public static void insertNodeBefore(
@NotNull MethodNode from, @NotNull MethodNode to, @NotNull AbstractInsnNode beforeNode) {
InsnList instructions = to.instructions;
ListIterator<AbstractInsnNode> iterator = from.instructions.iterator();
while (iterator.hasNext()) {
AbstractInsnNode next = iterator.next();
instructions.insertBefore(beforeNode, next);
}
}
@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;
}
public InlineResult doInline(
@NotNull MethodVisitor adapter,
@NotNull LocalVarRemapper remapper,
boolean remapReturn,
@NotNull LabelOwner labelOwner) {
// analyze body
MethodNode transformedNode = markPlacesForInlineAndRemoveInlinable(node);
// substitute returns with "goto end" instruction to keep non local returns in lambdas
Label end = new Label();
transformedNode = doInline(transformedNode);
removeClosureAssertions(transformedNode);
InsnList instructions = transformedNode.instructions;
instructions.resetLabels();
MethodNode resultNode =
new MethodNode(
InlineCodegenUtil.API,
transformedNode.access,
transformedNode.name,
transformedNode.desc,
transformedNode.signature,
ArrayUtil.toStringArray(transformedNode.exceptions));
RemapVisitor visitor = new RemapVisitor(resultNode, remapper, nodeRemapper);
try {
transformedNode.accept(visitor);
} catch (Exception e) {
throw wrapException(e, transformedNode, "couldn't inline method call");
}
resultNode.visitLabel(end);
if (inliningContext.isRoot()) {
InternalFinallyBlockInliner.processInlineFunFinallyBlocks(resultNode, lambdasFinallyBlocks);
}
processReturns(resultNode, labelOwner, remapReturn, end);
// flush transformed node to output
resultNode.accept(new InliningInstructionAdapter(adapter));
return result;
}
