[vectorIntrinsics] RFR: 8263149: Adding some algorithms optimized by Vector API into JMH benc… [v2]

[Xiaohong Gong]

On Wed, 10 Mar 2021 06:11:19 GMT, Joshua Zhu <jzhu at openjdk.org> wrote:

>> test/jdk/jdk/incubator/vector/benchmark/src/main/java/benchmark/bigdata/BooleanArrayCheck.java line 56:
>> 
>>> 54:     bitsArray = new boolean[ARRAY_LENGTH];
>>> 55:     for (int i = 0; i < ARRAY_LENGTH; i++) {
>>> 56:       bitsArray[i] = true;
>> 
>> Is it possible to init random boolean values here? Always `true` might make it possible to make compiler optimize out the `"if (!bitsArray[filterPos])"` in the scalar version?
>
>> Is it possible to init random boolean values here?
> 
> In real scenario, all true in this case happens in high probability.
>> Always true might make it possible to make compiler optimize out the "if (!bitsArray[filterPos])" in the scalar version?
> 
> No. Will not be optimized out.

OK, if it doesn't influence the compiler behavior, it's to me. Thanks！

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PR: https://git.openjdk.java.net/panama-vector/pull/45