[vectorIntrinsics] RFR: 8258072: Add Reinterpret nodes implementation for Arm SVE [v3]

[Xiaohong Gong]

On Thu, 7 Jan 2021 07:29:19 GMT, Wang Huang <whuang at openjdk.org> wrote:

>> Add reduction nodes support for Arm SVE. Add the backend codegen for node like "VectorReinterpret" .
>> In this patch, We implement these instructs: 
>> *  reinterpret (src == dst)
>> *  reinterpretResize, including,
>>   1）  reinterpret（Expand） (src < dst)
>>   2） reinterpret（Shrink） (src > dst)
>> 
>> At the same time, we fix a bug (JDK-8258989) because it is not merged in panama-vector/vectorIntrinsics.
>
> Wang Huang has updated the pull request incrementally with one additional commit since the last revision:
> 
>   fix reinterpretNode implementation

Marked as reviewed by xgong (no project role).

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PR: https://git.openjdk.java.net/panama-vector/pull/30