public Value unaryOperation(final AbstractInsnNode insn, final Value value) {
		int size;
		switch (insn.getOpcode()) {
		case LNEG:
		case DNEG:
		case I2L:
		case I2D:
		case L2D:
		case F2L:
		case F2D:
		case D2L:
			size = 2;
			break;
		case GETFIELD:
			size = Type.getType(((FieldInsnNode) insn).desc).getSize();
			break;
		default:
			size = 1;
		}
		return new SourceValue(size, insn);
	}