RFR: 8278868: Add x86 vectorization support for Long.bitCount() [v4]

[Vamsi Parasa]

On Wed, 5 Jan 2022 17:15:34 GMT, Sandhya Viswanathan <sviswanathan at openjdk.org> wrote:

>> Vamsi Parasa has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update popcount long test to use IR framework
>
> src/hotspot/cpu/x86/x86.ad line 1416:
> 
>> 1414:         return false;
>> 1415:       }
>> 1416:       break;
> 
> This case could be combined with case Op_PopCountVI and duplication removed. The check is the same for both.

Updated code as per your suggestion to avoid duplication in the latest commit...

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PR: https://git.openjdk.java.net/jdk/pull/6857