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

[Emanuel Peter]

On Thu, 15 May 2025 02:29:11 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!

@jaskarth @chhagedorn Hmm, this means that this test could not be run with GraalVM, for example. That's a shame.
Do we not have some way to assert that there should be "some fast compiler"? Ah, what does `vm.flavor == "server"` do? Because I have seen lines like `vm.flavor == "server" & !vm.graal.enabled` before.

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PR Comment: https://git.openjdk.org/jdk/pull/25243#issuecomment-2883965797