RFR: 8294609: C2: Improve inlining of methods with unloaded signature classes [v3]

[Dean Long]

On Fri, 30 Sep 2022 20:56:52 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Maybe "loads signature classes" is the wrong choice of words.  I mean what SystemDictionary::check_signature_loaders() does.  Using the CI interface is guaranteed to go through SystemDictionary::check_signature_loaders(), right?
>
> CI doesn't use `SystemDictionary::check_signature_loaders()`. `ciSignature` constructor eventually calls into `SystemDictionary::find_constrained_instance_or_array_klass()` which also tries `LoaderConstraintTable::find_constrained_klass()` if local search fails.
> 
> I tried to stress that by stating that "signature classes aren't required to be local" and "it makes signature classes visible through loader constraints".

OK, thanks for the explanation.

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PR: https://git.openjdk.org/jdk/pull/10496