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

[Dean Long]

On Fri, 30 Sep 2022 16:56:36 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> src/hotspot/share/ci/ciMethod.cpp line 1168:
>> 
>>> 1166:   // it makes signature classes visible through loader constraints.
>>> 1167:   // So, encountering an unloaded class signals it is absent both in
>>> 1168:   // the callee (local) and caller contexts.
>> 
>> Suggestion:
>> 
>>   // the callee (local) and caller contexts, because linking loads signature classes.
>
> Can you elaborate, please? Neither method resolution nor method selection steps trigger loading of signature classes.

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?

-------------

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