LoopPrologAndEpilogBuilder.hh

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/*
    Copyright (c) 2002-2020 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
    Permission is hereby granted, free of charge, to any person obtaining a
    copy of this software and associated documentation files (the "Software"),
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    the rights to use, copy, modify, merge, publish, distribute, sublicense,
    and/or sell copies of the Software, and to permit persons to whom the
    Software is furnished to do so, subject to the following conditions:
 
    The above copyright notice and this permission notice shall be included in
    all copies or substantial portions of the Software.
 
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    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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/**
 * @file LoopPrologAndEpilogBuilder.hh
 *
 * Declaration of LoopPrologAndEpilogBuilder interface.
 *
 * @author Mikael Lepistö 2008 (mikael.lepisto-no.spam-tut.fi)
 * @author Heikki Kultala 2015-2020 (heikki.kultala-no.spam-tuni.fi)
 * @note rating: red
 */
 
#ifndef TTA_LOOP_PROLOG_AND_EPILOG_BUILDER_HH
#define TTA_LOOP_PROLOG_AND_EPILOG_BUILDER_HH
 
class DataDependenceGraph;
class SimpleResourceManager;
class BasicBlockNode;
class ControlFlowGraph;
class ControlFlowEdge;
 
namespace TTAProgram {
    class Move;
    class BasicBlock;
    class InstructionReferenceManager;
    class Immediate;
}
 
/**
 * Classes that implement this interface are able to software bypass
 * moves.
 */
class LoopPrologAndEpilogBuilder {
public:
    LoopPrologAndEpilogBuilder();
    virtual ~LoopPrologAndEpilogBuilder();
    virtual int build(DataDependenceGraph& ddg, SimpleResourceManager& rm,
                      ControlFlowGraph& cfg, BasicBlockNode& loopBBN,
                      int endCycle = -1, bool createEpilog = true);
 
    BasicBlockNode* addPrologFromRM(
        SimpleResourceManager& prologRM,
        SimpleResourceManager& loopRM,
        ControlFlowGraph& cfg, BasicBlockNode& loopBBN);
 
    BasicBlockNode* addEpilogFromRM(
        SimpleResourceManager& prologEpilogRM,
        int ii, ControlFlowGraph& cfg, BasicBlockNode& loopBBN);
 
private:
 
void moveJumpDestination(
    TTAProgram::InstructionReferenceManager& irm,
    BasicBlockNode& tail,
    BasicBlockNode& dst, ControlFlowEdge& jumpEdge);
 
    void addPrologIntoCfg(
        ControlFlowGraph& cfg, BasicBlockNode& prologBBN,
        BasicBlockNode& loopBBN);
 
    void addEpilogIntoCfg(
        ControlFlowGraph& cfg, BasicBlockNode& epilogBBN,
        BasicBlockNode& loopBBN);
 
    bool optimizeProlog(TTAProgram::BasicBlock& prolog);
    bool optimizeEpilog(TTAProgram::BasicBlock& epilog);
};
 
#endif