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ClassLookahead.cpp
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/*******************************************************************************
* Copyright IBM Corp. and others 2000
*
* 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 https://www.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] https://openjdk.org/legal/assembly-exception.html
*
* SPDX-License-Identifier: EPL-2.0 OR Apache-2.0 OR GPL-2.0-only WITH Classpath-exception-2.0 OR GPL-2.0-only WITH OpenJDK-assembly-exception-1.0
*******************************************************************************/
#include "ilgen/ClassLookahead.hpp"
#include "codegen/CodeGenerator.hpp"
#include "compile/Method.hpp"
#include "compile/ResolvedMethod.hpp"
#include "compiler/il/OMRTreeTop_inlines.hpp"
#include "env/ClassTableCriticalSection.hpp"
#include "env/IO.hpp"
#include "env/PersistentCHTable.hpp"
#include "il/Node.hpp"
#include "il/Node_inlines.hpp"
#include "il/TreeTop.hpp"
#include "ilgen/J9ByteCodeIlGenerator.hpp"
#include "ilgen/J9ByteCodeIterator.hpp"
#include "infra/Cfg.hpp"
TR_ClassLookahead::TR_ClassLookahead(
TR_PersistentClassInfo * classInfo, TR_FrontEnd * fe, TR::Compilation * comp,
TR::SymbolReferenceTable * symRefTab)
:
_classPointer((TR_OpaqueClassBlock *) classInfo->getClassId()),
_compilation(comp),
_symRefTab(symRefTab),
_fe(fe),
_currentMethodSymbol(NULL)
{
_classFieldInfo = new (PERSISTENT_NEW) TR_PersistentClassInfoForFields;
_classInfo = classInfo;
_classFieldInfo->setFirst(0);
_traceIt = comp->getOption(TR_TraceLookahead);
}
int32_t
TR_ClassLookahead::perform()
{
static bool allowClassLookahead = feGetEnv("TR_AllowClassLookahead") ? true : false;
TR_J9VMBase *fej9 = (TR_J9VMBase *)fe();
// Static analysis of static final fields is not possible because there are ways for
// such fields to change after initialization. The staticFinalFieldFolding opt is the
// safe way since it uses OSR to invalidate code after some operation changes a static
// final field. Therefore we are disabling this code by default!
if (!allowClassLookahead)
return 0;
if ((fej9->getNumInnerClasses(_classPointer) > 0) ||
_classInfo->cannotTrustStaticFinal())
return 0;
bool isClassInitialized = false;
bool seenFirstInitializerMethod = false;
bool allowForAOT = comp()->getOption(TR_UseSymbolValidationManager);
TR_PersistentClassInfo * classInfo =
comp()->getPersistentInfo()->getPersistentCHTable()->findClassInfoAfterLocking(_classPointer, comp(), allowForAOT);
if (classInfo && classInfo->isInitialized())
isClassInitialized = true;
if (!isClassInitialized)
return 0;
TR_ScratchList<TR_ResolvedMethod> resolvedMethodsInClass(comp()->trMemory());
fej9->getResolvedMethods(comp()->trMemory(), _classPointer, &resolvedMethodsInClass);
ListIterator<TR_ResolvedMethod> resolvedMethIt(&resolvedMethodsInClass);
TR_ResolvedMethod *resolvedMethod = NULL;
for (resolvedMethod = resolvedMethIt.getFirst(); resolvedMethod; resolvedMethod = resolvedMethIt.getNext())
{
if (resolvedMethod->isNative() ||
resolvedMethod->isJNINative() ||
resolvedMethod->isJITInternalNative())
{
_classInfo->setCannotTrustStaticFinal();
return 0;
}
}
bool b = comp()->getNeedsClassLookahead();
comp()->setNeedsClassLookahead(false);
int32_t len; char * name = fej9->getClassNameChars(_classPointer, len);
if (_traceIt)
printf("ATTN: Doing classlookahead for %.*s\n", len, name);
if (!performTransformation(comp(), "O^O CLASS LOOKAHEAD: Performing class lookahead for %s\n", name))
return 0;
TR_ScratchList<TR::ResolvedMethodSymbol> initializerMethodsInClass(comp()->trMemory());
TR_ScratchList<TR::ResolvedMethodSymbol> resolvedMethodSyms(comp()->trMemory());
TR::ResolvedMethodSymbol *classInitializer = NULL;
// check if peeking failed for any of the resolved methods
// if so, classLookahead cannot proceed
//
bool peekFailedForAnyMethod = false;
findInitializerMethods(&resolvedMethodsInClass, &initializerMethodsInClass, &resolvedMethodSyms, &classInitializer, &peekFailedForAnyMethod);
if (peekFailedForAnyMethod)
{
comp()->setNeedsClassLookahead(b);
_classInfo->setCannotTrustStaticFinal();
return 0;
}
_inClassInitializerMethod = false;
_inFirstInitializerMethod = false;
if (classInitializer)
{
_currentMethodSymbol = classInitializer;
_inClassInitializerMethod = true;
_inInitializerMethod = true;
_inFirstBlock = true;
///fprintf(stderr, "looking at method %s\n", classInitializer->getResolvedMethod()->nameChars()); fflush(stderr);
vcount_t visitCount = comp()->incVisitCount();
TR::TreeTop *tt;
comp()->resetVisitCounts(0, classInitializer->getFirstTreeTop());
for (tt = classInitializer->getFirstTreeTop(); tt; tt = tt->getNextTreeTop())
{
TR::Node *node = tt->getNode();
if (!examineNode(tt->getNextTreeTop(), NULL, NULL, -1, node, visitCount))
{
_classFieldInfo->setFirst(0);
_classInfo->setCannotTrustStaticFinal();
comp()->setNeedsClassLookahead(b);
return 2;
}
}
_inClassInitializerMethod = false;
}
ListIterator<TR::ResolvedMethodSymbol> resolvedIt(&initializerMethodsInClass);
TR::ResolvedMethodSymbol *resolvedMethodSymbol = NULL;
resolvedMethod = NULL;
for (resolvedMethodSymbol = resolvedIt.getFirst(); resolvedMethodSymbol; resolvedMethodSymbol = resolvedIt.getNext())
{
_currentMethodSymbol = resolvedMethodSymbol;
resolvedMethod = resolvedMethodSymbol->getResolvedMethod();
if (strncmp(resolvedMethod->nameChars(), "<clinit>", 8))
{
//_inInitializerMethod = false;
//if (findMethod(&initializerMethodsInClass, resolvedMethodSymbol))
{
if (!seenFirstInitializerMethod)
{
_inFirstInitializerMethod = true;
seenFirstInitializerMethod = true;
}
_inInitializerMethod = true;
if (!_inFirstInitializerMethod)
initializeFieldInfo();
}
/////fprintf(stderr, "looking at method %s\n", resolvedMethod->nameChars()); fflush(stderr);
TR::TreeTop *startTree = resolvedMethodSymbol->getFirstTreeTop();
_inFirstBlock = true;
vcount_t visitCount = comp()->incVisitCount();
TR::TreeTop *tt;
comp()->resetVisitCounts(0, startTree);
for (tt = startTree; tt; tt = tt->getNextTreeTop())
{
TR::Node *node = tt->getNode();
//dumpOptDetails("Node = %p node vc %d comp vc %d\n", node, node->getVisitCount(), visitCount);
if (!examineNode(tt->getNextTreeTop(), NULL, NULL, -1, node, visitCount))
{
_classFieldInfo->setFirst(0);
_classInfo->setCannotTrustStaticFinal();
comp()->setNeedsClassLookahead(b);
return 2;
}
}
if (_inInitializerMethod)
{
updateFieldInfo();
_inFirstInitializerMethod = false;
}
}
}
resolvedIt.set(&resolvedMethodSyms);
resolvedMethodSymbol = NULL;
resolvedMethod = NULL;
for (resolvedMethodSymbol = resolvedIt.getFirst(); resolvedMethodSymbol; resolvedMethodSymbol = resolvedIt.getNext())
{
_currentMethodSymbol = resolvedMethodSymbol;
resolvedMethod = resolvedMethodSymbol->getResolvedMethod();
if (strncmp(resolvedMethod->nameChars(), "<clinit>", 8))
{
if (!findMethod(&initializerMethodsInClass, resolvedMethodSymbol))
{
////fprintf(stderr, "looking at method %s\n", resolvedMethod->nameChars()); fflush(stderr);
_inInitializerMethod = false;
_inFirstInitializerMethod = false;
TR::TreeTop *startTree = resolvedMethodSymbol->getFirstTreeTop();
_inFirstBlock = true;
vcount_t visitCount = comp()->incVisitCount();
TR::TreeTop *tt;
comp()->resetVisitCounts(0, startTree);
for (tt = startTree; tt; tt = tt->getNextTreeTop())
{
TR::Node *node = tt->getNode();
//dumpOptDetails("Node = %p node vc %d comp vc %d\n", node, node->getVisitCount(), visitCount);
////fprintf(stderr, "looking at node in method %s\n", resolvedMethod->nameChars()); fflush(stderr);
if (!examineNode(tt->getNextTreeTop(), NULL, NULL, -1, node, visitCount))
{
_classFieldInfo->setFirst(0);
_classInfo->setCannotTrustStaticFinal();
comp()->setNeedsClassLookahead(b);
return 2;
}
}
}
}
}
if (_classFieldInfo->getFirst())
makeInfoPersistent();
classInfo->setFieldInfo(_classFieldInfo);
comp()->setNeedsClassLookahead(b);
return 2;
}
static bool isCalledByNonConstructorMethodsInClass(TR_ResolvedMethod *calleeMethod, List<TR::ResolvedMethodSymbol> *resolvedMethodSyms)
{
ListIterator<TR::ResolvedMethodSymbol> resolvedIt(resolvedMethodSyms);
TR::ResolvedMethodSymbol *resolvedMethodSymbol;
for (resolvedMethodSymbol = resolvedIt.getFirst(); resolvedMethodSymbol; resolvedMethodSymbol = resolvedIt.getNext())
{
TR_ResolvedMethod *resolvedMethod = resolvedMethodSymbol->getResolvedMethod();
if (!resolvedMethod->isConstructor())
{
for (TR::TreeTop *tt = resolvedMethodSymbol->getFirstTreeTop(); tt; tt = tt->getNextTreeTop())
{
TR::Node *node = tt->getNode();
if (node->getNumChildren() > 0 &&
node->getFirstChild()->getOpCode().isCall() &&
!node->getFirstChild()->getOpCode().isIndirect())
{
TR::Method *calleeMethod1 = node->getFirstChild()->getSymbol()->getMethodSymbol()->getMethod();
if (calleeMethod1 &&
calleeMethod1->nameLength() == calleeMethod->nameLength() &&
calleeMethod1->signatureLength() == calleeMethod->signatureLength() &&
calleeMethod1->classNameLength() == calleeMethod->classNameLength() &&
!strncmp(calleeMethod1->nameChars(), calleeMethod->nameChars(), calleeMethod->nameLength()) &&
!strncmp(calleeMethod1->signatureChars(), calleeMethod->signatureChars(), calleeMethod->signatureLength()) &&
!strncmp(calleeMethod1->classNameChars(), calleeMethod->classNameChars(), calleeMethod->classNameLength()))
return true;
}
}
}
}
return false;
}
void
TR_ClassLookahead::findInitializerMethods(List<TR_ResolvedMethod> *resolvedMethodsInClass, List<TR::ResolvedMethodSymbol> *initializerMethodsInClass, List<TR::ResolvedMethodSymbol> *resolvedMethodSyms, TR::ResolvedMethodSymbol **classInitializer, bool *peekFailedForAnyMethod)
{
TR_IlGenerator *prevIlGen = comp()->getCurrentIlGenerator();
ListIterator<TR_ResolvedMethod> resolvedIt(resolvedMethodsInClass);
TR_ResolvedMethod *resolvedMethod;
for (resolvedMethod = resolvedIt.getFirst(); resolvedMethod; resolvedMethod = resolvedIt.getNext())
{
TR::SymbolReference *methodSymRef;
if (resolvedMethod->isStatic())
methodSymRef = _symRefTab->findOrCreateMethodSymbol(JITTED_METHOD_INDEX, -1, resolvedMethod, TR::MethodSymbol::Static);
else
methodSymRef = _symRefTab->findOrCreateMethodSymbol(JITTED_METHOD_INDEX, -1, resolvedMethod, TR::MethodSymbol::Interface);
TR::ResolvedMethodSymbol *resolvedMethodSymbol = methodSymRef->getSymbol()->castToResolvedMethodSymbol();
if (resolvedMethod->isCompilable(comp()->trMemory()) && !resolvedMethod->isNewInstanceImplThunk() && !resolvedMethod->isJNINative())
{
resolvedMethodSyms->add(resolvedMethodSymbol);
//printf("IL gen succeeded for %s resolvedMethod %x ramMethod %x\n", resolvedMethod->signature(), resolvedMethod, resolvedMethod->getPersistentIdentifier());
_symRefTab->addParameters(resolvedMethodSymbol);
//ilGenSuccess = (0 != TR_J9ByteCodeIlGenerator::genMethodILForPeeking(resolvedMethodSymbol, comp()));
*peekFailedForAnyMethod = (NULL == resolvedMethodSymbol->getResolvedMethod()->genMethodILForPeeking(resolvedMethodSymbol, comp(), true));
}
}
if (*peekFailedForAnyMethod)
{
comp()->setCurrentIlGenerator(prevIlGen);
return;
}
ListIterator<TR::ResolvedMethodSymbol> resolvedMethodSymsIt(resolvedMethodSyms);
TR::ResolvedMethodSymbol *resolvedMethodSymbol;
for (resolvedMethodSymbol = resolvedMethodSymsIt.getFirst(); resolvedMethodSymbol; resolvedMethodSymbol = resolvedMethodSymsIt.getNext())
{
resolvedMethod = resolvedMethodSymbol->getResolvedMethod();
if ((resolvedMethod->isConstructor() || (!strncmp(resolvedMethod->nameChars(), "<clinit>", 8))) && resolvedMethodSymbol->getFirstTreeTop())
{
if (!strncmp(resolvedMethod->nameChars(), "<clinit>", 8))
*classInitializer = resolvedMethodSymbol;
else
{
TR::ResolvedMethodSymbol *initializerMethodSymbol = resolvedMethodSymbol;
TR::TreeTop * tt = resolvedMethodSymbol->getFirstTreeTop()->getNextRealTreeTop();
TR::Node *firstRealNode = tt->getNode();
if (firstRealNode->getOpCodeValue() == TR::treetop)
{
TR::Node *callChild = firstRealNode->getFirstChild();
if ((callChild->getOpCodeValue() == TR::call) &&
!callChild->getSymbolReference()->isUnresolved())
{
TR_ResolvedMethod *calleeMethod = callChild->getSymbol()->castToResolvedMethodSymbol()->getResolvedMethod();
if (!strncmp(calleeMethod->classNameChars(), "java/lang/Object", 16))
{
if (calleeMethod->isConstructor())
{
if (!strncmp(calleeMethod->signatureChars(), "()V", 3))
tt = tt->getNextRealTreeTop();
}
}
}
}
TR::Node *node = tt->getNode();
if (node->getOpCode().isTreeTop() &&
(node->getNumChildren() > 0))
node = node->getFirstChild();
if (node->getOpCode().isCall() &&
!node->getOpCode().isIndirect() &&
!node->getSymbolReference()->isUnresolved())
{
TR::ResolvedMethodSymbol *calleeSymbol = node->getSymbol()->castToResolvedMethodSymbol();
TR_ResolvedMethod *calleeMethod = calleeSymbol->getResolvedMethod();
if (calleeMethod->containingClass() == _classPointer &&
(!strncmp(calleeMethod->nameChars(), "<init>", 6) ||
(calleeMethod->isPrivate() &&
!isCalledByNonConstructorMethodsInClass(calleeMethod, resolvedMethodSyms))))
initializerMethodSymbol = calleeSymbol;
}
//if (!initializerMethodsInClass->find(initializerMethodSymbol))
if (!findMethod(initializerMethodsInClass, initializerMethodSymbol))
initializerMethodsInClass->add(initializerMethodSymbol);
///initializerMethodsInClass->addAfter(initializerMethodSymbol, initializerMethodsInClass->getListHead());
}
}
}
ListElement<TR::ResolvedMethodSymbol> *initMethodSymElem = initializerMethodsInClass->getListHead();
while (initMethodSymElem)
{
TR::ResolvedMethodSymbol *initMethodSym = initMethodSymElem->getData();
if (!resolvedMethodSyms->find(initMethodSym))
{
ListIterator<TR::ResolvedMethodSymbol> resolvedIt(resolvedMethodSyms);
TR::ResolvedMethodSymbol *resolvedMethodSym;
for (resolvedMethodSym = resolvedIt.getFirst(); resolvedMethodSym; resolvedMethodSym = resolvedIt.getNext())
{
if (resolvedMethodSym->getResolvedMethod()->isSameMethod(initMethodSym->getResolvedMethod()))
{
initMethodSymElem->setData(resolvedMethodSym);
break;
}
}
}
initMethodSymElem = initMethodSymElem->getNextElement();
}
comp()->setCurrentIlGenerator(prevIlGen);
}
bool
TR_ClassLookahead::examineNode(TR::TreeTop *nextTree, TR::Node *grandParent, TR::Node *parent, int32_t childNum, TR::Node *node, vcount_t visitCount)
{
if (node->getVisitCount() == visitCount)
{
if (node->getOpCode().isLoadVar())
invalidateIfEscapingLoad(nextTree, grandParent, parent, childNum, node);
return true;
}
if (node->getOpCode().isStore())
{
TR::SymbolReference *storedSymRef = node->getSymbolReference();
TR::Symbol *sym = storedSymRef->getSymbol();
//dumpOptDetails("Store node %p fieldInfo %p\n", node, fieldInfo);
if (isProperFieldAccess(node))
{
//dumpOptDetails("Proper store node %p fieldInfo %p\n", node, fieldInfo);
int32_t childAdjust = (node->getOpCode().isWrtBar()) ? 2 : 1;
TR::Node *rhsOfStoreNode = node->getChild(node->getNumChildren() - childAdjust);
bool isConstantLengthArrayAllocation = false;
bool isInitialized = false;
int32_t numberOfDimensions = -1;
int32_t firstDimensionChild = 0;
int32_t firstConstantLengthArrayDim = -1;
int32_t rhsNumChildren = rhsOfStoreNode->getNumChildren();
const char *sig = NULL;
int32_t length = 0;
bool isNewArray = true;
if ((rhsOfStoreNode->getOpCodeValue() == TR::newarray) ||
(rhsOfStoreNode->getOpCodeValue() == TR::anewarray) ||
(rhsOfStoreNode->getOpCodeValue() == TR::multianewarray))
{
if (rhsOfStoreNode->getOpCodeValue() == TR::multianewarray)
{
firstDimensionChild = 1;
numberOfDimensions = rhsOfStoreNode->getFirstChild()->getInt();
}
else
{
numberOfDimensions = 1;
if (rhsOfStoreNode->getOpCodeValue() == TR::anewarray)
{
// TODO: Do not consider types for arrays yet; have to
// be careful when appending '[' correct number of times
// for compatibility with constant propagation.
//
//
//sig = rhsOfStoreNode->getSecondChild()->getSymbolReference()->getTypeSignature(length);
}
}
int32_t j;
for (j=firstDimensionChild;j<rhsNumChildren - 1;j++)
{
TR::Node *rhsChild = rhsOfStoreNode->getChild(j);
if (rhsChild->getOpCodeValue() == TR::iconst)
{
isConstantLengthArrayAllocation = true;
firstConstantLengthArrayDim = j;
break;
}
}
}
else if (rhsOfStoreNode->getOpCodeValue() == TR::New)
{
isNewArray = false;
sig = rhsOfStoreNode->getFirstChild()->getSymbolReference()->getTypeSignature(length);
}
else
isNewArray = false;
// if this is a store to an arrayfield and a fieldInfo already
// exists (say created via a store seen in another ctor), then
// invalidate the fieldInfo
//
// check for stores of aconst null
//
bool canMorph = false;
if (rhsOfStoreNode->getOpCodeValue() == TR::aconst &&
rhsOfStoreNode->getInt() == 0)
canMorph = true;
TR_PersistentFieldInfo *fieldInfo = NULL;
if (isNewArray)
fieldInfo = getExistingArrayFieldInfo(sym, storedSymRef);
else
fieldInfo = getExistingFieldInfo(sym, storedSymRef, canMorph);
//
// TODO: remove restriction on number of dimensions
//
if (fieldInfo &&
!storedSymRef->isUnresolved() &&
(sym->isPrivate() ||
sym->isFinal()))
{
if (fieldInfo->isTypeInfoValid())
{
bool isClassPtrInitialized = false;
bool classPtrSame = true;
if (_inFirstBlock &&
_inInitializerMethod)
{
int32_t oldNumChars = fieldInfo->getNumChars();
if (oldNumChars > -1)
{
if (length != oldNumChars)
classPtrSame = false;
else
classPtrSame = (memcmp(sig, fieldInfo->getClassPointer(), length) == 0);
}
else
{
isClassPtrInitialized = true;
}
}
else
classPtrSame = false;
if (classPtrSame || isClassPtrInitialized)
{
if (isClassPtrInitialized)
{
//char *persistentSig = (char *)TR_Memory::jitPersistentAlloc(length);
//memcpy(persistentSig, sig, length);
//fieldInfo->setClassPointer(persistentSig);
fieldInfo->setClassPointer(sig);
}
fieldInfo->setNumChars(length);
if (_inClassInitializerMethod)
{
if (_traceIt)
traceMsg(comp(), "CStatically initializing type info for symbol %x at node %x\n", sym, node);
fieldInfo->setIsTypeInfoValid(VALID_AND_INITIALIZED_STATICALLY);
}
else
{
if (fieldInfo->isTypeInfoValid() == VALID_AND_INITIALIZED_STATICALLY)
{
if (!_inFirstInitializerMethod &&
!sym->isStatic())
{
if (_traceIt)
traceMsg(comp(), "C0Not always initializing type info for symbol %x at node %x\n", sym, node);
fieldInfo->setIsTypeInfoValid(VALID_BUT_NOT_ALWAYS_INITIALIZED);
}
else
{
if (!sym->isStatic())
{
if (_traceIt)
traceMsg(comp(), "C0Always initializing type info for symbol %x at node %x\n", sym, node);
fieldInfo->setIsTypeInfoValid(VALID_AND_ALWAYS_INITIALIZED);
}
}
}
else
{
if (!sym->isStatic())
{
if (_traceIt)
traceMsg(comp(), "C1Always initializing type info for symbol %x at node %x\n", sym, node);
fieldInfo->setIsTypeInfoValid(VALID_AND_ALWAYS_INITIALIZED);
}
else
{
if (_traceIt)
traceMsg(comp(), "C0Invalidating type info for symbol %x at node %x\n", sym, node);
fieldInfo->setIsTypeInfoValid(INVALID);
}
}
}
}
else
{
if (_traceIt)
traceMsg(comp(), "C0Invalidating type info for symbol %x at node %x\n", sym, node);
fieldInfo->setIsTypeInfoValid(INVALID);
}
}
TR_PersistentArrayFieldInfo *arrayFieldInfo = fieldInfo->asPersistentArrayFieldInfo();
if (isNewArray &&
arrayFieldInfo &&
isConstantLengthArrayAllocation &&
(numberOfDimensions <= 2))
{
if (_inFirstBlock &&
_inInitializerMethod)
{
int32_t oldNumDimensions = arrayFieldInfo->getNumDimensions();
if (oldNumDimensions > -1)
{
if (arrayFieldInfo->isDimensionInfoValid())
{
if (oldNumDimensions != numberOfDimensions)
{
// Same field is assigned different dimension arrays
// at different program points within this class.
//
if (_traceIt)
traceMsg(comp(), "0Invalidating dimension info for symbol %x at node %x\n", sym, node);
arrayFieldInfo->setIsDimensionInfoValid(INVALID);
}
}
}
else
{
isInitialized = true;
arrayFieldInfo->prepareArrayFieldInfo(numberOfDimensions, comp());
}
}
else
{
if (_traceIt)
traceMsg(comp(), "00Invalidating dimension info for symbol %x at node %x\n", sym, node);
arrayFieldInfo->setIsDimensionInfoValid(INVALID);
}
if (arrayFieldInfo->isDimensionInfoValid())
{
// Invalidate the dimensions that are known to be
// non constants at this stage
//
int32_t k;
for (k=0;k<firstConstantLengthArrayDim - firstDimensionChild;k++)
arrayFieldInfo->setDimensionInfo(k, -1);
for (;k<(rhsNumChildren - 1 - firstDimensionChild);k++)
{
TR::Node *rhsChild = rhsOfStoreNode->getChild(k+firstDimensionChild);
if (_inFirstBlock &&
_inInitializerMethod &&
(rhsChild->getOpCodeValue() == TR::iconst) &&
((rhsChild->getInt() == arrayFieldInfo->getDimensionInfo(k)) ||
isInitialized))
{
arrayFieldInfo->setDimensionInfo(k, rhsChild->getInt());
if (_inClassInitializerMethod)
{
if (_traceIt)
traceMsg(comp(), "Statically initializing dimension info for symbol %x at node %x\n", sym, node);
arrayFieldInfo->setIsDimensionInfoValid(VALID_AND_INITIALIZED_STATICALLY);
}
else
{
if (arrayFieldInfo->isDimensionInfoValid() == VALID_AND_INITIALIZED_STATICALLY)
{
if (!_inFirstInitializerMethod &&
!sym->isStatic())
{
if (_traceIt)
traceMsg(comp(), "0Not always initializing dimension info for symbol %x at node %x\n", sym, node);
arrayFieldInfo->setIsDimensionInfoValid(VALID_BUT_NOT_ALWAYS_INITIALIZED);
}
else
{
if (!sym->isStatic())
{
if (_traceIt)
traceMsg(comp(), "0Always initializing dimension info for symbol %x at node %x\n", sym, node);
arrayFieldInfo->setIsDimensionInfoValid(VALID_AND_ALWAYS_INITIALIZED);
}
}
}
else
{
if (!sym->isStatic())
{
if (_traceIt)
traceMsg(comp(), "1Always initializing dimension info for symbol %x at node %x\n", sym, node);
arrayFieldInfo->setIsDimensionInfoValid(VALID_AND_ALWAYS_INITIALIZED);
}
else
{
if (_traceIt)
traceMsg(comp(), "C0Invalidating dimension info for symbol %x at node %x\n", sym, node);
arrayFieldInfo->setIsDimensionInfoValid(INVALID);
}
}
}
}
else
{
if (_traceIt)
traceMsg(comp(), "C1Invalidating dimension info for symbol %x at node %x\n", sym, node);
arrayFieldInfo->setIsDimensionInfoValid(INVALID);
arrayFieldInfo->setDimensionInfo(k, -1);
}
}
}
}
else if (arrayFieldInfo)
{
// Not a constant length allocation event
//
if (_traceIt)
traceMsg(comp(), "1Invalidating dimension info for symbol %x at node %x\n", sym, node);
arrayFieldInfo->setIsDimensionInfoValid(INVALID);
}
}
else if (fieldInfo)
{
// It is a store to this array field but not an allocation event
//
if (_traceIt)
traceMsg(comp(), "1Invalidating dimension and type info for symbol %x at node %x(%s)\n", sym, node, node->getOpCode().getName());
fieldInfo->setIsTypeInfoValid(INVALID);
TR_PersistentArrayFieldInfo *arrayFieldInfo = fieldInfo->asPersistentArrayFieldInfo();
if (arrayFieldInfo)
arrayFieldInfo->setIsDimensionInfoValid(INVALID);
else
fieldInfo->setCanChangeToArray(false);
}
}
else if ((sym->isShadow() ||
sym->isStatic()) &&
!storedSymRef->isUnresolved() &&
(sym->isPrivate() ||
sym->isFinal()))
{
TR_PersistentFieldInfo *fieldInfo = getExistingFieldInfo(sym, storedSymRef, false);
if (fieldInfo)
{
if (_traceIt)
traceMsg(comp(), "2Invalidating dimension and type info for symbol %x at node %x\n", sym, node);
fieldInfo->setIsTypeInfoValid(INVALID);
TR_PersistentArrayFieldInfo *arrayFieldInfo = fieldInfo->asPersistentArrayFieldInfo();
if (arrayFieldInfo)
arrayFieldInfo->setIsDimensionInfoValid(INVALID);
}
}
if (sym->isStatic() && sym->isFinal() && !_inClassInitializerMethod)
_classInfo->setCannotTrustStaticFinal();
if (isPrivateFieldAccess(node) || isProperFieldAccess(node))
{
//int32_t length = 0;
//char *sig = TR_ClassLookahead::getFieldSignature(comp(), sym, storedSymRef, length);
TR_PersistentFieldInfo *previousFieldInfo = _classFieldInfo->find(comp(), sym, storedSymRef);
TR_PersistentFieldInfo *fieldInfo = previousFieldInfo;
if (!fieldInfo)
{
fieldInfo = getExistingFieldInfo(sym, storedSymRef);
if (fieldInfo)
{
fieldInfo->setIsTypeInfoValid(INVALID);
TR_PersistentArrayFieldInfo *arrayFieldInfo = fieldInfo->asPersistentArrayFieldInfo();
if (arrayFieldInfo)
arrayFieldInfo->setIsDimensionInfoValid(INVALID);
else
fieldInfo->setCanChangeToArray(false);
}
}
//if (isProperFieldAccess(node))
{
if (fieldInfo)
{
if (!_inInitializerMethod && !_inClassInitializerMethod)
{
fieldInfo->setImmutable(false);
}
int32_t childAdjust = (node->getOpCode().isWrtBar()) ? 2 : 1;
TR::Node *rhsOfStoreNode = node->getChild(node->getNumChildren() - childAdjust);
int32_t length;
char *sig = getFieldSignature(comp(), sym, storedSymRef, length);
if (rhsOfStoreNode->getOpCode().isCall() &&
rhsOfStoreNode->getSymbol()->getResolvedMethodSymbol())
{
if (rhsOfStoreNode->getSymbol()->getResolvedMethodSymbol()->getRecognizedMethod() == TR::java_math_BigDecimal_valueOf)
{
//fprintf(stderr, "0Resetting big integer property for %s in %s\n", sig, _currentMethodSymbol->getResolvedMethod()->nameChars()); fflush(stderr);
fieldInfo->setBigIntegerType(false);
}
else if ((rhsOfStoreNode->getSymbol()->getResolvedMethodSymbol()->getRecognizedMethod() == TR::java_math_BigDecimal_add) ||
(rhsOfStoreNode->getSymbol()->getResolvedMethodSymbol()->getRecognizedMethod() == TR::java_math_BigDecimal_subtract) ||
(rhsOfStoreNode->getSymbol()->getResolvedMethodSymbol()->getRecognizedMethod() == TR::java_math_BigDecimal_multiply))
{
//fprintf(stderr, "1Resetting big integer property for %s in %s\n", sig, _currentMethodSymbol->getResolvedMethod()->nameChars()); fflush(stderr);
fieldInfo->setBigIntegerType(false);
}
else if ((rhsOfStoreNode->getSymbol()->getResolvedMethodSymbol()->getRecognizedMethod() == TR::java_math_BigInteger_add) ||
(rhsOfStoreNode->getSymbol()->getResolvedMethodSymbol()->getRecognizedMethod() == TR::java_math_BigInteger_subtract) ||
(rhsOfStoreNode->getSymbol()->getResolvedMethodSymbol()->getRecognizedMethod() == TR::java_math_BigInteger_multiply))
{
fieldInfo->setBigDecimalType(false);
}
}
else
{
if (rhsOfStoreNode->getOpCode().isLoadVar() &&
rhsOfStoreNode->getSymbolReference()->getSymbol()->isStatic())
{
TR::Symbol::RecognizedField field = rhsOfStoreNode->getSymbolReference()->getSymbol()->getRecognizedField();
if (field != TR::Symbol::Java_math_BigInteger_ZERO)
{
//fprintf(stderr, "2Resetting big integer property for %s in %s\n", sig, _currentMethodSymbol->getResolvedMethod()->nameChars()); fflush(stderr);
fieldInfo->setBigIntegerType(false);
}
else
{
//fprintf(stderr, "Found load of big integer ZERO in for %s (big integer type %d) in %s compiling %s\n", sig, fieldInfo->isBigIntegerType(), _currentMethodSymbol->getResolvedMethod()->nameChars(), comp()->signature()); fflush(stderr);
}
}
else
{
//fprintf(stderr, "3Resetting big integer property for %s in %s\n", sig, _currentMethodSymbol->getResolvedMethod()->nameChars()); fflush(stderr);
fieldInfo->setBigIntegerType(false);
}
fieldInfo->setBigDecimalType(false);
}
}
}
}
}
else if (node->getOpCode().isLoadVar())
invalidateIfEscapingLoad(nextTree, grandParent, parent, childNum, node);
else if (node->getOpCodeValue() == TR::BBEnd)
_inFirstBlock = false;
if (node->getOpCode().isCall())
{
TR::Method *calleeMethod = node->getSymbol()->castToMethodSymbol()->getMethod();
if (calleeMethod != NULL && !strncmp(calleeMethod->classNameChars(), "java/lang/reflect", 17))
return false;
}
node->setVisitCount(visitCount);
int32_t i;
int32_t numChildren = node->getNumChildren();
for (i=0;i<numChildren;i++)
{
if (!examineNode(nextTree, parent, node, i, node->getChild(i), visitCount))
return false;
}
return true;
}
static bool isArithmeticForSameField(TR::Node *treeNode, TR::Node *grandParent, TR::Node *parent, TR::Node *node)
{
if ((node->getOpCodeValue() != TR::iloadi) &&
(node->getOpCodeValue() != TR::lloadi) &&
(node->getOpCodeValue() != TR::iload) &&
(node->getOpCodeValue() != TR::lload))
return false;
if (parent->getReferenceCount() != 1)
return false;
if (!grandParent)
return false;
TR::Node *storeNode = NULL;
if (!grandParent->getOpCode().isStore())
{
if (grandParent->getOpCode().isConversion())
{
if (treeNode->getOpCodeValue() == TR::treetop ||
treeNode->getOpCode().isNullCheck())
treeNode = treeNode->getFirstChild();
if (treeNode->getOpCode().isStore())
{
TR::Node *valueChild = NULL;
if (treeNode->getOpCode().isIndirect())
valueChild = treeNode->getSecondChild();
else
valueChild = treeNode->getFirstChild();
if (valueChild->getOpCode().isConversion() &&
(valueChild->getReferenceCount() == 1) &&
valueChild->getFirstChild()->getOpCode().isConversion() &&
(valueChild->getFirstChild()->getReferenceCount() == 1) &&
(grandParent == valueChild->getFirstChild()) &&
(treeNode->getDataType() == parent->getDataType()))
{
// Tree matches for update of byte/char/short datatype
storeNode = treeNode;
}
else
return false;
}
else
return false;
}
else
return false;
}
else
{
if (grandParent->getOpCode().isIndirect() &&
(grandParent->getSecondChild() != parent))
return false;
storeNode = grandParent;
}
if ((parent->getOpCodeValue() == TR::iadd) ||
(parent->getOpCodeValue() == TR::isub) ||
(parent->getOpCodeValue() == TR::imul))
{
if (node->getOpCodeValue() == TR::iloadi)
{
if (storeNode->getOpCodeValue() == TR::istorei)
{
if (storeNode->getSymbolReference() == node->getSymbolReference())
{
if (storeNode->getFirstChild()->getOpCodeValue() == node->getFirstChild()->getOpCodeValue())
{
if ((storeNode->getFirstChild() == node->getFirstChild()) ||
(storeNode->getFirstChild()->getSymbolReference() == node->getFirstChild()->getSymbolReference()))
return true;
}
}
}
}
else if ((node->getOpCodeValue() == TR::iload) &&
(storeNode->getOpCodeValue() == TR::istore) &&
(storeNode->getSymbolReference() == node->getSymbolReference()))
return true;
}
else if ((parent->getOpCodeValue() == TR::ladd) ||
(parent->getOpCodeValue() == TR::lsub) ||
(parent->getOpCodeValue() == TR::lmul))
{
if (node->getOpCodeValue() == TR::lloadi)
{
if (storeNode->getOpCodeValue() == TR::lstorei)
{
if (storeNode->getSymbolReference() == node->getSymbolReference())
{
if (storeNode->getFirstChild()->getOpCodeValue() == node->getFirstChild()->getOpCodeValue())
{
if ((storeNode->getFirstChild() == node->getFirstChild()) ||
(storeNode->getFirstChild()->getSymbolReference() == node->getFirstChild()->getSymbolReference()))
return true;
}
}
}
}
else if ((node->getOpCodeValue() == TR::lload) &&
(storeNode->getOpCodeValue() == TR::lstore) &&
(storeNode->getSymbolReference() == node->getSymbolReference()))
return true;
}
return false;
}
static bool isPureBigDecimalMethod(TR::Node *node, TR::Compilation *comp, TR_PersistentFieldInfo *fieldInfo, bool & isBigDecimal, bool & isBigInteger)
{
if (!node)
return false;
//fprintf(stderr, "0Calling isPure %s\n", node->getOpCode().getName()); fflush(stderr);
//if (node->getOpCodeValue() == TR::aloadi)
// {
// fprintf(stderr, "node sym ref %p offset %d vft %p\n", node->getSymbolReference(), node->getSymbolReference()->getOffset(), comp->getSymRefTab()->findVftSymbolRef());
// }
if (node->getOpCodeValue() != TR::acalli)
{
//fprintf(stderr, "1Returning false from isPure %s\n", node->getOpCode().getName()); fflush(stderr);
return false;
}
if (node->getSymbolReference()->isUnresolved())