availableLoadMap = new HashMap<AvailableLoad, ValueNumber[]>(); mergedLoads =  new HashMap<AvailableLoad,ValueNumber> (); previouslyKnownAs =  new HashMap<ValueNumber, AvailableLoad> ();
setAvailableLoadMap(Collections.EMPTY_MAP); setMergedLoads(Collections.EMPTY_MAP); setPreviouslyKnownAs(Collections.EMPTY_MAP);
	public ValueNumberFrame(int numLocals) {		super(numLocals);		if (REDUNDANT_LOAD_ELIMINATION) {			availableLoadMap = new HashMap<AvailableLoad, ValueNumber[]>();			mergedLoads =  new HashMap<AvailableLoad,ValueNumber> ();			previouslyKnownAs =  new HashMap<ValueNumber, AvailableLoad> ();		}	}