[lworld] RFR: 8367518: TestRedundantLea.java fails in Valhalla [v2]

[duke]

On Mon, 22 Sep 2025 12:53:22 GMT, Manuel Hässig <mhaessig at openjdk.org> wrote:

>> After merging `TestRedundantLea.java` into valhalla it turned out that the `StringInflate` and `StoreN*` subtests fail. This PR fixes that by bringing over two commits from mainline that fix problems with this test, which already fixes `StringInflate`.
>> 
>> The problem with the `StoreN` cases is that with valhalla C2 does not generate spills that the peephole can remove. To still test removing spills I came up with a new test case specifically for spills.
>> 
>> Testing:
>>  - [x] tier1,tier2 plus some stress testing
>
> Manuel Hässig has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Apply suggestions from Christian
>   
>   Co-authored-by: Christian Hagedorn <christian.hagedorn at oracle.com>

@mhaessig 
Your change (at version 10670b68d2d45f8c06df4b8a7bf81f1ee52cd610) is now ready to be sponsored by a Committer.

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PR Comment: https://git.openjdk.org/valhalla/pull/1605#issuecomment-3324035445