[jdk19u] RFR: 8290711: assert(false) failed: infinite loop in PhaseIterGVN::optimize

Thu Sep 22 14:48:34 UTC 2022

Backport of [JDK-8290711](https://bugs.openjdk.java.net/browse/JDK-8290711). Applies cleanly expect for a change to surrounding code in `PhaseCCP::analyze`. Approval is pending.

Thanks,
Tobias

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Commit messages:
 - 8290711: assert(false) failed: infinite loop in PhaseIterGVN::optimize

Changes: https://git.openjdk.org/jdk19u/pull/38/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk19u&pr=38&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8290711
  Stats: 112 lines in 3 files changed: 112 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk19u/pull/38.diff
  Fetch: git fetch https://git.openjdk.org/jdk19u pull/38/head:pull/38

PR: https://git.openjdk.org/jdk19u/pull/38