Fix serializer so it can serialize PP BERT large (#4127) (#4137)

Co-authored-by: Scott Cyphers <diyessi@users.noreply.github.com>
Co-authored-by: Scott Cyphers <diyessi@users.noreply.github.com>

src/ngraph/serializer.cpp

@@ -114,7 +114,6 @@ public:
     json serialize_output(const Output<Node>& output);
     json serialize_parameter_vector(const ParameterVector& parameters);
     json serialize_output_vector(const OutputVector& output_vector);
-    json serialize_node_reference(const Node& node);
     json serialize_node(const Node& node);
     json serialize_axis_set(const AxisSet& axis_set);
     json serialize_tensor_iterator_input_description(
@@ -127,8 +126,6 @@ protected:
     bool m_serialize_output_shapes{false};
     bool m_binary_constant_data{false};
     json m_json_nodes;
-    set<const Node*> m_nodes_serialized;
-    queue<const Node*> m_nodes_to_serialize;
 };
 
 class JSONDeserializer
@@ -444,7 +441,7 @@ json JSONSerializer::serialize_parameter_vector(const ParameterVector& parameter
     json json_parameters = json::array();
     for (auto param : parameters)
     {
-        json_parameters.push_back(serialize_node_reference(*param));
+        json_parameters.push_back(param->get_name());
     }
     return json_parameters;
 }
@@ -458,9 +455,16 @@ json JSONSerializer::serialize_function(const Function& f)
     // TODO Functions can return multiple results
     for (size_t i = 0; i < f.get_output_size(); ++i)
     {
-        function["result"].push_back(serialize_node_reference(*f.get_output_op(i)));
+        function["result"].push_back(f.get_output_op(i)->get_name());
     }
-    function["ops"] = m_json_nodes;
+
+    json nodes;
+    for (shared_ptr<Node> node : f.get_ordered_ops(true))
+    {
+        nodes.push_back(serialize_node(*node));
+    }
+
+    function["ops"] = nodes;
     return function;
 }
 
@@ -2996,36 +3000,11 @@ shared_ptr<Node> JSONDeserializer::deserialize_node(json node_js)
     return node;
 }
 
-json JSONSerializer::serialize_node_reference(const Node& n)
-{
-    if (m_nodes_serialized.count(&n) != 1)
-    {
-        m_nodes_to_serialize.push(&n);
-        if (m_nodes_to_serialize.size() == 1)
-        {
-            // Nothing in the queue
-            stack<json> serialized_nodes;
-            while (!m_nodes_to_serialize.empty())
-            {
-                const Node* next_node = m_nodes_to_serialize.front();
-                m_nodes_to_serialize.pop();
-                serialized_nodes.push(serialize_node(*next_node));
-            }
-            while (serialized_nodes.size() > 0)
-            {
-                m_json_nodes.push_back(serialized_nodes.top());
-                serialized_nodes.pop();
-            }
-        }
-    }
-    return n.get_name();
-}
-
 json JSONSerializer::serialize_output(const Output<Node>& output)
 {
     json result;
     auto index = output.get_index();
-    json json_node_reference = serialize_node_reference(*output.get_node());
+    json json_node_reference = output.get_node()->get_name();
     if (index == 0)
     {
         result = json_node_reference;
@@ -3050,7 +3029,6 @@ json JSONSerializer::serialize_output_vector(const OutputVector& output_vector)
 
 json JSONSerializer::serialize_node(const Node& n)
 {
-    m_nodes_serialized.insert(&n);
     const NodeTypeInfo& type_info = n.get_type_info();
     json jtype_info;
     jtype_info["name"] = type_info.name;
@@ -3077,7 +3055,7 @@ json JSONSerializer::serialize_node(const Node& n)
     }
     for (auto cdep : n.get_control_dependencies())
     {
-        control_deps.push_back(serialize_node_reference(*cdep));
+        control_deps.push_back(cdep->get_name());
     }
     for (auto& output : n.outputs())
     {