[vectorIntrinsics+mask] RFR: 8273264: AArch64: [vector] Add missing rules for VectorMaskCast [v2]

[Eric Liu]

On Tue, 14 Sep 2021 15:07:09 GMT, Paul Sandoz <psandoz at openjdk.org> wrote:

>> I tested with those conversion tests before, but the method could not be intrinsified. I checked generated code and the new test cases could work.
>
> Do you have any indicates as to why? Is it because the invocation count is too low?

The reason maybe the same as https://bugs.openjdk.java.net/browse/JDK-8259610, but I didn't pay too much time in the details.

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PR: https://git.openjdk.java.net/panama-vector/pull/124