// resolved casts that are not to abstract, interface, or array need a super test
bool OMR::TreeEvaluator::instanceOfOrCheckCastNeedSuperTest(TR::Node * node, TR::CodeGenerator *cg)
{
TR::Node *castClassNode = node->getSecondChild();
TR::MethodSymbol *helperSym = node->getSymbol()->castToMethodSymbol();
TR::SymbolReference *castClassSymRef = castClassNode->getSymbolReference();
if (!TR::TreeEvaluator::isStaticClassSymRef(castClassSymRef))
{
// We could theoretically do a super test on something with no sym, but it would require significant
// changes to platform code. The benefit is little at this point (shows up from reference arraycopy reductions)
if (cg->supportsInliningOfIsInstance() &&
node->getOpCodeValue() == TR::instanceof &&
node->getSecondChild()->getOpCodeValue() != TR::loadaddr)
return true;
else
return false;
}
TR::StaticSymbol *castClassSym = castClassSymRef->getSymbol()->getStaticSymbol();
if (castClassSymRef->isUnresolved())
{
return false;
}
else
{
TR_OpaqueClassBlock * clazz;
// If the class is a regular class (i.e., not an interface nor an array) and
// not known to be a final class, an inline superclass test can be generated.
// If the helper does not preserve all the registers there will not be
// enough registers to do the superclass test inline.
// Also, don't generate the superclass test if optimizing for space.
//
if (castClassSym &&
(clazz = (TR_OpaqueClassBlock *) castClassSym->getStaticAddress()) &&
!TR::Compiler->cls.isClassArray(cg->comp(), clazz) &&
!TR::Compiler->cls.isInterfaceClass(cg->comp(), clazz) &&
!TR::Compiler->cls.isClassFinal(cg->comp(), clazz) &&
helperSym->preservesAllRegisters() &&
!cg->comp()->getOption(TR_OptimizeForSpace))
return true;
}
return false;
}
// unresolved casts or casts to things other than abstract or interface benefit from
// an equality test
bool OMR::TreeEvaluator::instanceOfOrCheckCastNeedEqualityTest(TR::Node * node, TR::CodeGenerator *cg)
{
TR::Node *castClassNode = node->getSecondChild();
TR::SymbolReference *castClassSymRef = castClassNode->getSymbolReference();
if (!TR::TreeEvaluator::isStaticClassSymRef(castClassSymRef))
{
return true;
}
TR::StaticSymbol *castClassSym = castClassSymRef->getSymbol()->getStaticSymbol();
if (castClassSymRef->isUnresolved())
{
return false;
}
else
{
TR_OpaqueClassBlock * clazz;
if (castClassSym
&& (clazz = (TR_OpaqueClassBlock *) castClassSym->getStaticAddress())
&& !TR::Compiler->cls.isInterfaceClass(cg->comp(), clazz)
&& (
!TR::Compiler->cls.isAbstractClass(cg->comp(), clazz)
// here be dragons
// int.class, char.class, etc are final & abstract
// usually instanceOf calls on these classes are ripped out by the optimizer
// but in some cases they can persist to codegen which without the following
// case causes assertions because we opt out of calling the helper and doing
// all inline tests. Really we could just jmp to the failed side, but to reduce
// service risk we are going to do an equality test that we know will fail
// NOTE final abstract is not enough - all array classes are final abstract
// to prevent them being used with new and being extended...
|| (TR::Compiler->cls.isAbstractClass(cg->comp(), clazz) && TR::Compiler->cls.isClassFinal(cg->comp(), clazz)
&& TR::Compiler->cls.isPrimitiveClass(cg->comp(), clazz)))
)
return true;
}
return false;
}
void
TR_Debug::print(TR::FILE *pOutFile, TR::S390CallSnippet * snippet)
{
uint8_t * bufferPos = snippet->getSnippetLabel()->getCodeLocation();
TR::Node * callNode = snippet->getNode();
TR::SymbolReference * methodSymRef = snippet->getRealMethodSymbolReference();
if(!methodSymRef)
methodSymRef = callNode->getSymbolReference();
TR::MethodSymbol * methodSymbol = methodSymRef->getSymbol()->castToMethodSymbol();
TR::SymbolReference * glueRef;
int8_t padbytes = snippet->getPadBytes();
printSnippetLabel(pOutFile, snippet->getSnippetLabel(), bufferPos,
methodSymRef->isUnresolved() ? "Unresolved Call Snippet" : "Call Snippet");
bufferPos = printS390ArgumentsFlush(pOutFile, callNode, bufferPos, snippet->getSizeOfArguments());
if (methodSymRef->isUnresolved() || _comp->compileRelocatableCode())
{
if (methodSymbol->isSpecial())
{
glueRef = _cg->getSymRef(TR_S390interpreterUnresolvedSpecialGlue);
}
else if (methodSymbol->isStatic())
{
glueRef = _cg->getSymRef(TR_S390interpreterUnresolvedStaticGlue);
}
else
{
glueRef = _cg->getSymRef(TR_S390interpreterUnresolvedDirectVirtualGlue);
}
}
else
{
bool synchronised = methodSymbol->isSynchronised();
if ((methodSymbol->isVMInternalNative() || methodSymbol->isJITInternalNative()))
{
glueRef = _cg->getSymRef(TR_S390nativeStaticHelper);
}
else
{
switch (callNode->getDataType())
{
case TR::NoType:
if (synchronised)
{
glueRef = _cg->getSymRef(TR_S390interpreterSyncVoidStaticGlue);
}
else
{
glueRef = _cg->getSymRef(TR_S390interpreterVoidStaticGlue);
}
break;
case TR::Int8:
case TR::Int16:
case TR::Int32:
if (synchronised)
{
glueRef = _cg->getSymRef(TR_S390interpreterSyncIntStaticGlue);
}
else
{
glueRef = _cg->getSymRef(TR_S390interpreterIntStaticGlue);
}
break;
case TR::Address:
if (TR::Compiler->target.is64Bit())
{
if (synchronised)
{
glueRef = _cg->getSymRef(TR_S390interpreterSyncLongStaticGlue);
}
else
{
glueRef = _cg->getSymRef(TR_S390interpreterLongStaticGlue);
}
}
else
{
if (synchronised)
{
glueRef = _cg->getSymRef(TR_S390interpreterSyncIntStaticGlue);
}
else
{
glueRef = _cg->getSymRef(TR_S390interpreterIntStaticGlue);
}
}
break;
case TR::Int64:
if (synchronised)
{
glueRef = _cg->getSymRef(TR_S390interpreterSyncLongStaticGlue);
}
else
{
glueRef = _cg->getSymRef(TR_S390interpreterLongStaticGlue);
}
break;
case TR::Float:
if (synchronised)
{
glueRef = _cg->getSymRef(TR_S390interpreterSyncFloatStaticGlue);
}
else
{
glueRef = _cg->getSymRef(TR_S390interpreterFloatStaticGlue);
}
break;
case TR::Double:
if (synchronised)
{
glueRef = _cg->getSymRef(TR_S390interpreterSyncDoubleStaticGlue);
}
else
{
glueRef = _cg->getSymRef(TR_S390interpreterDoubleStaticGlue);
}
break;
default:
TR_ASSERT(0, "Bad return data type for a call node. DataType was %s\n",
getName(callNode->getDataType()));
}
}
}
bufferPos = printRuntimeInstrumentationOnOffInstruction(pOutFile, bufferPos, false); // RIOFF
if (snippet->getKind() == TR::Snippet::IsUnresolvedCall)
{
int lengthOfLoad = (TR::Compiler->target.is64Bit())?6:4;
printPrefix(pOutFile, NULL, bufferPos, 6);
trfprintf(pOutFile, "LARL \tGPR14, *+%d <%p>\t# Start of Data Const.",
8 + lengthOfLoad + padbytes,
bufferPos + 8 + lengthOfLoad + padbytes);
bufferPos += 6;
if (TR::Compiler->target.is64Bit())
{
printPrefix(pOutFile, NULL, bufferPos, 6);
trfprintf(pOutFile, "LG \tGPR_EP, 0(,GPR14)");
bufferPos += 6;
}
else
{
printPrefix(pOutFile, NULL, bufferPos, 4);
trfprintf(pOutFile, "L \tGPR_EP, 0(,GPR14)");
bufferPos += 4;
}
printPrefix(pOutFile, NULL, bufferPos, 2);
trfprintf(pOutFile, "BCR \tGPR_EP");
bufferPos += 2;
}
else
{
printPrefix(pOutFile, NULL, bufferPos, 6);
trfprintf(pOutFile, "BRASL \tGPR14, <%p>\t# Branch to Helper Method %s",
snippet->getSnippetDestAddr(),
snippet->usedTrampoline()?"- Trampoline Used.":"");
bufferPos += 6;
}
if (padbytes == 2)
{
printPrefix(pOutFile, NULL, bufferPos, 2);
trfprintf(pOutFile, "DC \t0x0000 \t\t\t# 2-bytes padding for alignment");
bufferPos += 2;
}
else if (padbytes == 4)
{
printPrefix(pOutFile, NULL, bufferPos, 4) ;
trfprintf(pOutFile, "DC \t0x00000000 \t\t# 4-bytes padding for alignment");
bufferPos += 4;
}
else if (padbytes == 6)
{
printPrefix(pOutFile, NULL, bufferPos, 6) ;
trfprintf(pOutFile, "DC \t0x000000000000 \t\t# 6-bytes padding for alignment");
bufferPos += 6;
}
printPrefix(pOutFile, NULL, bufferPos, sizeof(intptrj_t));
trfprintf(pOutFile, "DC \t%p \t\t# Method Address", glueRef->getMethodAddress());
bufferPos += sizeof(intptrj_t);
printPrefix(pOutFile, NULL, bufferPos, sizeof(intptrj_t));
trfprintf(pOutFile, "DC \t%p \t\t# Call Site RA", snippet->getCallRA());
bufferPos += sizeof(intptrj_t);
if (methodSymRef->isUnresolved())
{
printPrefix(pOutFile, NULL, bufferPos, 0);
}
else
{
printPrefix(pOutFile, NULL, bufferPos, sizeof(intptrj_t));
}
trfprintf(pOutFile, "DC \t%p \t\t# Method Pointer", methodSymRef->isUnresolved() ? 0 : methodSymbol->getMethodAddress());
}
TR::Register *IA32LinkageUtils::pushIntegerWordArg(
TR::Node *child,
TR::CodeGenerator *cg)
{
TR::Register *pushRegister;
if (child->getRegister() == NULL)
{
if (child->getOpCode().isLoadConst())
{
int32_t value = child->getInt();
TR_X86OpCodes pushOp;
if (value >= -128 && value <= 127)
{
pushOp = PUSHImms;
}
else
{
pushOp = PUSHImm4;
}
generateImmInstruction(pushOp, child, value, cg);
cg->decReferenceCount(child);
return NULL;
}
else if (child->getOpCodeValue() == TR::loadaddr)
{
TR::SymbolReference * symRef = child->getSymbolReference();
TR::StaticSymbol *sym = symRef->getSymbol()->getStaticSymbol();
if (sym)
{
TR_ASSERT(!symRef->isUnresolved(), "pushIntegerWordArg loadaddr expecting resolved symbol");
generateImmSymInstruction(PUSHImm4, child, (uintptrj_t)sym->getStaticAddress(), symRef, cg);
cg->decReferenceCount(child);
return NULL;
}
}
else if (child->getOpCodeValue() == TR::fbits2i &&
!child->normalizeNanValues() &&
child->getReferenceCount() == 1)
{
pushRegister = pushFloatArg(child->getFirstChild(), cg);
cg->decReferenceCount(child);
return pushRegister;
}
else if (child->getOpCode().isMemoryReference() &&
(child->getReferenceCount() == 1) &&
(child->getSymbolReference() != cg->comp()->getSymRefTab()->findVftSymbolRef()))
{
TR::MemoryReference *tempMR = generateX86MemoryReference(child, cg);
generateMemInstruction(PUSHMem, child, tempMR, cg);
tempMR->decNodeReferenceCounts(cg);
cg->decReferenceCount(child);
return NULL;
}
}
pushRegister = cg->evaluate(child);
generateRegInstruction(PUSHReg, child, pushRegister, cg);
cg->decReferenceCount(child);
return pushRegister;
}