OffsetAliasAnalyzer.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
    copy of this software and associated documentation files (the "Software"),
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    the rights to use, copy, modify, merge, publish, distribute, sublicense,
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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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    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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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_OFFSET_ALIAS_ANALYZER
#define TTA_OFFSET_ALIAS_ANALYZER
 
#include "MemoryAliasAnalyzer.hh"
#include "TCEString.hh"
#include <map>
 
class OffsetAliasAnalyzer : public MemoryAliasAnalyzer {
public:
    virtual bool isAddressTraceable(
        DataDependenceGraph& ddg, const ProgramOperation& pop);
    virtual AliasingResult analyze(
        DataDependenceGraph& ddg, const ProgramOperation& pop1, 
        const ProgramOperation& pop2, MoveNodeUse::BBRelation bbRelation);
 
    OffsetAliasAnalyzer(const TCEString& sp);
    ~OffsetAliasAnalyzer();
private:
 
    bool analyzeLoopPtrIncrease(
        const DataDependenceGraph& ddg, const MoveNode& mn, long& offset);
 
    bool sameLoopAndPrevSources(const DataDependenceGraph& ddg, const MoveNode& anc1, const MoveNode& anc2);
 
    struct OffsetData {
        const MoveNode *baseNode;
        int offset;
        OffsetData(const MoveNode* node, int offs) : 
            baseNode(node), offset(offs) {}
    };
    std::map <int,OffsetData> offsetData_;
        
    TCEString sp_;
};
 
#endif