RFR(M): 8223051: support loops with long (64b) trip counts

[Tobias Hartmann]

For the record, I've tested tier1-9 with "default" flags and tier1-5 with
-XX:StressLongCountedLoop=1 and -XX:StressLongCountedLoop=4294967295.

Please let me know if you think other flag combinations/values should be tested as well.

Best regards,
Tobias

On 20.08.20 17:34, Roland Westrelin wrote:
> 
>> Yes, webrev.03 looks good to me. I've re-run extended testing and the results look good.
> 
> Thanks for the review and testing!
> 
> Roland.
>