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BackwardBitVectorAnalysis.cpp
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/*******************************************************************************
* Copyright (c) 2000, 2019 IBM Corp. and others
*
* This program and the accompanying materials are made available under
* the terms of the Eclipse Public License 2.0 which accompanies this
* distribution and is available at http://eclipse.org/legal/epl-2.0
* or the Apache License, Version 2.0 which accompanies this distribution
* and is available at https://www.apache.org/licenses/LICENSE-2.0.
*
* This Source Code may also be made available under the following Secondary
* Licenses when the conditions for such availability set forth in the
* Eclipse Public License, v. 2.0 are satisfied: GNU General Public License,
* version 2 with the GNU Classpath Exception [1] and GNU General Public
* License, version 2 with the OpenJDK Assembly Exception [2].
*
* [1] https://www.gnu.org/software/classpath/license.html
* [2] http://openjdk.java.net/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0 WITH Classpath-exception-2.0 OR LicenseRef-GPL-2.0 WITH Assembly-exception
*******************************************************************************/
#include <stddef.h>
#include <stdint.h>
#include "compile/Compilation.hpp"
#include "env/TRMemory.hpp"
#include "il/Block.hpp"
#include "il/Node.hpp"
#include "il/TreeTop.hpp"
#include "il/TreeTop_inlines.hpp"
#include "infra/Assert.hpp"
#include "infra/Link.hpp"
#include "infra/List.hpp"
#include "infra/CfgEdge.hpp"
#include "infra/CfgNode.hpp"
#include "optimizer/Structure.hpp"
#include "optimizer/DataFlowAnalysis.hpp"
class TR_BitVector;
#define MAX_CASES_FOR_STACK_ALLOCATION 16
static int32_t numIterations = 0;
// This file contains the methods specifying the backward
// bit vector analysis rules for each structure. Also contain
// definitions of other methods in class BackwardBitVectorAnalysis.
//
//
template<class Container>void TR_BackwardDFSetAnalysis<Container *>::initializeDFSetAnalysis()
{
this->initializeBasicDFSetAnalysis();
_currentOutSetInfo = (Container **)this->trMemory()->allocateStackMemory(this->_numberOfNodes*sizeof(Container *));
_originalOutSetInfo = (Container **)this->trMemory()->allocateStackMemory(this->_numberOfNodes*sizeof(Container *));
for (int32_t i=0;i<this->_numberOfNodes;i++)
{
this->allocateContainer(&_currentOutSetInfo[i]);
this->allocateContainer(&_originalOutSetInfo[i]);
}
}
template<class Container>bool TR_BackwardDFSetAnalysis<Container *>::canGenAndKillForStructure(TR_Structure *nodeStructure)
{
// Turn off for this release to minimize risk
//
//if (!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_PredecessorIterator predecessors(entryNode);
for (auto pred = predecessors.getFirst(); pred; pred = predecessors.getNext())
{
TR_StructureSubGraphNode *predNode = (TR_StructureSubGraphNode *) pred->getFrom();
bool exitEdgeSeen = false;
TR_SuccessorIterator successors(predNode);
for (auto succ = successors.getFirst(); succ; succ = successors.getNext())
{
if (!naturalLoop->isExitEdge(succ))
{
if (succ->getTo() != entryNode)
{
naturalLoop->setContainsImproperRegion(true);
break;
}
}
else
exitEdgeSeen = true;
}
if (!exitEdgeSeen)
naturalLoop->setContainsImproperRegion(true);
}
TR_BitVector seenExitNodes(this->comp()->trMemory()->currentStackRegion());
ListIterator<TR::CFGEdge> ei(&naturalLoop->getExitEdges());
for (TR::CFGEdge *edge = ei.getCurrent(); edge != NULL; edge = ei.getNext())
{
TR::CFGNode *toNode = edge->getTo();
if (seenExitNodes.get(toNode->getNumber()))
continue;
seenExitNodes.set(toNode->getNumber());
bool seenNonBackEdge = false;
bool seenLoopBackEdge = false;
TR_PredecessorIterator predecessors(toNode);
for (auto pred = predecessors.getFirst(); pred; pred = predecessors.getNext())
{
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_BackwardDFSetAnalysis<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>;
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>;
TR::Block *block = s->asBlock()->getBlock();
for (auto succ = block->getSuccessors().begin(); succ != block->getSuccessors().end(); ++succ)
{
TR::CFGNode* succBlock = (*succ)->getTo();
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, succBlock->getNumber());
analysisInfo->_currentRegularGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, succBlock->getNumber());
analysisInfo->_currentRegularKillSetInfo->add(pair);
}
for (auto succ = block->getExceptionSuccessors().begin(); succ != block->getExceptionSuccessors().end(); ++succ)
{
TR::CFGNode* succBlock = (*succ)->getTo();
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, succBlock->getNumber());
analysisInfo->_currentExceptionGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, succBlock->getNumber());
analysisInfo->_currentExceptionKillSetInfo->add(pair);
}
}
template<class Container>void TR_BackwardDFSetAnalysis<Container *>::initializeGenAndKillSetInfo(TR_RegionStructure *regionStructure, TR_BitVector &pendingList, TR_BitVector &exitNodes, bool lastIteration)
{
while (this->_analysisQueue.getListHead() &&
(this->_analysisQueue.getListHead()->getData()->getStructure() != regionStructure))
{
if (!this->_analysisInterrupted)
{
numIterations++;
if ((numIterations % 20) == 0)
{
numIterations = 0;
if (this->comp()->compilationShouldBeInterrupted(BBVA_INITIALIZE_CONTEXT))
this->_analysisInterrupted = true;
}
}
if (this->_analysisInterrupted)
{
TR::Compilation *comp = this->comp();
comp->failCompilation<TR::CompilationInterrupted>("interrupted in backward bit vector analysis");
}
TR::CFGNode *node = this->_analysisQueue.getListHead()->getData();
TR_StructureSubGraphNode *nodeStructure = (TR_StructureSubGraphNode *) node;
if (!pendingList.get(nodeStructure->getStructure()->getNumber()) &&
(*(this->_changedSetsQueue.getListHead()->getData()) == 0))
{
this->removeHeadFromAnalysisQueue();
continue;
}
if (traceBBVA())
traceMsg(this->comp(), "Begin analyzing node %p numbered %d\n", node, node->getNumber());
bool alreadyVisitedNode = false;
if (this->_nodesInCycle->get(nodeStructure->getNumber()))
alreadyVisitedNode = true;
this->_nodesInCycle->set(nodeStructure->getNumber());
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = this->getAnalysisInfo(nodeStructure->getStructure());
if (!exitNodes.get(node->getNumber()))
{
initializeCurrentGenKillSetInfo();
}
TR_BitVector seenSuccNodes(this->comp()->trMemory()->currentStackRegion());
TR_BitVector seenNodes(this->comp()->trMemory()->currentStackRegion());
{
TR_SuccessorIterator successors(nodeStructure);
bool firstSucc = true;
bool stopAnalyzingThisNode = false;
for (auto succ = successors.getFirst(); succ; succ = successors.getNext())
{
if (!regionStructure->isExitEdge(succ))
{
TR_StructureSubGraphNode *succNode = (TR_StructureSubGraphNode *) succ->getTo();
TR_Structure *succStructure = succNode->getStructure();
if ((regionStructure->getEntry() == succNode) ||
exitNodes.get(succNode->getNumber()))
continue;
if ((pendingList.get(succStructure->getNumber()) && (!alreadyVisitedNode)) /* &&
(regionStructure->getEntry() != succNode)*/)
{
this->removeHeadFromAnalysisQueue();
this->addToAnalysisQueue(succNode, 0);
stopAnalyzingThisNode = true;
break;
}
if (pendingList.get(succStructure->getNumber()) && !succStructure->hasBeenAnalyzedBefore()) //_firstIteration)
{
TR_ASSERT(0, "Should not reach here\n");
}
else
{
seenSuccNodes.set(succStructure->getNumber());
Container *succBitVector = NULL;
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *succInfo = this->getAnalysisInfo(succStructure);
}
}
firstSucc = false;
}
if (stopAnalyzingThisNode)
continue;
firstSucc = false;
}
bool checkForChange = !regionStructure->isAcyclic();
this->_nodesInCycle->empty();
this->initializeGenAndKillSetInfoForStructure(nodeStructure->getStructure());
pendingList.reset(node->getNumber());
this->removeHeadFromAnalysisQueue();
if (traceBBVA())
{
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair;
if (analysisInfo->_regularGenSetInfo)
{
traceMsg(this->comp(), "\nGen Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = analysisInfo->_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 (analysisInfo->_regularKillSetInfo)
{
traceMsg(this->comp(), "\nKill Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = analysisInfo->_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");
}
if (analysisInfo->_exceptionGenSetInfo)
{
traceMsg(this->comp(), "\nException Gen Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = analysisInfo->_exceptionGenSetInfo->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 (analysisInfo->_exceptionKillSetInfo)
{
traceMsg(this->comp(), "\nException Kill Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = analysisInfo->_exceptionKillSetInfo->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");
}
}
bool isBlockStructure = false;
if (nodeStructure->getStructure()->asBlock())
isBlockStructure = true;
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *regionAnalysisInfo = this->getAnalysisInfo(regionStructure);
TR_SuccessorIterator successors(nodeStructure);
int count = 0;
for (auto succ = successors.getFirst(); succ; succ = successors.getNext())
{
int32_t nodeNumber = succ->getTo()->getNumber();
bool normalSucc = (++count <= nodeStructure->getSuccessors().size());
TR_LinkHead<typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair>
*_killSetInfo = normalSucc ? analysisInfo->_regularKillSetInfo : analysisInfo->_exceptionKillSetInfo,
*_regionKillSetInfo = normalSucc ? regionAnalysisInfo->_regularKillSetInfo : regionAnalysisInfo->_exceptionKillSetInfo,
*_currentKillSetInfo = normalSucc ? analysisInfo->_currentRegularKillSetInfo : regionAnalysisInfo->_currentExceptionKillSetInfo,
*_genSetInfo = normalSucc ? analysisInfo->_regularGenSetInfo : analysisInfo->_exceptionGenSetInfo,
*_regionGenSetInfo = normalSucc ? regionAnalysisInfo->_regularGenSetInfo : regionAnalysisInfo->_exceptionGenSetInfo,
*_currentGenSetInfo = normalSucc ? analysisInfo->_currentRegularGenSetInfo : regionAnalysisInfo->_currentExceptionGenSetInfo;
Container *killBitVector =
analysisInfo->getContainer(_killSetInfo, isBlockStructure ? node->getNumber() : nodeNumber);
Container *genBitVector =
analysisInfo->getContainer(_genSetInfo, isBlockStructure ? node->getNumber() : nodeNumber);
if (!seenSuccNodes.get(nodeNumber))
{
this->_temp->empty();
if (genBitVector)
*this->_temp |= *genBitVector;
this->_temp2->empty();
if (killBitVector)
*this->_temp2 |= *killBitVector;
if (node == regionStructure->getEntry())
{
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair =
regionAnalysisInfo->getContainerNodeNumberPair(_regionGenSetInfo, nodeNumber);
if (pair)
{
if (!pair->_container)
{
pair->_container = initializeInfo(NULL);
}
compose(pair->_container, this->_temp);
}
pair = regionAnalysisInfo->getContainerNodeNumberPair(_regionKillSetInfo, nodeNumber);
if (pair)
{
if (!pair->_container)
{
pair->_container = inverseInitializeInfo(NULL);
}
inverseCompose(pair->_container, this->_temp2);
}
}
else
{
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair =
analysisInfo->getContainerNodeNumberPair(_currentGenSetInfo, nodeNumber);
if (!pair)
{
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, nodeNumber);
_currentGenSetInfo->add(pair);
}
if (!pair->_container)
{
pair->_container = initializeInfo(NULL);
}
compose(pair->_container, this->_temp);
pair = analysisInfo->getContainerNodeNumberPair(_currentKillSetInfo, nodeNumber);
if (!pair)
{
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, nodeNumber);
_currentKillSetInfo->add(pair);
}
if (!pair->_container)
{
pair->_container = inverseInitializeInfo(NULL);
}
inverseCompose(pair->_container, this->_temp2);
}
continue;
}
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *succInfo = this->getAnalysisInfo(succ->getTo()->asStructureSubGraphNode()->getStructure());
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *nodePair;
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *killNodePair = succInfo->_currentRegularKillSetInfo->getFirst();
for (nodePair = succInfo->_currentRegularGenSetInfo->getFirst(); nodePair; nodePair = nodePair->getNext(), killNodePair = killNodePair->getNext())
{
if (nodePair->_container)
*this->_temp = *(nodePair->_container);
else
this->_temp->empty();
if (killBitVector)
*this->_temp -= *killBitVector;
if (genBitVector)
*this->_temp |= *genBitVector;
if (killNodePair->_container)
*this->_temp2 = *(killNodePair->_container);
else
this->_temp2->empty();
if (genBitVector)
*this->_temp2 -= *genBitVector;
if (killBitVector)
*this->_temp2 |= *killBitVector;
if (node == regionStructure->getEntry())
{
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = regionAnalysisInfo->getContainerNodeNumberPair(regionAnalysisInfo->_regularGenSetInfo, nodePair->_nodeNumber);
if (pair)
{
if (!pair->_container)
{
pair->_container = initializeInfo(NULL);
}
compose(pair->_container, this->_temp);
}
pair = regionAnalysisInfo->getContainerNodeNumberPair(regionAnalysisInfo->_regularKillSetInfo, nodePair->_nodeNumber);
if (pair)
{
if (!pair->_container)
{
pair->_container = inverseInitializeInfo(NULL);
}
inverseCompose(pair->_container, this->_temp2);
}
}
else
{
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = analysisInfo->getContainerNodeNumberPair(analysisInfo->_currentRegularGenSetInfo, nodePair->_nodeNumber);
if (!pair)
{
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, nodePair->_nodeNumber);
analysisInfo->_currentRegularGenSetInfo->add(pair);
}
if (!pair->_container)
{
pair->_container = initializeInfo(NULL);
}
compose(pair->_container, this->_temp);
pair = analysisInfo->getContainerNodeNumberPair(analysisInfo->_currentRegularKillSetInfo, nodePair->_nodeNumber);
if (!pair)
{
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, nodePair->_nodeNumber);
analysisInfo->_currentRegularKillSetInfo->add(pair);
}
if (!pair->_container)
{
pair->_container = inverseInitializeInfo(NULL);
}
inverseCompose(pair->_container, this->_temp2);
}
}
killNodePair = succInfo->_currentExceptionKillSetInfo->getFirst();
for (nodePair = succInfo->_currentExceptionGenSetInfo->getFirst(); nodePair; nodePair = nodePair->getNext(), killNodePair = killNodePair->getNext())
{
if (nodePair->_container)
*this->_temp = *(nodePair->_container);
else
this->_temp->empty();
if (killBitVector)
*this->_temp -= *killBitVector;
if (genBitVector)
*this->_temp |= *genBitVector;
if (killNodePair->_container)
*this->_temp2 = *(killNodePair->_container);
else
this->_temp2->empty();
if (genBitVector)
*this->_temp2 -= *genBitVector;
if (killBitVector)
*this->_temp2 |= *killBitVector;
if (node == regionStructure->getEntry())
{
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = regionAnalysisInfo->getContainerNodeNumberPair(regionAnalysisInfo->_exceptionGenSetInfo, nodePair->_nodeNumber);
if (pair)
{
if (!pair->_container)
{
pair->_container = initializeInfo(NULL);
}
compose(pair->_container, this->_temp);
}
pair = regionAnalysisInfo->getContainerNodeNumberPair(regionAnalysisInfo->_exceptionKillSetInfo, nodePair->_nodeNumber);
if (pair)
{
if (!pair->_container)
{
pair->_container = inverseInitializeInfo(NULL);
}
inverseCompose(pair->_container, this->_temp2);
}
}
else
{
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = analysisInfo->getContainerNodeNumberPair(analysisInfo->_currentExceptionGenSetInfo, nodePair->_nodeNumber);
if (!pair)
{
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, nodePair->_nodeNumber);
analysisInfo->_currentExceptionGenSetInfo->add(pair);
}
if (!pair->_container)
{
pair->_container = initializeInfo(NULL);
}
compose(pair->_container, this->_temp);
pair = analysisInfo->getContainerNodeNumberPair(analysisInfo->_currentExceptionKillSetInfo, nodePair->_nodeNumber);
if (!pair)
{
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(NULL, nodePair->_nodeNumber);
analysisInfo->_currentExceptionKillSetInfo->add(pair);
}
if (!pair->_container)
{
pair->_container = inverseInitializeInfo(NULL);
}
inverseCompose(pair->_container, this->_temp2);
}
}
}
if (traceBBVA())
{
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair;
if (analysisInfo->_currentRegularGenSetInfo)
{
traceMsg(this->comp(), "\nCurrent Gen Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = analysisInfo->_currentRegularGenSetInfo->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 (analysisInfo->_currentRegularKillSetInfo)
{
traceMsg(this->comp(), "\nCurrent Kill Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = analysisInfo->_currentRegularKillSetInfo->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 (analysisInfo->_currentExceptionGenSetInfo)
{
traceMsg(this->comp(), "\nCurrent Gen Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = analysisInfo->_currentExceptionGenSetInfo->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 (analysisInfo->_currentExceptionKillSetInfo)
{
traceMsg(this->comp(), "\nCurrent Kill Set Info for Region or Block : %p numbered %d is : \n", nodeStructure->getStructure(), nodeStructure->getStructure()->getNumber());
for (pair = analysisInfo->_currentExceptionKillSetInfo->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");
}
}
TR_PredecessorIterator predecessors(nodeStructure);
for (auto pred = predecessors.getFirst(); pred; pred = predecessors.getNext())
{
TR_StructureSubGraphNode *predNode = (TR_StructureSubGraphNode *) pred->getFrom();
TR_Structure *predStructure = predNode->getStructure();
if (pendingList.get(predStructure->getNumber()))
{
//this->_compilation->incVisitCount();
this->_nodesInCycle->empty();
this->addToAnalysisQueue(toStructureSubGraphNode(predNode), 1);
}
}
}
}
template<class Container>void TR_BackwardDFSetAnalysis<Container *>::initializeGenAndKillSetInfoForRegion(TR_RegionStructure *region)
{
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = this->getAnalysisInfo(region);
if (!region->hasBeenAnalyzedBefore())
region->setAnalyzedStatus(true);
else
return;
TR_BitVector exitNodes(this->comp()->trMemory()->currentStackRegion());
TR_BitVector toNodes(this->comp()->trMemory()->currentStackRegion());
TR_StructureSubGraphNode *subNode;
TR::CFGEdge *edge;
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 (edge = ei.getCurrent(); edge != NULL; edge = ei.getNext())
{
int32_t fromStructureNumber = edge->getFrom()->getNumber();
int32_t toStructureNumber = edge->getTo()->getNumber();
if (!toNodes.get(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);
toNodes.set(toStructureNumber);
}
if (!exitNodes.get(toStructureNumber))
exitNodes.set(toStructureNumber);
}
TR_RegionStructure::Cursor si(*region);
for (subNode = si.getCurrent(); subNode != NULL; subNode = si.getNext())
{
if (subNode->getSuccessors().empty() && subNode->getExceptionSuccessors().empty())
{
int32_t fromStructureNumber = subNode->getNumber();
if (!exitNodes.get(fromStructureNumber))
{
Container *b = NULL;
// allocateContainer(&b);
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, fromStructureNumber);
analysisInfo->_regularGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, fromStructureNumber);
analysisInfo->_regularKillSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, fromStructureNumber);
analysisInfo->_exceptionGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, fromStructureNumber);
analysisInfo->_exceptionKillSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, fromStructureNumber);
analysisInfo->_currentRegularGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, fromStructureNumber);
analysisInfo->_currentRegularKillSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, fromStructureNumber);
analysisInfo->_currentExceptionGenSetInfo->add(pair);
pair = new (this->trStackMemory()) typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair(b, fromStructureNumber);
analysisInfo->_currentExceptionKillSetInfo->add(pair);
}
exitNodes.set(subNode->getNumber());
}
}
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()->trMemory()->currentStackRegion());
si.reset();
for (subNode = si.getCurrent(); subNode; subNode = si.getNext())
{
pendingList.set(subNode->getNumber());
}
bool changed = true;
int32_t numIterations = 1;
this->_firstIteration = true;
while (changed)
{
this->_nodesInCycle->empty();
changed = false;
if (traceBBVA())
traceMsg(this->comp(), "\nREGION : %p NUMBER : %d ITERATION NUMBER : %d\n", region, region->getNumber(), numIterations);
numIterations++;
ei.reset();
for (edge = ei.getCurrent(); edge != NULL; edge = ei.getNext())
{
TR_StructureSubGraphNode *edgeFrom = toStructureSubGraphNode(edge->getFrom());
this->addToAnalysisQueue(edgeFrom, 0);
initializeGenAndKillSetInfo(region, pendingList, exitNodes, !changed);
}
bool noExitEdges = region->getExitEdges().isEmpty();
si.reset();
for (subNode = si.getCurrent(); subNode; subNode = si.getNext())
{
if (noExitEdges || (subNode->getSuccessors().empty() && subNode->getExceptionSuccessors().empty()))
{
this->addToAnalysisQueue(subNode, 0);
initializeGenAndKillSetInfo(region, pendingList, exitNodes, !changed);
}
}
this->_firstIteration = false;
}
}
template<class Container>bool TR_BackwardDFSetAnalysis<Container *>::analyzeRegionStructure(TR_RegionStructure *regionStructure, bool checkForChange)
{
typename TR_BasicDFSetAnalysis<Container *>::ExtraAnalysisInfo *analysisInfo = NULL;
if (regionStructure == this->_cfg->getStructure())
analysisInfo = this->getAnalysisInfo(regionStructure);
// Use information from last time we analyzed this structure; if
// analyzing for the first time, initialize information
//
if (!regionStructure->hasBeenAnalyzedBefore())
regionStructure->setAnalyzedStatus(true);
else
{
analysisInfo = this->getAnalysisInfo(regionStructure);
bool sameAsPreviousIteration = true;
typename TR_BasicDFSetAnalysis<Container *>::TR_ContainerNodeNumberPair *pair;
for (pair = analysisInfo->_outSetInfo->getFirst(); pair; pair = pair->getNext())
{
if (!(*_currentOutSetInfo[pair->_nodeNumber] == *(pair->_container)))
{
sameAsPreviousIteration = false;
break;
}
}
if (sameAsPreviousIteration)
{
if (traceBBVA())
{
traceMsg(this->comp(), "\nSkipping re-analysis of Region : %p numbered %d\n", regionStructure, regionStructure->getNumber());
}
return false;
}
}
if (!analysisInfo)
analysisInfo = this->getAnalysisInfo(regionStructure);
TR_BitVector exitNodes(this->comp()->trMemory()->currentStackRegion());
TR_RegionStructure::Cursor si(*regionStructure);
ListIterator<TR::CFGEdge> ei(®ionStructure->getExitEdges());
TR_StructureSubGraphNode *subNode;
TR::CFGEdge *edge;
//
// Copy the current out set for comparison the next time we analyze this region
//
//
ei.reset();
for (edge = ei.getCurrent(); edge != NULL; edge = ei.getNext())
{
TR_StructureSubGraphNode *edgeFrom = toStructureSubGraphNode(edge->getFrom());
int32_t fromStructureNumber = edgeFrom->getStructure()->getNumber();
int32_t toStructureNumber = edge->getTo()->getNumber();
Container *outBitVector = analysisInfo->getContainer(analysisInfo->_outSetInfo, toStructureNumber);
if (outBitVector != NULL)
this->copyFromInto(_currentOutSetInfo[toStructureNumber], outBitVector);
exitNodes.set(fromStructureNumber);
}
si.reset();
for (subNode = si.getCurrent(); subNode != NULL; subNode = si.getNext())
{
if (subNode->getSuccessors().empty() && subNode->getExceptionSuccessors().empty())
exitNodes.set(subNode->getNumber());
}
TR_BitVector pendingList(this->comp()->trMemory()->currentStackRegion());
si.reset();
for (subNode = si.getCurrent(); subNode; subNode = si.getNext())
pendingList.set(subNode->getNumber());
bool changed = true;
int32_t numIterations = 1;
this->_firstIteration = true;
while (changed)
{
this->_nodesInCycle->empty();
changed = false;
if (traceBBVA())
traceMsg(this->comp(), "\nREGION : %p NUMBER : %d ITERATION NUMBER : %d\n", regionStructure, regionStructure->getNumber(), numIterations);
numIterations++;
ei.reset();
for (edge = ei.getCurrent(); edge != NULL; edge = ei.getNext())
{
TR_StructureSubGraphNode *edgeFrom = toStructureSubGraphNode(edge->getFrom());
this->addToAnalysisQueue(edgeFrom, 0);
if (analyzeNodeIfSuccessorsAnalyzed(regionStructure, pendingList, exitNodes))
{
if (!this->supportsGenAndKillSets() ||
!canGenAndKillForStructure(regionStructure))
changed = true;
}
}
bool noExitEdges = regionStructure->getExitEdges().isEmpty();
si.reset();
for (subNode = si.getCurrent(); subNode; subNode = si.getNext())
{
if (noExitEdges || (subNode->getSuccessors().empty() && subNode->getExceptionSuccessors().empty()))
{
this->addToAnalysisQueue(subNode, 0);
if (analyzeNodeIfSuccessorsAnalyzed(regionStructure, pendingList, exitNodes))
{
if (!this->supportsGenAndKillSets() ||
!canGenAndKillForStructure(regionStructure))
changed = true;
}
}
}
this->_firstIteration = false;
}
Container *inSetInfo = this->getAnalysisInfo(regionStructure->getEntry()->getStructure())->_inSetInfo;
if (checkForChange && !(*inSetInfo == *analysisInfo->_inSetInfo))
changed = true;
if (this->supportsGenAndKillSets() &&
(canGenAndKillForStructure(regionStructure) &&
regionStructure != this->_cfg->getStructure()))
{
if (!(*inSetInfo == *analysisInfo->_inSetInfo))