RFR: 8332119: Incorrect IllegalArgumentException for C2 compiled permute kernel [v2]

[Jatin Bhateja]

> Currently inline expansion of vector to shuffle conversion simply type casts the vector holding indexes to byte vector[1] where as fallback implementation[2] also wraps the indexes to a valid index range [0, VEC_LEN-1) or generates a -ve index for exceptional / OOB indices.
> 
> This patch extends the conversion inline expander to match the fall back implementation. This imposes around 20% performance tax on Vector.toShuffle() intrinsic but fixes this functional bug.
> 
> Kindly review and share your feedback.
> 
> Best Regards,
> Jatin
> 
> PS: Patch also fixes an incorrectness issue reported with [JDK-8332118](https://bugs.openjdk.org/browse/JDK-8332118)
> 
> [1] https://github.com/openjdk/jdk/blob/master/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/FloatVector.java#L2352
> [2] https://github.com/openjdk/jdk/blob/master/src/jdk.incubator.vector/share/classes/jdk/incubator/vector/AbstractShuffle.java#L58

Jatin Bhateja has updated the pull request incrementally with one additional commit since the last revision:

  Review Comments Incorporated.

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/19442/files
  - new: https://git.openjdk.org/jdk/pull/19442/files/12cc2b42..102b78ae

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=19442&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=19442&range=00-01

  Stats: 9 lines in 3 files changed: 1 ins; 0 del; 8 mod
  Patch: https://git.openjdk.org/jdk/pull/19442.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19442/head:pull/19442

PR: https://git.openjdk.org/jdk/pull/19442