RFR: 8339939: [JVMCI] Don't compress abstract and interface Klasses

[Thomas Stuefe]

On Wed, 18 Sep 2024 09:49:48 GMT, Yudi Zheng <yzheng at openjdk.org> wrote:

>> drive-by comment, 32-bit is an implementation detail. The width of a narrowKlass will be adjustable with the upcoming JEP450. Referring to 32 bit may be obsolete soon.
>
> Thanks for the note! By adjustable you mean it can go beyond 32 bits?

No, it will be smaller. Lilliput 1 will probably ship with 22 bit narrowKlass, and we may reduce this further.

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PR Review Comment: https://git.openjdk.org/jdk/pull/20949#discussion_r1764786815