[lworld] RFR: Merge jdk [v2]

[David Simms]

> Merge tag 'jdk-16+15'

David Simms has updated the pull request with a new target base due to a merge or a rebase. The pull request now
contains 984 commits:

 - Merge message
 - Merge tag 'jdk-16+15' into lworld_merge_jdk_16_15
   
   Added tag jdk-16+15 for changeset 4333942
   
   # Conflicts:
   #	.jcheck/conf
   #	src/hotspot/share/opto/matcher.cpp
   #	src/hotspot/share/opto/type.cpp
   #	src/hotspot/share/prims/methodHandles.cpp
   #	src/java.base/share/classes/java/lang/invoke/DirectMethodHandle.java
 - Merge jdk
   
   Merge tag 'jdk-16+14'
 - 8252506: [lworld] Multiple issues with C2's arraycopy intrinsic
 - 8252862: [lworld] Accidentally disabled fix for JDK-8252110
 - 8252854: [lworld] Buffering in C1 entry can trigger safepoint before nmethod entry barrier has been executed
 - 8252753: [lworld] Merge of jdk-16+12 broke CDS for inline types
   
   implemented handling of MetaspaceClosure::_internal_pointer_ref
   
   Reviewed-by: dsimms
 - Merge jdk
   
   Merge tag 'jdk-16+13'
 - Merge jdk
   
   Merge tag 'jdk-16+12'
 - Merge jdk
   
   Merge tag 'jdk-16+11'
 - ... and 974 more: https://git.openjdk.java.net/valhalla/compare/43339420...183f1cc7

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

Changes: https://git.openjdk.java.net/valhalla/pull/183/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=183&range=01
  Stats: 122354 lines in 1232 files changed: 116824 ins; 1315 del; 4215 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/183.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/183/head:pull/183

PR: https://git.openjdk.java.net/valhalla/pull/183