RFR: 8252505: C1/C2 compiler support for blackholes [v11]

[Aleksey Shipilev]

On 12/2/20 7:42 PM, Vladimir Ivanov wrote:
> The only difference I see is receiver becomes treated as an ordinary
> argument which is consumed by a blackhole while in the current
> implementation you ignore receiver.

Actually, I don't think we need to ignore receiver in current code. It is a left-over from my 
experiments that were only taking care of primitive arguments. Since current code is much more 
simple, we can just blackhole everything. Done in new commits.

>>> If you want to keep instance method support, please, double-check that
>>> null check stays there for correctness.
>>
>> OK, that looks empirically verifiable (i.e. with the jtreg test), will od.

Added a new test, seems to pass fine.

-- 
Thanks,
-Aleksey