collection of small fixes from running runtime tests with -Xcomp

[Tobias Hartmann]

On 16.03.2017 09:19, Roland Westrelin wrote:
>> Is C2 code relying on the ValueFactory_attribute used by vnew?
>> Vnew and this attribute are supposed to be removed in favor of the
>> vdefault/vwithfield solution to create values. If this is likely to cause
>> issues to C2, it’s time to speak up.
> 
> I don't think we have a problem with vnew and the ValueFactory_attribute
> going away. We'll just have to adjust the code.

Yes, I agree. Please let us now upfront, so we can adjust our code.

Thanks,
Tobias