[lworld] RFR: 8306565: [lworld] Asserts with stress testing during PhaseCCP due to unexpected top types

[Tobias Hartmann]

We intermittently assert during PhaseCCP with stress flags because some node types are still top. We should simply handle such cases.

Best regards,
Tobias

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Commit messages:
 - 8306565: [lworld] Asserts with stress testing during PhaseCCP due to unexpected top types

Changes: https://git.openjdk.org/valhalla/pull/839/files
 Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=839&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8306565
  Stats: 3 lines in 2 files changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/valhalla/pull/839.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/839/head:pull/839

PR: https://git.openjdk.org/valhalla/pull/839