derefOffsetMap.clear(); for (Map.Entry<ValueNumber, BitSet> entry : derefOffsetMap.entrySet()) {
derefLocationSetMap.clear(); for (Map.Entry<ValueNumber, BitSet> entry : derefLocationSetMap.entrySet()) {
	public void makeSameAs(UnconditionalValueDerefSet source) {		// Copy value numbers		valueNumberSet.clear();		valueNumberSet.or(source.valueNumberSet);		// Copy dereference locations for each value number		derefOffsetMap.clear();		for (Map.Entry<ValueNumber, BitSet> entry : derefOffsetMap.entrySet()) {			BitSet derefLocationSet = new BitSet();			derefLocationSet.or(entry.getValue());			derefOffsetMap.put(entry.getKey(), derefLocationSet);		}	}