RFR: 8254814: [Vector API] Fix an AVX512 crash after JDK-8223347

[Tobias Hartmann]

On Thu, 15 Oct 2020 06:22:28 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> As discussed here[1], it's time to integrate this fix.
> And the original PR is here[2].
> 
> Testing:
>   - All jdk/incubator/vector/ tests passed on Linux/x64 AVX512 machines
> 
> [1] https://github.com/openjdk/jdk/pull/367#issuecomment-701560441
> [2] https://github.com/openjdk/panama-vector/pull/1

Marked as reviewed by thartmann (Reviewer).

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PR: https://git.openjdk.java.net/jdk/pull/676