RFR: 8328309: Remove malformed masked shift instruction selection patterns

[Sandhya Viswanathan]

On Sat, 16 Mar 2024 18:53:20 GMT, Jatin Bhateja <jbhateja at openjdk.org> wrote:

> - This bug fix patch removes existing masked logical right, logical left and arithmetic right shift memory operand patterns which do not take into account shift count rounding bitwise AND operation, this limits their applicability to generic cases.
> - [JDK-8319889](https://bugs.openjdk.org/browse/JDK-8319889) also reported unhandled operation assertion failure seen with some shift operation test points in Vector API JTREG tests along with -XX:+StressIncrementalInlining flag.
> 
> Best Regards,
> Jatin

Looks good to me.

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Marked as reviewed by sviswanathan (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/18338#pullrequestreview-1943687417