RFR: 8303762: [vectorapi] Intrinsification of Vector.slice [v6]

[Quan Anh Mai]

On Tue, 11 Apr 2023 19:03:21 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>> Quan Anh Mai has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   style
>
> src/jdk.incubator.vector/share/classes/jdk/incubator/vector/ShortVector.java line 2295:
> 
>> 2293:                 // to be performant
>> 2294:                 @ForceInline
>> 2295:                 public ShortVector apply(ShortVector v1, ShortVector v2, int o) {
> 
> Have you considered matching the corresponding IR during GVN to produce VectorSlice nodes rather than going through VM intrinsic?

I have thought about this but it will require C2 to track the values of individual elements in a vector and constant fold vector loads from stable fields, both of which are not available as of right now.

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PR Review Comment: https://git.openjdk.org/jdk/pull/12909#discussion_r1186028378