RFR: 8160821: VarHandle accesses are penalized when argument conversion is required [v6]

[Chen Liang]

On Thu, 4 Dec 2025 01:55:57 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> I don't think we can use a SoftReference here if we need to achieve constant folding.
>> 
>> Looking at inline_reference_get0, I think we might introduce another field property to trust a reference (potentially in an array) if both that reference and the referent within the reference is non-null.  I think that belongs to a separate RFE. What do you think?
>
> Then it makes sense to limit the caching to safe cases only for now. Otherwise, it would functionally regress due to a possible memory leak.

I have added a primitive checking system to ensure safety for most cases and added a unit test to ensure there is no memory leak due to this cache.

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PR Review Comment: https://git.openjdk.org/jdk/pull/28585#discussion_r2596829153