[vectorIntrinsics+compress] RFR: 8274889: Intrinsify Vector.expand/compress APIs for X86 [v5]

[Eric Liu]

On Mon, 11 Oct 2021 12:11:45 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> - Common C2 compiler entry point for compress/expand APIs.
>> - Inline expansion handling and C2 graph creation.
>> - For X86 current backed support is added for AVX512 which offers direct compress/expand instructions.
>
> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
> 
>   8274889: Review comments resolution.

Shared code looks good. I'm going to add AArch64 backend support base on this.

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Marked as reviewed by eliu (Committer).

PR: https://git.openjdk.java.net/panama-vector/pull/146