Backing out shuffle related overhaul done with [JDK-8304450](https://bugs.openjdk.org/browse/JDK-8304450), we saw significant performance degradation with VectorAPI JMH and our internal benchmarks. Following two issues were filed on this recently.
1/ [JDK-8310459](https://bugs.openjdk.org/browse/JDK-8310459): We observed significant performance drop in VectorAPI slice / unslice performance w.r.t to JDK-20. 2/ [JDK-8309373](https://bugs.openjdk.org/browse/JDK-8309373): Performance drop in Vector-API based kernel with JDK-21. A follow-up JBS [JDK-8310691](https://bugs.openjdk.org/browse/JDK-8310691) is created to address this in JDK-22. Best Regards, Jatin ------------- Commit messages: - 8310459: [BACKOUT] 8304450: [vectorapi] Refactor VectorShuffle implementation Changes: https://git.openjdk.org/jdk/pull/14629/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14629&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8310459 Stats: 3895 lines in 64 files changed: 1169 ins; 1819 del; 907 mod Patch: https://git.openjdk.org/jdk/pull/14629.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/14629/head:pull/14629 PR: https://git.openjdk.org/jdk/pull/14629
