RFR: 8303508: Vector.lane() gets wrong value on x86

[Eric Liu]

On Thu, 23 Mar 2023 00:37:29 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

> Incorrectness happens because compiler absorbs casting IR chain during idealizations.
> Sign extending the result of sub-word extraction operation.
> 
> Please refer to detailed discussion on https://github.com/openjdk/jdk/pull/13070#issuecomment-1479779537 
> 
> Best Regards,
> Jatin

Looks good to me. Thanks for your fix.

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Marked as reviewed by eliu (Committer).

PR Review: https://git.openjdk.org/jdk/pull/13152#pullrequestreview-1353700842