RFR: 8346954: [JMH] jdk.incubator.vector.MaskedLogicOpts fails due to IndexOutOfBoundsException

[Paul Sandoz]

On Mon, 17 Feb 2025 06:40:11 GMT, Nicole Xu <duke at openjdk.org> wrote:

>> Please try with following command line
>> `java -jar target/benchmarks.jar -f 1 -i 2 -wi 1 -w 30 -p ARRAYLEN=30 MaskedLogic`
>
> Thanks for pointing that out. Typically, ARRAYLEN is almost always a POT value, which is also assumed by many other benchmarks. Are we realistically going to test with an ARRAYLEN of 30? 
> 
> I think the POT assumption is reasonable for our purposes.

It's a reasonable assumption. Since `ARRAYLEN` is a parameter of the benchmark we should enforce that constraint in benchmark initialization method, checking if the value is POT and failing otherwise.

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PR Review Comment: https://git.openjdk.org/jdk/pull/22963#discussion_r1968595640