[vectorIntrinsics] RFR: Merge panama-vector:master [v2]

[Jatin Bhateja]

> - Merge panama-vector:master into vectorIntrinsics.
> - Validation done using vector API JTREGs at different AVX levels.
> 
> Kindly review and approve.
> 
> Regards,
> Jatin

Jatin Bhateja has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 239 commits:

 - Patch updated after latest commits on vectorIntrinsics
 - Merge branch 'master' of http://github.com/openjdk/panama-vector into mainline_merge
 - 8282789: Create a regression test for the JTree usecase of JDK-4618767
   
   Reviewed-by: aivanov
 - 8282548: Create a regression test for JDK-4330998
   
   Reviewed-by: aivanov
 - 8282270: java/awt/Robot Screen Capture tests fail after 8280861
   
   Reviewed-by: aivanov
 - 8282723: Add constructors taking a cause to JSSE exceptions
   
   Reviewed-by: wetmore, iris
 - 8282704: runtime/Thread/StopAtExit.java may leak memory
   
   Reviewed-by: dholmes, alanb
 - 8282534: Remove redundant null check in ChaCha20Cipher.engineInit
   
   Reviewed-by: xuelei
 - 8282574: Cleanup unnecessary calls to Throwable.initCause() in jdk.compiler
   
   Reviewed-by: darcy
 - 8283352: [CDS] SharedBaseAddress.java fails on x86_32
   
   Reviewed-by: dholmes, iklam, stuefe
 - ... and 229 more: https://git.openjdk.java.net/panama-vector/compare/b98dbd7d...003ad24f

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

Changes: https://git.openjdk.java.net/panama-vector/pull/183/files
 Webrev: https://webrevs.openjdk.java.net/?repo=panama-vector&pr=183&range=01
  Stats: 34955 lines in 1186 files changed: 21960 ins; 6294 del; 6701 mod
  Patch: https://git.openjdk.java.net/panama-vector/pull/183.diff
  Fetch: git fetch https://git.openjdk.java.net/panama-vector pull/183/head:pull/183

PR: https://git.openjdk.java.net/panama-vector/pull/183