[lworld] RFR: 8345995: [lworld] Flat arrays need to be redesigned to support new flat layouts [v8]

[David Simms]

On Tue, 14 Jan 2025 22:13:10 GMT, Frederic Parain <fparain at openjdk.org> wrote:

>> Here's a redesign of flat arrays to support multiple flat layouts (NON_ATOMIC_FLAT, ATOMIC_FLAT, NULLABLE_ATOMIC_FLAT). The patch contains a lot of cleanup and simplification of the flat arrays access code.
>> 
>> This patch has been tested in interpreted mode only on both x86_64 and aarch64.
>> 
>> Unfortunately, it currently triggers a number of failures when run with JITs enabled. After a discussion with Tobias, this PR will probably not be integrated until a patch for the JITs is available.
>> 
>> Regards,
>> 
>> Fred
>
> Frederic Parain has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Update copyrights year

src/hotspot/share/oops/flatArrayKlass.hpp line 50:

> 48:  public:
> 49: 
> 50:   FlatArrayKlass() {} // Why?

Nuke it

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PR Review Comment: https://git.openjdk.org/valhalla/pull/1315#discussion_r1916822621