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79 lines
2.1 KiB
C++
79 lines
2.1 KiB
C++
/* Title: BBLiveVar.h -*- C++ -*-
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Author: Ruchira Sasanka
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Date: Jun 30, 01
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Purpose: This is a wrapper class for BasicBlock which is used by live
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variable anaysis.
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*/
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#ifndef LIVE_VAR_BB_H
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#define LIVE_VAR_BB_H
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#include "LiveVarSet.h"
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#include "LiveVarMap.h"
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#include "llvm/BasicBlock.h"
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#include "llvm/Instruction.h"
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#include "llvm/Type.h"
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#include "llvm/iOther.h"
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class BBLiveVar
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{
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const BasicBlock* BaseBB; // pointer to BasicBlock
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unsigned int POId; // Post-Order ID
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LiveVarSet DefSet; // Def set for LV analysis
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LiveVarSet InSet, OutSet; // In & Out for LV analysis
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bool InSetChanged, OutSetChanged; // set if the InSet/OutSet is modified
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// map that contains phi args->BB they came
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// set by calcDefUseSets & used by setPropagate
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std::hash_map<const Value *, const BasicBlock *> PhiArgMap;
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// method to propogate an InSet to OutSet of a predecessor
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bool setPropagate( LiveVarSet *const OutSetOfPred,
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const LiveVarSet *const InSetOfThisBB,
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const BasicBlock *const PredBB);
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// To add an operand which is a def
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void addDef(const Value *Op);
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// To add an operand which is a use
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void addUse(const Value *Op);
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public:
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BBLiveVar( const BasicBlock* baseBB, unsigned int POId);
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inline bool isInSetChanged() const { return InSetChanged; }
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inline bool isOutSetChanged() const { return OutSetChanged; }
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inline unsigned int getPOId() const { return POId; }
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void calcDefUseSets() ; // calculates the Def & Use sets for this BB
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bool applyTransferFunc(); // calcultes the In in terms of Out
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// calculates Out set using In sets of the predecessors
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bool applyFlowFunc(BBToBBLiveVarMapType LVMap);
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inline const LiveVarSet* getOutSet() const { return &OutSet; }
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inline const LiveVarSet* getInSet() const { return &InSet; }
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void printAllSets() const; // for printing Def/In/Out sets
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void printInOutSets() const; // for printing In/Out sets
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~BBLiveVar() { } // nothing to do since only composite objects
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};
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#endif
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