[jdk18u] RFR: 8271055: Crash during deoptimization with "assert(bb->is_reachable()) failed: getting result from unreachable basicblock" with -XX:+VerifyStack

[Tobias Hartmann]

Backport of [JDK-8271055](https://bugs.openjdk.java.net/browse/JDK-8271055). Applies cleanly. Approval is pending.

Thanks,
Tobias

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Commit messages:
 - 8271055: Crash during deoptimization with "assert(bb->is_reachable()) failed: getting result from unreachable basicblock" with -XX:+VerifyStack

Changes: https://git.openjdk.java.net/jdk18u/pull/67/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=67&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8271055
  Stats: 121 lines in 3 files changed: 120 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/67.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/67/head:pull/67

PR: https://git.openjdk.java.net/jdk18u/pull/67