[lworld] RFR: 8376814: [lworld] ValueCompositionTest doesn't support NULLABLE_NON_ATOMIC_FLAT layout [v2]

[Frederic Parain]

> Simple test update to cover NULLABLE_NON_ATOMIC_FLAT layout.
> 
> Tested with Mach5 tier1.
> 
> Fred

Frederic Parain 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 two additional commits since the last revision:

 - Merge remote-tracking branch 'upstream/lworld' into 8376814
 - Update test to cover NULLABLE_NON_ATOMIC_FLAT

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

Changes:
  - all: https://git.openjdk.org/valhalla/pull/2040/files
  - new: https://git.openjdk.org/valhalla/pull/2040/files/59061a99..8e1374a8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=valhalla&pr=2040&range=01
 - incr: https://webrevs.openjdk.org/?repo=valhalla&pr=2040&range=00-01

  Stats: 222 lines in 17 files changed: 158 ins; 15 del; 49 mod
  Patch: https://git.openjdk.org/valhalla/pull/2040.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/2040/head:pull/2040

PR: https://git.openjdk.org/valhalla/pull/2040