RFR: 8355512: Test compiler/vectorization/TestVectorZeroCount.java times out with -XX:TieredStopAtLevel=3 [v2]

[Emanuel Peter]

On Mon, 19 May 2025 05:01:43 GMT, Jasmine Karthikeyan <jkarthikeyan at openjdk.org> wrote:

>> Hi all,
>> This is a small patch to TestVectorZeroCount to make it only execute when C2 is enabled, to fix a timeout with -XX:TieredStopAtLevel=3. This test takes a long time to finish without C2 because it iterates through all of the integers twice. Since the intention of the test is to stress the C2-specific `numberOfLeadingZeros` and `numberOfTrailingZeros` intrinsics, I think it makes sense to limit it to running with C2 only.
>> 
>> Reviews would be appreciated!
>
> Jasmine Karthikeyan has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Change requires to run test on Graal as well

Marked as reviewed by epeter (Reviewer).

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PR Review: https://git.openjdk.org/jdk/pull/25243#pullrequestreview-2849580311