Mercurial > hg > truffle
view graal/GraalCompiler/src/com/sun/c1x/graph/GraphBuilder.java @ 2844:fa6fd3974058
IdealGraphVisualizer: Integrate Text Editor module, add some required C1XVisualizer classes
author | Peter Hofer <peter.hofer@jku.at> |
---|---|
date | Wed, 01 Jun 2011 16:55:36 +0200 |
parents | 7596ae867a7b |
children | 7474789a8120 7f14e6b48a9c |
line wrap: on
line source
/* * Copyright (c) 2009, 2011, Oracle and/or its affiliates. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package com.sun.c1x.graph; import static com.sun.cri.bytecode.Bytecodes.*; import static java.lang.reflect.Modifier.*; import java.lang.reflect.*; import java.util.*; import com.oracle.graal.graph.*; import com.oracle.max.graal.schedule.*; import com.sun.c1x.*; import com.sun.c1x.debug.*; import com.sun.c1x.graph.BlockMap.Block; import com.sun.c1x.graph.BlockMap.ExceptionBlock; import com.sun.c1x.ir.*; import com.sun.c1x.util.*; import com.sun.c1x.value.*; import com.sun.cri.bytecode.*; import com.sun.cri.ci.*; import com.sun.cri.ri.*; import com.sun.cri.ri.RiType.Representation; /** * The {@code GraphBuilder} class parses the bytecode of a method and builds the IR graph. * A number of optimizations may be performed during parsing of the bytecode, including value * numbering, inlining, constant folding, strength reduction, etc. */ public final class GraphBuilder { /** * The minimum value to which {@link C1XOptions#TraceBytecodeParserLevel} must be set to trace * the bytecode instructions as they are parsed. */ public static final int TRACELEVEL_INSTRUCTIONS = 1; /** * The minimum value to which {@link C1XOptions#TraceBytecodeParserLevel} must be set to trace * the frame state before each bytecode instruction as it is parsed. */ public static final int TRACELEVEL_STATE = 2; private final C1XCompilation compilation; private final CompilerGraph graph; private final CiStatistics stats; private final RiRuntime runtime; private final RiMethod method; private final RiConstantPool constantPool; private final BytecodeStream stream; // the bytecode stream private final LogStream log; private final FrameStateBuilder frameState; // the current execution state // bci-to-block mapping private Block[] blockFromBci; private ArrayList<Block> blockList; private int nextBlockNumber; private Value methodSynchronizedObject; private CiExceptionHandler syncHandler; private Block unwindBlock; private Block returnBlock; // the worklist of blocks, sorted by depth first number private final PriorityQueue<Block> workList = new PriorityQueue<Block>(10, new Comparator<Block>() { public int compare(Block o1, Block o2) { return o1.blockID - o2.blockID; } }); private Instruction lastInstr; // the last instruction added private final Set<Block> blocksOnWorklist = new HashSet<Block>(); private final Set<Block> blocksVisited = new HashSet<Block>(); /** * Creates a new, initialized, {@code GraphBuilder} instance for a given compilation. * * @param compilation the compilation * @param ir the IR to build the graph into * @param graph */ public GraphBuilder(C1XCompilation compilation, RiMethod method, CompilerGraph graph) { this.compilation = compilation; this.graph = graph; this.runtime = compilation.runtime; this.method = method; this.stats = compilation.stats; this.log = C1XOptions.TraceBytecodeParserLevel > 0 ? new LogStream(TTY.out()) : null; this.stream = new BytecodeStream(method.code()); this.constantPool = runtime.getConstantPool(method); this.frameState = new FrameStateBuilder(method, graph); } /** * Builds the graph for a the specified {@code IRScope}. * @param scope the top IRScope */ public void build() { if (log != null) { log.println(); log.println("Compiling " + method); } // 2. compute the block map, setup exception handlers and get the entrypoint(s) BlockMap blockMap = compilation.getBlockMap(method); blockList = new ArrayList<Block>(blockMap.blocks); blockFromBci = new Block[method.code().length]; for (int i = 0; i < blockList.size(); i++) { int blockID = nextBlockNumber(); assert blockID == i; Block block = blockList.get(i); if (block.startBci >= 0) { blockFromBci[block.startBci] = block; } } // 1. create the start block Block startBlock = nextBlock(Instruction.SYNCHRONIZATION_ENTRY_BCI); markOnWorkList(startBlock); lastInstr = createTarget(startBlock, frameState); graph.start().setStart(lastInstr); if (isSynchronized(method.accessFlags())) { // 4A.1 add a monitor enter to the start block methodSynchronizedObject = synchronizedObject(frameState, method); genMonitorEnter(methodSynchronizedObject, Instruction.SYNCHRONIZATION_ENTRY_BCI); // 4A.2 finish the start block finishStartBlock(startBlock); // 4A.3 setup an exception handler to unlock the root method synchronized object syncHandler = new CiExceptionHandler(0, method.code().length, Instruction.SYNCHRONIZATION_ENTRY_BCI, 0, null); } else { // 4B.1 simply finish the start block finishStartBlock(startBlock); } // 5. SKIPPED: look for intrinsics // 6B.1 do the normal parsing addToWorkList(blockFromBci[0]); iterateAllBlocks(); // remove Placeholders for (Node n : graph.getNodes()) { if (n instanceof Placeholder) { Placeholder p = (Placeholder) n; assert p.blockPredecessors().size() == 1; Node pred = p.blockPredecessors().get(0); int predIndex = p.predecessorsIndex().get(0); pred.successors().setAndClear(predIndex, p, 0); p.delete(); } } // remove FrameStates for (Node n : graph.getNodes()) { if (n instanceof FrameState) { boolean delete = false; if (n.usages().size() == 0 && n.predecessors().size() == 0) { delete = true; } if (delete) { n.delete(); } } } } private int nextBlockNumber() { stats.blockCount++; return nextBlockNumber++; } private Block nextBlock(int bci) { Block block = new Block(); block.startBci = bci; block.endBci = bci; block.blockID = nextBlockNumber(); return block; } private Block unwindBlock() { if (unwindBlock == null) { unwindBlock = new Block(); unwindBlock.startBci = Instruction.SYNCHRONIZATION_ENTRY_BCI; unwindBlock.endBci = Instruction.SYNCHRONIZATION_ENTRY_BCI; unwindBlock.blockID = nextBlockNumber(); addToWorkList(unwindBlock); } return unwindBlock; } private Block returnBlock() { if (returnBlock == null) { returnBlock = new Block(); returnBlock.startBci = Instruction.SYNCHRONIZATION_ENTRY_BCI; returnBlock.endBci = Instruction.SYNCHRONIZATION_ENTRY_BCI; returnBlock.blockID = nextBlockNumber(); addToWorkList(returnBlock); } return returnBlock; } private void markOnWorkList(Block block) { blocksOnWorklist.add(block); } private boolean isOnWorkList(Block block) { return blocksOnWorklist.contains(block); } private void markVisited(Block block) { blocksVisited.add(block); } private boolean isVisited(Block block) { return blocksVisited.contains(block); } private void finishStartBlock(Block startBlock) { assert bci() == 0; Instruction target = createTargetAt(0, frameState); appendGoto(target); } public void mergeOrClone(Block target, FrameStateAccess newState) { Instruction first = target.firstInstruction; if (target.isLoopHeader && isVisited(target)) { first = ((LoopBegin) first).loopEnd(); } assert first instanceof StateSplit; int bci = target.startBci; FrameState existingState = ((StateSplit) first).stateBefore(); if (existingState == null) { // copy state because it is modified FrameState duplicate = newState.duplicate(bci); // if the block is a loop header, insert all necessary phis if (first instanceof LoopBegin && target.isLoopHeader) { assert first instanceof Merge; insertLoopPhis((Merge) first, duplicate); ((Merge) first).setStateBefore(duplicate); } else { ((StateSplit) first).setStateBefore(duplicate); } } else { if (!C1XOptions.AssumeVerifiedBytecode && !existingState.isCompatibleWith(newState)) { // stacks or locks do not match--bytecodes would not verify TTY.println(existingState.toString()); TTY.println(newState.duplicate(0).toString()); throw new CiBailout("stack or locks do not match"); } assert existingState.localsSize() == newState.localsSize(); assert existingState.stackSize() == newState.stackSize(); if (first instanceof Placeholder) { assert !target.isLoopHeader; Merge merge = new Merge(graph); Placeholder p = (Placeholder) first; assert p.next() == null; p.replace(merge); target.firstInstruction = merge; merge.setStateBefore(existingState); first = merge; } existingState.merge((Merge) first, newState); } for (int j = 0; j < frameState.localsSize() + frameState.stackSize(); ++j) { if (frameState.valueAt(j) != null) { assert !frameState.valueAt(j).isDeleted(); } } } private void insertLoopPhis(Merge merge, FrameState newState) { int stackSize = newState.stackSize(); for (int i = 0; i < stackSize; i++) { // always insert phis for the stack Value x = newState.stackAt(i); if (x != null) { newState.setupPhiForStack(merge, i).addInput(x); } } int localsSize = newState.localsSize(); for (int i = 0; i < localsSize; i++) { Value x = newState.localAt(i); if (x != null) { newState.setupPhiForLocal(merge, i).addInput(x); } } } public BytecodeStream stream() { return stream; } public int bci() { return stream.currentBCI(); } private void loadLocal(int index, CiKind kind) { frameState.push(kind, frameState.loadLocal(index)); } private void storeLocal(CiKind kind, int index) { frameState.storeLocal(index, frameState.pop(kind)); } public boolean covers(RiExceptionHandler handler, int bci) { return handler.startBCI() <= bci && bci < handler.endBCI(); } public boolean isCatchAll(RiExceptionHandler handler) { return handler.catchTypeCPI() == 0; } private Instruction handleException(Value exceptionObject, int bci) { assert bci == Instruction.SYNCHRONIZATION_ENTRY_BCI || bci == bci() : "invalid bci"; RiExceptionHandler firstHandler = null; RiExceptionHandler[] exceptionHandlers = method.exceptionHandlers(); // join with all potential exception handlers if (exceptionHandlers != null) { for (RiExceptionHandler handler : exceptionHandlers) { // if the handler covers this bytecode index, add it to the list if (covers(handler, bci)) { firstHandler = handler; break; } } } if (firstHandler == null) { firstHandler = syncHandler; } if (firstHandler != null) { compilation.setHasExceptionHandlers(); Block dispatchBlock = null; for (Block block : blockList) { if (block instanceof ExceptionBlock) { ExceptionBlock excBlock = (ExceptionBlock) block; if (excBlock.handler == firstHandler) { dispatchBlock = block; break; } } } // if there's no dispatch block then the catch block needs to be a catch all if (dispatchBlock == null) { assert isCatchAll(firstHandler); int handlerBCI = firstHandler.handlerBCI(); if (handlerBCI == Instruction.SYNCHRONIZATION_ENTRY_BCI) { dispatchBlock = unwindBlock(); } else { dispatchBlock = blockFromBci[handlerBCI]; } } FrameState entryState = frameState.duplicateWithEmptyStack(bci); StateSplit entry = new Placeholder(graph); entry.setStateBefore(entryState); Instruction currentNext = entry; Value currentExceptionObject = exceptionObject; if (currentExceptionObject == null) { ExceptionObject exception = new ExceptionObject(graph); entry.setNext(exception); currentNext = exception; currentExceptionObject = exception; } FrameState stateWithException = entryState.duplicateModified(bci, CiKind.Void, currentExceptionObject); Instruction successor = createTarget(dispatchBlock, stateWithException); currentNext.setNext(successor); return entry; } return null; } private void genLoadConstant(int cpi) { Object con = constantPool.lookupConstant(cpi); if (con instanceof RiType) { // this is a load of class constant which might be unresolved RiType riType = (RiType) con; if (!riType.isResolved()) { append(new Deoptimize(graph)); frameState.push(CiKind.Object, append(Constant.forObject(null, graph))); } else { frameState.push(CiKind.Object, append(new Constant(riType.getEncoding(Representation.JavaClass), graph))); } } else if (con instanceof CiConstant) { CiConstant constant = (CiConstant) con; frameState.push(constant.kind.stackKind(), appendConstant(constant)); } else { throw new Error("lookupConstant returned an object of incorrect type"); } } private void genLoadIndexed(CiKind kind) { Value index = frameState.ipop(); Value array = frameState.apop(); Value length = append(new ArrayLength(array, graph)); Value v = append(new LoadIndexed(array, index, length, kind, graph)); frameState.push(kind.stackKind(), v); } private void genStoreIndexed(CiKind kind) { Value value = frameState.pop(kind.stackKind()); Value index = frameState.ipop(); Value array = frameState.apop(); Value length = append(new ArrayLength(array, graph)); StoreIndexed result = new StoreIndexed(array, index, length, kind, value, graph); append(result); } private void stackOp(int opcode) { switch (opcode) { case POP: { frameState.xpop(); break; } case POP2: { frameState.xpop(); frameState.xpop(); break; } case DUP: { Value w = frameState.xpop(); frameState.xpush(w); frameState.xpush(w); break; } case DUP_X1: { Value w1 = frameState.xpop(); Value w2 = frameState.xpop(); frameState.xpush(w1); frameState.xpush(w2); frameState.xpush(w1); break; } case DUP_X2: { Value w1 = frameState.xpop(); Value w2 = frameState.xpop(); Value w3 = frameState.xpop(); frameState.xpush(w1); frameState.xpush(w3); frameState.xpush(w2); frameState.xpush(w1); break; } case DUP2: { Value w1 = frameState.xpop(); Value w2 = frameState.xpop(); frameState.xpush(w2); frameState.xpush(w1); frameState.xpush(w2); frameState.xpush(w1); break; } case DUP2_X1: { Value w1 = frameState.xpop(); Value w2 = frameState.xpop(); Value w3 = frameState.xpop(); frameState.xpush(w2); frameState.xpush(w1); frameState.xpush(w3); frameState.xpush(w2); frameState.xpush(w1); break; } case DUP2_X2: { Value w1 = frameState.xpop(); Value w2 = frameState.xpop(); Value w3 = frameState.xpop(); Value w4 = frameState.xpop(); frameState.xpush(w2); frameState.xpush(w1); frameState.xpush(w4); frameState.xpush(w3); frameState.xpush(w2); frameState.xpush(w1); break; } case SWAP: { Value w1 = frameState.xpop(); Value w2 = frameState.xpop(); frameState.xpush(w1); frameState.xpush(w2); break; } default: throw Util.shouldNotReachHere(); } } private void genArithmeticOp(CiKind kind, int opcode) { genArithmeticOp(kind, opcode, false); } private void genArithmeticOp(CiKind kind, int opcode, boolean canTrap) { genArithmeticOp(kind, opcode, kind, kind, canTrap); } private void genArithmeticOp(CiKind result, int opcode, CiKind x, CiKind y, boolean canTrap) { Value yValue = frameState.pop(y); Value xValue = frameState.pop(x); Value result1 = append(new ArithmeticOp(opcode, result, xValue, yValue, isStrict(method.accessFlags()), canTrap, graph)); frameState.push(result, result1); } private void genNegateOp(CiKind kind) { frameState.push(kind, append(new NegateOp(frameState.pop(kind), graph))); } private void genShiftOp(CiKind kind, int opcode) { Value s = frameState.ipop(); Value x = frameState.pop(kind); frameState.push(kind, append(new ShiftOp(opcode, x, s, graph))); } private void genLogicOp(CiKind kind, int opcode) { Value y = frameState.pop(kind); Value x = frameState.pop(kind); frameState.push(kind, append(new LogicOp(opcode, x, y, graph))); } private void genCompareOp(CiKind kind, int opcode, CiKind resultKind) { Value y = frameState.pop(kind); Value x = frameState.pop(kind); Value value = append(new CompareOp(opcode, resultKind, x, y, graph)); if (!resultKind.isVoid()) { frameState.ipush(value); } } private void genConvert(int opcode, CiKind from, CiKind to) { CiKind tt = to.stackKind(); frameState.push(tt, append(new Convert(opcode, frameState.pop(from.stackKind()), tt, graph))); } private void genIncrement() { int index = stream().readLocalIndex(); int delta = stream().readIncrement(); Value x = frameState.localAt(index); Value y = append(Constant.forInt(delta, graph)); frameState.storeLocal(index, append(new ArithmeticOp(IADD, CiKind.Int, x, y, isStrict(method.accessFlags()), false, graph))); } private void genGoto(int fromBCI, int toBCI) { appendGoto(createTargetAt(toBCI, frameState)); } private void ifNode(Value x, Condition cond, Value y) { assert !x.isDeleted() && !y.isDeleted(); If ifNode = new If(x, cond, y, graph); append(ifNode); Instruction tsucc = createTargetAt(stream().readBranchDest(), frameState); ifNode.setBlockSuccessor(0, tsucc); Instruction fsucc = createTargetAt(stream().nextBCI(), frameState); ifNode.setBlockSuccessor(1, fsucc); } private void genIfZero(Condition cond) { Value y = appendConstant(CiConstant.INT_0); Value x = frameState.ipop(); ifNode(x, cond, y); } private void genIfNull(Condition cond) { Value y = appendConstant(CiConstant.NULL_OBJECT); Value x = frameState.apop(); ifNode(x, cond, y); } private void genIfSame(CiKind kind, Condition cond) { Value y = frameState.pop(kind); Value x = frameState.pop(kind); assert !x.isDeleted() && !y.isDeleted(); ifNode(x, cond, y); } private void genThrow(int bci) { Value exception = frameState.apop(); append(new NullCheck(exception, graph)); Instruction entry = handleException(exception, bci); if (entry != null) { append(entry); } else { frameState.clearStack(); frameState.apush(exception); appendGoto(createTarget(unwindBlock(), frameState)); } } private void genCheckCast() { int cpi = stream().readCPI(); RiType type = constantPool.lookupType(cpi, CHECKCAST); boolean isInitialized = type.isResolved(); Value typeInstruction = genTypeOrDeopt(RiType.Representation.ObjectHub, type, isInitialized, cpi); Value object = frameState.apop(); if (typeInstruction != null) { frameState.apush(append(new CheckCast(type, typeInstruction, object, graph))); } else { frameState.apush(appendConstant(CiConstant.NULL_OBJECT)); } } private void genInstanceOf() { int cpi = stream().readCPI(); RiType type = constantPool.lookupType(cpi, INSTANCEOF); boolean isInitialized = type.isResolved(); Value typeInstruction = genTypeOrDeopt(RiType.Representation.ObjectHub, type, isInitialized, cpi); Value object = frameState.apop(); if (typeInstruction != null) { frameState.ipush(append(new InstanceOf(type, typeInstruction, object, graph))); } else { frameState.ipush(appendConstant(CiConstant.INT_0)); } } void genNewInstance(int cpi) { RiType type = constantPool.lookupType(cpi, NEW); if (type.isResolved()) { NewInstance n = new NewInstance(type, cpi, constantPool, graph); frameState.apush(append(n)); } else { append(new Deoptimize(graph)); frameState.apush(appendConstant(CiConstant.NULL_OBJECT)); } } private void genNewTypeArray(int typeCode) { CiKind kind = CiKind.fromArrayTypeCode(typeCode); RiType elementType = runtime.asRiType(kind); NewTypeArray nta = new NewTypeArray(frameState.ipop(), elementType, graph); frameState.apush(append(nta)); } private void genNewObjectArray(int cpi) { RiType type = constantPool.lookupType(cpi, ANEWARRAY); Value length = frameState.ipop(); if (type.isResolved()) { NewArray n = new NewObjectArray(type, length, graph); frameState.apush(append(n)); } else { append(new Deoptimize(graph)); frameState.apush(appendConstant(CiConstant.NULL_OBJECT)); } } private void genNewMultiArray(int cpi) { RiType type = constantPool.lookupType(cpi, MULTIANEWARRAY); int rank = stream().readUByte(bci() + 3); Value[] dims = new Value[rank]; for (int i = rank - 1; i >= 0; i--) { dims[i] = frameState.ipop(); } if (type.isResolved()) { NewArray n = new NewMultiArray(type, dims, cpi, constantPool, graph); frameState.apush(append(n)); } else { append(new Deoptimize(graph)); frameState.apush(appendConstant(CiConstant.NULL_OBJECT)); } } private void genGetField(int cpi, RiField field) { CiKind kind = field.kind(); Value receiver = frameState.apop(); if (field.isResolved()) { LoadField load = new LoadField(receiver, field, graph); appendOptimizedLoadField(kind, load); } else { append(new Deoptimize(graph)); frameState.push(kind.stackKind(), append(Constant.defaultForKind(kind, graph))); } } private void genPutField(int cpi, RiField field) { Value value = frameState.pop(field.kind().stackKind()); Value receiver = frameState.apop(); if (field.isResolved()) { StoreField store = new StoreField(receiver, field, value, graph); appendOptimizedStoreField(store); } else { append(new Deoptimize(graph)); } } private void genGetStatic(int cpi, RiField field) { RiType holder = field.holder(); boolean isInitialized = field.isResolved(); CiConstant constantValue = null; if (isInitialized) { constantValue = field.constantValue(null); } if (constantValue != null) { frameState.push(constantValue.kind.stackKind(), appendConstant(constantValue)); } else { Value container = genTypeOrDeopt(RiType.Representation.StaticFields, holder, isInitialized, cpi); CiKind kind = field.kind(); if (container != null) { LoadField load = new LoadField(container, field, graph); appendOptimizedLoadField(kind, load); } else { append(new Deoptimize(graph)); frameState.push(kind.stackKind(), append(Constant.defaultForKind(kind, graph))); } } } private void genPutStatic(int cpi, RiField field) { RiType holder = field.holder(); Value container = genTypeOrDeopt(RiType.Representation.StaticFields, holder, field.isResolved(), cpi); Value value = frameState.pop(field.kind().stackKind()); if (container != null) { StoreField store = new StoreField(container, field, value, graph); appendOptimizedStoreField(store); } else { append(new Deoptimize(graph)); } } private Value genTypeOrDeopt(RiType.Representation representation, RiType holder, boolean initialized, int cpi) { if (initialized) { return appendConstant(holder.getEncoding(representation)); } else { append(new Deoptimize(graph)); return null; } } private void appendOptimizedStoreField(StoreField store) { append(store); } private void appendOptimizedLoadField(CiKind kind, LoadField load) { // append the load to the instruction Value optimized = append(load); frameState.push(kind.stackKind(), optimized); } private void genInvokeStatic(RiMethod target, int cpi, RiConstantPool constantPool) { RiType holder = target.holder(); boolean isInitialized = target.isResolved() && holder.isInitialized(); if (!isInitialized && C1XOptions.ResolveClassBeforeStaticInvoke) { // Re-use the same resolution code as for accessing a static field. Even though // the result of resolution is not used by the invocation (only the side effect // of initialization is required), it can be commoned with static field accesses. genTypeOrDeopt(RiType.Representation.StaticFields, holder, isInitialized, cpi); } Value[] args = frameState.popArguments(target.signature().argumentSlots(false)); appendInvoke(INVOKESTATIC, target, args, cpi, constantPool); } private void genInvokeInterface(RiMethod target, int cpi, RiConstantPool constantPool) { Value[] args = frameState.popArguments(target.signature().argumentSlots(true)); genInvokeIndirect(INVOKEINTERFACE, target, args, cpi, constantPool); } private void genInvokeVirtual(RiMethod target, int cpi, RiConstantPool constantPool) { Value[] args = frameState.popArguments(target.signature().argumentSlots(true)); genInvokeIndirect(INVOKEVIRTUAL, target, args, cpi, constantPool); } private void genInvokeSpecial(RiMethod target, RiType knownHolder, int cpi, RiConstantPool constantPool) { Value[] args = frameState.popArguments(target.signature().argumentSlots(true)); invokeDirect(target, args, knownHolder, cpi, constantPool); } private void genInvokeIndirect(int opcode, RiMethod target, Value[] args, int cpi, RiConstantPool constantPool) { Value receiver = args[0]; // attempt to devirtualize the call if (target.isResolved()) { RiType klass = target.holder(); // 0. check for trivial cases if (target.canBeStaticallyBound() && !isAbstract(target.accessFlags())) { // check for trivial cases (e.g. final methods, nonvirtual methods) invokeDirect(target, args, target.holder(), cpi, constantPool); return; } // 1. check if the exact type of the receiver can be determined RiType exact = getExactType(klass, receiver); if (exact != null && exact.isResolved()) { // either the holder class is exact, or the receiver object has an exact type invokeDirect(exact.resolveMethodImpl(target), args, exact, cpi, constantPool); return; } } // devirtualization failed, produce an actual invokevirtual appendInvoke(opcode, target, args, cpi, constantPool); } private CiKind returnKind(RiMethod target) { return target.signature().returnKind(); } private void invokeDirect(RiMethod target, Value[] args, RiType knownHolder, int cpi, RiConstantPool constantPool) { appendInvoke(INVOKESPECIAL, target, args, cpi, constantPool); } private void appendInvoke(int opcode, RiMethod target, Value[] args, int cpi, RiConstantPool constantPool) { CiKind resultType = returnKind(target); Invoke invoke = new Invoke(bci(), opcode, resultType.stackKind(), args, target, target.signature().returnType(method.holder()), graph); Value result = appendWithBCI(invoke); invoke.setExceptionEdge(handleException(null, bci())); frameState.pushReturn(resultType, result); } private RiType getExactType(RiType staticType, Value receiver) { RiType exact = staticType.exactType(); if (exact == null) { exact = receiver.exactType(); if (exact == null) { if (receiver.isConstant()) { exact = runtime.getTypeOf(receiver.asConstant()); } if (exact == null) { RiType declared = receiver.declaredType(); exact = declared == null || !declared.isResolved() ? null : declared.exactType(); } } } return exact; } private void callRegisterFinalizer() { Value receiver = frameState.loadLocal(0); RiType declaredType = receiver.declaredType(); RiType receiverType = declaredType; RiType exactType = receiver.exactType(); if (exactType == null && declaredType != null) { exactType = declaredType.exactType(); } if (exactType == null && receiver instanceof Local && ((Local) receiver).index() == 0) { // the exact type isn't known, but the receiver is parameter 0 => use holder receiverType = method.holder(); exactType = receiverType.exactType(); } boolean needsCheck = true; if (exactType != null) { // we have an exact type needsCheck = exactType.hasFinalizer(); } else { // if either the declared type of receiver or the holder can be assumed to have no finalizers if (declaredType != null && !declaredType.hasFinalizableSubclass()) { if (compilation.recordNoFinalizableSubclassAssumption(declaredType)) { needsCheck = false; } } if (receiverType != null && !receiverType.hasFinalizableSubclass()) { if (compilation.recordNoFinalizableSubclassAssumption(receiverType)) { needsCheck = false; } } } if (needsCheck) { // append a call to the finalizer registration append(new RegisterFinalizer(frameState.loadLocal(0), frameState.create(bci()), graph)); C1XMetrics.InlinedFinalizerChecks++; } } private void genReturn(Value x) { frameState.clearStack(); if (x != null) { frameState.push(x.kind, x); } appendGoto(createTarget(returnBlock(), frameState)); } private void genMonitorEnter(Value x, int bci) { int lockNumber = frameState.locksSize(); MonitorAddress lockAddress = null; if (runtime.sizeOfBasicObjectLock() != 0) { lockAddress = new MonitorAddress(lockNumber, graph); append(lockAddress); } MonitorEnter monitorEnter = new MonitorEnter(x, lockAddress, lockNumber, graph); appendWithBCI(monitorEnter); frameState.lock(x); if (bci == Instruction.SYNCHRONIZATION_ENTRY_BCI) { monitorEnter.setStateAfter(frameState.create(0)); } } private void genMonitorExit(Value x) { int lockNumber = frameState.locksSize() - 1; if (lockNumber < 0) { throw new CiBailout("monitor stack underflow"); } MonitorAddress lockAddress = null; if (runtime.sizeOfBasicObjectLock() != 0) { lockAddress = new MonitorAddress(lockNumber, graph); append(lockAddress); } appendWithBCI(new MonitorExit(x, lockAddress, lockNumber, graph)); frameState.unlock(); } private void genJsr(int dest) { throw new CiBailout("jsr/ret not supported"); } private void genRet(int localIndex) { throw new CiBailout("jsr/ret not supported"); } private void genTableswitch() { int bci = bci(); Value value = frameState.ipop(); BytecodeTableSwitch ts = new BytecodeTableSwitch(stream(), bci); int max = ts.numberOfCases(); List<Instruction> list = new ArrayList<Instruction>(max + 1); List<Integer> offsetList = new ArrayList<Integer>(max + 1); for (int i = 0; i < max; i++) { // add all successors to the successor list int offset = ts.offsetAt(i); list.add(null); offsetList.add(offset); } int offset = ts.defaultOffset(); list.add(null); offsetList.add(offset); TableSwitch tableSwitch = new TableSwitch(value, list, ts.lowKey(), graph); for (int i = 0; i < offsetList.size(); ++i) { tableSwitch.setBlockSuccessor(i, createTargetAt(bci + offsetList.get(i), frameState)); } append(tableSwitch); } private void genLookupswitch() { int bci = bci(); Value value = frameState.ipop(); BytecodeLookupSwitch ls = new BytecodeLookupSwitch(stream(), bci); int max = ls.numberOfCases(); List<Instruction> list = new ArrayList<Instruction>(max + 1); List<Integer> offsetList = new ArrayList<Integer>(max + 1); int[] keys = new int[max]; for (int i = 0; i < max; i++) { // add all successors to the successor list int offset = ls.offsetAt(i); list.add(null); offsetList.add(offset); keys[i] = ls.keyAt(i); } int offset = ls.defaultOffset(); list.add(null); offsetList.add(offset); LookupSwitch lookupSwitch = new LookupSwitch(value, list, keys, graph); for (int i = 0; i < offsetList.size(); ++i) { lookupSwitch.setBlockSuccessor(i, createTargetAt(bci + offsetList.get(i), frameState)); } append(lookupSwitch); } private Value appendConstant(CiConstant constant) { return append(new Constant(constant, graph)); } private Value append(Instruction x) { return appendWithBCI(x); } private Value append(Value v) { return v; } private Value appendWithBCI(Instruction x) { assert x.predecessors().size() == 0 : "instruction should not have been appended yet"; assert lastInstr.next() == null : "cannot append instruction to instruction which isn't end (" + lastInstr + "->" + lastInstr.next() + ")"; lastInstr.setNext(x); lastInstr = x; if (++stats.nodeCount >= C1XOptions.MaximumInstructionCount) { // bailout if we've exceeded the maximum inlining size throw new CiBailout("Method and/or inlining is too large"); } return x; } private Instruction createTargetAt(int bci, FrameStateAccess stateAfter) { return createTarget(blockFromBci[bci], stateAfter); } private Instruction createTarget(Block block, FrameStateAccess stateAfter) { assert block != null && stateAfter != null; assert block.isLoopHeader || block.firstInstruction == null || block.firstInstruction.next() == null : "non-loop block must be iterated after all its predecessors"; if (block.isExceptionEntry) { assert stateAfter.stackSize() == 1; } if (block.firstInstruction == null) { if (block.isLoopHeader) { // block.firstInstruction = new Merge(block.startBci, graph); LoopBegin loopBegin = new LoopBegin(graph); LoopEnd loopEnd = new LoopEnd(graph); loopEnd.setLoopBegin(loopBegin); block.firstInstruction = loopBegin; } else { block.firstInstruction = new Placeholder(graph); } } mergeOrClone(block, stateAfter); addToWorkList(block); if (block.firstInstruction instanceof LoopBegin && isVisited(block)) { return ((LoopBegin) block.firstInstruction).loopEnd(); } else { return block.firstInstruction; } } private Value synchronizedObject(FrameStateAccess state, RiMethod target) { if (isStatic(target.accessFlags())) { Constant classConstant = new Constant(target.holder().getEncoding(Representation.JavaClass), graph); return append(classConstant); } else { return state.localAt(0); } } private void iterateAllBlocks() { Block block; while ((block = removeFromWorkList()) != null) { // remove blocks that have no predecessors by the time it their bytecodes are parsed if (block.firstInstruction == null) { markVisited(block); continue; } if (!isVisited(block)) { markVisited(block); // now parse the block frameState.initializeFrom(((StateSplit) block.firstInstruction).stateBefore()); lastInstr = block.firstInstruction; assert block.firstInstruction.next() == null : "instructions already appended at block " + block.blockID; if (block == returnBlock) { createReturnBlock(block); } else if (block == unwindBlock) { createUnwindBlock(block); } else if (block instanceof ExceptionBlock) { createExceptionDispatch((ExceptionBlock) block); } else { iterateBytecodesForBlock(block); } } } for (Block b : blocksVisited) { if (b.isLoopHeader) { LoopBegin begin = (LoopBegin) b.firstInstruction; LoopEnd end = begin.loopEnd(); // This can happen with degenerated loops like this one: // for (;;) { // try { // break; // } catch (UnresolvedException iioe) { // } // } if (end.stateBefore() != null) { begin.stateBefore().merge(begin, end.stateBefore()); } else { end.delete(); Merge merge = new Merge(graph); merge.successors().setAndClear(merge.nextIndex(), begin, begin.nextIndex()); begin.replace(merge); } } } } private void createUnwindBlock(Block block) { if (Modifier.isSynchronized(method.accessFlags())) { genMonitorExit(methodSynchronizedObject); } append(graph.createUnwind(frameState.apop())); } private void createReturnBlock(Block block) { if (method.isConstructor() && method.holder().superType() == null) { callRegisterFinalizer(); } CiKind returnKind = method.signature().returnKind().stackKind(); Value x = returnKind == CiKind.Void ? null : frameState.pop(returnKind); assert frameState.stackSize() == 0; if (Modifier.isSynchronized(method.accessFlags())) { genMonitorExit(methodSynchronizedObject); } append(graph.createReturn(x)); } private void createExceptionDispatch(ExceptionBlock block) { if (block.handler == null) { assert frameState.stackSize() == 1 : "only exception object expected on stack, actual size: " + frameState.stackSize(); createUnwindBlock(block); } else { assert frameState.stackSize() == 1; Block nextBlock = block.next == null ? unwindBlock() : block.next; if (block.handler.catchType().isResolved()) { Instruction catchSuccessor = createTarget(blockFromBci[block.handler.handlerBCI()], frameState); Instruction nextDispatch = createTarget(nextBlock, frameState); append(new ExceptionDispatch(frameState.stackAt(0), catchSuccessor, nextDispatch, block.handler.catchType(), graph)); } else { Deoptimize deopt = new Deoptimize(graph); deopt.setMessage("unresolved " + block.handler.catchType().name()); append(deopt); Instruction nextDispatch = createTarget(nextBlock, frameState); appendGoto(nextDispatch); } } } private void appendGoto(Instruction target) { lastInstr.setNext(target); } private void iterateBytecodesForBlock(Block block) { assert frameState != null; stream.setBCI(block.startBci); int endBCI = stream.endBCI(); boolean blockStart = true; int bci = block.startBci; while (bci < endBCI) { Block nextBlock = blockFromBci[bci]; if (nextBlock != null && nextBlock != block) { assert !nextBlock.isExceptionEntry; // we fell through to the next block, add a goto and break appendGoto(createTarget(nextBlock, frameState)); break; } // read the opcode int opcode = stream.currentBC(); traceState(); traceInstruction(bci, opcode, blockStart); processBytecode(bci, opcode); if (Schedule.isBlockEnd(lastInstr) || lastInstr.next() != null) { break; } stream.next(); bci = stream.currentBCI(); if (lastInstr instanceof StateSplit) { StateSplit stateSplit = (StateSplit) lastInstr; if (stateSplit.stateAfter() == null && stateSplit.needsStateAfter()) { stateSplit.setStateAfter(frameState.create(bci)); } } blockStart = false; } } private void traceState() { if (C1XOptions.TraceBytecodeParserLevel >= TRACELEVEL_STATE && !TTY.isSuppressed()) { log.println(String.format("| state [nr locals = %d, stack depth = %d, method = %s]", frameState.localsSize(), frameState.stackSize(), method)); for (int i = 0; i < frameState.localsSize(); ++i) { Value value = frameState.localAt(i); log.println(String.format("| local[%d] = %-8s : %s", i, value == null ? "bogus" : value.kind.javaName, value)); } for (int i = 0; i < frameState.stackSize(); ++i) { Value value = frameState.stackAt(i); log.println(String.format("| stack[%d] = %-8s : %s", i, value == null ? "bogus" : value.kind.javaName, value)); } for (int i = 0; i < frameState.locksSize(); ++i) { Value value = frameState.lockAt(i); log.println(String.format("| lock[%d] = %-8s : %s", i, value == null ? "bogus" : value.kind.javaName, value)); } } } private void processBytecode(int bci, int opcode) { int cpi; // Checkstyle: stop switch (opcode) { case NOP : /* nothing to do */ break; case ACONST_NULL : frameState.apush(appendConstant(CiConstant.NULL_OBJECT)); break; case ICONST_M1 : frameState.ipush(appendConstant(CiConstant.INT_MINUS_1)); break; case ICONST_0 : frameState.ipush(appendConstant(CiConstant.INT_0)); break; case ICONST_1 : frameState.ipush(appendConstant(CiConstant.INT_1)); break; case ICONST_2 : frameState.ipush(appendConstant(CiConstant.INT_2)); break; case ICONST_3 : frameState.ipush(appendConstant(CiConstant.INT_3)); break; case ICONST_4 : frameState.ipush(appendConstant(CiConstant.INT_4)); break; case ICONST_5 : frameState.ipush(appendConstant(CiConstant.INT_5)); break; case LCONST_0 : frameState.lpush(appendConstant(CiConstant.LONG_0)); break; case LCONST_1 : frameState.lpush(appendConstant(CiConstant.LONG_1)); break; case FCONST_0 : frameState.fpush(appendConstant(CiConstant.FLOAT_0)); break; case FCONST_1 : frameState.fpush(appendConstant(CiConstant.FLOAT_1)); break; case FCONST_2 : frameState.fpush(appendConstant(CiConstant.FLOAT_2)); break; case DCONST_0 : frameState.dpush(appendConstant(CiConstant.DOUBLE_0)); break; case DCONST_1 : frameState.dpush(appendConstant(CiConstant.DOUBLE_1)); break; case BIPUSH : frameState.ipush(appendConstant(CiConstant.forInt(stream.readByte()))); break; case SIPUSH : frameState.ipush(appendConstant(CiConstant.forInt(stream.readShort()))); break; case LDC : // fall through case LDC_W : // fall through case LDC2_W : genLoadConstant(stream.readCPI()); break; case ILOAD : loadLocal(stream.readLocalIndex(), CiKind.Int); break; case LLOAD : loadLocal(stream.readLocalIndex(), CiKind.Long); break; case FLOAD : loadLocal(stream.readLocalIndex(), CiKind.Float); break; case DLOAD : loadLocal(stream.readLocalIndex(), CiKind.Double); break; case ALOAD : loadLocal(stream.readLocalIndex(), CiKind.Object); break; case ILOAD_0 : // fall through case ILOAD_1 : // fall through case ILOAD_2 : // fall through case ILOAD_3 : loadLocal(opcode - ILOAD_0, CiKind.Int); break; case LLOAD_0 : // fall through case LLOAD_1 : // fall through case LLOAD_2 : // fall through case LLOAD_3 : loadLocal(opcode - LLOAD_0, CiKind.Long); break; case FLOAD_0 : // fall through case FLOAD_1 : // fall through case FLOAD_2 : // fall through case FLOAD_3 : loadLocal(opcode - FLOAD_0, CiKind.Float); break; case DLOAD_0 : // fall through case DLOAD_1 : // fall through case DLOAD_2 : // fall through case DLOAD_3 : loadLocal(opcode - DLOAD_0, CiKind.Double); break; case ALOAD_0 : // fall through case ALOAD_1 : // fall through case ALOAD_2 : // fall through case ALOAD_3 : loadLocal(opcode - ALOAD_0, CiKind.Object); break; case IALOAD : genLoadIndexed(CiKind.Int ); break; case LALOAD : genLoadIndexed(CiKind.Long ); break; case FALOAD : genLoadIndexed(CiKind.Float ); break; case DALOAD : genLoadIndexed(CiKind.Double); break; case AALOAD : genLoadIndexed(CiKind.Object); break; case BALOAD : genLoadIndexed(CiKind.Byte ); break; case CALOAD : genLoadIndexed(CiKind.Char ); break; case SALOAD : genLoadIndexed(CiKind.Short ); break; case ISTORE : storeLocal(CiKind.Int, stream.readLocalIndex()); break; case LSTORE : storeLocal(CiKind.Long, stream.readLocalIndex()); break; case FSTORE : storeLocal(CiKind.Float, stream.readLocalIndex()); break; case DSTORE : storeLocal(CiKind.Double, stream.readLocalIndex()); break; case ASTORE : storeLocal(CiKind.Object, stream.readLocalIndex()); break; case ISTORE_0 : // fall through case ISTORE_1 : // fall through case ISTORE_2 : // fall through case ISTORE_3 : storeLocal(CiKind.Int, opcode - ISTORE_0); break; case LSTORE_0 : // fall through case LSTORE_1 : // fall through case LSTORE_2 : // fall through case LSTORE_3 : storeLocal(CiKind.Long, opcode - LSTORE_0); break; case FSTORE_0 : // fall through case FSTORE_1 : // fall through case FSTORE_2 : // fall through case FSTORE_3 : storeLocal(CiKind.Float, opcode - FSTORE_0); break; case DSTORE_0 : // fall through case DSTORE_1 : // fall through case DSTORE_2 : // fall through case DSTORE_3 : storeLocal(CiKind.Double, opcode - DSTORE_0); break; case ASTORE_0 : // fall through case ASTORE_1 : // fall through case ASTORE_2 : // fall through case ASTORE_3 : storeLocal(CiKind.Object, opcode - ASTORE_0); break; case IASTORE : genStoreIndexed(CiKind.Int ); break; case LASTORE : genStoreIndexed(CiKind.Long ); break; case FASTORE : genStoreIndexed(CiKind.Float ); break; case DASTORE : genStoreIndexed(CiKind.Double); break; case AASTORE : genStoreIndexed(CiKind.Object); break; case BASTORE : genStoreIndexed(CiKind.Byte ); break; case CASTORE : genStoreIndexed(CiKind.Char ); break; case SASTORE : genStoreIndexed(CiKind.Short ); break; case POP : // fall through case POP2 : // fall through case DUP : // fall through case DUP_X1 : // fall through case DUP_X2 : // fall through case DUP2 : // fall through case DUP2_X1 : // fall through case DUP2_X2 : // fall through case SWAP : stackOp(opcode); break; case IADD : // fall through case ISUB : // fall through case IMUL : genArithmeticOp(CiKind.Int, opcode); break; case IDIV : // fall through case IREM : genArithmeticOp(CiKind.Int, opcode, true); break; case LADD : // fall through case LSUB : // fall through case LMUL : genArithmeticOp(CiKind.Long, opcode); break; case LDIV : // fall through case LREM : genArithmeticOp(CiKind.Long, opcode, true); break; case FADD : // fall through case FSUB : // fall through case FMUL : // fall through case FDIV : // fall through case FREM : genArithmeticOp(CiKind.Float, opcode); break; case DADD : // fall through case DSUB : // fall through case DMUL : // fall through case DDIV : // fall through case DREM : genArithmeticOp(CiKind.Double, opcode); break; case INEG : genNegateOp(CiKind.Int); break; case LNEG : genNegateOp(CiKind.Long); break; case FNEG : genNegateOp(CiKind.Float); break; case DNEG : genNegateOp(CiKind.Double); break; case ISHL : // fall through case ISHR : // fall through case IUSHR : genShiftOp(CiKind.Int, opcode); break; case IAND : // fall through case IOR : // fall through case IXOR : genLogicOp(CiKind.Int, opcode); break; case LSHL : // fall through case LSHR : // fall through case LUSHR : genShiftOp(CiKind.Long, opcode); break; case LAND : // fall through case LOR : // fall through case LXOR : genLogicOp(CiKind.Long, opcode); break; case IINC : genIncrement(); break; case I2L : genConvert(opcode, CiKind.Int , CiKind.Long ); break; case I2F : genConvert(opcode, CiKind.Int , CiKind.Float ); break; case I2D : genConvert(opcode, CiKind.Int , CiKind.Double); break; case L2I : genConvert(opcode, CiKind.Long , CiKind.Int ); break; case L2F : genConvert(opcode, CiKind.Long , CiKind.Float ); break; case L2D : genConvert(opcode, CiKind.Long , CiKind.Double); break; case F2I : genConvert(opcode, CiKind.Float , CiKind.Int ); break; case F2L : genConvert(opcode, CiKind.Float , CiKind.Long ); break; case F2D : genConvert(opcode, CiKind.Float , CiKind.Double); break; case D2I : genConvert(opcode, CiKind.Double, CiKind.Int ); break; case D2L : genConvert(opcode, CiKind.Double, CiKind.Long ); break; case D2F : genConvert(opcode, CiKind.Double, CiKind.Float ); break; case I2B : genConvert(opcode, CiKind.Int , CiKind.Byte ); break; case I2C : genConvert(opcode, CiKind.Int , CiKind.Char ); break; case I2S : genConvert(opcode, CiKind.Int , CiKind.Short ); break; case LCMP : genCompareOp(CiKind.Long, opcode, CiKind.Int); break; case FCMPL : genCompareOp(CiKind.Float, opcode, CiKind.Int); break; case FCMPG : genCompareOp(CiKind.Float, opcode, CiKind.Int); break; case DCMPL : genCompareOp(CiKind.Double, opcode, CiKind.Int); break; case DCMPG : genCompareOp(CiKind.Double, opcode, CiKind.Int); break; case IFEQ : genIfZero(Condition.EQ); break; case IFNE : genIfZero(Condition.NE); break; case IFLT : genIfZero(Condition.LT); break; case IFGE : genIfZero(Condition.GE); break; case IFGT : genIfZero(Condition.GT); break; case IFLE : genIfZero(Condition.LE); break; case IF_ICMPEQ : genIfSame(CiKind.Int, Condition.EQ); break; case IF_ICMPNE : genIfSame(CiKind.Int, Condition.NE); break; case IF_ICMPLT : genIfSame(CiKind.Int, Condition.LT); break; case IF_ICMPGE : genIfSame(CiKind.Int, Condition.GE); break; case IF_ICMPGT : genIfSame(CiKind.Int, Condition.GT); break; case IF_ICMPLE : genIfSame(CiKind.Int, Condition.LE); break; case IF_ACMPEQ : genIfSame(frameState.peekKind(), Condition.EQ); break; case IF_ACMPNE : genIfSame(frameState.peekKind(), Condition.NE); break; case GOTO : genGoto(stream.currentBCI(), stream.readBranchDest()); break; case JSR : genJsr(stream.readBranchDest()); break; case RET : genRet(stream.readLocalIndex()); break; case TABLESWITCH : genTableswitch(); break; case LOOKUPSWITCH : genLookupswitch(); break; case IRETURN : genReturn(frameState.ipop()); break; case LRETURN : genReturn(frameState.lpop()); break; case FRETURN : genReturn(frameState.fpop()); break; case DRETURN : genReturn(frameState.dpop()); break; case ARETURN : genReturn(frameState.apop()); break; case RETURN : genReturn(null ); break; case GETSTATIC : cpi = stream.readCPI(); genGetStatic(cpi, constantPool.lookupField(cpi, opcode)); break; case PUTSTATIC : cpi = stream.readCPI(); genPutStatic(cpi, constantPool.lookupField(cpi, opcode)); break; case GETFIELD : cpi = stream.readCPI(); genGetField(cpi, constantPool.lookupField(cpi, opcode)); break; case PUTFIELD : cpi = stream.readCPI(); genPutField(cpi, constantPool.lookupField(cpi, opcode)); break; case INVOKEVIRTUAL : cpi = stream.readCPI(); genInvokeVirtual(constantPool.lookupMethod(cpi, opcode), cpi, constantPool); break; case INVOKESPECIAL : cpi = stream.readCPI(); genInvokeSpecial(constantPool.lookupMethod(cpi, opcode), null, cpi, constantPool); break; case INVOKESTATIC : cpi = stream.readCPI(); genInvokeStatic(constantPool.lookupMethod(cpi, opcode), cpi, constantPool); break; case INVOKEINTERFACE: cpi = stream.readCPI(); genInvokeInterface(constantPool.lookupMethod(cpi, opcode), cpi, constantPool); break; case NEW : genNewInstance(stream.readCPI()); break; case NEWARRAY : genNewTypeArray(stream.readLocalIndex()); break; case ANEWARRAY : genNewObjectArray(stream.readCPI()); break; case ARRAYLENGTH : genArrayLength(); break; case ATHROW : genThrow(stream.currentBCI()); break; case CHECKCAST : genCheckCast(); break; case INSTANCEOF : genInstanceOf(); break; case MONITORENTER : genMonitorEnter(frameState.apop(), stream.currentBCI()); break; case MONITOREXIT : genMonitorExit(frameState.apop()); break; case MULTIANEWARRAY : genNewMultiArray(stream.readCPI()); break; case IFNULL : genIfNull(Condition.EQ); break; case IFNONNULL : genIfNull(Condition.NE); break; case GOTO_W : genGoto(stream.currentBCI(), stream.readFarBranchDest()); break; case JSR_W : genJsr(stream.readFarBranchDest()); break; case BREAKPOINT: throw new CiBailout("concurrent setting of breakpoint"); default: throw new CiBailout("Unsupported opcode " + opcode + " (" + nameOf(opcode) + ") [bci=" + bci + "]"); } // Checkstyle: resume } private void traceInstruction(int bci, int opcode, boolean blockStart) { if (C1XOptions.TraceBytecodeParserLevel >= TRACELEVEL_INSTRUCTIONS && !TTY.isSuppressed()) { StringBuilder sb = new StringBuilder(40); sb.append(blockStart ? '+' : '|'); if (bci < 10) { sb.append(" "); } else if (bci < 100) { sb.append(' '); } sb.append(bci).append(": ").append(Bytecodes.nameOf(opcode)); for (int i = bci + 1; i < stream.nextBCI(); ++i) { sb.append(' ').append(stream.readUByte(i)); } log.println(sb.toString()); } } private void genArrayLength() { frameState.ipush(append(new ArrayLength(frameState.apop(), graph))); } /** * Adds a block to the worklist, if it is not already in the worklist. * This method will keep the worklist topologically stored (i.e. the lower * DFNs are earlier in the list). * @param block the block to add to the work list */ private void addToWorkList(Block block) { if (!isOnWorkList(block)) { markOnWorkList(block); sortIntoWorkList(block); } } private void sortIntoWorkList(Block top) { workList.offer(top); } /** * Removes the next block from the worklist. The list is sorted topologically, so the * block with the lowest depth first number in the list will be removed and returned. * @return the next block from the worklist; {@code null} if there are no blocks * in the worklist */ private Block removeFromWorkList() { return workList.poll(); } }