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BitVectorAnalysis.cpp
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/*******************************************************************************
*
* (c) Copyright IBM Corp. 2000, 2016
*
* This program and the accompanying materials are made available
* under the terms of the Eclipse Public License v1.0 and
* Apache License v2.0 which accompanies this distribution.
*
* The Eclipse Public License is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* The Apache License v2.0 is available at
* http://www.opensource.org/licenses/apache2.0.php
*
* Contributors:
* Multiple authors (IBM Corp.) - initial implementation and documentation
*******************************************************************************/
#include <stdint.h> // for int32_t
#include <string.h> // for NULL, memset
#include "compile/Compilation.hpp"
#include "compile/Method.hpp" // for HIGH_VISIT_COUNT
#include "control/Options.hpp"
#include "control/Options_inlines.hpp"
#include "cs2/bitvectr.h"
#include "cs2/tableof.h" // for TableOf, etc
#include "env/TRMemory.hpp" // for BitVector, etc
#include "il/Block.hpp" // for Block, toBlock
#include "il/Node.hpp" // for Node, etc
#include "il/TreeTop.hpp" // for TreeTop
#include "il/TreeTop_inlines.hpp" // for TreeTop::getNode, etc
#include "infra/Assert.hpp" // for TR_ASSERT
#include "infra/Cfg.hpp" // for CFG
#include "infra/Link.hpp" // for TR_LinkHead
#include "infra/List.hpp"
#include "infra/TRCfgEdge.hpp" // for CFGEdge
#include "infra/TRCfgNode.hpp" // for CFGNode
#include "optimizer/Structure.hpp"
#include "optimizer/DataFlowAnalysis.hpp"
class TR_BitVector;
static int32_t numIterations = 0;
// This file contains the methods specifying the forward
// bit vector analysis rules for each structure. Also contain
// definitions of other methods in class BitVectorAnalysis.
//
//
template<class Container>
bool
TR_BasicDFSetAnalysis<Container *>::
supportsGenAndKillSets()
{
return false;
}
template<class Container>
void
TR_BasicDFSetAnalysis<Container *>::
initializeGenAndKillSetInfo()
{
}
template<class Container>
TR_DataFlowAnalysis::Kind
TR_BasicDFSetAnalysis<Container *>::
getKind()
{
return BasicDFSetAnalysis;
}
// Perform the data flow analysis, including initialization
template<class Container>
bool
TR_BasicDFSetAnalysis<Container *>::
performAnalysis(TR_Structure *rootStructure,
bool checkForChanges)
{
LexicalTimer tlex("basicDFSetAnalysis_pA", comp()->phaseTimer());
//traceMsg(comp(), "DJS perform analysis %d, nodes = %d, bits = %d\n", this->getKind(), comp()->getFlowGraph()->getNextNodeNumber(), getNumberOfBits());
//comp()->printMemStatsBefore("DJS - Before DFA");
// Table of bit vectors to be used during the analysis.
CS2::TableOf<TR::BitVector, TR::Allocator>
bvTable(64, comp()->allocator());
_bitVectorTable = &bvTable;
rootStructure->resetAnalysisInfo();
rootStructure->resetAnalyzedStatus();
initializeDFSetAnalysis();
//comp()->printMemStatsAfter("DJS - After initialize DFA");
if (!postInitializationProcessing())
return false;
doAnalysis(rootStructure, checkForChanges);
//rootStructure->resetAnalysisInfo();
//rootStructure->resetAnalyzedStatus();
//comp()->printMemStatsAfter("DJS - After DFA");
return true;
}
template<class Container>
TR::BitVector *
TR_BasicDFSetAnalysis<Container *>::
allocateBitVector()
{
CS2::TableIndex i = _bitVectorTable->AddEntry(*_bitVectorTable);
return &_bitVectorTable->ElementAt(i);
}
template<class Container>
void
TR_BasicDFSetAnalysis<Container *>::
allocateContainer(Container **result, bool, bool)
{
*result = new (trStackMemory()) Container(_numberOfBits, trMemory(), stackAlloc);
}
template<class Container>
void
TR_BasicDFSetAnalysis<Container *>::
allocateBlockInfoContainer(Container **result, bool, bool)
{
*result = new (trStackMemory()) Container(_numberOfBits, trMemory(), stackAlloc);
}
template<class Container>
void
TR_BasicDFSetAnalysis<Container *>::
allocateBlockInfoContainer(Container **result, Container*)
{
*result = new (trStackMemory()) Container(_numberOfBits, trMemory(), stackAlloc);
}
template<class Container>
void
TR_BasicDFSetAnalysis<Container *>::
allocateTempContainer(Container **result, Container*)
{
*result = new (trStackMemory()) Container(_numberOfBits, trMemory(), stackAlloc);
}
template<class Container>void TR_BasicDFSetAnalysis<Container *>::initializeBlockInfo(bool allocateLater)
{
if (_blockAnalysisInfo)
return;
_numberOfNodes = _cfg->getNextNodeNumber();
TR_ASSERT(_numberOfNodes > 0, "BVA, node numbers not assigned");
if (_numberOfBits == Container::nullContainerCharacteristic)
_numberOfBits = getNumberOfBits();
_blockAnalysisInfo = (Container **)trMemory()->allocateStackMemory(_numberOfNodes*sizeof(Container *));
if (allocateLater)
{
memset(_blockAnalysisInfo, 0, _numberOfNodes*sizeof(Container *));
}
else
{
for (int32_t i=0;i<_numberOfNodes;i++)
this->allocateBlockInfoContainer(&_blockAnalysisInfo[i]);
}
}
template<class Container>void TR_BasicDFSetAnalysis<Container *>::initializeBasicDFSetAnalysis()
{
if (_blockAnalysisInfo == NULL)
initializeBlockInfo();
_hasImproperRegion = _cfg->getStructure()->markStructuresWithImproperRegions();
if (comp()->getMethodSymbol()->mayHaveNestedLoops() &&
!comp()->getOption(TR_DisableNewBVA))
{
_hasImproperRegion = false; // Probably use a run time option here to enable old flow analysis behav
}
else
_hasImproperRegion = true;
if (comp()->getVisitCount() > HIGH_VISIT_COUNT)
{
comp()->resetVisitCounts(1);
dumpOptDetails(comp(), "\nResetting visit counts for this method before bit vector analysis\n");
}
this->allocateContainer(&_regularInfo);
this->allocateContainer(&_exceptionInfo);
this->allocateContainer(&_temp);
this->allocateContainer(&_temp2);
_nodesInCycle = allocateBitVector();
if (supportsGenAndKillSets())
{
int32_t arraySize = _numberOfNodes*sizeof(Container*);
_regularGenSetInfo = (Container**)trMemory()->allocateStackMemory(arraySize);
memset(_regularGenSetInfo, 0, arraySize);
_regularKillSetInfo = (Container**)trMemory()->allocateStackMemory(arraySize);
memset(_regularKillSetInfo, 0, arraySize);
_exceptionGenSetInfo = (Container**)trMemory()->allocateStackMemory(arraySize);
memset(_exceptionGenSetInfo, 0, arraySize);
_exceptionKillSetInfo = (Container**)trMemory()->allocateStackMemory(arraySize);
memset(_exceptionKillSetInfo, 0, arraySize);
initializeGenAndKillSetInfo();
if (!_hasImproperRegion)
{
initializeGenAndKillSetInfoForStructures();
if (traceBVA())
dumpOptDetails(comp(), "\n ************** Completed initialization of gen and kill sets for all structures ************* \n");
}
}
else
{
_regularGenSetInfo = NULL;
_regularKillSetInfo = NULL;
_exceptionGenSetInfo = NULL;
_exceptionKillSetInfo = NULL;
}
_cfg->getStructure()->resetAnalyzedStatus();
if (comp()->getVisitCount() > HIGH_VISIT_COUNT)
{
comp()->resetVisitCounts(1);
dumpOptDetails(comp(), "\nResetting visit counts for this method before bit vector analysis\n");
}
}
template<class Container>void TR_BasicDFSetAnalysis<Container *>::initializeGenAndKillSetInfoForStructures()
{
initializeGenAndKillSetInfoPropertyForStructure(_cfg->getStructure(), false);
initializeGenAndKillSetInfoForStructure(_cfg->getStructure());
}
template<class Container>void TR_BasicDFSetAnalysis<Container *>::initializeGenAndKillSetInfoForStructure(TR_Structure *s)
{
TR_RegionStructure *region = s->asRegion();
if (region)
{
if (region->containsImproperRegion() ||
!canGenAndKillForStructure(region))
{
TR_RegionStructure::Cursor si(*region);
TR_StructureSubGraphNode *subNode;
for (subNode = si.getCurrent(); subNode; subNode = si.getNext())
{
addToAnalysisQueue(subNode, 0);
initializeGenAndKillSetInfoForStructure(subNode->getStructure());
}
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = getAnalysisInfo(s);
}
else
{
initializeGenAndKillSetInfoForRegion(region);
}
}
else if (!s->containsImproperRegion())
initializeGenAndKillSetInfoForBlock(s->asBlock());
}
template<class Container>void TR_BasicDFSetAnalysis<Container *>::initializeGenAndKillSetInfoPropertyForStructure(TR_Structure *s, bool inLoop)
{
bool b = canGenAndKillForStructure(s);
TR_RegionStructure *region = s->asRegion();
if (region)
{
if (region->isNaturalLoop())
inLoop = true;
}
if (!inLoop)
s->setContainsImproperRegion(true);
if (region)
{
TR_RegionStructure::Cursor si(*region);
TR_StructureSubGraphNode *subNode;
for (subNode = si.getCurrent(); subNode; subNode = si.getNext())
{
initializeGenAndKillSetInfoPropertyForStructure(subNode->getStructure(), inLoop);
}
}
}
template<class Container>bool TR_ForwardDFSetAnalysis<Container *>::canGenAndKillForStructure(TR_Structure *nodeStructure)
{
if (!this->supportsGenAndKillSetsForStructures())
return false;
if (this->_hasImproperRegion ||
nodeStructure->containsImproperRegion())
return false;
TR_RegionStructure *naturalLoop = nodeStructure->asRegion();
if (naturalLoop && naturalLoop->isNaturalLoop())
{
TR_StructureSubGraphNode *entryNode = naturalLoop->getEntry();
TR::BitVector seenExitNodes(this->comp()->allocator());
ListIterator<TR::CFGEdge> ei(&naturalLoop->getExitEdges());
TR::CFGEdge *edge;
for (edge = ei.getCurrent(); edge != NULL; edge = ei.getNext())
{
TR::CFGNode *toNode = edge->getTo();
if (seenExitNodes.ValueAt(toNode->getNumber()))
continue;
seenExitNodes[toNode->getNumber()] = true;
bool seenNonBackEdge = false;
bool seenLoopBackEdge = false;
TR::list<TR::CFGEdge*> predList(toNode->getPredecessors());
predList.insert(predList.end(), toNode->getExceptionPredecessors().begin(), toNode->getExceptionPredecessors().end());
for (auto pred = predList.begin(); pred != predList.end(); ++pred)
{
TR::CFGNode *fromNode = (*pred)->getFrom();
if (fromNode->hasSuccessor(entryNode) ||
fromNode->hasExceptionSuccessor(entryNode))
{
if (seenNonBackEdge)
{
naturalLoop->setContainsImproperRegion(true);
break;
}
seenLoopBackEdge = true;
}
else
{
if (seenLoopBackEdge)
{
naturalLoop->setContainsImproperRegion(true);
break;
}
seenNonBackEdge = true;
}
}
}
if (naturalLoop->containsImproperRegion())
{
TR_Structure *parent = naturalLoop->getParent();
while (parent)
{
parent->asRegion()->setContainsImproperRegion(true);
parent = parent->getParent();
}
return false;
}
}
return true;
}
template<class Container>void TR_ForwardDFSetAnalysis<Container *>::initializeGenAndKillSetInfoForRegion(TR_RegionStructure *region)
{
TR::BitVector exitNodes(this->comp()->allocator());
//
// Allocate the storage for every exit out of the region
//
//
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = this->getAnalysisInfo(region);
if (!region->hasBeenAnalyzedBefore())
region->setAnalyzedStatus(true);
else
return;
{
analysisInfo->_regularGenSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
analysisInfo->_regularKillSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
analysisInfo->_exceptionGenSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
analysisInfo->_exceptionKillSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
analysisInfo->_currentRegularGenSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
analysisInfo->_currentRegularKillSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
analysisInfo->_currentExceptionGenSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
analysisInfo->_currentExceptionKillSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
ListIterator<TR::CFGEdge> ei(®ion->getExitEdges());
for (TR::CFGEdge *edge = ei.getCurrent(); edge != NULL; edge = ei.getNext())
{
int32_t toStructureNumber = edge->getTo()->getNumber();
if (!exitNodes.ValueAt(toStructureNumber))
{
Container *b = NULL;
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_regularGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_regularKillSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_exceptionGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_exceptionKillSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_currentRegularGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_currentRegularKillSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_currentExceptionGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_currentExceptionKillSetInfo->add(pair);
exitNodes[toStructureNumber] = true;
}
}
if (region->isNaturalLoop())
{
int32_t toStructureNumber = region->getNumber();
Container *b = NULL;
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_regularGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_regularKillSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_exceptionGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_exceptionKillSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_currentRegularGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_currentRegularKillSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_currentExceptionGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, toStructureNumber);
analysisInfo->_currentExceptionKillSetInfo->add(pair);
}
}
TR::BitVector pendingList(this->comp()->allocator());
// Set the pending list to be all of the region's subnodes.
//
TR_RegionStructure::Cursor si(*region);
TR_StructureSubGraphNode *subNode;
for (subNode = si.getCurrent(); subNode; subNode = si.getNext())
pendingList[subNode->getNumber()] = true;
int32_t numIterations = 1;
this->_nodesInCycle->Clear();
if (this->traceBVA())
traceMsg(this->comp(), "\nGen : Analyzing REGION : %p NUMBER : %d ITERATION NUMBER : %d\n", region, region->getNumber(), numIterations);
numIterations++;
this->addToAnalysisQueue(region->getEntry(), 0);
initializeGenAndKillSetInfo(region, pendingList);
if (region->isNaturalLoop())
{
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = this->getAnalysisInfo(region);
Container *killBitVector = analysisInfo->getContainer(analysisInfo->_regularKillSetInfo, region->getNumber());
Container *genBitVector = analysisInfo->getContainer(analysisInfo->_regularGenSetInfo, region->getNumber());
Container *exceptionKillBitVector = analysisInfo->getContainer(analysisInfo->_exceptionKillSetInfo, region->getNumber());
Container *exceptionGenBitVector = analysisInfo->getContainer(analysisInfo->_exceptionGenSetInfo, region->getNumber());
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair;
if (analysisInfo->_regularGenSetInfo)
{
for (pair = analysisInfo->_regularGenSetInfo->getFirst(); pair; pair = pair->getNext())
{
if (pair->_container &&
(pair->_nodeNumber != region->getNumber()))
{
this->_temp->empty();
if (genBitVector)
*this->_temp |= *genBitVector;
if (exceptionGenBitVector)
*this->_temp |= *exceptionGenBitVector;
Container *killForThisExit = analysisInfo->getContainer(analysisInfo->_regularKillSetInfo, pair->_nodeNumber);
if (killForThisExit)
*this->_temp -= *killForThisExit;
Container *genForThisExit = analysisInfo->getContainer(analysisInfo->_regularGenSetInfo, pair->_nodeNumber);
if (genForThisExit)
*this->_temp |= *genForThisExit;
compose((pair->_container), this->_temp);
}
}
}
if (analysisInfo->_regularKillSetInfo)
{
for (pair = analysisInfo->_regularKillSetInfo->getFirst(); pair; pair = pair->getNext())
{
if (pair->_container &&
(pair->_nodeNumber != region->getNumber()))
{
this->_temp->empty();
if (killBitVector)
*this->_temp |= *killBitVector;
if (exceptionKillBitVector)
*this->_temp |= *exceptionKillBitVector;
Container *genForThisExit = analysisInfo->getContainer(analysisInfo->_regularGenSetInfo, pair->_nodeNumber);
if (genForThisExit)
*this->_temp -= *genForThisExit;
Container *killForThisExit = analysisInfo->getContainer(analysisInfo->_regularKillSetInfo, pair->_nodeNumber);
if (killForThisExit)
*this->_temp |= *killForThisExit;
inverseCompose((pair->_container), this->_temp);
}
}
}
if (analysisInfo->_exceptionGenSetInfo)
{
for (pair = analysisInfo->_exceptionGenSetInfo->getFirst(); pair; pair = pair->getNext())
{
if (pair->_container &&
(pair->_nodeNumber != region->getNumber()))
{
this->_temp->empty();
if (genBitVector)
*this->_temp |= *genBitVector;
if (exceptionGenBitVector)
*this->_temp |= *exceptionGenBitVector;
Container *killForThisExit = analysisInfo->getContainer(analysisInfo->_exceptionKillSetInfo, pair->_nodeNumber);
if (killForThisExit)
*this->_temp -= *killForThisExit;
Container *genForThisExit = analysisInfo->getContainer(analysisInfo->_exceptionGenSetInfo, pair->_nodeNumber);
if (genForThisExit)
*this->_temp |= *genForThisExit;
compose((pair->_container), this->_temp);
}
}
}
if (analysisInfo->_exceptionKillSetInfo)
{
for (pair = analysisInfo->_exceptionKillSetInfo->getFirst(); pair; pair = pair->getNext())
{
if (pair->_container &&
(pair->_nodeNumber != region->getNumber()))
{
this->_temp->empty();
if (killBitVector)
*this->_temp |= *killBitVector;
if (exceptionKillBitVector)
*this->_temp |= *exceptionKillBitVector;
Container *genForThisExit = analysisInfo->getContainer(analysisInfo->_exceptionGenSetInfo, pair->_nodeNumber);
if (genForThisExit)
*this->_temp -= *genForThisExit;
Container *killForThisExit = analysisInfo->getContainer(analysisInfo->_exceptionKillSetInfo, pair->_nodeNumber);
if (killForThisExit)
*this->_temp |= *killForThisExit;
inverseCompose((pair->_container), this->_temp);
}
}
}
}
// Use pendingList to remember which exit nodes have already been seen
// when merging the out information for the region.
//
pendingList.Clear();
}
template<class Container>void TR_ForwardDFSetAnalysis<Container *>::initializeGenAndKillSetInfo(TR_RegionStructure *regionStructure, TR::BitVector &pendingList)
{
while (this->_analysisQueue.getListHead() &&
(this->_analysisQueue.getListHead()->getData()->getStructure() != regionStructure))
{
if (!this->_analysisInterrupted)
{
numIterations++;
if ((numIterations % 20) == 0)
{
numIterations = 0;
if (this->comp()->compilationShouldBeInterrupted(FBVA_INITIALIZE_CONTEXT))
this->_analysisInterrupted = true;
}
}
if (this->_analysisInterrupted)
{
TR::Compilation *comp = this->comp();
comp->failCompilation<TR::CompilationInterrupted>("interrupted in forward bit vector analysis");
}
TR::CFGNode *node = this->_analysisQueue.getListHead()->getData();
TR_StructureSubGraphNode *nodeStructure = (TR_StructureSubGraphNode *) node;
if (!pendingList.ValueAt(nodeStructure->getStructure()->getNumber()) &&
(*(this->_changedSetsQueue.getListHead()->getData()) == 0))
{
this->removeHeadFromAnalysisQueue();
continue;
}
if (this->traceBVA())
traceMsg(this->comp(), "Gen : Begin analyzing node %p numbered %d in region %p (%d)\n", nodeStructure->getStructure(), node->getNumber(), regionStructure, regionStructure->getNumber());
bool alreadyVisitedNode = false;
if (this->_nodesInCycle->ValueAt(nodeStructure->getNumber()))
alreadyVisitedNode = true;
(*(this->_nodesInCycle))[nodeStructure->getNumber()] = true;
if (node != regionStructure->getEntry())
initializeCurrentGenKillSetInfo();
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = this->getAnalysisInfo(regionStructure);
if (node != regionStructure->getEntry())
{
TR::list<TR::CFGEdge*> predList(node->getPredecessors());
predList.insert(predList.end(), node->getExceptionPredecessors().begin(), node->getExceptionPredecessors().end());
bool firstPred = true;
bool stopAnalyzingThisNode = false;
int count = 0;
for (auto pred = predList.begin(); pred != predList.end(); ++pred)
{
bool normalPred = (++count <= node->getPredecessors().size());
TR_StructureSubGraphNode *predNode = (TR_StructureSubGraphNode *) (*pred)->getFrom();
TR_Structure *predStructure = predNode->getStructure();
if (pendingList.ValueAt(predStructure->getNumber()) && (!alreadyVisitedNode))
{
this->removeHeadFromAnalysisQueue();
this->addToAnalysisQueue(predNode, 0);
stopAnalyzingThisNode = true;
break;
}
if (pendingList.ValueAt(predStructure->getNumber()) && !predStructure->hasBeenAnalyzedBefore()) //_firstIteration)
{
}
else
{
Container *predBitVector = NULL;
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *predInfo = this->getAnalysisInfo(predStructure);
int32_t nodeNumber = predStructure->asRegion()? node->getNumber() : predNode->getNumber();
TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>
*predCurrentGenSetInfo = normalPred ? predInfo->_currentRegularGenSetInfo : predInfo->_currentExceptionGenSetInfo,
*predCurrentKillSetInfo = normalPred ? predInfo->_currentRegularKillSetInfo : predInfo->_currentExceptionKillSetInfo;
predBitVector = predInfo->getContainer(predCurrentGenSetInfo, nodeNumber);
if (predBitVector)
compose(_currentRegularGenSetInfo, predBitVector);
predBitVector = predInfo->getContainer(predCurrentKillSetInfo, nodeNumber);
if (predBitVector)
inverseCompose(_currentRegularKillSetInfo, predBitVector);
}
firstPred = false;
if (this->traceBVA())
{
dumpOptDetails(this->comp(), "Node %p (%d) pred %p (%d)\n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber(), predStructure, predStructure->getNumber());
_currentRegularGenSetInfo->print(this->comp());
dumpOptDetails(this->comp(), "\n");
_currentRegularKillSetInfo->print(this->comp());
dumpOptDetails(this->comp(), "\n");
}
}
if (stopAnalyzingThisNode)
continue;
}
if (node == regionStructure->getEntry())
{
{
_currentRegularGenSetInfo->empty();
_currentRegularKillSetInfo->empty();
}
}
Container *temp1;
Container *temp2;
this->allocateTempContainer(&temp1, _currentRegularGenSetInfo);
this->allocateTempContainer(&temp2, _currentRegularKillSetInfo);
*temp1 = *_currentRegularGenSetInfo;
*temp2 = *_currentRegularKillSetInfo;
bool checkForChange = !regionStructure->isAcyclic();
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *nodeInfo = this->getAnalysisInfo(nodeStructure->getStructure());
this->_nodesInCycle->Clear();
this->initializeGenAndKillSetInfoForStructure(nodeStructure->getStructure());
pendingList[nodeStructure->getStructure()->getNumber()] = false;
this->removeHeadFromAnalysisQueue();
*_currentRegularGenSetInfo = *temp1;
*_currentRegularKillSetInfo = *temp2;
if (this->traceBVA())
{
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair;
if (nodeInfo->_regularGenSetInfo)
{
traceMsg(this->comp(), "\nGen Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = nodeInfo->_regularGenSetInfo->getFirst(); pair; pair = pair->getNext())
{
if (pair->_container)
{
traceMsg(this->comp(), "Exit or Succ numbered %d : ", pair->_nodeNumber);
pair->_container->print(this->comp());
traceMsg(this->comp(), "\n");
}
}
traceMsg(this->comp(), "\n");
}
if (nodeInfo->_regularKillSetInfo)
{
traceMsg(this->comp(), "\nKill Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = nodeInfo->_regularKillSetInfo->getFirst(); pair; pair = pair->getNext())
{
if (pair->_container)
{
traceMsg(this->comp(), "Exit or Succ numbered %d : ", pair->_nodeNumber);
pair->_container->print(this->comp());
traceMsg(this->comp(), "\n");
}
}
traceMsg(this->comp(), "\n");
}
}
*this->_temp = *_currentRegularGenSetInfo;
*this->_temp2 = *_currentRegularKillSetInfo;
TR::list<TR::CFGEdge*> succList(node->getSuccessors());
succList.insert(succList.end(), node->getExceptionSuccessors().begin(), node->getExceptionSuccessors().end());
int count = 0;
for (auto succ = succList.begin(); succ != succList.end(); ++succ)
{
bool normalSucc = (++count <= node->getSuccessors().size());
TR::CFGNode *succNode = (*succ)->getTo();
*_currentRegularGenSetInfo = *this->_temp;
*_currentRegularKillSetInfo = *this->_temp2;
TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>
*_nodeGenSetInfo = normalSucc ? nodeInfo->_regularGenSetInfo : nodeInfo->_exceptionGenSetInfo,
*_nodeKillSetInfo = normalSucc ? nodeInfo->_regularKillSetInfo : nodeInfo->_exceptionKillSetInfo;
Container *genBitVector = NULL, *killBitVector = NULL;
int32_t nodeNumber =
nodeStructure->getStructure()->asRegion() ? succNode->getNumber() : node->getNumber();
genBitVector = nodeInfo->getContainer(_nodeGenSetInfo, nodeNumber);
killBitVector = nodeInfo->getContainer(_nodeKillSetInfo, nodeNumber);
if (killBitVector)
*_currentRegularGenSetInfo -= *killBitVector;
if (genBitVector)
*_currentRegularGenSetInfo |= *genBitVector;
if (genBitVector)
*_currentRegularKillSetInfo -= *genBitVector;
if (killBitVector)
*_currentRegularKillSetInfo |= *killBitVector;
if (regionStructure->isExitEdge(*succ) || (succNode == regionStructure->getEntry()))
{
TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>
*_genSetInfo = normalSucc ? analysisInfo->_regularGenSetInfo : analysisInfo->_exceptionGenSetInfo,
*_killSetInfo = normalSucc ? analysisInfo->_regularKillSetInfo : analysisInfo->_exceptionKillSetInfo;
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair =
analysisInfo->getContainerNodeNumberPair(_genSetInfo, succNode->getNumber());
if (!pair)
{
pair = _genSetInfo->getFirst();
TR_ASSERT(!pair->getNext(), "There should be only one successor info\n");
TR_ASSERT((pair->_nodeNumber == node->getNumber()), "Node number inconsistent\n");
}
TR_ASSERT(pair, "At least one successor info must be found\n");
if (!pair->_container)
{
pair->_container = initializeInfo(NULL);
}
compose(pair->_container, _currentRegularGenSetInfo);
pair = analysisInfo->getContainerNodeNumberPair(_killSetInfo, succNode->getNumber());
if (!pair)
{
pair = _killSetInfo->getFirst();
TR_ASSERT(!pair->getNext(), "There should be only one successor info\n");
TR_ASSERT((pair->_nodeNumber == node->getNumber()), "Node number inconsistent\n");
}
TR_ASSERT(pair, "At least one successor info must be found\n");
if (!pair->_container)
{
pair->_container = inverseInitializeInfo(NULL);
}
inverseCompose(pair->_container, _currentRegularKillSetInfo);
}
else
{
TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>
*_currentGenSetInfo = normalSucc ? nodeInfo->_currentRegularGenSetInfo : nodeInfo->_currentExceptionGenSetInfo,
*_currentKillSetInfo = normalSucc ? nodeInfo->_currentRegularKillSetInfo : nodeInfo->_currentExceptionKillSetInfo;
if (!_currentGenSetInfo)
TR_ASSERT(0, "Gen set info should have been allocated in initialization step\n");
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = NULL;
pair = nodeInfo->getContainerNodeNumberPair(_currentGenSetInfo, nodeNumber);
if (!pair)
{
pair = nodeInfo->_currentRegularGenSetInfo->getFirst();
TR_ASSERT(!pair->getNext(), "There should be only one successor info\n");
TR_ASSERT((pair->_nodeNumber == node->getNumber()), "Node number inconsistent\n");
}
TR_ASSERT(pair, "At least one successor info must be found\n");
if (!pair->_container)
{
pair->_container = initializeInfo(NULL);
}
compose(pair->_container, _currentRegularGenSetInfo);
pair = nodeInfo->getContainerNodeNumberPair(_currentKillSetInfo, nodeNumber);
if (!pair)
{
pair = _currentKillSetInfo->getFirst();
TR_ASSERT(!pair->getNext(), "There should be only one successor info\n");
TR_ASSERT((pair->_nodeNumber == node->getNumber()), "Node number inconsistent\n");
}
TR_ASSERT(pair, "At least one successor info must be found\n");
if (!pair->_container)
{
pair->_container = inverseInitializeInfo(NULL);
}
inverseCompose(pair->_container, _currentRegularKillSetInfo);
}
if ((!regionStructure->isExitEdge(*succ)) &&
(pendingList.ValueAt(succNode->getNumber())))
{
this->_nodesInCycle->Clear();
this->addToAnalysisQueue(toStructureSubGraphNode(succNode), 1);
}
}
}
}
template<class Container>void TR_ForwardDFSetAnalysis<Container *>::initializeGenAndKillSetInfoForBlock(TR_BlockStructure *s)
{
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = this->getAnalysisInfo(s);
if (!s->hasBeenAnalyzedBefore())
s->setAnalyzedStatus(true);
else
return;
analysisInfo->_regularGenSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *
pair = new (this->trStackMemory())
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(this->_regularGenSetInfo[s->getNumber()], s->getNumber());
analysisInfo->_regularGenSetInfo->add(pair);
analysisInfo->_regularKillSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
pair = new (this->trStackMemory())
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(this->_regularKillSetInfo[s->getNumber()], s->getNumber());
analysisInfo->_regularKillSetInfo->add(pair);
analysisInfo->_exceptionGenSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
pair = new (this->trStackMemory())
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(this->_exceptionGenSetInfo[s->getNumber()], s->getNumber());
analysisInfo->_exceptionGenSetInfo->add(pair);
analysisInfo->_exceptionKillSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
pair = new (this->trStackMemory())
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(this->_exceptionKillSetInfo[s->getNumber()], s->getNumber());
analysisInfo->_exceptionKillSetInfo->add(pair);
analysisInfo->_currentRegularGenSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, s->getNumber());
analysisInfo->_currentRegularGenSetInfo->add(pair);
analysisInfo->_currentRegularKillSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, s->getNumber());
analysisInfo->_currentRegularKillSetInfo->add(pair);
analysisInfo->_currentExceptionGenSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, s->getNumber());
analysisInfo->_currentExceptionGenSetInfo->add(pair);
analysisInfo->_currentExceptionKillSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, s->getNumber());
analysisInfo->_currentExceptionKillSetInfo->add(pair);
}
template<class Container>typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *TR_BasicDFSetAnalysis<Container *>::getAnalysisInfo(TR_Structure *s)
{
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = (typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *)s->getAnalysisInfo();
if (!s->hasBeenAnalyzedBefore())
{
if (analysisInfo == NULL)
{
analysisInfo = createAnalysisInfo();
initializeAnalysisInfo(analysisInfo, s);
s->setAnalysisInfo(analysisInfo);
}
else
clearAnalysisInfo(analysisInfo);
}
return analysisInfo;
}
template<class Container>typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *TR_BasicDFSetAnalysis<Container *>::createAnalysisInfo()
{
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo;
analysisInfo->_inSetInfo = initializeInfo(NULL);
analysisInfo->_outSetInfo = new (this->trStackMemory()) TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>;
analysisInfo->_outSetInfo->setFirst(NULL);
analysisInfo->_regularGenSetInfo = NULL;
analysisInfo->_regularKillSetInfo = NULL;
analysisInfo->_exceptionGenSetInfo = NULL;
analysisInfo->_exceptionKillSetInfo = NULL;
analysisInfo->_currentRegularGenSetInfo = NULL;
analysisInfo->_currentRegularKillSetInfo = NULL;
analysisInfo->_currentExceptionGenSetInfo = NULL;
analysisInfo->_currentExceptionKillSetInfo = NULL;
analysisInfo->_containsExceptionTreeTop = false;
return analysisInfo;
}
template<class Container>void TR_BasicDFSetAnalysis<Container *>::initializeAnalysisInfo(typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *info, TR_Structure *s)
{
TR_RegionStructure *region = s->asRegion();
if (region)
initializeAnalysisInfo(info, region);
else
initializeAnalysisInfo(info, s->asBlock()->getBlock());
}
template<class Container>void TR_BasicDFSetAnalysis<Container *>::initializeAnalysisInfo(typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *info, TR::Block *block)
{
TR::list<TR::CFGEdge*> succList(block->getSuccessors());
succList.insert(succList.end() , block->getExceptionSuccessors().begin(), block->getExceptionSuccessors().end());
for (auto succ = succList.begin(); succ != succList.end(); ++succ)
{
TR::CFGNode* succBlock = (*succ)->getTo();
Container *b = initializeInfo(NULL);
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, succBlock->getNumber());
info->_outSetInfo->add(pair);
}
}
template<class Container>void TR_BasicDFSetAnalysis<Container *>::initializeAnalysisInfo(typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *info, TR_RegionStructure *region)
{
TR::BitVector exitNodes(comp()->allocator());
//
// Copy the current out set for comparison the next time we analyze this region
//
//
if (region != this->_cfg->getStructure())
{
ListIterator<TR::CFGEdge> ei(®ion->getExitEdges());
for (TR::CFGEdge *edge = ei.getCurrent(); edge != NULL; edge = ei.getNext())
{
int32_t toStructureNumber = edge->getTo()->getNumber();
if (!exitNodes.ValueAt(toStructureNumber))
{
Container *b = initializeInfo(NULL);