ControlDependenceEdge.hh

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
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/**
 * @file ControlDependenceEdge.hh
 *
 * Prototype of graph-based program representation: declaration of graph
 * control dependence edge.
 *
 * @author Andrea Cilio 2005 (cilio-no.spam-cs.tut.fi)
 * @author Vladimir Guzma 2006 (vladimir.guzma-no.spam-tut.fi)
 * @note rating: red
 */
 
#ifndef TTA_CONTROL_DEPENDENCE_EDGE_HH
#define TTA_CONTROL_DEPENDENCE_EDGE_HH
 
#include "GraphEdge.hh"
 
/**
 * Edge of the control dependence graph (control dependence edge). Each edge
 * implies control dependency.
 */
class ControlDependenceEdge : public GraphEdge {
public:
    friend class ProgramDependenceGraph;
    enum CDGEdgeType {
        CDEP_EDGE_NORMAL,
        CDEP_EDGE_TRUE,
        CDEP_EDGE_FALSE,
        CDEP_EDGE_LOOPCLOSE};
 
    ControlDependenceEdge(
        CDGEdgeType edgeType = CDEP_EDGE_NORMAL) :
        edgeType_(edgeType) {}
 
    virtual ~ControlDependenceEdge();
 
    TCEString toString() const;
    bool isNormalEdge() const { return edgeType_ == CDEP_EDGE_NORMAL; }
    bool isTrueEdge() const { return edgeType_ == CDEP_EDGE_TRUE; }
    bool isFalseEdge() const { return edgeType_ == CDEP_EDGE_FALSE; }
    bool isLoopCloseEdge() const { return edgeType_ == CDEP_EDGE_LOOPCLOSE;}
    CDGEdgeType edgeType() const { return edgeType_; }
 
protected:
    void invertEdgePredicate();
private:
    CDGEdgeType edgeType_;
};
 
#endif