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Walker.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 <algorithm>
#include "codegen/CodeGenerator.hpp"
#include "compile/InlineBlock.hpp"
#include "compile/Method.hpp"
#include "compile/ResolvedMethod.hpp"
#include "control/Recompilation.hpp"
#include "control/RecompilationInfo.hpp"
#include "env/CompilerEnv.hpp"
#include "env/PersistentCHTable.hpp"
#include "env/StackMemoryRegion.hpp"
#include "env/TypeLayout.hpp"
#include "env/jittypes.h"
#include "env/VMAccessCriticalSection.hpp"
#include "env/VerboseLog.hpp"
#include "exceptions/AOTFailure.hpp"
#include "exceptions/FSDFailure.hpp"
#include "exceptions/RuntimeFailure.hpp"
#include "optimizer/TransformUtil.hpp"
#include "il/AutomaticSymbol.hpp"
#include "il/Node.hpp"
#include "il/Node_inlines.hpp"
#include "il/TreeTop.hpp"
#include "il/TreeTop_inlines.hpp"
#include "env/j9fieldsInfo.h"
#include "env/VMJ9.h"
#include "ilgen/ClassLookahead.hpp"
#include "ilgen/J9ByteCode.hpp"
#include "ilgen/J9ByteCodeIlGenerator.hpp"
#include "infra/Bit.hpp" //for trailingZeroes
#include "env/JSR292Methods.h"
#if defined(J9VM_OPT_JITSERVER)
#include "env/j9methodServer.hpp"
#endif
#define JAVA_SERIAL_CLASS_NAME "Ljava/io/ObjectInputStream;"
#define JAVA_SERIAL_CLASS_NAME_LEN 27
#define JAVA_SERIAL_CALLEE_METHOD_NAME_LEN 10
#define JAVA_SERIAL_CALLEE_METHOD_NAME "readObject"
#define JAVA_SERIAL_CALLEE_METHOD_SIG_LEN 20
#define JAVA_SERIAL_CALLEE_METHOD_SIG "()Ljava/lang/Object;"
#define JAVA_SERIAL_REPLACE_CLASS_LEN 25
#define JAVA_SERIAL_REPLACE_CLASS_NAME "java/io/ObjectInputStream"
#define JAVA_SERIAL_REPLACE_METHOD_SIG_LEN 64
#define JAVA_SERIAL_REPLACE_METHOD_SIG "(Ljava/io/ObjectInputStream;Ljava/lang/Class;)Ljava/lang/Object;"
#define JAVA_SERIAL_REPLACE_METHOD_NAME_LEN 20
#define JAVA_SERIAL_REPLACE_METHOD_NAME "redirectedReadObject"
#define ORB_CALLER_METHOD_NAME_LEN 10
#define ORB_CALLER_METHOD_NAME "readObject"
#define ORB_CALLER_METHOD_SIG_LEN 30
#define ORB_CALLER_METHOD_SIG "(Ljava/io/ObjectInputStream;)V"
#define ORB_CALLEE_METHOD_NAME_LEN 10
#define ORB_CALLEE_METHOD_NAME "readObject"
#define ORB_CALLEE_METHOD_SIG_LEN 20
#define ORB_CALLEE_METHOD_SIG "()Ljava/lang/Object;"
#define ORB_REPLACE_CLASS_LEN 30
#define ORB_REPLACE_CLASS_NAME "com/ibm/rmi/io/IIOPInputStream"
#define ORB_REPLACE_METHOD_SIG_LEN 64
#define ORB_REPLACE_METHOD_SIG "(Ljava/io/ObjectInputStream;Ljava/lang/Class;)Ljava/lang/Object;"
#define ORB_REPLACE_METHOD_NAME_LEN 20
#define ORB_REPLACE_METHOD_NAME "redirectedReadObject"
#define JSR292_ILGenMacros "java/lang/invoke/ILGenMacros"
#define JSR292_placeholder "placeholder"
#define JSR292_placeholderSig "(I)I"
#define JSR292_MethodHandle "java/lang/invoke/MethodHandle"
#define JSR292_invokeExactTargetAddress "invokeExactTargetAddress"
#define JSR292_invokeExactTargetAddressSig "()J"
#define JSR292_getType "type"
#define JSR292_getTypeSig "()Ljava/lang/invoke/MethodType;"
#define JSR292_invokeExact "invokeExact"
#define JSR292_invokeExactSig "([Ljava/lang/Object;)Ljava/lang/Object;"
#define JSR292_ComputedCalls "java/lang/invoke/ComputedCalls"
#define JSR292_dispatchDirectPrefix "dispatchDirect_"
#define JSR292_dispatchDirectArgSig "(JI)"
#define JSR292_asType "asType"
#define JSR292_asTypeSig "(Ljava/lang/invoke/MethodHandle;Ljava/lang/invoke/MethodType;)Ljava/lang/invoke/MethodHandle;"
#define JSR292_forGenericInvoke "forGenericInvoke"
#define JSR292_forGenericInvokeSig "(Ljava/lang/invoke/MethodType;Z)Ljava/lang/invoke/MethodHandle;"
static TR::SymbolReference * createLoadFieldSymRef(TR::Compilation * comp, TR_OpaqueClassBlock * fieldClass, const char * fieldname, bool nullIfNotFound = false);
static void printStack(TR::Compilation *comp, TR_Stack<TR::Node*> *stack, const char *message)
{
// TODO: This should be in the debug DLL
if (stack->isEmpty())
{
traceMsg(comp, " ---- %s: empty -----------------\n", message);
}
else
{
TR_BitVector nodesAlreadyPrinted(comp->getNodeCount(), comp->trMemory(), stackAlloc, growable);
comp->getDebug()->saveNodeChecklist(nodesAlreadyPrinted);
char buf[30];
traceMsg(comp, " /--- %s ------------------------", message);
for (int i = stack->topIndex(); i >= 0; --i)
{
TR::Node *node = stack->element(i);
traceMsg(comp, "\n");
snprintf(buf, sizeof(buf), " @%-2d", i);
comp->getDebug()->printWithFixedPrefix(comp->getOutFile(), node, 1, false, true, buf);
if (!nodesAlreadyPrinted.isSet(node->getGlobalIndex()))
{
for (int j = 0; j < node->getNumChildren(); ++j)
{
traceMsg(comp, "\n");
comp->getDebug()->printWithFixedPrefix(comp->getOutFile(), node->getChild(j), 3, true, true, " ");
}
}
}
traceMsg(comp, "\n");
}
}
static void printTrees(TR::Compilation *comp, TR::TreeTop *firstTree, TR::TreeTop *stopTree, const char *message)
{
// TODO: This should be in the debug DLL
if (firstTree == stopTree)
{
traceMsg(comp, " ---- %s: none ------------------\n", message);
}
else
{
traceMsg(comp, " /--- %s ------------------------", message);
for (TR::TreeTop *tt = firstTree; tt && tt != stopTree; tt = tt->getNextTreeTop())
{
traceMsg(comp, "\n");
comp->getDebug()->printWithFixedPrefix(comp->getOutFile(), tt->getNode(), 1, true, true, " ");
}
traceMsg(comp, "\n");
}
}
static TR::ILOpCodes getCallOpForType(TR::DataType type)
{
switch(type)
{
case TR::Address: return TR::acall;
case TR::Float : return TR::fcall;
case TR::Double: return TR::dcall;
case TR::Int32:
case TR::Int16:
case TR::Int8: return TR::icall;
case TR::Int64:return TR::lcall;
default: TR_ASSERT(false, "assertion failure");
}
return TR::BadILOp;
}
#define DCAS_AVAILABLE_FLAG "dWordCASSupported"
#define DCAS_AVAILABLE_FLAG_LEN 17
#define DCAS_AVAILABLE_FLAG_SIG "Z"
#define DCAS_AVAILABLE_FLAG_SIG_LEN 1
#define DSET_AVAILABLE_FLAG "dWordSetSupported"
#define DSET_AVAILABLE_FLAG_LEN 17
#define DSET_AVAILABLE_FLAG_SIG "Z"
#define DSET_AVAILABLE_FLAG_SIG_LEN 1
TR::Block * TR_J9ByteCodeIlGenerator::walker(TR::Block * prevBlock)
{
int32_t i, lastIndex = _bcIndex, firstIndex = _bcIndex;
if (comp()->getOption(TR_TraceILGen))
{
comp()->getDebug()->clearNodeChecklist();
traceMsg(comp(), "==== Starting ILGen walker at bytecode %x", _bcIndex);
if (_argPlaceholderSlot != -1)
traceMsg(comp(), " argPlaceholderSlot=%d", _argPlaceholderSlot);
traceMsg(comp(), "\n");
}
#if defined(J9VM_OPT_JITSERVER)
if (prevBlock == 0 && comp()->isOutOfProcessCompilation() && _methodSymbol->getResolvedMethod())
{
// Every J9BCinvoke* bytecode requires a corresponding resolved method for its method symbol.
// Prefetch resolved methods in one message.
// For unresolved methods, allow the next 2 requests to return NULL without asking the client,
// since they happen almost immediately after this one and method is unlikely to become resolved.
//
// NOTE: first request occurs in the switch statement over bytecodes,
// second request occurs in stashArgumentsForOSR
if (_methodSymbol->getResolvedMethod() == comp()->getMethodBeingCompiled())
static_cast<TR_ResolvedJ9JITServerMethod *>(_methodSymbol->getResolvedMethod())->cacheResolvedMethodsCallees(2);
// Cache field info for every field/static loaded/stored in this method, which are later used by
// jitFieldsAreSame/jitStaticAreSame when creating symbol references.
static_cast<TR_ResolvedJ9JITServerMethod *>(_methodSymbol->getResolvedMethod())->cacheFields();
}
#endif
while (_bcIndex < _maxByteCodeIndex)
{
if (blocks(_bcIndex) && blocks(_bcIndex) != _block)
{
if (isGenerated(_bcIndex))
_bcIndex = genGoto(_bcIndex);
else
_bcIndex = genBBEndAndBBStart();
if (_bcIndex >= _maxByteCodeIndex)
break;
}
if (_bcIndex < firstIndex)
firstIndex = _bcIndex;
else if (_bcIndex > lastIndex)
lastIndex = _bcIndex;
TR_ASSERT(!isGenerated(_bcIndex), "Walker error");
setIsGenerated(_bcIndex);
uint8_t opcode = _code[_bcIndex];
TR::TreeTop *traceStop = _block->getExit();
TR::TreeTop *traceStart = traceStop->getPrevTreeTop();
if (comp()->getOption(TR_TraceILGen))
traceMsg(comp(), "%4x: %s\n", _bcIndex, ((TR_J9VM *)fej9())->getByteCodeName(opcode));
_bc = convertOpCodeToByteCodeEnum(opcode);
stashArgumentsForOSR(_bc);
switch (_bc)
{
case J9BCinvokeinterface2:
case J9BCnop: _bcIndex += 1; break;
case J9BCaconstnull: loadConstant(TR::aconst, (void *)0); _bcIndex += 1; break;
case J9BCiconstm1: loadConstant(TR::iconst, -1); _bcIndex += 1; break;
case J9BCiconst0: loadConstant(TR::iconst, 0); _bcIndex += 1; break;
case J9BCiconst1: loadConstant(TR::iconst, 1); _bcIndex += 1; break;
case J9BCiconst2: loadConstant(TR::iconst, 2); _bcIndex += 1; break;
case J9BCiconst3: loadConstant(TR::iconst, 3); _bcIndex += 1; break;
case J9BCiconst4: loadConstant(TR::iconst, 4); _bcIndex += 1; break;
case J9BCiconst5: loadConstant(TR::iconst, 5); _bcIndex += 1; break;
case J9BClconst0: loadConstant(TR::lconst, (int64_t)0); _bcIndex += 1; break;
case J9BClconst1: loadConstant(TR::lconst, (int64_t)1); _bcIndex += 1; break;
case J9BCfconst0: loadConstant(TR::fconst, 0.0f); _bcIndex += 1; break;
case J9BCfconst1: loadConstant(TR::fconst, 1.0f); _bcIndex += 1; break;
case J9BCfconst2: loadConstant(TR::fconst, 2.0f); _bcIndex += 1; break;
case J9BCdconst0: loadConstant(TR::dconst, 0.0); _bcIndex += 1; break;
case J9BCdconst1: loadConstant(TR::dconst, 1.0); _bcIndex += 1; break;
case J9BCldc: loadFromCP(TR::NoType, nextByte()); _bcIndex += 2; break;
case J9BCldcw: loadFromCP(TR::NoType, next2Bytes()); _bcIndex += 3; break;
case J9BCldc2lw: loadFromCP(TR::NoType, next2Bytes()); _bcIndex += 3; break;
case J9BCldc2dw: loadFromCP(TR::NoType, next2Bytes()); _bcIndex += 3; break;
case J9BCiload0: loadAuto(TR::Int32, 0); _bcIndex += 1; break;
case J9BCiload1: loadAuto(TR::Int32, 1); _bcIndex += 1; break;
case J9BCiload2: loadAuto(TR::Int32, 2); _bcIndex += 1; break;
case J9BCiload3: loadAuto(TR::Int32, 3); _bcIndex += 1; break;
case J9BClload0: loadAuto(TR::Int64, 0); _bcIndex += 1; break;
case J9BClload1: loadAuto(TR::Int64, 1); _bcIndex += 1; break;
case J9BClload2: loadAuto(TR::Int64, 2); _bcIndex += 1; break;
case J9BClload3: loadAuto(TR::Int64, 3); _bcIndex += 1; break;
case J9BCfload0: loadAuto(TR::Float, 0); _bcIndex += 1; break;
case J9BCfload1: loadAuto(TR::Float, 1); _bcIndex += 1; break;
case J9BCfload2: loadAuto(TR::Float, 2); _bcIndex += 1; break;
case J9BCfload3: loadAuto(TR::Float, 3); _bcIndex += 1; break;
case J9BCdload0: loadAuto(TR::Double, 0); _bcIndex += 1; break;
case J9BCdload1: loadAuto(TR::Double, 1); _bcIndex += 1; break;
case J9BCdload2: loadAuto(TR::Double, 2); _bcIndex += 1; break;
case J9BCdload3: loadAuto(TR::Double, 3); _bcIndex += 1; break;
case J9BCaload0: loadAuto(TR::Address, 0); _bcIndex += 1; break;
case J9BCaload1: loadAuto(TR::Address, 1); _bcIndex += 1; break;
case J9BCaload2: loadAuto(TR::Address, 2); _bcIndex += 1; break;
case J9BCaload3: loadAuto(TR::Address, 3); _bcIndex += 1; break;
case J9BCiaload: loadArrayElement(TR::Int32); _bcIndex += 1; break;
case J9BClaload: loadArrayElement(TR::Int64); _bcIndex += 1; break;
case J9BCfaload: loadArrayElement(TR::Float); _bcIndex += 1; break;
case J9BCdaload: loadArrayElement(TR::Double); _bcIndex += 1; break;
case J9BCaaload: loadArrayElement(TR::Address); _bcIndex += 1; break;
case J9BCbaload: loadArrayElement(TR::Int8); genUnary(TR::b2i); _bcIndex += 1; break;
case J9BCcaload: loadArrayElement(TR::Int16); genUnary(TR::su2i); _bcIndex += 1; break;
case J9BCsaload: loadArrayElement(TR::Int16); genUnary(TR::s2i); _bcIndex += 1; break;
case J9BCiloadw: loadAuto(TR::Int32, next2Bytes()); _bcIndex += 3; break;
case J9BClloadw: loadAuto(TR::Int64, next2Bytes()); _bcIndex += 3; break;
case J9BCfloadw: loadAuto(TR::Float, next2Bytes()); _bcIndex += 3; break;
case J9BCdloadw: loadAuto(TR::Double, next2Bytes()); _bcIndex += 3; break;
case J9BCaloadw: loadAuto(TR::Address, next2Bytes()); _bcIndex += 3; break;
case J9BCbipush: loadConstant(TR::iconst, nextByteSigned()); _bcIndex += 2; break;
case J9BCsipush: loadConstant(TR::iconst, next2BytesSigned()); _bcIndex += 3; break;
case J9BCiload: loadAuto(TR::Int32, nextByte()); _bcIndex += 2; break;
case J9BClload: loadAuto(TR::Int64, nextByte()); _bcIndex += 2; break;
case J9BCfload: loadAuto(TR::Float, nextByte()); _bcIndex += 2; break;
case J9BCdload: loadAuto(TR::Double, nextByte()); _bcIndex += 2; break;
case J9BCaload: loadAuto(TR::Address, nextByte()); _bcIndex += 2; break;
case J9BCistore: storeAuto(TR::Int32, nextByte()); _bcIndex += 2; break;
case J9BClstore: storeAuto(TR::Int64, nextByte()); _bcIndex += 2; break;
case J9BCfstore: storeAuto(TR::Float, nextByte()); _bcIndex += 2; break;
case J9BCdstore: storeAuto(TR::Double, nextByte()); _bcIndex += 2; break;
case J9BCastore: storeAuto(TR::Address, nextByte()); _bcIndex += 2; break;
case J9BCistore0: storeAuto(TR::Int32, 0); _bcIndex += 1; break;
case J9BCistore1: storeAuto(TR::Int32, 1); _bcIndex += 1; break;
case J9BCistore2: storeAuto(TR::Int32, 2); _bcIndex += 1; break;
case J9BCistore3: storeAuto(TR::Int32, 3); _bcIndex += 1; break;
case J9BClstore0: storeAuto(TR::Int64, 0); _bcIndex += 1; break;
case J9BClstore1: storeAuto(TR::Int64, 1); _bcIndex += 1; break;
case J9BClstore2: storeAuto(TR::Int64, 2); _bcIndex += 1; break;
case J9BClstore3: storeAuto(TR::Int64, 3); _bcIndex += 1; break;
case J9BCfstore0: storeAuto(TR::Float, 0); _bcIndex += 1; break;
case J9BCfstore1: storeAuto(TR::Float, 1); _bcIndex += 1; break;
case J9BCfstore2: storeAuto(TR::Float, 2); _bcIndex += 1; break;
case J9BCfstore3: storeAuto(TR::Float, 3); _bcIndex += 1; break;
case J9BCdstore0: storeAuto(TR::Double, 0); _bcIndex += 1; break;
case J9BCdstore1: storeAuto(TR::Double, 1); _bcIndex += 1; break;
case J9BCdstore2: storeAuto(TR::Double, 2); _bcIndex += 1; break;
case J9BCdstore3: storeAuto(TR::Double, 3); _bcIndex += 1; break;
case J9BCastore0: storeAuto(TR::Address, 0); _bcIndex += 1; break;
case J9BCastore1: storeAuto(TR::Address, 1); _bcIndex += 1; break;
case J9BCastore2: storeAuto(TR::Address, 2); _bcIndex += 1; break;
case J9BCastore3: storeAuto(TR::Address, 3); _bcIndex += 1; break;
case J9BCiastore: storeArrayElement(TR::Int32); _bcIndex += 1; break;
case J9BClastore: storeArrayElement(TR::Int64); _bcIndex += 1; break;
case J9BCfastore: storeArrayElement(TR::Float); _bcIndex += 1; break;
case J9BCdastore: storeArrayElement(TR::Double); _bcIndex += 1; break;
case J9BCaastore: storeArrayElement(TR::Address); _bcIndex += 1; break;
case J9BCbastore: genUnary(TR::i2b); storeArrayElement(TR::Int8); _bcIndex += 1; break;
case J9BCcastore: genUnary(TR::i2s); storeArrayElement(TR::Int16);_bcIndex += 1; break;
case J9BCsastore: genUnary(TR::i2s); storeArrayElement(TR::Int16); _bcIndex += 1; break;
case J9BCistorew: storeAuto(TR::Int32, next2Bytes()); _bcIndex += 3; break;
case J9BClstorew: storeAuto(TR::Int64, next2Bytes()); _bcIndex += 3; break;
case J9BCfstorew: storeAuto(TR::Float, next2Bytes()); _bcIndex += 3; break;
case J9BCdstorew: storeAuto(TR::Double, next2Bytes()); _bcIndex += 3; break;
case J9BCastorew: storeAuto(TR::Address, next2Bytes()); _bcIndex += 3; break;
case J9BCpop: eat1(); _bcIndex += 1; break;
case J9BCpop2: eat2(); _bcIndex += 1; break;
case J9BCdup: dup(); _bcIndex += 1; break;
case J9BCdup2: dup2(); _bcIndex += 1; break;
case J9BCdupx1: dupx1(); _bcIndex += 1; break;
case J9BCdup2x1: dup2x1(); _bcIndex += 1; break;
case J9BCdupx2: dupx2(); _bcIndex += 1; break;
case J9BCdup2x2: dup2x2(); _bcIndex += 1; break;
case J9BCswap: swap(); _bcIndex += 1; break;
case J9BCiadd: genBinary(TR::iadd); _bcIndex += 1; break;
case J9BCladd: genBinary(TR::ladd); _bcIndex += 1; break;
case J9BCfadd: genBinary(TR::fadd); _bcIndex += 1; break;
case J9BCdadd: genBinary(TR::dadd); _bcIndex += 1; break;
case J9BCisub: genBinary(TR::isub); _bcIndex += 1; break;
case J9BClsub: genBinary(TR::lsub); _bcIndex += 1; break;
case J9BCfsub: genBinary(TR::fsub); _bcIndex += 1; break;
case J9BCdsub: genBinary(TR::dsub); _bcIndex += 1; break;
case J9BCimul: genBinary(TR::imul); _bcIndex += 1; break;
case J9BClmul: genBinary(TR::lmul); _bcIndex += 1; break;
case J9BCfmul: genBinary(TR::fmul); _bcIndex += 1; break;
case J9BCdmul: genBinary(TR::dmul); _bcIndex += 1; break;
case J9BCidiv: genIDiv(); _bcIndex += 1; break;
case J9BCldiv: genLDiv(); _bcIndex += 1; break;
case J9BCirem: genIRem(); _bcIndex += 1; break;
case J9BClrem: genLRem(); _bcIndex += 1; break;
case J9BCfdiv: genBinary(TR::fdiv); _bcIndex += 1; break;
case J9BCddiv: genBinary(TR::ddiv); _bcIndex += 1; break;
case J9BCfrem: genBinary(TR::frem); _bcIndex += 1; break;
case J9BCdrem: genBinary(TR::drem); _bcIndex += 1; break;
case J9BCineg: genUnary(TR::ineg); _bcIndex += 1; break;
case J9BClneg: genUnary(TR::lneg); _bcIndex += 1; break;
case J9BCfneg: genUnary(TR::fneg); _bcIndex += 1; break;
case J9BCdneg: genUnary(TR::dneg); _bcIndex += 1; break;
case J9BCishl: genBinary(TR::ishl); _bcIndex += 1; break;
case J9BCishr: genBinary(TR::ishr); _bcIndex += 1; break;
case J9BCiushr: genBinary(TR::iushr); _bcIndex += 1; break;
case J9BClshl: genBinary(TR::lshl); _bcIndex += 1; break;
case J9BClshr: genBinary(TR::lshr); _bcIndex += 1; break;
case J9BClushr: genBinary(TR::lushr); _bcIndex += 1; break;
case J9BCiand: genBinary(TR::iand); _bcIndex += 1; break;
case J9BCior: genBinary(TR::ior); _bcIndex += 1; break;
case J9BCixor: genBinary(TR::ixor); _bcIndex += 1; break;
case J9BCland: genBinary(TR::land); _bcIndex += 1; break;
case J9BClor: genBinary(TR::lor); _bcIndex += 1; break;
case J9BClxor: genBinary(TR::lxor); _bcIndex += 1; break;
case J9BCi2l: genUnary(TR::i2l); _bcIndex += 1; break;
case J9BCi2f: genUnary(TR::i2f); _bcIndex += 1; break;
case J9BCi2d: genUnary(TR::i2d); _bcIndex += 1; break;
case J9BCl2i: genUnary(TR::l2i); _bcIndex += 1; break;
case J9BCl2f: genUnary(TR::l2f); _bcIndex += 1; break;
case J9BCl2d: genUnary(TR::l2d); _bcIndex += 1; break;
case J9BCf2i: genUnary(TR::f2i); _bcIndex += 1; break;
case J9BCf2d: genUnary(TR::f2d); _bcIndex += 1; break;
case J9BCd2i: genUnary(TR::d2i); _bcIndex += 1; break;
case J9BCd2f: genUnary(TR::d2f); _bcIndex += 1; break;
case J9BCf2l: genUnary(TR::f2l); _bcIndex += 1; break;
case J9BCd2l: genUnary(TR::d2l); _bcIndex += 1; break;
case J9BCi2b: genUnary(TR::i2b); genUnary(TR::b2i); _bcIndex += 1; break;
case J9BCi2c: genUnary(TR::i2s); genUnary(TR::su2i); _bcIndex += 1; break;
case J9BCi2s: genUnary(TR::i2s); genUnary(TR::s2i); _bcIndex += 1; break;
case J9BCinvokevirtual: genInvokeVirtual(next2Bytes()); _bcIndex += 3; break;
case J9BCinvokespecial: genInvokeSpecial(next2Bytes()); _bcIndex += 3; break;
case J9BCinvokestatic: genInvokeStatic(next2Bytes()); _bcIndex += 3; break;
case J9BCinvokeinterface: genInvokeInterface(next2Bytes()); _bcIndex += 3; break;
case J9BCinvokedynamic:
genInvokeDynamic(next2Bytes());
_bcIndex += 3; break; // Could eventually need next3bytes
case J9BCinvokehandle:
genInvokeHandle(next2Bytes());
_bcIndex += 3; break;
case J9BCinvokehandlegeneric:
genInvokeHandleGeneric(next2Bytes());
_bcIndex += 3; break;
case J9BCinvokespecialsplit: genInvokeSpecial(next2Bytes() | J9_SPECIAL_SPLIT_TABLE_INDEX_FLAG); _bcIndex += 3; break;
case J9BCinvokestaticsplit: genInvokeStatic(next2Bytes() | J9_STATIC_SPLIT_TABLE_INDEX_FLAG); _bcIndex += 3; break;
case J9BCifeq: _bcIndex = genIfOneOperand(TR::ificmpeq); break;
case J9BCifne: _bcIndex = genIfOneOperand(TR::ificmpne); break;
case J9BCiflt: _bcIndex = genIfOneOperand(TR::ificmplt); break;
case J9BCifge: _bcIndex = genIfOneOperand(TR::ificmpge); break;
case J9BCifgt: _bcIndex = genIfOneOperand(TR::ificmpgt); break;
case J9BCifle: _bcIndex = genIfOneOperand(TR::ificmple); break;
case J9BCifnull: _bcIndex = genIfOneOperand(TR::ifacmpeq); break;
case J9BCifnonnull: _bcIndex = genIfOneOperand(TR::ifacmpne); break;
case J9BCificmpeq: _bcIndex = genIfTwoOperand(TR::ificmpeq); break;
case J9BCificmpne: _bcIndex = genIfTwoOperand(TR::ificmpne); break;
case J9BCificmplt: _bcIndex = genIfTwoOperand(TR::ificmplt); break;
case J9BCificmpge: _bcIndex = genIfTwoOperand(TR::ificmpge); break;
case J9BCificmpgt: _bcIndex = genIfTwoOperand(TR::ificmpgt); break;
case J9BCificmple: _bcIndex = genIfTwoOperand(TR::ificmple); break;
case J9BCifacmpeq: _bcIndex = genIfAcmpEqNe(TR::ifacmpeq); break;
case J9BCifacmpne: _bcIndex = genIfAcmpEqNe(TR::ifacmpne); break;
case J9BClcmp: _bcIndex = cmp(TR::lcmp, _lcmpOps, lastIndex); break;
case J9BCfcmpl: _bcIndex = cmp(TR::fcmpl, _fcmplOps, lastIndex); break;
case J9BCfcmpg: _bcIndex = cmp(TR::fcmpg, _fcmpgOps, lastIndex); break;
case J9BCdcmpl: _bcIndex = cmp(TR::dcmpl, _dcmplOps, lastIndex); break;
case J9BCdcmpg: _bcIndex = cmp(TR::dcmpg, _dcmpgOps, lastIndex); break;
case J9BCtableswitch: _bcIndex = genTableSwitch (); break;
case J9BClookupswitch: _bcIndex = genLookupSwitch(); break;
case J9BCgoto: _bcIndex = genGoto(_bcIndex + next2BytesSigned()); break;
case J9BCgotow: _bcIndex = genGoto(_bcIndex + next4BytesSigned()); break;
case J9BCmonitorenter: genMonitorEnter(); _bcIndex += 1; break;
case J9BCmonitorexit: genMonitorExit(false); _bcIndex += 1; break;
case J9BCathrow: _bcIndex = genAThrow(); break;
case J9BCarraylength: genArrayLength(); _bcIndex += 1; break;
case J9BCgetstatic: loadStatic(next2Bytes()); _bcIndex += 3; break;
case J9BCgetfield: loadInstance(next2Bytes()); _bcIndex += 3; break;
case J9BCputstatic: storeStatic(next2Bytes()); _bcIndex += 3; break;
case J9BCputfield: storeInstance(next2Bytes()); _bcIndex += 3; break;
case J9BCcheckcast: genCheckCast(next2Bytes()); _bcIndex += 3; break;
case J9BCinstanceof: genInstanceof(next2Bytes()); _bcIndex += 3; break;
case J9BCnew: genNew(next2Bytes()); _bcIndex += 3; break;
case J9BCnewarray: genNewArray(nextByte()); _bcIndex += 2; break;
case J9BCanewarray: genANewArray(next2Bytes()); _bcIndex += 3; break;
case J9BCmultianewarray: genMultiANewArray(next2Bytes(), _code[_bcIndex+3]); _bcIndex += 4; break;
case J9BCiinc: genInc(); _bcIndex += 3; break;
case J9BCiincw: genIncLong(); _bcIndex += 5; break;
case J9BCwide:
{
int32_t wopcode = _code[++_bcIndex];
TR_J9ByteCode wbc = convertOpCodeToByteCodeEnum(wopcode);
if (_bcIndex > lastIndex)
lastIndex = _bcIndex;
if (wbc == J9BCiinc)
{ genIncLong(); _bcIndex += 5; break; }
switch (wbc)
{
case J9BCiload: loadAuto(TR::Int32, next2Bytes()); break;
case J9BClload: loadAuto(TR::Int64, next2Bytes()); break;
case J9BCfload: loadAuto(TR::Float, next2Bytes()); break;
case J9BCdload: loadAuto(TR::Double, next2Bytes()); break;
case J9BCaload: loadAuto(TR::Address, next2Bytes()); break;
case J9BCistore: storeAuto(TR::Int32, next2Bytes()); break;
case J9BClstore: storeAuto(TR::Int64, next2Bytes()); break;
case J9BCfstore: storeAuto(TR::Float, next2Bytes()); break;
case J9BCdstore: storeAuto(TR::Double, next2Bytes()); break;
case J9BCastore: storeAuto(TR::Address, next2Bytes()); break;
default: break;
}
_bcIndex += 3;
break;
}
case J9BCgenericReturn:
case J9BCReturnC:
case J9BCReturnS:
case J9BCReturnB:
case J9BCReturnZ:
_bcIndex = genReturn(method()->returnOpCode(), method()->isSynchronized());
break;
case J9BCbreakpoint:
fej9()->unsupportedByteCode(comp(), opcode);
case J9BCunknown:
fej9()->unknownByteCode(comp(), opcode);
break;
default:
break;
}
if (comp()->getOption(TR_TraceILGen))
{
TR::StackMemoryRegion stackMemoryRegion(*comp()->trMemory());
TR_BitVector beforeTreesInserted(comp()->getNodeCount(), trMemory(), stackAlloc, growable);
TR_BitVector afterTreesInserted (comp()->getNodeCount(), trMemory(), stackAlloc, growable);
comp()->getDebug()->saveNodeChecklist(beforeTreesInserted);
printTrees(comp(), traceStart->getNextTreeTop(), traceStop, "trees inserted");
comp()->getDebug()->saveNodeChecklist(afterTreesInserted);
// Commoning in the "stack after" printout should match that in the
// "trees inserted" printout.
//
// NOTE: this is disabled because it prints (potentially large) trees
// twice for no particular benefit. Instead, we have opted to have
// the "stack after" printout appear to be "commoned" with the "trees
// inserted" printout. This might cause some minor confusion when the
// "stack after" section contains nodes with refcount=1 that appear to
// be commoned, but this overall clarity seems to favour the terser format.
//
//comp()->getDebug()->restoreNodeChecklist(beforeTreesInserted);
printStack(comp(), _stack, "stack after");
traceMsg(comp(), " ============================================================\n");
// Commoning from now on will reflect trees already inserted, not
// those that happened to appear on the stack. (The desirability
// of the resulting verbosity is debatable.)
//
comp()->getDebug()->restoreNodeChecklist(afterTreesInserted);
}
}
if( _blocksToInline) // partial inlining - only generate goto if its in the list of blocks.
{
if(_blocksToInline->getHighestBCIndex() > lastIndex)
{
lastIndex = _blocksToInline->getHighestBCIndex();
//printf("Walker: setting lastIndex to %d\n",lastIndex);
}
if(_blocksToInline->getLowestBCIndex() < firstIndex)
{
firstIndex = _blocksToInline->getLowestBCIndex();
//printf("Walker: setting firstIndex to %d\n",firstIndex);
}
}
// join the basic blocks
//
TR::Block * lastBlock = NULL, * nextBlock, * block = blocks(firstIndex);
if (firstIndex == 0)
cfg()->addEdge(cfg()->getStart(), block);
else
prevBlock->getExit()->join(block->getEntry());
for (i = firstIndex; block; lastBlock = block, block = nextBlock)
{
while (block->getNextBlock())
{
TR_ASSERT( block->isAdded(), "Block should have already been added\n" );
block = block->getNextBlock();
}
block->setIsAdded();
for (nextBlock = 0; !nextBlock && ++i <= lastIndex; )
if (isGenerated(i) && blocks(i) && !blocks(i)->isAdded())
nextBlock = blocks(i);
// If an exception range ends with an if and the fall through is
// in the main-line code then we have to generate a fall through block
// which contains a goto to jump back to the main-line code.
//
TR::Node * lastRealNode = block->getLastRealTreeTop()->getNode();
if (!nextBlock && lastRealNode->getOpCode().isIf())
{
nextBlock = TR::Block::createEmptyBlock(comp());
i = lastIndex;
if(_blocksToInline)
{
if(!blocks(i+3))
{
TR_ASSERT(_blocksToInline->hasGeneratedRestartTree(),"Fall Thru Block doesn't exist and we don't have a restart tree.\n");
nextBlock->append(
TR::TreeTop::create(comp(),
TR::Node::create(lastRealNode, TR::Goto, 0, _blocksToInline->getGeneratedRestartTree())));
}
else
{
nextBlock->append(
TR::TreeTop::create(comp(),
TR::Node::create(lastRealNode, TR::Goto, 0, blocks(i + 3)->getEntry())));
}
}
else
{
TR_ASSERT(blocks(i + 3), "can't find the fall thru block");
nextBlock->append(
TR::TreeTop::create(comp(),
TR::Node::create(lastRealNode, TR::Goto, 0, blocks(i + 3)->getEntry())));
}
}
block->getExit()->getNode()->copyByteCodeInfo(lastRealNode);
cfg()->insertBefore(block, nextBlock);
}
if(_blocksToInline && _blocksToInline->hasGeneratedRestartTree())
{
_blocksToInline->getGeneratedRestartTree()->getEnclosingBlock()->setIsCold();
_blocksToInline->getGeneratedRestartTree()->getEnclosingBlock()->setFrequency(1);
}
return lastBlock;
}
//----------------------------------------------
// walker helper routines
//----------------------------------------------
int32_t
TR_J9ByteCodeIlGenerator::cmp(TR::ILOpCodes cmpOpcode, TR::ILOpCodes * combinedOpcodes, int32_t & lastIndex)
{
int32_t nextBCIndex = _bcIndex + 1;
uint8_t nextOpcode = _code[nextBCIndex];
// can't generate the async check here if someone is jumping to it
//
if (convertOpCodeToByteCodeEnum(nextOpcode) == J9BCasyncCheck && blocks(nextBCIndex) == 0)
{
genAsyncCheck();
nextBCIndex = ++_bcIndex + 1;
nextOpcode = _code[nextBCIndex];
if (_bcIndex > lastIndex)
lastIndex = _bcIndex;
}
TR::ILOpCodes combinedOpcode;
switch (convertOpCodeToByteCodeEnum(nextOpcode))
{
case J9BCifeq: combinedOpcode = combinedOpcodes[0]; break;
case J9BCifne: combinedOpcode = combinedOpcodes[1]; break;
case J9BCiflt: combinedOpcode = combinedOpcodes[2]; break;
case J9BCifge: combinedOpcode = combinedOpcodes[3]; break;
case J9BCifgt: combinedOpcode = combinedOpcodes[4]; break;
case J9BCifle: combinedOpcode = combinedOpcodes[5]; break;
default: combinedOpcode = TR::BadILOp; break;
}
// don't combine the opcodes if someone is jumping to the if
//
if (combinedOpcode != TR::BadILOp && blocks(nextBCIndex) == 0)
return cmpFollowedByIf(nextOpcode, combinedOpcode, lastIndex);
genBinary(cmpOpcode);
genUnary(TR::b2i);
return _bcIndex + 1;
}
int32_t
TR_J9ByteCodeIlGenerator::cmpFollowedByIf(uint8_t ifOpcode, TR::ILOpCodes combinedOpcode, int32_t & lastIndex)
{
int32_t branchOffset = next2BytesSigned(2); // The 2 bytes after the compare bytecode is the branch offset
// If asynccheck is needed, generate it before incrementing _bcIndex such that it has the bytecode index of
// the compare bytecode.
if (branchOffset <= 0)
{
genAsyncCheck();
}
if (++_bcIndex > lastIndex)
lastIndex = _bcIndex;
return genIfImpl(combinedOpcode);
}
//----------------------------------------------
// gen helper routines
//----------------------------------------------
TR::SymbolReference *
TR_J9ByteCodeIlGenerator::placeholderWithDummySignature()
{
// Note: signatures should always be correct. Only call this to pass the
// result to something like genNodeAndPopChildren which will expand the
// signature properly.
if (comp()->getOption(TR_TraceMethodIndex))
traceMsg(comp(), "placeholderWithDummySignature using owning symbol M%p _methodSymbol: M%p\n", comp()->getJittedMethodSymbol(), _methodSymbol);
// Note that we use comp()->getJittedMethodSymbol() instead of _methodSymbol here.
// The caller doesn't matter for this special method, and there's no need to make
// potentially hundreds of symbols for the same method.
//
return comp()->getSymRefTab()->methodSymRefFromName(comp()->getJittedMethodSymbol(), JSR292_ILGenMacros, JSR292_placeholder, JSR292_placeholderSig, TR::MethodSymbol::Static);
}
TR::SymbolReference *
TR_J9ByteCodeIlGenerator::placeholderWithSignature(const char *prefix, int prefixLength, const char *middle, int middleLength, const char *suffix, int suffixLength)
{
return symRefWithArtificialSignature(placeholderWithDummySignature(),
".#.#.#",
prefix, prefixLength,
middle, middleLength,
suffix, suffixLength);
}
TR::SymbolReference *
TR_J9ByteCodeIlGenerator::symRefWithArtificialSignature(TR::SymbolReference *original, const char *effectiveSigFormat, ...)
{
TR::StackMemoryRegion stackMemoryRegion(*comp()->trMemory());
va_list args;
va_start(args, effectiveSigFormat);
char *effectiveSig = vartificialSignature(stackAlloc, effectiveSigFormat, args);
va_end(args);
TR::SymbolReference *result = comp()->getSymRefTab()->methodSymRefWithSignature(original, effectiveSig, strlen(effectiveSig));
return result;
}
static int32_t processArtificialSignature(char *result, size_t maxResult, const char *format, va_list args)
{
int32_t resultLength = 0;
char *cur = result;
for (int32_t i = 0; format[i]; i++)
{
int32_t length = -1;
const char *startChar = NULL;
if (format[i] == '.') // period is the ONLY character (besides null) that can never appear in a method signature
{
// Formatting code
switch (format[++i])
{
case '@': // insert a single given arg out of a given signature
{
char *sig = va_arg(args, char*);
int n = va_arg(args, int);
startChar = nthSignatureArgument(n, sig+1);
length = nextSignatureArgument(startChar) - startChar;
break;
}
case '-': // insert a given range of args out of a given signature
{
char *sig = va_arg(args, char*);
int firstN = va_arg(args, int);
int lastN = va_arg(args, int);
if (lastN >= firstN)
{
startChar = nthSignatureArgument(firstN, sig+1);
length = nthSignatureArgument(lastN+1, sig+1) - startChar;
}
else
{
startChar = "";
length = 0;
}
break;
}
case '*': // insert args from a given one onward, out of a given signature
{
char *sig = va_arg(args, char*);
int firstN = va_arg(args, int);
startChar = nthSignatureArgument(firstN, sig+1);
length = strchr(startChar, ')') - startChar;
break;
}
case '$': // insert return type from a given signature
{
char *sig = va_arg(args, char*);
startChar = strchr(sig, ')') + 1;
length = nextSignatureArgument(startChar) - startChar;
break;
}
case '?': // insert a given null-terminated string
{
startChar = va_arg(args, char*);
length = strlen(startChar);
break;
}
case '#': // insert a given number of characters out of a given string
{
startChar = va_arg(args, char*);
length = va_arg(args, int);
break;
}
default: // literal character
TR_ASSERT(0, "Unexpected artificial signature formatting character '%c'", format[i]);
// If we reach this point, either TR has a bug, or we have actually somehow
// encountered a signature that legitimately had a period in it. In the latter
// case, proceed on the assumption that the period was a literal character;
// if TR has a bug, we will very likely crash soon enough anyway.
//
startChar = format + i - 1; // back up to the period
length = 2;
break;
}
}
else
{
// Literal character
startChar = format + i;
length = 1;
}
TR_ASSERT(length >= 0, "assertion failure");
TR_ASSERT(startChar != NULL, "assertion failure");
if (result)
{
int len = snprintf(cur, maxResult - resultLength, "%.*s", length, startChar);
if ((0 < len) && ((size_t)len <= (maxResult - resultLength)))
{
cur += len;
resultLength += len;
}
}
else
{
resultLength += length;
}
}
return resultLength;
}
char *TR_J9ByteCodeIlGenerator::artificialSignature(TR_AllocationKind allocKind, const char *format, ...)
{
va_list args;
va_start(args, format);
char *result = vartificialSignature(allocKind, format, args);
va_end(args);
return result;
}
char *TR_J9ByteCodeIlGenerator::vartificialSignature(TR_AllocationKind allocKind, const char *format, va_list args)
{
// Compute size
//
va_list argsCopy;
va_copy(argsCopy, args);
int32_t resultLength = processArtificialSignature(NULL, 0, format, argsCopy);
va_copy_end(argsCopy);
// Produce formatted signature
//
char *result = (char*)trMemory()->allocateMemory(resultLength+1, allocKind);
processArtificialSignature(result, resultLength + 1, format, args);
return result;
}
void
TR_J9ByteCodeIlGenerator::genArgPlaceholderCall()
{
// Create argument load nodes
//
int32_t numNodesGenerated = 0;
ListIterator<TR::ParameterSymbol> i(&_methodSymbol->getParameterList());
for (TR::ParameterSymbol *parm = i.getFirst(); parm; parm = i.getNext())
{
if (parm->getSlot() >= _argPlaceholderSlot)
{
// What a convoluted way to get a symref from a symbol...
TR::SymbolReference *symRef = _methodSymbol->getParmSymRef(parm->getSlot());
push(TR::Node::createLoad(symRef));
numNodesGenerated++;
}
}
// Create placeholder call with the proper signature
//
char *callerSignature = _methodSymbol->getResolvedMethod()->signatureChars();
char *callerExpandedArgsStart = callerSignature + _argPlaceholderSignatureOffset;
int32_t lengthOfExpandedArgs = strcspn(callerExpandedArgsStart, ")");
TR::SymbolReference *placeholderSymRef = placeholderWithSignature("(", 1, callerExpandedArgsStart, lengthOfExpandedArgs, ")I", 2);
push(genNodeAndPopChildren(TR::icall, numNodesGenerated, placeholderSymRef));
}
static bool isPlaceholderCall(TR::Node *node)
{
if (node->getOpCode().isCall() && node->getSymbol()->getResolvedMethodSymbol())
return node->getSymbol()->castToResolvedMethodSymbol()->getMandatoryRecognizedMethod() == TR::java_lang_invoke_ILGenMacros_placeholder;
else
return false;
}
int32_t
TR_J9ByteCodeIlGenerator::expandPlaceholderCall()
{
TR::Node *placeholder = pop();
TR_ASSERT(isPlaceholderCall(placeholder), "expandPlaceholderCall expects placeholder call on top of stack");
if (comp()->getOption(TR_TraceILGen))
traceMsg(comp(), " Expanding placeholder call %s\n", comp()->getDebug()->getName(placeholder->getSymbolReference()));
for (int i = 0; i < placeholder->getNumChildren(); i++)
push(placeholder->getAndDecChild(i));
return placeholder->getNumChildren()-1; // there was already 1 for the placeholder itself
}
TR::SymbolReference *
TR_J9ByteCodeIlGenerator::expandPlaceholderSignature(TR::SymbolReference *symRef, int32_t numArgs)
{
return expandPlaceholderSignature(symRef, numArgs, numArgs);
}
TR::SymbolReference *
TR_J9ByteCodeIlGenerator::expandPlaceholderSignature(TR::SymbolReference *symRef, int32_t numArgs, int32_t firstArgStackDepth)
{
if (!symRef->getSymbol()->getResolvedMethodSymbol())
return symRef;
TR_ResolvedMethod *originalMethod = symRef->getSymbol()->castToResolvedMethodSymbol()->getResolvedMethod();
int32_t firstArgStackOffset = _stack->size() - firstArgStackDepth;
int32_t currentArgSignatureOffset = 1; // skip parenthesis
for (int32_t childIndex = originalMethod->isStatic()? 0 : 1; childIndex < numArgs; childIndex++)
{
int32_t explicitArgIndex = childIndex - (originalMethod->isStatic()? 0 : 1);
TR_ResolvedMethod *symRefMethod = symRef->getSymbol()->castToResolvedMethodSymbol()->getResolvedMethod();
char *signatureChars = symRefMethod->signatureChars();
int nextArgSignatureOffset = nextSignatureArgument(signatureChars + currentArgSignatureOffset) - signatureChars;
TR_ASSERT(signatureChars[currentArgSignatureOffset] != ')', "expandPlaceholderSignature must not walk past the end of the argument portion of the signature");
TR::Node *child = _stack->element(firstArgStackOffset + childIndex);
if (isPlaceholderCall(child))
{
// Replace the current argument's signature chars with the chars between the parentheses of the child's signature
int32_t signatureLength = symRefMethod->signatureLength();
char *childSignatureChars = child->getSymbol()->castToResolvedMethodSymbol()->getResolvedMethod()->signatureChars();
int32_t numCharsInserted = strcspn(childSignatureChars+1, ")");
symRef = symRefWithArtificialSignature(symRef,
".#.#.#", // TODO:JSR292: It may be possible to simplify this logic drastically with a more clever format
signatureChars, currentArgSignatureOffset,
childSignatureChars+1, numCharsInserted,
signatureChars+nextArgSignatureOffset, signatureLength - nextArgSignatureOffset);
// This doesn't work...
// "(-**)$",