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64 lines
2.2 KiB
64 lines
2.2 KiB
// Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <memory>
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#include <string>
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#include "paddle/fluid/framework/details/ssa_graph.h"
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#include "paddle/fluid/framework/program_desc.h"
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#include "paddle/fluid/platform/place.h"
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namespace paddle {
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namespace framework {
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namespace details {
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class SSAGraphBuilder {
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public:
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SSAGraphBuilder() {}
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virtual ~SSAGraphBuilder() {}
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virtual std::unique_ptr<SSAGraph> Build(const ProgramDesc &program) const = 0;
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DISABLE_COPY_AND_ASSIGN(SSAGraphBuilder);
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protected:
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/**
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* We only handle write after read(WAR), since it should not have a write
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* after write in program. If there are write after write operators, we need
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* prune them.
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*
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* https://en.wikipedia.org/wiki/Hazard_(computer_architecture)#Write_after_read_(WAR)
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*/
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static void PolishGraphToSupportDataHazards(SSAGraph *graph);
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static VarHandle *CreateOrGetLatestVarHandle(SSAGraph *graph,
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const std::string &each_var_name,
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const platform::Place &place,
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size_t place_offset);
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// Add an output variable (each_var_name, place, place_offset) to op_handle,
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// which belongs to graph
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static void CreateOpOutput(SSAGraph *graph, OpHandleBase *op_handle,
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const std::string &each_var_name,
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const platform::Place &place, size_t place_offset);
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static void AddOutputToLeafOps(SSAGraph *graph);
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static void PrintGraphviz(const SSAGraph &graph, std::ostream &sout);
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};
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} // namespace details
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} // namespace framework
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} // namespace paddle
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