private void findNext() {
while (next == null) {
// Make sure we have an instruction iterator
if (instructionIter == null) {
if (!blockIter.hasNext()) {
return; // At end
}
curBlock = blockIter.next();
instructionIter = curBlock.instructionIterator();
}
if (instructionIter.hasNext()) {
next = new Location(instructionIter.next(), curBlock);
} else {
instructionIter = null; // Go to next block
}
}
}
public void checkIntegrity() {
// Ensure that basic blocks have only consecutive instructions
for (Iterator<BasicBlock> i = blockIterator(); i.hasNext(); ) {
BasicBlock basicBlock = i.next();
InstructionHandle prev = null;
for (Iterator<InstructionHandle> j = basicBlock.instructionIterator(); j.hasNext(); ) {
InstructionHandle handle = j.next();
if (prev != null && prev.getNext() != handle) {
throw new IllegalStateException(
"Non-consecutive instructions in block "
+ basicBlock.getLabel()
+ ": prev="
+ prev
+ ", handle="
+ handle);
}
prev = handle;
}
}
}