RFR: 8361829: [TESTBUG] RISC-V: compiler/vectorization/runner/BasicIntOpTest.java fails with RVV but not Zvbb

[Dingli Zhang]

On Thu, 10 Jul 2025 08:31:53 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Hi all,
> Please take a look and review this PR, thanks!
> 
> After [JDK-8355293](https://bugs.openjdk.org/browse/JDK-8355293) , compiler/vectorization/runner/BasicIntOpTest.java fails with RVV but not Zvbb.
> The reason for the error is that `PopCountVI` on RISC-V requires `Zvbb`, not just `RVV`.
> 
> ### Test
> - [x] Run compiler/vectorization/runner/BasicIntOpTest.java on k1
> - [x] Run compiler/vectorization/runner/BasicIntOpTest.java on qemu-system (enable RVV) w/ and w/o zvbb

Thanks all for the review!

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PR Comment: https://git.openjdk.org/jdk/pull/26238#issuecomment-3060087390