[vectorIntrinsics] RFR: 8285281: [x86] Add C2 mid-end and back-end implementation for COMPRESS_BITS and EXPAND_BITS operations [v2]

[Jatin Bhateja]

On Fri, 22 Apr 2022 09:15:06 GMT, Xiaohong Gong <xgong at openjdk.org> wrote:

>> Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   8285281: Removing CompressExpand.java since fallback implementation directly calls new [Integer/Long].[compress/expand] Java SE APIs
>
> src/hotspot/share/opto/vectorIntrinsics.cpp line 349:
> 
>> 347: }
>> 348: 
>> 349: Node* LibraryCallKit::gen_bitshuffle_operation(int voper, BasicType elem_bt, int num_elem, Node* opd1, Node* opd2) {
> 
> Could you please rename `voper` to `opc` ? The name looks like the opcode expected to be a vector type.

ok

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PR: https://git.openjdk.java.net/panama-vector/pull/195