develop mindir load and run

mindspore/ccsrc/pipeline/jit/action.cc

@@ -66,6 +66,10 @@ abstract::AnalysisResult AbstractAnalyze(const ResourcePtr &res, const FuncGraph
     for (auto &node : manager->all_nodes()) {
       MS_EXCEPTION_IF_NULL(node);
       const AbstractBasePtr &prev_inferred = node->abstract();
+      // Keep previous inferred value for CNode if is loaded from MindIR.
+      if (node->isa<CNode>() && node->cast<CNodePtr>()->get_load_flag()) {
+        continue;
+      }
       // Keep previous inferred value for ValueNode if the inferred value is not AbstractFunction.
       if (!node->isa<ValueNode>() || (prev_inferred != nullptr && prev_inferred->isa<abstract::AbstractFunction>())) {
         node->set_abstract(nullptr);
@@ -113,6 +117,69 @@ FuncGraphPtr Renormalize(const ResourcePtr &res, const FuncGraphPtr &func_graph,
   return ret;
 }
 
+const FuncGraphPtr GetLoadedGraph(const ResourcePtr &res) {
+  MS_EXCEPTION_IF_NULL(res);
+  auto manager = res->manager();
+  MS_EXCEPTION_IF_NULL(manager);
+  FuncGraphPtr loaded_graph = nullptr;
+  size_t loaded_graph_num = 0;
+  auto all_graphs = manager->func_graphs();
+  for (auto &graph : all_graphs) {
+    MS_EXCEPTION_IF_NULL(graph);
+    if (graph->has_attr("is_load")) {
+      loaded_graph = graph;
+      loaded_graph_num += 1;
+    }
+  }
+  if (loaded_graph_num == 0) {
+    return nullptr;
+  }
+  if (loaded_graph_num == 1) {
+    return loaded_graph;
+  }
+  MS_LOG(EXCEPTION) << "The loaded sub graph currently should less than 2, but got " << loaded_graph_num;
+}
+
+void CheckRootInputShapeAndType(const ResourcePtr &res, const FuncGraphPtr &loaded_graph) {
+  MS_EXCEPTION_IF_NULL(res);
+  auto manager = res->manager();
+  MS_EXCEPTION_IF_NULL(manager);
+  FuncGraphPtr root_graph = *(manager->roots().begin());
+  auto root_inputs = root_graph->get_inputs();
+  auto loaded_inputs = loaded_graph->get_inputs();
+
+  size_t root_inputs_num = root_inputs.size();
+  size_t loaded_inputs_num = loaded_inputs.size();
+  if (root_inputs_num != loaded_inputs_num) {
+    MS_LOG(EXCEPTION) << "The inputs number " << root_inputs_num << " not equal to the inputs number of loaded graph "
+                      << loaded_inputs_num;
+  }
+  for (size_t index = 0; index < root_inputs_num; index++) {
+    auto root_input = root_inputs[index];
+    auto loaded_input = loaded_inputs[index];
+
+    auto root_shape = root_input->Shape() == nullptr ? nullptr : dyn_cast<abstract::Shape>(root_input->Shape());
+    auto loaded_shape = loaded_input->Shape() == nullptr ? nullptr : dyn_cast<abstract::Shape>(loaded_input->Shape());
+    auto root_type = root_input->Type() == nullptr ? nullptr : dyn_cast<Type>(root_input->Type());
+    auto loaded_type = loaded_input->Type() == nullptr ? nullptr : dyn_cast<Type>(loaded_input->Type());
+    MS_EXCEPTION_IF_NULL(root_shape);
+    MS_EXCEPTION_IF_NULL(loaded_shape);
+    MS_EXCEPTION_IF_NULL(root_type);
+    MS_EXCEPTION_IF_NULL(loaded_type);
+
+    if (root_shape->shape() != loaded_shape->shape()) {
+      MS_EXCEPTION(ValueError) << "The " << index
+                               << " th input shape differ from loaded graph. Input shape: " << root_shape->ToString()
+                               << ", input shape of loaded graph: " << loaded_shape->ToString();
+    }
+    if (root_type->type_id() != loaded_type->type_id()) {
+      MS_EXCEPTION(TypeError) << "The " << std::to_string(index)
+                              << " th input type differ from loaded graph. Input type: " << root_type->ToString()
+                              << ", input type of loaded graph: " << loaded_type->ToString();
+    }
+  }
+}
+
 bool ParseAction(const ResourcePtr &res) {
   if (!res->input()) {
     MS_LOG(EXCEPTION) << "Parse error";
@@ -255,12 +322,14 @@ bool AbstractSpecializeAction(const ResourcePtr &res) {
   if (res->func_graph() == nullptr) {
     MS_LOG(EXCEPTION) << "AbstractSpecialize error";
   }
-
   FuncGraphPtr func_graph = res->func_graph();
   abstract::AbstractBasePtrList args_spec = res->args_spec();
   auto context = parallel::ParallelContext::GetInstance();
   MS_EXCEPTION_IF_NULL(parallel::ParallelContext::GetInstance());
   context->ParallelParameterContextInitShape(func_graph);
+
+  // get original loaded graph to check inputs later
+  auto loaded_graph_ptr = GetLoadedGraph(res);
   // suppose that there is not KeywordArgument for the top graph
   // get the hyper parameter
   for (const auto &param : func_graph->parameters()) {
@@ -294,7 +363,10 @@ bool AbstractSpecializeAction(const ResourcePtr &res) {
       }
     }
   }
-
+  // check input after abstract when there is a loaded graph
+  if (loaded_graph_ptr != nullptr) {
+    CheckRootInputShapeAndType(res, loaded_graph_ptr);
+  }
   MS_LOG(DEBUG) << "End graph: " << new_fg->ToString() << ", return: " << new_fg->get_return()->DebugString(true);
   return true;
 }

mindspore/ccsrc/pipeline/jit/init.cc

@@ -111,6 +111,7 @@ PYBIND11_MODULE(_c_expression, m) {
   (void)m.def("init_pipeline", &mindspore::pipeline::InitPipeline, "Init Pipeline.");
 
   (void)m.def("export_graph", &mindspore::pipeline::ExportGraph, "Export Graph.");
+  (py::object) m.def("load_mindir", &mindspore::pipeline::LoadMindIR, py::arg("file_name"), "Load model as Graph.");
 
   (void)py::class_<mindspore::MpiConfig, std::shared_ptr<mindspore::MpiConfig>>(m, "MpiConfig")
     .def_static("get_instance", &mindspore::MpiConfig::GetInstance, "Get mpi config instance.")

mindspore/ccsrc/pipeline/jit/parse/data_converter.cc

@@ -203,6 +203,19 @@ bool ConvertMetaFuncGraph(const py::object &obj, ValuePtr *const data, bool use_
   return true;
 }
 
+bool ConvertFuncGraph(const py::object &obj, ValuePtr *const data) {
+  MS_LOG(DEBUG) << "Converting FuncGraph object";
+  auto func_graph = obj.cast<FuncGraphPtr>();
+  if (func_graph == nullptr) {
+    MS_LOG(ERROR) << "Resolve FuncGraph error, get ptr is null";
+    return false;
+  }
+  auto new_fg = BasicClone(func_graph);
+  new_fg->set_attr("is_load", MakeValue(true));
+  *data = new_fg;
+  return true;
+}
+
 bool ConvertSlice(const py::object &obj, ValuePtr *const data) {
   MS_LOG(DEBUG) << "Converting slice object";
 
@@ -368,47 +381,21 @@ bool ConvertFloatWithType(const float &obj, ValuePtr *const data, TypePtr dtype
 }
 }  // namespace
 
-bool ConvertData(const py::object &obj, ValuePtr *const data, bool use_signature, TypePtr dtype) {
-  // check parameter valid
-  if (data == nullptr) {
-    MS_LOG(ERROR) << "Data is null pointer";
-    return false;
-  }
-
-  bool ret = true;
+bool ConvertSingleData(const py::object &obj, ValuePtr *const data) {
+  MS_EXCEPTION_IF_NULL(data);
   ValuePtr converted = nullptr;
   if (py::isinstance<py::none>(obj)) {
     converted = kNone;
   } else if (py::isinstance<py::bool_>(obj)) {
     converted = std::make_shared<BoolImm>(py::cast<bool>(obj));
-  } else if (py::isinstance<py::int_>(obj)) {
-    ret = ConvertIntegerWithType(py::cast<int64_t>(obj), &converted, dtype);
-  } else if (py::isinstance<py::float_>(obj)) {
-    ret = ConvertFloatWithType(py::cast<float>(obj), &converted, dtype);
   } else if (py::isinstance<py::str>(obj)) {
     converted = std::make_shared<StringImm>(py::cast<std::string>(obj));
-  } else if (py::isinstance<py::dict>(obj)) {
-    ret = ConvertDict(obj, &converted, use_signature);
-  } else if (py::isinstance<py::slice>(obj)) {
-    ret = ConvertSlice(obj, &converted);
   } else if (py::isinstance<py::ellipsis>(obj)) {
     converted = kEllipsis;
-  } else if (py::isinstance<py::tuple>(obj)) {
-    ret = ConvertTuple(obj, &converted, use_signature);
-  } else if (py::hasattr(obj, PYTHON_CELL_AS_LIST)) {
-    ret = ConvertCellList(obj, &converted, use_signature);
-  } else if (py::isinstance<Cell>(obj)) {
-    return ConvertCellObjToFuncGraph(obj.cast<CellPtr>(), data);
-  } else if (py::isinstance<py::list>(obj)) {
-    ret = ConvertList(obj, &converted, use_signature);
   } else if (py::isinstance<py::module>(obj)) {
     ConvertNameSpace(obj, &converted);
   } else if (py::hasattr(obj, PYTHON_DATACLASS_FIELDS)) {
     ConvertDataClass(obj, &converted);
-  } else if (py::hasattr(obj, PYTHON_PRIMITIVE_FLAG)) {
-    ret = ConvertPrimitive(obj, &converted, use_signature);
-  } else if (py::isinstance<MetaFuncGraph>(obj)) {
-    ret = ConvertMetaFuncGraph(obj, &converted, use_signature);
   } else if (py::isinstance<Type>(obj)) {
     converted = obj.cast<TypePtr>();
   } else if (py::isinstance<Tensor>(obj)) {
@@ -425,9 +412,50 @@ bool ConvertData(const py::object &obj, ValuePtr *const data, bool use_signature
   } else if (py::hasattr(obj, PYTHON_CLASS_MEMBER_NAMESPACE)) {
     converted = std::make_shared<NameSpace>(RESOLVE_NAMESPACE_NAME_CLASS_MEMBER, obj);
   } else {
-    ret = ConvertOtherObj(obj, &converted);
+    return false;
+  }
+  *data = converted;
+  return true;
+}
+
+bool ConvertData(const py::object &obj, ValuePtr *const data, bool use_signature, TypePtr dtype) {
+  // check parameter valid
+  if (data == nullptr) {
+    MS_LOG(ERROR) << "Data is null pointer";
+    return false;
   }
 
+  ValuePtr converted = nullptr;
+  bool ret = ConvertSingleData(obj, &converted);
+  if (ret) {
+    *data = converted;
+    return true;
+  }
+  if (py::isinstance<py::int_>(obj)) {
+    ret = ConvertIntegerWithType(py::cast<int64_t>(obj), &converted, dtype);
+  } else if (py::isinstance<py::float_>(obj)) {
+    ret = ConvertFloatWithType(py::cast<float>(obj), &converted, dtype);
+  } else if (py::isinstance<py::dict>(obj)) {
+    ret = ConvertDict(obj, &converted, use_signature);
+  } else if (py::isinstance<py::slice>(obj)) {
+    ret = ConvertSlice(obj, &converted);
+  } else if (py::isinstance<py::tuple>(obj)) {
+    ret = ConvertTuple(obj, &converted, use_signature);
+  } else if (py::hasattr(obj, PYTHON_CELL_AS_LIST)) {
+    ret = ConvertCellList(obj, &converted, use_signature);
+  } else if (py::isinstance<Cell>(obj)) {
+    return ConvertCellObjToFuncGraph(obj.cast<CellPtr>(), data);
+  } else if (py::isinstance<py::list>(obj)) {
+    ret = ConvertList(obj, &converted, use_signature);
+  } else if (py::hasattr(obj, PYTHON_PRIMITIVE_FLAG)) {
+    ret = ConvertPrimitive(obj, &converted, use_signature);
+  } else if (py::isinstance<MetaFuncGraph>(obj)) {
+    ret = ConvertMetaFuncGraph(obj, &converted, use_signature);
+  } else if (py::isinstance<FuncGraph>(obj)) {
+    ret = ConvertFuncGraph(obj, &converted);
+  } else {
+    ret = ConvertOtherObj(obj, &converted);
+  }
   *data = converted;
   return ret;
 }

mindspore/ccsrc/pipeline/jit/parse/resolve.cc

@@ -113,6 +113,49 @@ AnfNodePtr ResolveParameterObj(const FuncGraphPtr &func_graph, const py::object
   return para_node;
 }
 
+void BroadenCNodeAbstract(const FuncGraphPtr &func_graph) {
+  std::vector<AnfNodePtr> nodes = TopoSort(func_graph->get_return(), SuccIncoming, AlwaysInclude);
+  for (const AnfNodePtr &node : nodes) {
+    if (!node->isa<CNode>()) {
+      continue;
+    }
+    auto abstract = node->abstract();
+    if (abstract != nullptr) {
+      node->set_abstract(abstract->Broaden());
+    }
+  }
+}
+
+void ConvertLoadedGraph(const FuncGraphPtr &func_graph, const ValuePtr &value) {
+  if (!value->isa<FuncGraph>()) {
+    return;
+  }
+  auto resolved_graph = value->cast<FuncGraphPtr>();
+  MS_EXCEPTION_IF_NULL(resolved_graph);
+  if (!resolved_graph->has_attr("is_load")) {
+    return;
+  }
+  auto top_graph = Parser::GetTopFuncGraph();
+  std::vector<AnfNodePtr> input_params;
+  for (auto const &param : resolved_graph->parameters()) {
+    auto param_ptr = dyn_cast<Parameter>(param);
+    MS_EXCEPTION_IF_NULL(param_ptr);
+    if (param_ptr->has_default()) {
+      param_ptr->set_func_graph(top_graph);
+      func_graph->add_used_global_parameters(param_ptr);
+
+      // update top_graph
+      top_graph->add_parameter(param_ptr);
+      size_t hyper_param_count = top_graph->hyper_param_count();
+      top_graph->set_hyper_param_count(hyper_param_count + 1);
+    } else {
+      input_params.push_back(param_ptr);
+    }
+  }
+  resolved_graph->set_parameters(input_params);
+  BroadenCNodeAbstract(resolved_graph);
+}
+
 bool ResolveObjectToNode(const FuncGraphPtr &func_graph, const py::object &obj, AnfNodePtr *const node) {
   AnfNodePtr output = nullptr;
   if (py::hasattr(obj, "__parameter__") && py::isinstance<tensor::MetaTensor>(obj)) {
@@ -146,6 +189,7 @@ bool ResolveObjectToNode(const FuncGraphPtr &func_graph, const py::object &obj,
       return false;
     }
     MS_EXCEPTION_IF_NULL(convert_result);
+    ConvertLoadedGraph(func_graph, convert_result);
     output = NewValueNode(convert_result);
     if (convert_result->isa<tensor::Tensor>()) {
       output = GetMixedPrecisionCastHelp(func_graph, output);

mindspore/ccsrc/pipeline/jit/pipeline.cc

@@ -48,6 +48,7 @@
 #include "pybind_api/pybind_patch.h"
 #include "utils/shape_utils.h"
 #include "utils/info.h"
+#include "load_mindir/load_model.h"
 #if (ENABLE_CPU && (ENABLE_D || ENABLE_GPU))
 #include "ps/constants.h"
 #include "ps/util.h"
@@ -1096,6 +1097,8 @@ void ExportGraph(const std::string &file_name, const std::string &, const std::s
 #endif
 }
 
+FuncGraphPtr LoadMindIR(const std::string &file_name) { return mindspore::LoadMindIR(file_name); }
+
 void ReleaseGeTsd() {
   auto context_ptr = MsContext::GetInstance();
   if (context_ptr != nullptr) {

mindspore/ccsrc/pipeline/jit/pipeline.h

@@ -140,6 +140,7 @@ void ClearResAtexit();
 void ReleaseGeTsd();
 
 void ExportGraph(const std::string &file_name, const std::string &, const std::string &phase);
+FuncGraphPtr LoadMindIR(const std::string &file_name);
 
 // init and exec dataset sub graph
 bool InitExecDataset(const std::string &queue_name, int64_t iter_num, int64_t batch_size,

mindspore/ccsrc/pipeline/jit/validator.cc

@@ -51,6 +51,9 @@ void ValidateOperation(const AnfNodePtr &node) {
   if (abstract::IsInWhiteList(prim)) {
     return;
   }
+  if (prim->HasAttr("is_load")) {
+    return;
+  }
   if (prim->HasPyEvaluator()) {
     MS_LOG(DEBUG) << "Primitive " << prim->name() << " has python evaluator.";
     return;

mindspore/core/ir/anf.h

@@ -273,6 +273,9 @@ class CNode : public AnfNode, public EffectInfoHolder {
   void set_in_forward_flag(bool flag) { in_forward_flag_ = flag; }
   bool in_forward_flag() const { return in_forward_flag_; }
 
+  void set_load_flag(bool is_load) { is_load_ = is_load; }
+  bool get_load_flag() { return is_load_; }
+
   VarPtr func_graph_as_var() const { return func_graph_as_var_; }
 
   const std::unordered_map<std::string, ValuePtr> &attrs() const { return attrs_; }
@@ -304,6 +307,7 @@ class CNode : public AnfNode, public EffectInfoHolder {
   bool stop_gradient_;
   bool in_forward_flag_ = false;
   bool effect_handled_ = false;
+  bool is_load_ = false;
   // inputs_value_ store cnode input value and id in pynative mode
   // output_value_ store cnode value and id in pynative mode
   std::vector<std::pair<ValuePtr, std::string>> inputs_value_;

mindspore/core/ir/func_graph.cc

@@ -68,6 +68,18 @@ AnfNodePtr FuncGraph::output() const {
   }
 }
 
+const std::vector<AnfNodePtr> FuncGraph::get_inputs() const {
+  std::vector<AnfNodePtr> input_params;
+  for (auto const &node : parameters_) {
+    MS_EXCEPTION_IF_NULL(node);
+    auto parameter = dyn_cast<Parameter>(node);
+    if (!parameter->has_default()) {
+      input_params.push_back(parameter);
+    }
+  }
+  return input_params;
+}
+
 ParameterPtr FuncGraph::add_parameter() {
   FuncGraphPtr this_func_graph = shared_from_base<FuncGraph>();
   ParameterPtr p = std::make_shared<Parameter>(this_func_graph);

mindspore/core/ir/func_graph.h

@@ -160,6 +160,8 @@ class FuncGraph : public FuncGraphBase, public EffectInfoHolder {
   abstract::AbstractFunctionPtr abstract();
   abstract::AbstractBasePtr ToAbstract() override;
 
+  // get function graph inputs, but parameters
+  const std::vector<AnfNodePtr> get_inputs() const;
   // Return the graph's output, or nullptr if not yet deduced.
   AnfNodePtr output() const;
   void set_output(const AnfNodePtr &value, bool force_new_ret = false);

mindspore/core/ir/func_graph_cloner.cc

@@ -91,6 +91,7 @@ void Cloner::CloneCNode(const AnfNodePtr &node, const FuncGraphPtr &target) {
   new_node->set_forward(old_node->forward().first, old_node->forward().second);
   new_node->set_inputs_value(old_node->inputs_value());
   new_node->set_attrs(old_node->attrs());
+  new_node->set_load_flag(old_node->get_load_flag());
   ScopePtr scope = (node->scope() != kDefaultScope) ? node->scope() : this->scope();
   new_node->set_scope(scope);
   new_node->CloneUserData(old_node);

mindspore/core/load_mindir/anf_model_parser.cc

@@ -228,17 +228,14 @@ tensor::TensorPtr MSANFModelParser::BuildTensorInfoForFuncGraph(const mind_ir::T
   }
 
   if (!tensor_proto.has_data_type()) {
-    MS_LOG(ERROR) << "mind_ir TensorProto has no data_type or name!";
-    return nullptr;
+    MS_LOG(EXCEPTION) << "mind_ir TensorProto has no data_type or name!";
   }
   if (kDefaultValueSwitchMap.find(tensor_proto.data_type()) == kDefaultValueSwitchMap.end()) {
-    MS_LOG(ERROR) << "mind_ir TensorProto data_type is not support yet!";
-    return nullptr;
+    MS_LOG(EXCEPTION) << "mind_ir TensorProto data_type is not support yet!";
   }
 
   tensor::TensorPtr tensor_info =
     std::make_shared<tensor::Tensor>(kDefaultValueSwitchMap[tensor_proto.data_type()], shape);
-  MS_EXCEPTION_IF_NULL(tensor_info);
   return tensor_info;
 }
 
@@ -253,9 +250,14 @@ bool MSANFModelParser::BuildParameterForFuncGraph(const ParameterPtr &node,
   string debug_info_name = ParseParameterName(parameter_proto.name());
   auto debug_info_ptr = std::make_shared<NodeDebugInfo>(debug_info_name);
   node->set_debug_info(debug_info_ptr);
-  node->set_name(parameter_proto.name());
+  node->set_name(debug_info_name);
 
   tensor::TensorPtr tensor_info = BuildTensorInfoForFuncGraph(parameter_proto);
+  MS_EXCEPTION_IF_NULL(tensor_info);
+  ParamInfoPtr param_info = std::make_shared<ParamInfo>();
+  param_info->set_name(debug_info_name);
+  tensor_info->set_param_info(param_info);
+
   auto tensor_abstract = tensor_info->ToAbstract();
   MS_EXCEPTION_IF_NULL(tensor_abstract);
   node->set_abstract(tensor_abstract);
@@ -284,13 +286,13 @@ bool MSANFModelParser::BuildInputForFuncGraph(const ParameterPtr &node, const mi
   string debug_info_name = ParseParameterName(value_proto.name());
   auto debug_info_ptr = std::make_shared<NodeDebugInfo>(debug_info_name);
   node->set_debug_info(debug_info_ptr);
-  node->set_name(value_proto.name());
+  node->set_name(debug_info_name);
 
   const mind_ir::TensorProto &tensor_proto = value_proto.tensor(0);
 
   tensor::TensorPtr tensor_info = BuildTensorInfoForFuncGraph(tensor_proto);
+  MS_EXCEPTION_IF_NULL(tensor_info);
   auto tensor_abstract = tensor_info->ToAbstract();
-  MS_EXCEPTION_IF_NULL(tensor_abstract);
   node->set_abstract(tensor_abstract);
 
   anfnode_build_map_[value_proto.name()] = node;
@@ -300,15 +302,6 @@ bool MSANFModelParser::BuildInputForFuncGraph(const ParameterPtr &node, const mi
 bool MSANFModelParser::ImportParametersForGraph(const FuncGraphPtr &outputFuncGraph,
                                                 const mind_ir::GraphProto &importProto) {
   MS_EXCEPTION_IF_NULL(outputFuncGraph);
-  MS_LOG(INFO) << "All Parameters size is: " << importProto.parameter_size();
-  for (int i = 0; i < importProto.parameter_size(); ++i) {
-    const mind_ir::TensorProto &parameter_proto = importProto.parameter(i);
-    if (!BuildParameterForFuncGraph(outputFuncGraph->add_parameter(), parameter_proto)) {
-      MS_LOG(ERROR) << "Build parameter for funcgraph fail at index: " << i;
-      return false;
-    }
-  }
-
   MS_LOG(INFO) << "All inputs size is: " << importProto.input_size();
   for (int i = 0; i < importProto.input_size(); ++i) {
     const mind_ir::ValueInfoProto &input_proto = importProto.input(i);
@@ -317,6 +310,15 @@ bool MSANFModelParser::ImportParametersForGraph(const FuncGraphPtr &outputFuncGr
       return false;
     }
   }
+
+  MS_LOG(INFO) << "All Parameters size is: " << importProto.parameter_size();
+  for (int i = 0; i < importProto.parameter_size(); ++i) {
+    const mind_ir::TensorProto &parameter_proto = importProto.parameter(i);
+    if (!BuildParameterForFuncGraph(outputFuncGraph->add_parameter(), parameter_proto)) {
+      MS_LOG(ERROR) << "Build parameter for funcgraph fail at index: " << i;
+      return false;
+    }
+  }
   return true;
 }
 
@@ -745,7 +747,7 @@ CNodePtr MSANFModelParser::BuildCNodeForFuncGraph(const FuncGraphPtr &outputFunc
 
     inputs.push_back(anfnode_build_map_[input_name]);
   }
-
+  prim->set_attr("is_load", MakeValue(true));
   auto cnode_ptr = outputFuncGraph->NewCNode(prim, inputs);
   MS_EXCEPTION_IF_NULL(cnode_ptr);
 
@@ -777,6 +779,7 @@ CNodePtr MSANFModelParser::BuildCNodeForFuncGraph(const FuncGraphPtr &outputFunc
   auto debug_info_ptr = std::make_shared<NodeDebugInfo>(debug_info_name);
   cnode_ptr->set_debug_info(debug_info_ptr);
   cnode_ptr->set_fullname_with_scope(fullname_with_scope);
+  cnode_ptr->set_load_flag(true);
 
   anfnode_build_map_[node_name] = cnode_ptr;
   return cnode_ptr;
@@ -804,6 +807,7 @@ bool MSANFModelParser::BuildReturnForFuncGraph(const FuncGraphPtr &outputFuncGra
     inputs.push_back(maketuple_ptr);
     auto return_node = outputFuncGraph->NewCNode(inputs);
     MS_EXCEPTION_IF_NULL(return_node);
+    return_node->set_load_flag(true);
     outputFuncGraph->set_return(return_node);
     MS_LOG(INFO) << "Construct funcgraph finined, all success.";
   } else {
@@ -812,6 +816,7 @@ bool MSANFModelParser::BuildReturnForFuncGraph(const FuncGraphPtr &outputFuncGra
     inputs.push_back(cnode_ptr);
     auto return_node = outputFuncGraph->NewCNode(inputs);
     MS_EXCEPTION_IF_NULL(return_node);
+    return_node->set_load_flag(true);
     outputFuncGraph->set_return(return_node);
     MS_LOG(INFO) << "Construct funcgraph finined, all success!";
   }

mindspore/nn/__init__.py

@@ -20,7 +20,7 @@ Pre-defined building blocks or computing units to construct neural networks.
 from . import layer, loss, optim, metrics, wrap, probability, sparse, dynamic_lr
 from .learning_rate_schedule import *
 from .dynamic_lr import *
-from .cell import Cell, GraphKernel
+from .cell import Cell, GraphKernel, GraphCell
 from .layer import *
 from .loss import *
 from .optim import *
@@ -29,7 +29,7 @@ from .wrap import *
 from .sparse import *
 
 
-__all__ = ["Cell", "GraphKernel"]
+__all__ = ["Cell", "GraphKernel", "GraphCell"]
 __all__.extend(layer.__all__)
 __all__.extend(loss.__all__)
 __all__.extend(optim.__all__)

mindspore/nn/cell.py

@@ -25,7 +25,7 @@ from mindspore import log as logger
 from mindspore.common.parameter import PARAMETER_NAME_DEFAULT
 from mindspore.context import ParallelMode
 from .. import context
-from .._c_expression import init_pipeline, Cell_
+from .._c_expression import init_pipeline, Cell_, FuncGraph
 from .._checkparam import Validator
 from ..common import dtype as mstype
 from ..common.api import _executor, _pynative_exec
@@ -1191,3 +1191,39 @@ class GraphKernel(Cell):
 
     def construct(self):
         raise NotImplementedError
+
+
+class GraphCell(Cell):
+    """
+    Base class for running the graph loaded from a MindIR.
+
+    This feature is still under development. Currently `GraphCell` do not support modifying the structure of the
+    diagram, and can only use data that shape and type are the same as the input when exporting the MindIR.
+
+    Args:
+        graph (object): A compiled graph loaded from MindIR.
+
+    Examples:
+        >>> import numpy as np
+        >>> import mindspore.nn as nn
+        >>> from mindspore import Tensor
+        >>> from mindspore.train import export, load
+        >>>
+        >>> net = nn.Conv2d(1, 1, kernel_size=3)
+        >>> input = Tensor(np.ones([1, 1, 3, 3]).astype(np.float32))
+        >>> export(net, input, file_name="net", file_format="MINDIR")
+        >>> graph = load("net.mindir")
+        >>> net = nn.GraphCell(graph)
+        >>> output = net(input)
+    """
+    def __init__(self, graph):
+        super(GraphCell, self).__init__(auto_prefix=True)
+        if not isinstance(graph, FuncGraph):
+            raise TypeError(f"graph must be a FuncGraph loaded from MindIR, but got {type(graph)}.")
+        self.graph = graph
+
+    def construct(self, *inputs):
+        return self.graph(*inputs)
+
+    def __call__(self, *inputs):
+        return self.compile_and_run(*inputs)

mindspore/train/__init__.py

@@ -22,10 +22,10 @@ from .dataset_helper import DatasetHelper, connect_network_with_dataset
 from . import amp
 from .amp import build_train_network
 from .loss_scale_manager import LossScaleManager, FixedLossScaleManager, DynamicLossScaleManager
-from .serialization import save_checkpoint, load_checkpoint, load_param_into_net, export, parse_print,\
+from .serialization import save_checkpoint, load_checkpoint, load_param_into_net, export, load, parse_print,\
     build_searched_strategy, merge_sliced_parameter, load_distributed_checkpoint
 
 __all__ = ["Model", "DatasetHelper", "amp", "connect_network_with_dataset", "build_train_network", "LossScaleManager",
            "FixedLossScaleManager", "DynamicLossScaleManager", "save_checkpoint", "load_checkpoint",
-           "load_param_into_net", "export", "parse_print", "build_searched_strategy", "merge_sliced_parameter",
+           "load_param_into_net", "export", "load", "parse_print", "build_searched_strategy", "merge_sliced_parameter",
            "load_distributed_checkpoint"]

mindspore/train/model.py

@@ -139,10 +139,22 @@ class Model:
         self._global_rank = _get_global_rank()
         self._parameter_broadcast = _get_parameter_broadcast()
 
+        self._check_for_graph_cell(kwargs)
         self._train_network = self._build_train_network()
         self._build_eval_network(metrics, eval_network, eval_indexes)
         self._build_predict_network()
 
+    def _check_for_graph_cell(self, kwargs):
+        if not isinstance(self._network, nn.GraphCell):
+            return
+        if self._amp_level != "O0":
+            logger.warning("amp_level will not work when network is a GraphCell.")
+
+        if self._loss_fn is not None or self._optimizer is not None:
+            raise ValueError("Currently loss_fn and optimizer should be None when network is a GraphCell. ")
+        if kwargs:
+            raise ValueError("Currently kwargs should be empty when network is a GraphCell. ")
+
     def _process_amp_args(self, kwargs):
         if self._amp_level in ["O0", "O3"]:
             self._keep_bn_fp32 = False
@@ -586,6 +598,8 @@ class Model:
             >>> model.train(2, dataset)
         """
         dataset_sink_mode = Validator.check_bool(dataset_sink_mode)
+        if isinstance(self._train_network, nn.GraphCell) and dataset_sink_mode is True:
+            raise ValueError("Sink mode is currently not supported when training with a GraphCell.")
         Validator.check_is_int(sink_size)
         dataset_size = train_dataset.get_dataset_size()
         if dataset_size == 0:
@@ -704,9 +718,12 @@ class Model:
             >>> acc = model.eval(dataset, dataset_sink_mode=False)
         """
         dataset_sink_mode = Validator.check_bool(dataset_sink_mode)
+
         _device_number_check(self._parallel_mode, self._device_number)
         if not self._metric_fns:
             raise ValueError("metric fn can not be None or empty.")
+        if isinstance(self._eval_network, nn.GraphCell) and dataset_sink_mode is True:
+            raise ValueError("Sink mode is currently not supported when evaluating with a GraphCell.")
 
         cb_params = _InternalCallbackParam()
         cb_params.eval_network = self._eval_network

mindspore/train/serialization.py

@@ -38,6 +38,7 @@ from mindspore._checkparam import check_input_data, Validator
 from mindspore.compression.export import quant_export
 from mindspore.parallel._tensor import _load_tensor
 from mindspore.parallel._utils import _infer_rank_list, _remove_repeated_slices
+from .._c_expression import load_mindir
 
 
 tensor_to_ms_type = {"Int8": mstype.int8, "Uint8": mstype.uint8, "Int16": mstype.int16, "Uint16": mstype.uint16,
@@ -228,6 +229,49 @@ def _check_param_prefix(filter_prefix, param_name):
     return False
 
 
+def load(file_name):
+    """
+    Load MindIR.
+
+    The returned object can be executed by a `GraphCell`. However, there are some limitations to the current use
+    of `GraphCell`, see class :class:`mindspore.nn.GraphCell` for more details.
+
+    Args:
+        file_name (str): MindIR file name.
+
+    Returns:
+        Object, a compiled graph that can executed by `GraphCell`.
+
+    Raises:
+        ValueError: MindIR file is incorrect.
+
+    Examples:
+        >>> import numpy as np
+        >>> import mindspore.nn as nn
+        >>> from mindspore import Tensor
+        >>> from mindspore.train import export, load
+        >>>
+        >>> net = nn.Conv2d(1, 1, kernel_size=3)
+        >>> input = Tensor(np.ones([1, 1, 3, 3]).astype(np.float32))
+        >>> export(net, input, file_name="net", file_format="MINDIR")
+        >>> graph = load("net.mindir")
+        >>> net = nn.GraphCell(graph)
+        >>> output = net(input)
+    """
+    if not isinstance(file_name, str):
+        raise ValueError("The file name must be string.")
+    if not os.path.exists(file_name):
+        raise ValueError("The file is not exist.")
+    if not file_name.endswith(".mindir"):
+        raise ValueError("The MindIR should end with mindir, please input the correct file name.")
+
+    logger.info("Execute the process of loading mindir.")
+    graph = load_mindir(file_name)
+    if graph is None:
+        raise RuntimeError("Load MindIR failed.")
+    return graph
+
+
 def load_checkpoint(ckpt_file_name, net=None, strict_load=False, filter_prefix=None):
     """
     Loads checkpoint info from a specified file.

tests/st/export_and_load/test_train_mindir.py

@@ -22,7 +22,7 @@ from mindspore.common.initializer import TruncatedNormal
 from mindspore.common.parameter import ParameterTuple
 from mindspore.ops import operations as P
 from mindspore.ops import composite as C
-from mindspore.train.serialization import export
+from mindspore.train.serialization import export, load
 
 
 def weight_variable():
@@ -112,3 +112,26 @@ def test_export_lenet_grad_mindir():
     export(net, predict, label, file_name="lenet_grad", file_format='MINDIR')
     verify_name = "lenet_grad.mindir"
     assert os.path.exists(verify_name)
+
+
+@pytest.mark.level0
+@pytest.mark.platform_x86_ascend_training
+@pytest.mark.platform_arm_ascend_training
+@pytest.mark.env_onecard
+def test_load_mindir_and_run():
+    context.set_context(mode=context.GRAPH_MODE, device_target="Ascend")
+    network = LeNet5()
+    network.set_train()
+
+    inputs0 = Tensor(np.ones([32, 1, 32, 32]).astype(np.float32) * 0.01)
+    outputs0 = network(inputs0)
+
+    inputs = Tensor(np.zeros([32, 1, 32, 32]).astype(np.float32))
+    export(network, inputs, file_name="test_lenet_load", file_format='MINDIR')
+    mindir_name = "test_lenet_load.mindir"
+    assert os.path.exists(mindir_name)
+
+    graph = load(mindir_name)
+    loaded_net = nn.GraphCell(graph)
+    outputs_after_load = loaded_net(inputs0)
+    assert np.allclose(outputs0.asnumpy(), outputs_after_load.asnumpy())