RFR: 8255210: [Vector API] jdk/incubator/vector/Int256VectorTests.java crashes on AVX512 machines

[Jie Fu]

On Thu, 22 Oct 2020 03:12:31 GMT, Jie Fu <jiefu at openjdk.org> wrote:

> Hi all,
> 
> Please review the fix of an AVX512 crash for Vector API.
> The reason is that reductionI in x86.ad didn't use legVec for code generation, which is required by Assembler::vphaddd.
> 
> Testing:
>  - test/jdk/jdk/incubator/vector all passed on both AVX256 and AVX512 machines
> 
> Thanks.
> Best regards,
> Jie

> Hi @DamonFool , similar problem also exists for reduction patterns for other primitive types (Long/Float/Double).

Hi @jatin-bhateja ,

Thanks for your reminder.

I've also noticed these problems.
But I don't have a reproducer right now.
And I need some time to construct one.

So I plan to file another bug to fix them when the reproducer is ready.

Thanks.

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PR: https://git.openjdk.java.net/jdk/pull/791