public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute) {
// Set up the code attribute editor.
codeAttributeEditor.reset(codeAttribute.u4codeLength);
// Find the peephole changes.
codeAttribute.instructionsAccept(clazz, method, instructionSequenceReplacer);
// Apply the peephole changes.
codeAttributeEditor.visitCodeAttribute(clazz, method, codeAttribute);
}
/** Appends the specified subroutine. */
private void inlineSubroutine(
Clazz clazz,
Method method,
CodeAttribute codeAttribute,
int subroutineInvocationOffset,
int subroutineStart) {
int subroutineEnd = branchTargetFinder.subroutineEnd(subroutineStart);
if (DEBUG) {
System.out.println(
" Inlining subroutine ["
+ subroutineStart
+ " -> "
+ subroutineEnd
+ "] at ["
+ subroutineInvocationOffset
+ "]");
}
// Don't go inlining exceptions that are already applicable to this
// subroutine invocation.
ExceptionInfoVisitor oldSubroutineExceptionInliner = subroutineExceptionInliner;
int oldClipStart = clipStart;
int oldClipEnd = clipEnd;
subroutineExceptionInliner =
new ExceptionExcludedOffsetFilter(subroutineInvocationOffset, subroutineExceptionInliner);
clipStart = subroutineStart;
clipEnd = subroutineEnd;
codeAttributeComposer.beginCodeFragment(codeAttribute.u4codeLength);
// Copy the subroutine instructions, inlining any subroutine calls
// recursively.
codeAttribute.instructionsAccept(clazz, method, subroutineStart, subroutineEnd, this);
if (DEBUG) {
System.out.println(" Appending label after inlined subroutine at [" + subroutineEnd + "]");
}
// Append a label just after the code.
codeAttributeComposer.appendLabel(subroutineEnd);
// Inline the subroutine exceptions.
codeAttribute.exceptionsAccept(
clazz, method, subroutineStart, subroutineEnd, subroutineExceptionInliner);
// We can again inline exceptions that are applicable to this
// subroutine invocation.
subroutineExceptionInliner = oldSubroutineExceptionInliner;
clipStart = oldClipStart;
clipEnd = oldClipEnd;
codeAttributeComposer.endCodeFragment();
}
public void visitCodeAttribute(Clazz clazz, Method method, CodeAttribute codeAttribute) {
markAsUsed(codeAttribute);
markConstant(clazz, codeAttribute.u2attributeNameIndex);
// Mark the constant pool entries referenced by the instructions,
// by the exceptions, and by the attributes.
codeAttribute.instructionsAccept(clazz, method, this);
codeAttribute.exceptionsAccept(clazz, method, this);
codeAttribute.attributesAccept(clazz, method, this);
}