if (load1 == null) load1 = previouslyKnownAs.get(v1);
if (load1 == null) load1 = getPreviouslyKnownAs().get(v1);
	public boolean fromMatchingLoads(ValueNumber v1, ValueNumber v2) {		AvailableLoad load1 = getLoad(v1);		if (load1 == null) load1 = previouslyKnownAs.get(v1);		if (load1 == null) return false;		AvailableLoad load2 = getLoad(v2);		if (load2 == null) load2 = previouslyKnownAs.get(v2);		if (load2 == null) return false;		return load1.equals(load2);	}