RFR: 8257806: Optimize x86 allTrue and anyTrue vector mask operations of Vector API [v2]

[Sandhya Viswanathan]

On Thu, 10 Dec 2020 00:23:54 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

>> Sandhya Viswanathan 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 two additional commits since the last revision:
>> 
>>  - Merge branch 'master' of https://git.openjdk.java.net/jdk into vptest
>>  - 8257806: Optimize x86 allTrue and anyTrue vector mask operations of Vector API
>
> I have concerns about GitHub testing failures. And I don't see in the RFE links to testing.
> I understand and agree with changes in general but I can't judge correctness of code.

@vnkozlov The patch is Vector API specific. I have run the Vector API tests on all our platforms with this patch (non avx, avx, avx512) and they all pass. The github test failures seem to be unrelated to the patch. e.g. the Linux x64 seems to show the following as log: 
Run if ! grep --include=test-summary.txt -lqr build/*/test-results -e "TEST SUCCESS" ; then
# newfailures.txt
tools/javac/diags/CheckExamples.java 
Error: Process completed with exit code 1.
I will try to reissue the github tests.

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PR: https://git.openjdk.java.net/jdk/pull/1656