[lworld] RFR: 8227588: [lworld] Better optimize non-flattened inline type array accesses [v2]

[Quan Anh Mai]

On Mon, 5 Jan 2026 12:32:49 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> Quan Anh Mai has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:
>> 
>>  - disable OSR compilation to avoid recompilation
>>  - Merge branch 'lworld' into 8227588
>>  - Fix JDK-8227588
>
> test/hotspot/jtreg/compiler/valhalla/inlinetypes/TestBasicFunctionality.java line 382:
> 
>> 380:     @Test
>> 381:     @IR(applyIf = {"UseArrayFlattening", "true"},
>> 382:         counts = {SCOPE_OBJECT, ">= 1"}) // LOAD_OF_ANY_KLASS, "<= 12"}) // TODO 8372332, 8374331 (loads should be removed)
> 
> What about setting `test12` to non-(OSR)-compilable before triggering the deopt, i.e. once `!info.isWarmUp()`? This would prevent re-compilation. You can get the method via the `info` object.

That is a good idea!

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PR Review Comment: https://git.openjdk.org/valhalla/pull/1855#discussion_r2665623693