[lworld] RFR: 8335796: [lworld] several refactorins and bug fixes

[Vicente Romero]

fixing several bugs
cleanups and refactorings

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

Commit messages:
 - 8335796: [lworld] several small changes and refactorings

Changes: https://git.openjdk.org/valhalla/pull/1161/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1161&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8335796
  Stats: 34 lines in 7 files changed: 6 ins; 9 del; 19 mod
  Patch: https://git.openjdk.org/valhalla/pull/1161.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1161/head:pull/1161

PR: https://git.openjdk.org/valhalla/pull/1161