StackAliasAnalyzer.hh

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/*
    Copyright (c) 2002-2009 Tampere University.
 
    This file is part of TTA-Based Codesign Environment (TCE).
 
    Permission is hereby granted, free of charge, to any person obtaining a
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    Software is furnished to do so, subject to the following conditions:
 
    The above copyright notice and this permission notice shall be included in
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 */
/**
 */
 
/**
 * @file StackAliasAnalyzer.hh
 *
 * Declaration of StackAliasAnalyzer class.
 * 
 * This class does simple alias analysis between memove addresses
 * that point to the stack.
 *
 * @author Heikki Kultala 2009 (heikki.kultala-no.spam-tut.fi)
 * @note rating: ref
 */
 
#ifndef TTA_STACK_ALIAS_ANALYZER
#define TTA_STACK_ALIAS_ANALYZER
 
#include "MemoryAliasAnalyzer.hh"
#include "TCEString.hh"
#include <map>
 
class StackAliasAnalyzer : public MemoryAliasAnalyzer {
public:
    virtual bool isAddressTraceable(
        DataDependenceGraph& ddg, const ProgramOperation& pop);
    virtual AliasingResult analyze(
        DataDependenceGraph& ddg, const ProgramOperation& pop1, 
        const ProgramOperation& pop2, MoveNodeUse::BBRelation bbInfo);
 
    StackAliasAnalyzer(const TCEString& sp);
    ~StackAliasAnalyzer();
 
    static bool getStackOffset(
        DataDependenceGraph& ddg, const ProgramOperation& pop, long& offset,
        long& loopIncrement, const TCEString& sp_);
private:
    // value is INT_MAX if not analyzable.
    std::map<int, std::pair<long, long> > offsetData_;
 
    TCEString sp_;
};
 
#endif