[lworld] RFR: 8237073: [lworld] Need special handling of jlO constructor invocation [v2]

[Srikanth Adayapalam]

> Translate new Object() instantiations down to invovations of java.util.Objects.newIdentity() call with an informational message at compie time

Srikanth Adayapalam has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains three additional commits since the last revision:

 - Incorporate review comments from Mandy Chung
 - Merge branch 'lworld' into JDK-8237073
 - 8237073: [lworld] Need special handling of jlO constructor invocation

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

Changes:
  - all: https://git.openjdk.java.net/valhalla/pull/481/files
  - new: https://git.openjdk.java.net/valhalla/pull/481/files/395f5ada..9f960b67

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=valhalla&pr=481&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=valhalla&pr=481&range=00-01

  Stats: 5227 lines in 24 files changed: 1028 ins; 1276 del; 2923 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/481.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/481/head:pull/481

PR: https://git.openjdk.java.net/valhalla/pull/481