RFR: 8355094: Performance drop in auto-vectorized kernel due to split store [v2]

Mon May 19 09:32:54 UTC 2025

On Mon, 19 May 2025 09:23:28 GMT, Tobias Hartmann <thartmann at openjdk.org> wrote:

>> Emanuel Peter has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Update src/hotspot/share/opto/superword.cpp
>>   
>>   Co-authored-by: Manuel Hässig <manuel at haessig.org>
>
>> Impressive analysis, Emanuel! Very deep, thorough, and insightful.
> 
> +1 to this. Great work, Emanuel! The fix looks good to me.

@TobiHartmann Thank you for the review :)

@theRealAph @XiaohongGong Do you have any idea about the somewhat confusing behavior of aarch64 in these benchmarks?

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PR Comment: https://git.openjdk.org/jdk/pull/25065#issuecomment-2890320006