On Mon, 16 Sep 2024 17:50:52 GMT, Henry Jen <henry...@openjdk.org> wrote:

> This PR split out large array/set construction into separate factory methods 
> to avoid oversized method trying to construct several of those.
> 
> In order to do that, we will need to generate those help methods on demand in 
> the class builder. Here we have two approach, one is for dedup set, which is 
> processed in advance so we can know what methods should be created.
> 
> Another is for random set, such as packages, thus we put those request into a 
> queue to amend the class later.
> 
> To keep the optimization of caching built value that are references more than 
> once, it was implemented using local vars, which doesn't work well for helper 
> methods. The existing approach to populate local vars doesn't work well with 
> larger scope of split operation, as the slot was allocated on lazily built, 
> but the transfer is captured in advance, this count could mismatch as built 
> time and run time.
> 
> So we make this build in advance, and use a static array for values referred 
> more than once.
> 
> All the codegen instead of giving index to be loaded, the builder snippet now 
> load the wanted set/array to the operand stack to be consistent.

Absolutely, updated the description.

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PR Comment: https://git.openjdk.org/jdk/pull/21022#issuecomment-2367161927

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