RFR: 8369456: [TESTBUG] Fix the test failure of TestSelectFromTwoVectorOp.java on sve2 platforms [v2]

[Xiaohong Gong]

On Thu, 30 Oct 2025 08:50:25 GMT, erifan <duke at openjdk.org> wrote:

>> Maybe it would be enough to just remove the `, IRNode.VECTOR_SIZE_64`, so that the test could check for the largest vector length available on the platform?
>
> Hi @eme64 thanks for your review. As the vector species is fixed `ByteVector.SPECIES_512`, removing `IRNode.VECTOR_SIZE_64` doesn't work. Adding a rule for cases where `MaxVectorSize > 64` makes sense to me. I'll add the rule in the next commit, thanks~

I'm afraid that there is not a machine which really runs with `MaxVectorSize > 64` both on X86 and AArch64.  Can we just check the `MaxVectorSize = 64` case?

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PR Review Comment: https://git.openjdk.org/jdk/pull/27723#discussion_r2479908586