OperationDAGSelector.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 OperationDAGSelector.hh
 *
 * Declaration of OperationDAGSelector.
 *
 * @author Mikael Lepistö 2008 (mikael.lepisto-no.spam-tut.fi)
 * @note rating: red
 */
 
#ifndef TTA_OPERATION_DAG_SELECTOR_HH
#define TTA_OPERATION_DAG_SELECTOR_HH
 
#include <string>
#include <vector>
#include <set>
 
#include "OperationDAG.hh"
#include "CIStringSet.hh"
#include "TCEString.hh"
 
class Operation;
class ImmInfo;
 
/**
 * Class that search DAGs from operation set.
 */
class OperationDAGSelector {
public:
    
    /**
     * STL Container for returning and finding DAGs.
     */
    class OperationDAGList : public std::vector<OperationDAG*> {
    public:
        
        /**
         * Returns DAG that had least nodes.
         *
         * @return DAG that had least nodes.
         */
        OperationDAG& smallestNodeCount() const {
 
            if (empty()) {
                return OperationDAG::null;
            }
 
            OperationDAG* leastNodes = *begin();
 
            for (std::vector<OperationDAG*>::const_iterator i = begin(); 
                 i != end(); i++) {
                
                if ((*i)->nodeCount() < leastNodes->nodeCount()) {
                    leastNodes = *i;
                }
            }
            
            return *leastNodes;
        }        
    };
    struct CaseInsensitiveCmp {
        bool operator()(const TCEString& s1, const TCEString& s2) const {
            return s1.ciEqual(s2);
        }
    };
    typedef TCETools::CIStringSet OperationSet;
 
    static OperationDAGList findDags(
        const std::string& opName,
        OperationSet opSet,
        const ImmInfo* immInfo = nullptr);
    
    static OperationDAG* createExpandedDAG(
        const Operation& op, OperationSet& opSet);
    
private:
    OperationDAGSelector();
    virtual ~OperationDAGSelector();
 
    static int countUnknownOperations(
        OperationDAG& dag, OperationSet& opSet);
 
};
 
#endif