[vectorIntrinsics+mask] RFR: Merge panama-vector:vectorIntrinsics [v2]

[Sandhya Viswanathan]

> Bringing vectorIntrinsics changes to vectorIntrinsics+mask.

Sandhya Viswanathan has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains seven commits:

 - Merge vectorIntrinsics
 - Merge branch 'vectorIntrinsics' into vectorIntrinsics+mask branch
 - Merge panama-vector:vectorIntrinsics
   
   Reviewed-by: njian
 - 8266621: Add masking support for unary/ternary vector intrinsics
   
   Reviewed-by: psandoz, vlivanov
 - 8264563: Add masked vector intrinsics for binary/store operations
   
   Co-authored-by: Ningsheng Jian <njian at openjdk.org>
   Reviewed-by: jbhateja, sviswanathan, vlivanov, whuang
 - 8265109: SVE predicate register allocation support for vectorIntrinsics
   
   Reviewed-by: sviswanathan
 - Merge panama-vector:vectorIntrinsics

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

Changes: https://git.openjdk.java.net/panama-vector/pull/93/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=93&range=01
  Stats: 3802 lines in 68 files changed: 2698 ins; 465 del; 639 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/93.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/93/head:pull/93

PR: https://git.openjdk.java.net/panama-vector/pull/93