[lworld] RFR: 8326605: [lworld] SplitIfSharedFastLockBehindCastPP performs synchronization on a value class

[Tobias Hartmann]

I fixed the test to not synchronize on a value class and verified that the test still triggers the original bug.

Best regards,
Tobias

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Commit messages:
 - 8326605: [lworld] SplitIfSharedFastLockBehindCastPP performs synchronization on a value class

Changes: https://git.openjdk.org/valhalla/pull/1208/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1208&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8326605
  Stats: 10 lines in 1 file changed: 9 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/1208.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1208/head:pull/1208

PR: https://git.openjdk.org/valhalla/pull/1208