RFR: 8373026: C2 SuperWord and Vector API: vector algorithms test and benchmark [v11]

[Emanuel Peter]

On Wed, 21 Jan 2026 09:14:41 GMT, Xiaohong Gong <xgong at openjdk.org> wrote:

>> Emanuel Peter has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   use firstTrue for XiaohongGong
>
> test/hotspot/jtreg/compiler/vectorization/VectorAlgorithmsImpl.java line 486:
> 
>> 484:         int sum = 0;
>> 485:         int i = 0;
>> 486:         for (; i < a.length - 3; i+=4) {
> 
> Suggestion:
> 
>         for (; i < a.length - 3; i += 4) {

Will adjust it in all places :)

> test/hotspot/jtreg/compiler/vectorization/VectorAlgorithmsImpl.java line 695:
> 
>> 693:         for (; i < SPECIES_I.loopBound(oops.length); i += SPECIES_I.length()) {
>> 694:             var oopv = IntVector.fromArray(SPECIES_I, oops, i);
>> 695:             var mask = oopv.compare(VectorOperators.NE, nulls);
> 
> Is this better? `nulls` can be removed although it may have no difference for compilation result?
> Suggestion:
> 
>             var mask = oopv.compare(VectorOperators.NE, 0);

Nice idea, I adjusted it in both places :)

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PR Review Comment: https://git.openjdk.org/jdk/pull/28639#discussion_r2711792269
PR Review Comment: https://git.openjdk.org/jdk/pull/28639#discussion_r2711807184