Bitwise integer complement:
            name = ~value

def not_(self, value, name=''):
        """
        Bitwise integer complement:
            name = ~value
        """
        if isinstance(value.type, types.VectorType):
            rhs = values.Constant(value.type, (-1,) * value.type.count)
        else:
            rhs = values.Constant(value.type, -1)
        return self.xor(value, rhs, name=name)