RFR: 8283894: Intrinsify compress and expand bits on x86 [v5]

[Sandhya Viswanathan]

On Wed, 18 May 2022 07:50:39 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> Summary of changes:
>> 
>> - Patch intrinsifies following newly added Java SE APIs
>>   - Integer.compress
>>   - Integer.expand
>>   - Long.compress
>>   - Long.expand
>>   
>> - Adds C2 IR nodes and corresponding ideal transformations for new operations.
>> - We see around ~10x performance speedup due to intrinsification over X86 target. 
>> - Adds an IR framework based test to validate newly introduced IR transformations.
>> 
>> Kindly review and share your feedback.
>> 
>> Best Regards,
>> Jatin
>
> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8283894: Updating test tag spec.

Looks good to me.

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Marked as reviewed by sviswanathan (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/8498