[vectorIntrinsics+compress] RFR: 8276083: Incremental patch to further optimize new compress/expand APIs over X86 [v2]

[Paul Sandoz]

On Thu, 28 Oct 2021 20:36:32 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

>> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8276083: Review comments resolved.
>
> How did the perf tests get generated? I don't see any related changes to see how they would be generated.

> @PaulSandoz , your comments are addressed. Please let me know if there are further comments.

Did you run `gen-tests.sh`? 

I tried running that on a clone of your branch and it generates more code, some of which does not compile:

1. `maskCompress` iterates over a non-existent array `a`.
2. Benchmarks for ROR and ROL are generated and the scalar benchmarks refer to non-existent methods `ROR_scalar` and `ROL_scalar`.
3. The gather/scatter benchmarks are deleted.

So it looks like we got out on sync. We should fix the latter two in `vectorIntrinsics` so you can merge that in.

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PR: https://git.openjdk.java.net/panama-vector/pull/157