@NotNull
public static List<AbstractInsnNode> getCapturedFieldAccessChain(@NotNull VarInsnNode aload0) {
List<AbstractInsnNode> fieldAccessChain = new ArrayList<AbstractInsnNode>();
fieldAccessChain.add(aload0);
AbstractInsnNode next = aload0.getNext();
while (next != null && next instanceof FieldInsnNode || next instanceof LabelNode) {
if (next instanceof LabelNode) {
next = next.getNext();
continue; // it will be delete on transformation
}
fieldAccessChain.add(next);
if ("this$0".equals(((FieldInsnNode) next).name)) {
next = next.getNext();
} else {
break;
}
}
return fieldAccessChain;
}
@NotNull
// process local and global returns (local substituted with goto end-label global kept unchanged)
public static List<PointForExternalFinallyBlocks> processReturns(
@NotNull MethodNode node,
@NotNull LabelOwner labelOwner,
boolean remapReturn,
Label endLabel) {
if (!remapReturn) {
return Collections.emptyList();
}
List<PointForExternalFinallyBlocks> result = new ArrayList<PointForExternalFinallyBlocks>();
InsnList instructions = node.instructions;
AbstractInsnNode insnNode = instructions.getFirst();
while (insnNode != null) {
if (InlineCodegenUtil.isReturnOpcode(insnNode.getOpcode())) {
AbstractInsnNode previous = insnNode.getPrevious();
MethodInsnNode flagNode;
boolean isLocalReturn = true;
String labelName = null;
if (previous != null
&& previous instanceof MethodInsnNode
&& InlineCodegenUtil.NON_LOCAL_RETURN.equals(((MethodInsnNode) previous).owner)) {
flagNode = (MethodInsnNode) previous;
labelName = flagNode.name;
}
if (labelName != null) {
isLocalReturn = labelOwner.isMyLabel(labelName);
// remove global return flag
if (isLocalReturn) {
instructions.remove(previous);
}
}
if (isLocalReturn && endLabel != null) {
LabelNode labelNode = (LabelNode) endLabel.info;
JumpInsnNode jumpInsnNode = new JumpInsnNode(Opcodes.GOTO, labelNode);
instructions.insert(insnNode, jumpInsnNode);
instructions.remove(insnNode);
insnNode = jumpInsnNode;
}
// genetate finally block before nonLocalReturn flag/return/goto
result.add(
new PointForExternalFinallyBlocks(
isLocalReturn ? insnNode : insnNode.getPrevious(),
getReturnType(insnNode.getOpcode())));
}
insnNode = insnNode.getNext();
}
return result;
}
@NotNull
protected MethodNode markPlacesForInlineAndRemoveInlinable(@NotNull MethodNode node) {
node = prepareNode(node);
Analyzer<SourceValue> analyzer =
new Analyzer<SourceValue>(new SourceInterpreter()) {
@NotNull
@Override
protected Frame<SourceValue> newFrame(int nLocals, int nStack) {
return new Frame<SourceValue>(nLocals, nStack) {
@Override
public void execute(
@NotNull AbstractInsnNode insn, Interpreter<SourceValue> interpreter)
throws AnalyzerException {
if (insn.getOpcode() == Opcodes.RETURN) {
// there is exception on void non local return in frame
return;
}
super.execute(insn, interpreter);
}
};
}
};
Frame<SourceValue>[] sources;
try {
sources = analyzer.analyze("fake", node);
} catch (AnalyzerException e) {
throw wrapException(e, node, "couldn't inline method call");
}
AbstractInsnNode cur = node.instructions.getFirst();
int index = 0;
boolean awaitClassReification = false;
Set<LabelNode> possibleDeadLabels = new HashSet<LabelNode>();
while (cur != null) {
Frame<SourceValue> frame = sources[index];
if (frame != null) {
if (ReifiedTypeInliner.isNeedClassReificationMarker(cur)) {
awaitClassReification = true;
} else if (cur.getType() == AbstractInsnNode.METHOD_INSN) {
MethodInsnNode methodInsnNode = (MethodInsnNode) cur;
String owner = methodInsnNode.owner;
String desc = methodInsnNode.desc;
String name = methodInsnNode.name;
// TODO check closure
int paramLength = Type.getArgumentTypes(desc).length + 1; // non static
if (isInvokeOnLambda(owner, name) /*&& methodInsnNode.owner.equals(INLINE_RUNTIME)*/) {
SourceValue sourceValue = frame.getStack(frame.getStackSize() - paramLength);
LambdaInfo lambdaInfo = null;
int varIndex = -1;
if (sourceValue.insns.size() == 1) {
AbstractInsnNode insnNode = sourceValue.insns.iterator().next();
lambdaInfo = getLambdaIfExists(insnNode);
if (lambdaInfo != null) {
// remove inlinable access
node.instructions.remove(insnNode);
}
}
invokeCalls.add(new InvokeCall(varIndex, lambdaInfo));
} else if (isAnonymousConstructorCall(owner, name)) {
Map<Integer, LambdaInfo> lambdaMapping = new HashMap<Integer, LambdaInfo>();
int paramStart = frame.getStackSize() - paramLength;
for (int i = 0; i < paramLength; i++) {
SourceValue sourceValue = frame.getStack(paramStart + i);
if (sourceValue.insns.size() == 1) {
AbstractInsnNode insnNode = sourceValue.insns.iterator().next();
LambdaInfo lambdaInfo = getLambdaIfExists(insnNode);
if (lambdaInfo != null) {
lambdaMapping.put(i, lambdaInfo);
node.instructions.remove(insnNode);
}
}
}
anonymousObjectGenerations.add(
buildConstructorInvocation(owner, desc, lambdaMapping, awaitClassReification));
awaitClassReification = false;
}
} else if (cur.getOpcode() == Opcodes.GETSTATIC) {
FieldInsnNode fieldInsnNode = (FieldInsnNode) cur;
String owner = fieldInsnNode.owner;
if (isAnonymousSingletonLoad(owner, fieldInsnNode.name)) {
anonymousObjectGenerations.add(
new AnonymousObjectGeneration(
owner, isSameModule, awaitClassReification, isAlreadyRegenerated(owner), true));
awaitClassReification = false;
}
}
}
AbstractInsnNode prevNode = cur;
cur = cur.getNext();
index++;
// given frame is <tt>null</tt> if and only if the corresponding instruction cannot be reached
// (dead code).
if (frame == null) {
// clean dead code otherwise there is problems in unreachable finally block, don't touch
// label it cause try/catch/finally problems
if (prevNode.getType() == AbstractInsnNode.LABEL) {
// NB: Cause we generate exception table for default handler using gaps (see
// ExpressionCodegen.visitTryExpression)
// it may occurs that interval for default handler starts before catch start label, so
// this label seems as dead,
// but as result all this labels will be merged into one (see KT-5863)
} else {
node.instructions.remove(prevNode);
}
}
}
// clean dead try/catch blocks
List<TryCatchBlockNode> blocks = node.tryCatchBlocks;
for (Iterator<TryCatchBlockNode> iterator = blocks.iterator(); iterator.hasNext(); ) {
TryCatchBlockNode block = iterator.next();
if (isEmptyTryInterval(block)) {
iterator.remove();
}
}
return node;
}