RFR: 8271515: Integration of JEP 417: Vector API (Third Incubator)

[Vladimir Kozlov]

On Fri, 8 Oct 2021 21:25:26 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

> This PR improves the performance of vector operations that accept masks on architectures that support masking in hardware, specifically Intel AVX512 and ARM SVE.
> 
> On architectures that do not support masking in hardware the same technique as before is applied to most operations, specifically composition using blend.
> 
> Masked loads/stores are a special form of masked operation that require additional care to ensure out-of-bounds access throw exceptions. The range checking has not been fully optimized and will require further work.
> 
> No API enhancements were required and only a few additional tests were needed.

C2 and x86 changes seems fine.

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Marked as reviewed by kvn (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/5873