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

[Xiaohong Gong]

> Hi, could anyone please take a look at this simple merge? Thanks!
> 
> This patch merges the latest vectorIntrinsics into vectorIntrinsics+mask, with resolving the conflicts in `"src/hotspot/cpu/aarch64/register_aarch64.hpp"`.
> 
> Tested tier1 and jdk:tier3.

Xiaohong Gong has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 13 commits:

 - Merge branch 'panama-vector:vectorIntrinsics' into vectorIntrinsics+mask
 - 8270264: Add the masking support for vector lanewiseShift
   
   Reviewed-by: jbhateja, psandoz
 - 8266287: Basic mask IR implementation for the Vector API masking feature support
   
   Reviewed-by: sviswanathan
 - 8269282: Add masking support for vector gather_load/scatter_store
   
   Reviewed-by: jbhateja
 - 8269343: Masked vector arithmetic intrinsics failed to be inlined randomly
   
   Reviewed-by: psandoz
 - 8267368: Add masking support for reduction vector intrinsics
   
   Reviewed-by: psandoz
 - 8268154: Add masking support for vector load intrinsics
   
   Reviewed-by: jbhateja, psandoz
 - Merge panama-vector:vectorIntrinsics
 - Merge panama-vector:vectorIntrinsics
   
   Reviewed-by: njian
 - 8266621: Add masking support for unary/ternary vector intrinsics
   
   Reviewed-by: psandoz, vlivanov
 - ... and 3 more: https://git.openjdk.java.net/panama-vector/compare/a0f9d863...93805a00

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

Changes: https://git.openjdk.java.net/panama-vector/pull/102/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=102&range=01
  Stats: 7123 lines in 78 files changed: 5372 ins; 641 del; 1110 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/102.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/102/head:pull/102

PR: https://git.openjdk.java.net/panama-vector/pull/102