BFPostpassLoopDRE.hh

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/*
    Copyright (c) 2002-2014 Tampere University.
 
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/**
 * @file BFPostpassLoopDRE.hh
 *
 * Declaration of BFPostpassLoopDRE class
 *
 * Performs a dead-result elimination of a loop-bypassed move.
 * The move which is eliminated from the loop body is still left
 * in the epilog, to have correct value for the register after
 * the loop.
 *
 * This class is called in the postpass-bypass phase.
 *
 * @author Heikki Kultala 2014-2020(heikki.kultala-no.spam-tuni.fi)
 * @note rating: red
 */
 
#ifndef TTA_BF_POSTPASS_LOOP_DRE_HH
#define TTA_BF_POSTPASS_LOOP_DRE_HH
 
#include "BFOptimization.hh"
 
class BFPostpassLoopDRE : public BFOptimization {
public:
    BFPostpassLoopDRE(BF2Scheduler& sched, MoveNode& mn, int srcCycle) :
        BFOptimization(sched), mn_(mn), srcCycle_(srcCycle) {}
    bool operator()() override;
    void undoOnlyMe() override;
private:
 
    bool dreAllowed();
    MoveNode& mn_;
    MoveNode* prologMN_;
    int srcCycle_;
};
 
#endif