if (v.getKind() == Item.Kind.CONSTANT) {
if (v.isConstant()) {
	public final void visit_i2b() {		final IntItem v = vstack.popInt();		if (v.getKind() == Item.Kind.CONSTANT) {			vstack.push(IntItem.createConst((byte) v.getValue()));		} else {			v.load(eContext);			final Register r = v.getRegister();			os.writeMOVSX(r, r, BYTESIZE);			vstack.push(v);		}	}