RFR: 8331117: [PPC64] secondary_super_cache does not scale well [v2]

[Richard Reingruber]

On Sat, 15 Jun 2024 09:03:57 GMT, Andrew Haley <aph at openjdk.org> wrote:

> > That doesn't look like a platform specific thing. I'm getting the same result on x86_64. @theRealAph: Is that a known limitation or is it worth a new JBS issue?
> 
> Ah, I see. The test is doing some IR node counts for Klass loads, and `-UseSecondarySupersCache` deletes one of those loads. So it's not actually a behavioural change. I'm not sure what to do about this.

I think the `@IR` rule can be duplicated using `applyIf` to distinguish between `-XX:-UseSecondarySupersCache` and `-XX:+UseSecondarySupersCache`

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PR Comment: https://git.openjdk.org/jdk/pull/19368#issuecomment-2172919531