RFR: 8271366: [REDO] JDK-8266054 VectorAPI rotate operation optimization [v2]

[Sandhya Viswanathan]

On Fri, 30 Jul 2021 18:53:59 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

>> The rotate by could come from an expression, it does not need to be a LoadI.
>
> Yes, pessimistic relaxed checking should be full proof here (only based on target feature check for variable shifts). Let me know if there are other better thoughts otherwise.

Agree, let us be conservative and restrict based on target feature check for variable shifts.

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PR: https://git.openjdk.java.net/jdk/pull/4924