[lworld] RFR: Merge jdk

[David Simms]

Remaining merge issues problem listed:
  * JDK-8301662
  * JDK-8301665

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

Commit messages:
 - Remaining merge issues problem listed:
 - Merge complete
 - more
 - more
 - Fixed TestGetfieldChains
 - Removed dead code leftover from c2_MacroAssembler_aarch64.cpp
 - more fixes
 - some fixes
 - First set of fixes, needs much more work
 - Merge conflict originals
 - ... and 363 more: https://git.openjdk.org/valhalla/compare/6cd250ff...3c47035b

The webrevs contain the adjustments done while merging with regards to each parent branch:
 - lworld: https://webrevs.openjdk.org/?repo=valhalla&pr=818&range=00.0
 - jdk: https://webrevs.openjdk.org/?repo=valhalla&pr=818&range=00.1

Changes: https://git.openjdk.org/valhalla/pull/818/files
  Stats: 26402 lines in 1393 files changed: 13742 ins; 7412 del; 5248 mod
  Patch: https://git.openjdk.org/valhalla/pull/818.diff
  Fetch: git fetch https://git.openjdk.org/valhalla pull/818/head:pull/818

PR: https://git.openjdk.org/valhalla/pull/818