RFR: 8348263: C2 SuperWord: TestMemorySegment.java has failing IR rules with AlignVector after JDK-8343685

[Tobias Hartmann]

On Wed, 22 Jan 2025 09:09:41 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

> In [JDK-8343685](https://bugs.openjdk.org/browse/JDK-8343685) / https://git.openjdk.org/jdk/pull/21926 I enabled some IR rules, but forgot to test with `-XX:+AlignVector`. Now those rules fail and need a corresponding `applyIf`.
> 
> Additionally, I now enabled 2 more IR rules that I forgot to enable in https://git.openjdk.org/jdk/pull/21926.
> 
> To ensure we automatically run this test with  `-XX:+AlignVector`, I added some additional runs. I already did a similar thing with other tests that have IR rules that are sensitive to `AlignVector`.

Looks good to me.

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Marked as reviewed by thartmann (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/23229#pullrequestreview-2566637038