!29325 [GraphKernel] support cse in subgraph.

Merge pull request !29325 from chenlei_autodiff/gk_lite

mindspore/ccsrc/backend/optimizer/graph_kernel/graph_kernel_cse.cc

@@ -1,5 +1,5 @@
 /**
- * Copyright 2020-2021 Huawei Technologies Co., Ltd
+ * Copyright 2020-2022 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.
@@ -40,7 +40,8 @@ bool IsCNodePrimitveEqual(const CNodePtr &main, const CNodePtr &node, const std:
     }
     auto main_attrs = main_primitive->attrs();
     auto node_attrs = node_primitive->attrs();
-    std::vector<std::string> exclude_attrs{"IsFeatureMapOutput", "IsFeatureMapInputList", "pri_format"};
+    std::vector<std::string> exclude_attrs{"IsFeatureMapOutput", "IsFeatureMapInputList", "pri_format", "input_names",
+                                           "output_names"};
     for (auto &attr : exclude_attrs) {
       auto main_attrs_iter = main_attrs.find(attr);
       if (main_attrs_iter != main_attrs.end()) {
@@ -121,6 +122,14 @@ bool GraphKernelBackendCSE::CheckEqualCnodeInputs(const AnfNodePtr &main, const
 bool GraphKernelCSE::Run(const FuncGraphPtr &func_graph) {
   MS_EXCEPTION_IF_NULL(func_graph);
   auto graphkernel_backend_cse = std::make_shared<GraphKernelBackendCSE>(black_list_);
-  return graphkernel_backend_cse->Cse(func_graph, func_graph->manager());
+  auto changed = graphkernel_backend_cse->Cse(func_graph, func_graph->manager());
+  auto nodes = TopoSort(func_graph->get_return());
+  for (auto node : nodes) {
+    auto graph_kernel_fg = GetCNodeFuncGraph(node);
+    if (graph_kernel_fg != nullptr) {
+      changed = graphkernel_backend_cse->Cse(graph_kernel_fg, graph_kernel_fg->manager()) || changed;
+    }
+  }
+  return changed;
 }
 }  // namespace mindspore::graphkernel