace mindspore