text: /**
   * Copyright 2020 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.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifndef MINDSPORE_CCSRC_FRONTEND_OPTIMIZER_IRPASS_REF_ELIMINATE_H_
  #define MINDSPORE_CCSRC_FRONTEND_OPTIMIZER_IRPASS_REF_ELIMINATE_H_
  
  #include <memory>
  
  #include "ir/pattern_matcher.h"
  #include "frontend/optimizer/irpass.h"
  #include "frontend/optimizer/optimizer.h"
  
  namespace mindspore {
  namespace opt {
  namespace irpass {
  // {prim::kPrimMakeRef, X, Y, Z} -> Y
  class MakeRefEliminater : public OptimizerCaller {
   public:
    AnfNodePtr operator()(const OptimizerPtr &, const AnfNodePtr &node) override {
      PatternNode<AnfNodePtr> x, y, z;
      MATCH_REPLACE(node, PPrimitive(prim::kPrimMakeRef, x, y, z), y);
      return nullptr;
    }
  };
  
  // {prim::kPrimGetRefValue, Parameter} -> Parameter
  // {prim::kPrimGetRefOrigin, Parameter} -> Parameter
  class GetRefParamEliminater : public OptimizerCaller {
   public:
    AnfNodePtr operator()(const OptimizerPtr &, const AnfNodePtr &node) override {
      PatternNode<AnfNodePtr> x;
      MATCH_REPLACE(node, PPrimitive(prim::kPrimGetRefValue, x), x);
      MATCH_REPLACE(node, PPrimitive(prim::kPrimGetRefOrigin, x), x);
      return nullptr;
    }
  };
  
  // {prim::kPrimGetRefKey, {prim::kPrimMakeRef, X, Y, Z}} -> X
  // {prim::kPrimGetRefValue, {prim::kPrimMakeRef, X, Y, Z}} -> Y
  // {prim::kPrimGetRefOrigin, {prim::kPrimMakeRef, X, Y, Z}} -> Z
  class GetMakeRefEliminater : public OptimizerCaller {
   public:
    AnfNodePtr operator()(const OptimizerPtr &, const AnfNodePtr &node) override {
      PatternNode<AnfNodePtr> x, y, z;
      MATCH_REPLACE(node, PPrimitive(prim::kPrimGetRefKey, PPrimitive(prim::kPrimMakeRef, x, y, z)), x);
      MATCH_REPLACE(node, PPrimitive(prim::kPrimGetRefValue, PPrimitive(prim::kPrimMakeRef, x, y, z)), y);
      MATCH_REPLACE(node, PPrimitive(prim::kPrimGetRefOrigin, PPrimitive(prim::kPrimMakeRef, x, y, z)), z);
  
      return nullptr;
    }
  };
  
  // IsValueNode<RefKey>
  class ReplaceRefkeyByParam : public OptimizerCaller {
   public:
    AnfNodePtr operator()(const OptimizerPtr &optimizer, const AnfNodePtr &node) override {
      auto RefKeyLambda = [&node, &optimizer]() -> AnfNodePtr {
        auto refkey = GetValueNode<RefKeyPtr>(node);
        auto resource = std::dynamic_pointer_cast<pipeline::Resource>(optimizer->resource());
        MS_EXCEPTION_IF_NULL(resource);
  
        auto top_graph = resource->func_graph();
        MS_EXCEPTION_IF_NULL(top_graph);
  
        for (const auto &tnode : top_graph->parameters()) {
          auto para = tnode->cast<ParameterPtr>();
          if (para != nullptr && para->name() == refkey->tag()) {
            return para;
          }
        }
        return nullptr;
      };
      PatternNode<AnfNodePtr> x;
      MATCH_REPLACE_LAMBDA_IF(node, x, RefKeyLambda, x.CheckFunc(IsValueNode<RefKey>, node));
      return nullptr;
    }
  };
  }  // namespace irpass
  }  // namespace opt
  }  // namespace mindspore
  #endif  // MINDSPORE_CCSRC_FRONTEND_OPTIMIZER_IRPASS_REF_ELIMINATE_H_
  