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Convert BBLiveVar to be a BasicBlock annotation, this removes the BB2BBLVMap from MethodLiveVarInfo.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@1721 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -73,15 +73,14 @@ class BBLiveVar;
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class MachineInstr;
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class MethodLiveVarInfo : public MethodPass {
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// A map between the BasicBlock and BBLiveVar
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std::map<const BasicBlock *, BBLiveVar *> BB2BBLVMap;
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// Machine Instr to LiveVarSet Map for providing LVset BEFORE each inst
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std::map<const MachineInstr *, const ValueSet *> MInst2LVSetBI;
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// Machine Instr to LiveVarSet Map for providing LVset AFTER each inst
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std::map<const MachineInstr *, const ValueSet *> MInst2LVSetAI;
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// Stored Method that the data is computed with respect to
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const Method *M;
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// --------- private methods -----------------------------------------
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@ -94,12 +93,10 @@ class MethodLiveVarInfo : public MethodPass {
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// calculates live var sets for instructions in a BB
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void calcLiveVarSetsForBB(const BasicBlock *BB);
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public:
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static AnalysisID ID; // We are an analysis, we must have an ID
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MethodLiveVarInfo(AnalysisID id = ID) { assert(id == ID); }
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~MethodLiveVarInfo() { releaseMemory(); }
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// --------- Implement the MethodPass interface ----------------------
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@ -73,15 +73,14 @@ class BBLiveVar;
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class MachineInstr;
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class MethodLiveVarInfo : public MethodPass {
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// A map between the BasicBlock and BBLiveVar
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std::map<const BasicBlock *, BBLiveVar *> BB2BBLVMap;
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// Machine Instr to LiveVarSet Map for providing LVset BEFORE each inst
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std::map<const MachineInstr *, const ValueSet *> MInst2LVSetBI;
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// Machine Instr to LiveVarSet Map for providing LVset AFTER each inst
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std::map<const MachineInstr *, const ValueSet *> MInst2LVSetAI;
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// Stored Method that the data is computed with respect to
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const Method *M;
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// --------- private methods -----------------------------------------
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@ -94,12 +93,10 @@ class MethodLiveVarInfo : public MethodPass {
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// calculates live var sets for instructions in a BB
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void calcLiveVarSetsForBB(const BasicBlock *BB);
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public:
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static AnalysisID ID; // We are an analysis, we must have an ID
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MethodLiveVarInfo(AnalysisID id = ID) { assert(id == ID); }
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~MethodLiveVarInfo() { releaseMemory(); }
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// --------- Implement the MethodPass interface ----------------------
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@ -15,8 +15,26 @@
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using std::cerr;
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static AnnotationID AID(AnnotationManager::getID("Analysis::BBLiveVar"));
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BBLiveVar *BBLiveVar::CreateOnBB(const BasicBlock *BB, unsigned POID) {
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BBLiveVar *Result = new BBLiveVar(BB, POID);
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BB->addAnnotation(Result);
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return Result;
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}
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BBLiveVar *BBLiveVar::GetFromBB(const BasicBlock *BB) {
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return (BBLiveVar*)BB->getAnnotation(AID);
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}
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void BBLiveVar::RemoveFromBB(const BasicBlock *BB) {
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bool Deleted = BB->deleteAnnotation(AID);
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assert(Deleted && "BBLiveVar annotation did not exist!");
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}
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BBLiveVar::BBLiveVar(const BasicBlock *bb, unsigned id)
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: BB(bb), POID(id) {
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: Annotation(AID), BB(bb), POID(id) {
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InSetChanged = OutSetChanged = false;
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calcDefUseSets();
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@ -152,9 +170,12 @@ bool BBLiveVar::setPropagate(ValueSet *OutSet, const ValueSet *InSet,
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InIt != InE; ++InIt) {
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const BasicBlock *PredBBOfPhiArg = PhiArgMap[*InIt];
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// if this var is not a phi arg OR
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// it's a phi arg and the var went down from this BB
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if (!PredBBOfPhiArg || PredBBOfPhiArg == PredBB)
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// Only propogate liveness of the value if it is either not an argument of
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// a PHI node, or if it IS an argument, AND 'PredBB' is the basic block
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// that it is coming in from. THIS IS BROKEN because the same value can
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// come in from multiple predecessors (and it's not a multimap)!
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//
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if (PredBBOfPhiArg == 0 || PredBBOfPhiArg == PredBB)
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if (OutSet->insert(*InIt).second)
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Changed = true;
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}
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@ -167,7 +188,7 @@ bool BBLiveVar::setPropagate(ValueSet *OutSet, const ValueSet *InSet,
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// propogates in set to OutSets of PREDECESSORs
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//-----------------------------------------------------------------------------
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bool BBLiveVar::applyFlowFunc(std::map<const BasicBlock *, BBLiveVar *> &LVMap){
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bool BBLiveVar::applyFlowFunc() {
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// IMPORTANT: caller should check whether inset changed
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// (else no point in calling)
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@ -178,7 +199,7 @@ bool BBLiveVar::applyFlowFunc(std::map<const BasicBlock *, BBLiveVar *> &LVMap){
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for (BasicBlock::pred_const_iterator PI = BB->pred_begin(),
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PE = BB->pred_begin(); PI != PE ; ++PI) {
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BBLiveVar *PredLVBB = LVMap[*PI];
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BBLiveVar *PredLVBB = BBLiveVar::GetFromBB(*PI);
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// do set union
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if (setPropagate(&PredLVBB->OutSet, &InSet, *PI)) {
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@ -1,6 +1,7 @@
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//===-- BBLiveVar.h - Live Variable Analysis for a BasicBlock ----*- C++ -*--=//
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//
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// This is a wrapper class for BasicBlock which is used by live var analysis.
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// This is a BasicBlock annotation class that is used by live var analysis to
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// hold data flow information for a basic block.
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//
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//===----------------------------------------------------------------------===//
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@ -8,12 +9,13 @@
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#define LIVE_VAR_BB_H
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#include "llvm/Analysis/LiveVar/ValueSet.h"
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#include "llvm/Annotation.h"
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#include <map>
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class Method;
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class BasicBlock;
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class Value;
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class BBLiveVar {
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class BBLiveVar : public Annotation {
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const BasicBlock *BB; // pointer to BasicBlock
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unsigned POID; // Post-Order ID
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@ -37,8 +39,13 @@ class BBLiveVar {
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void addUse(const Value *Op);
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void calcDefUseSets(); // calculates the Def & Use sets for this BB
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public:
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BBLiveVar(const BasicBlock *BB, unsigned POID);
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~BBLiveVar() {} // make dtor private
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public:
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static BBLiveVar *CreateOnBB(const BasicBlock *BB, unsigned POID);
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static BBLiveVar *GetFromBB(const BasicBlock *BB);
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static void RemoveFromBB(const BasicBlock *BB);
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inline bool isInSetChanged() const { return InSetChanged; }
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inline bool isOutSetChanged() const { return OutSetChanged; }
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@ -48,7 +55,7 @@ class BBLiveVar {
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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(std::map<const BasicBlock *, BBLiveVar *> &LVMap);
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bool applyFlowFunc();
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inline const ValueSet &getOutSet() const { return OutSet; }
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inline const ValueSet &getInSet() const { return InSet; }
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@ -21,12 +21,12 @@ AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
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// gets OutSet of a BB
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const ValueSet &MethodLiveVarInfo::getOutSetOfBB(const BasicBlock *BB) const {
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return BB2BBLVMap.find(BB)->second->getOutSet();
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return BBLiveVar::GetFromBB(BB)->getOutSet();
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}
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// gets InSet of a BB
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const ValueSet &MethodLiveVarInfo::getInSetOfBB(const BasicBlock *BB) const {
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return BB2BBLVMap.find(BB)->second->getInSet();
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return BBLiveVar::GetFromBB(BB)->getInSet();
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}
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@ -34,13 +34,14 @@ const ValueSet &MethodLiveVarInfo::getInSetOfBB(const BasicBlock *BB) const {
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// Performs live var analysis for a method
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//-----------------------------------------------------------------------------
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bool MethodLiveVarInfo::runOnMethod(Method *M) {
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bool MethodLiveVarInfo::runOnMethod(Method *Meth) {
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M = Meth;
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if (DEBUG_LV) std::cerr << "Analysing live variables ...\n";
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// create and initialize all the BBLiveVars of the CFG
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constructBBs(M);
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constructBBs(Meth);
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while (doSingleBackwardPass(M))
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while (doSingleBackwardPass(Meth))
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; // Iterate until we are done.
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if (DEBUG_LV) std::cerr << "Live Variable Analysis complete!\n";
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@ -62,8 +63,7 @@ void MethodLiveVarInfo::constructBBs(const Method *M) {
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if (DEBUG_LV) std::cerr << " For BB " << RAV(BB) << ":\n";
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// create a new BBLiveVar
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BBLiveVar *LVBB = new BBLiveVar(BB, POId);
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BB2BBLVMap[BB] = LVBB; // insert the pair to Map
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BBLiveVar *LVBB = BBLiveVar::CreateOnBB(BB, POId);
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if (DEBUG_LV)
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LVBB->printAllSets();
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@ -76,8 +76,8 @@ void MethodLiveVarInfo::constructBBs(const Method *M) {
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//
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for (Method::const_iterator BBRI = M->begin(), BBRE = M->end();
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BBRI != BBRE; ++BBRI, ++POId)
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if (!BB2BBLVMap[*BBRI]) // Not yet processed?
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BB2BBLVMap[*BBRI] = new BBLiveVar(*BBRI, POId);
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if (!BBLiveVar::GetFromBB(*BBRI)) // Not yet processed?
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BBLiveVar::CreateOnBB(*BBRI, POId);
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}
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@ -90,7 +90,7 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
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bool NeedAnotherIteration = false;
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for (po_iterator<const Method*> BBI = po_begin(M); BBI != po_end(M) ; ++BBI) {
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BBLiveVar *LVBB = BB2BBLVMap[*BBI];
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BBLiveVar *LVBB = BBLiveVar::GetFromBB(*BBI);
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assert(LVBB && "BasicBlock information not set for block!");
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if (DEBUG_LV) std::cerr << " For BB " << (*BBI)->getName() << ":\n";
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@ -99,7 +99,7 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
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LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
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if (LVBB->isInSetChanged()) // to calc Outsets of preds
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NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap);
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NeedAnotherIteration |= LVBB->applyFlowFunc();
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if (DEBUG_LV) LVBB->printInOutSets();
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}
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@ -110,15 +110,11 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
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void MethodLiveVarInfo::releaseMemory() {
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// First delete all BBLiveVar objects created in constructBBs(). A new object
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// of type BBLiveVar is created for every BasicBlock in the method
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//
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for (std::map<const BasicBlock *, BBLiveVar *>::iterator
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HMI = BB2BBLVMap.begin(),
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HME = BB2BBLVMap.end(); HMI != HME; ++HMI)
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delete HMI->second; // delete all BBLiveVar in BB2BBLVMap
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BB2BBLVMap.clear();
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// First remove all BBLiveVar annotations created in constructBBs().
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if (M)
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for (Method::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
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BBLiveVar::RemoveFromBB(*I);
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M = 0;
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// Then delete all objects of type ValueSet created in calcLiveVarSetsForBB
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// and entered into MInst2LVSetBI and MInst2LVSetAI (these are caches
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@ -15,8 +15,26 @@
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using std::cerr;
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static AnnotationID AID(AnnotationManager::getID("Analysis::BBLiveVar"));
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BBLiveVar *BBLiveVar::CreateOnBB(const BasicBlock *BB, unsigned POID) {
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BBLiveVar *Result = new BBLiveVar(BB, POID);
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BB->addAnnotation(Result);
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return Result;
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}
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BBLiveVar *BBLiveVar::GetFromBB(const BasicBlock *BB) {
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return (BBLiveVar*)BB->getAnnotation(AID);
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}
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void BBLiveVar::RemoveFromBB(const BasicBlock *BB) {
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bool Deleted = BB->deleteAnnotation(AID);
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assert(Deleted && "BBLiveVar annotation did not exist!");
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}
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BBLiveVar::BBLiveVar(const BasicBlock *bb, unsigned id)
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: BB(bb), POID(id) {
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: Annotation(AID), BB(bb), POID(id) {
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InSetChanged = OutSetChanged = false;
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calcDefUseSets();
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@ -152,9 +170,12 @@ bool BBLiveVar::setPropagate(ValueSet *OutSet, const ValueSet *InSet,
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InIt != InE; ++InIt) {
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const BasicBlock *PredBBOfPhiArg = PhiArgMap[*InIt];
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// if this var is not a phi arg OR
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// it's a phi arg and the var went down from this BB
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if (!PredBBOfPhiArg || PredBBOfPhiArg == PredBB)
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// Only propogate liveness of the value if it is either not an argument of
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// a PHI node, or if it IS an argument, AND 'PredBB' is the basic block
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// that it is coming in from. THIS IS BROKEN because the same value can
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// come in from multiple predecessors (and it's not a multimap)!
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//
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if (PredBBOfPhiArg == 0 || PredBBOfPhiArg == PredBB)
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if (OutSet->insert(*InIt).second)
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Changed = true;
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}
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@ -167,7 +188,7 @@ bool BBLiveVar::setPropagate(ValueSet *OutSet, const ValueSet *InSet,
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// propogates in set to OutSets of PREDECESSORs
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//-----------------------------------------------------------------------------
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bool BBLiveVar::applyFlowFunc(std::map<const BasicBlock *, BBLiveVar *> &LVMap){
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bool BBLiveVar::applyFlowFunc() {
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// IMPORTANT: caller should check whether inset changed
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// (else no point in calling)
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@ -178,7 +199,7 @@ bool BBLiveVar::applyFlowFunc(std::map<const BasicBlock *, BBLiveVar *> &LVMap){
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for (BasicBlock::pred_const_iterator PI = BB->pred_begin(),
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PE = BB->pred_begin(); PI != PE ; ++PI) {
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BBLiveVar *PredLVBB = LVMap[*PI];
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BBLiveVar *PredLVBB = BBLiveVar::GetFromBB(*PI);
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// do set union
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if (setPropagate(&PredLVBB->OutSet, &InSet, *PI)) {
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@ -1,6 +1,7 @@
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//===-- BBLiveVar.h - Live Variable Analysis for a BasicBlock ----*- C++ -*--=//
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//
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// This is a wrapper class for BasicBlock which is used by live var analysis.
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// This is a BasicBlock annotation class that is used by live var analysis to
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// hold data flow information for a basic block.
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//
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//===----------------------------------------------------------------------===//
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@ -8,12 +9,13 @@
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#define LIVE_VAR_BB_H
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#include "llvm/Analysis/LiveVar/ValueSet.h"
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#include "llvm/Annotation.h"
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#include <map>
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class Method;
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class BasicBlock;
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class Value;
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class BBLiveVar {
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class BBLiveVar : public Annotation {
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const BasicBlock *BB; // pointer to BasicBlock
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unsigned POID; // Post-Order ID
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@ -37,8 +39,13 @@ class BBLiveVar {
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void addUse(const Value *Op);
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void calcDefUseSets(); // calculates the Def & Use sets for this BB
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public:
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BBLiveVar(const BasicBlock *BB, unsigned POID);
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~BBLiveVar() {} // make dtor private
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public:
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static BBLiveVar *CreateOnBB(const BasicBlock *BB, unsigned POID);
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static BBLiveVar *GetFromBB(const BasicBlock *BB);
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static void RemoveFromBB(const BasicBlock *BB);
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inline bool isInSetChanged() const { return InSetChanged; }
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inline bool isOutSetChanged() const { return OutSetChanged; }
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@ -48,7 +55,7 @@ class BBLiveVar {
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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(std::map<const BasicBlock *, BBLiveVar *> &LVMap);
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bool applyFlowFunc();
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inline const ValueSet &getOutSet() const { return OutSet; }
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inline const ValueSet &getInSet() const { return InSet; }
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@ -21,12 +21,12 @@ AnalysisID MethodLiveVarInfo::ID(AnalysisID::create<MethodLiveVarInfo>());
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// gets OutSet of a BB
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const ValueSet &MethodLiveVarInfo::getOutSetOfBB(const BasicBlock *BB) const {
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return BB2BBLVMap.find(BB)->second->getOutSet();
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return BBLiveVar::GetFromBB(BB)->getOutSet();
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}
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// gets InSet of a BB
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const ValueSet &MethodLiveVarInfo::getInSetOfBB(const BasicBlock *BB) const {
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return BB2BBLVMap.find(BB)->second->getInSet();
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return BBLiveVar::GetFromBB(BB)->getInSet();
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}
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@ -34,13 +34,14 @@ const ValueSet &MethodLiveVarInfo::getInSetOfBB(const BasicBlock *BB) const {
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// Performs live var analysis for a method
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//-----------------------------------------------------------------------------
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bool MethodLiveVarInfo::runOnMethod(Method *M) {
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bool MethodLiveVarInfo::runOnMethod(Method *Meth) {
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M = Meth;
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if (DEBUG_LV) std::cerr << "Analysing live variables ...\n";
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// create and initialize all the BBLiveVars of the CFG
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constructBBs(M);
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constructBBs(Meth);
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while (doSingleBackwardPass(M))
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while (doSingleBackwardPass(Meth))
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; // Iterate until we are done.
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if (DEBUG_LV) std::cerr << "Live Variable Analysis complete!\n";
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@ -62,8 +63,7 @@ void MethodLiveVarInfo::constructBBs(const Method *M) {
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if (DEBUG_LV) std::cerr << " For BB " << RAV(BB) << ":\n";
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// create a new BBLiveVar
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BBLiveVar *LVBB = new BBLiveVar(BB, POId);
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BB2BBLVMap[BB] = LVBB; // insert the pair to Map
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BBLiveVar *LVBB = BBLiveVar::CreateOnBB(BB, POId);
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if (DEBUG_LV)
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LVBB->printAllSets();
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@ -76,8 +76,8 @@ void MethodLiveVarInfo::constructBBs(const Method *M) {
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//
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for (Method::const_iterator BBRI = M->begin(), BBRE = M->end();
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BBRI != BBRE; ++BBRI, ++POId)
|
||||
if (!BB2BBLVMap[*BBRI]) // Not yet processed?
|
||||
BB2BBLVMap[*BBRI] = new BBLiveVar(*BBRI, POId);
|
||||
if (!BBLiveVar::GetFromBB(*BBRI)) // Not yet processed?
|
||||
BBLiveVar::CreateOnBB(*BBRI, POId);
|
||||
}
|
||||
|
||||
|
||||
@ -90,7 +90,7 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
|
||||
|
||||
bool NeedAnotherIteration = false;
|
||||
for (po_iterator<const Method*> BBI = po_begin(M); BBI != po_end(M) ; ++BBI) {
|
||||
BBLiveVar *LVBB = BB2BBLVMap[*BBI];
|
||||
BBLiveVar *LVBB = BBLiveVar::GetFromBB(*BBI);
|
||||
assert(LVBB && "BasicBlock information not set for block!");
|
||||
|
||||
if (DEBUG_LV) std::cerr << " For BB " << (*BBI)->getName() << ":\n";
|
||||
@ -99,7 +99,7 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
|
||||
LVBB->applyTransferFunc(); // apply the Tran Func to calc InSet
|
||||
|
||||
if (LVBB->isInSetChanged()) // to calc Outsets of preds
|
||||
NeedAnotherIteration |= LVBB->applyFlowFunc(BB2BBLVMap);
|
||||
NeedAnotherIteration |= LVBB->applyFlowFunc();
|
||||
|
||||
if (DEBUG_LV) LVBB->printInOutSets();
|
||||
}
|
||||
@ -110,15 +110,11 @@ bool MethodLiveVarInfo::doSingleBackwardPass(const Method *M) {
|
||||
|
||||
|
||||
void MethodLiveVarInfo::releaseMemory() {
|
||||
// First delete all BBLiveVar objects created in constructBBs(). A new object
|
||||
// of type BBLiveVar is created for every BasicBlock in the method
|
||||
//
|
||||
for (std::map<const BasicBlock *, BBLiveVar *>::iterator
|
||||
HMI = BB2BBLVMap.begin(),
|
||||
HME = BB2BBLVMap.end(); HMI != HME; ++HMI)
|
||||
delete HMI->second; // delete all BBLiveVar in BB2BBLVMap
|
||||
|
||||
BB2BBLVMap.clear();
|
||||
// First remove all BBLiveVar annotations created in constructBBs().
|
||||
if (M)
|
||||
for (Method::const_iterator I = M->begin(), E = M->end(); I != E; ++I)
|
||||
BBLiveVar::RemoveFromBB(*I);
|
||||
M = 0;
|
||||
|
||||
// Then delete all objects of type ValueSet created in calcLiveVarSetsForBB
|
||||
// and entered into MInst2LVSetBI and MInst2LVSetAI (these are caches
|
||||
|
Loading…
Reference in New Issue
Block a user