// Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may abtain 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. #pragma once #include #include #include #include #include #include #include "paddle/fluid/framework/details/memory_optimize_helper.h" #include "paddle/fluid/framework/ir/graph.h" #include "paddle/fluid/framework/ir/pass.h" namespace paddle { namespace framework { namespace details { class GraphView { public: GraphView() = default; void Build(ir::Graph* g); const std::vector AllOps(); ir::Node* GetNodeByName(const std::string& name, const std::vector& nodes) const; std::vector PendingOpsOnVar(ir::Node* var); // Will Deperated in the future. // NOTE(dzhwinter) : Python memory optimize will reuse // memory based var name, so different op output may // have the same variable name. enable inplace on such node // will generate a circle in ssa graph. bool ReusedInPythonMemOpt(const std::string& var) const; private: std::vector ops_; std::unordered_set dup_nodes_; // mem opt affect nodes std::map> adj_list_; }; typedef std::vector> SSANodePair; class InplacePass : public ir::Pass { public: InplacePass(); protected: std::unique_ptr ApplyImpl( std::unique_ptr graph) const override; void InitSSAGraphNodes() const; private: const SSANodePair TryInplaceModifyVar(const std::string& var, const std::string& cache_var, const size_t& idx, ir::Graph* graph) const; void CommitModify(const SSANodePair&, ir::Graph* graph) const; void WithdrawModify(const SSANodePair& nodes, ir::Graph* graph) const; void InplaceModifyDesc(const std::string& in_var, const std::string& out_var, const size_t& idx) const; void TryInplaceOpInputOutput(ir::Node* op, ir::Graph* graph) const; mutable std::map> var_nodes_; mutable std::unordered_set whitelist_; mutable GraphView view_; }; } // namespace details } // namespace framework } // namespace paddle