RFR: 8350463: AArch64: Add vector rearrange support for small lane count vectors

[Xiaohong Gong]

On Wed, 12 Mar 2025 12:45:09 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> It would also be good to add some IR tests, or possibly modify existing IR rules to reflect that more cases now vectorize, according to `Matcher::match_rule_supported_vector`.

Sure. I will add some IR tests. Thanks for looking at this PR!

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PR Comment: https://git.openjdk.org/jdk/pull/23790#issuecomment-2719513238