[jdk25u-dev] RFR: 8370405: C2: mismatched store from MergeStores wrongly scalarized in allocation elimination [v3]

[Aleksey Shipilev]

On Thu, 27 Nov 2025 12:43:28 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Fixes JDK 21 -> JDK 25 regression in C2 that can lead to miscompilation. There is a regression test that captures the failure.
>> 
>> Additional testing:
>>  - [x] Linux x86_64 server fastdebug, new regression test fails without the fix, passes with it
>>  - [x] Linux x86_64 server fastdebug, `all`
>
> Aleksey Shipilev has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:
> 
>   Backport 09a047f00c88d14505c42a966dedbc87b9be5bdf

Push approval granted.

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PR Comment: https://git.openjdk.org/jdk25u-dev/pull/10#issuecomment-3605537473