RFR: 8303762: Optimize vector slice operation with constant index using VPALIGNR instruction [v13]

[Jatin Bhateja]

On Tue, 17 Feb 2026 12:14:54 GMT, Quan Anh Mai <qamai at openjdk.org> wrote:

>> We only perform fallback inlining on first intrinsification failure for sliceOp, this is a very localized change.
>> https://github.com/jatin-bhateja/jdk/blob/1dfff5589c8b6c83dfc9810bddbb676c7982c904/src/hotspot/share/opto/callGenerator.cpp#L455
>
> Thanks for pointing out the change. I think that's more hacky than I have expected.

This is selective enablement of inlining for intrinsic failures which uses vector API in the fall back implimentation.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24104#discussion_r2825899746