[jdk18u] RFR: 8273139: C2: assert(f <= 1 && f >= 0) failed: Incorrect frequency

[Tobias Hartmann]

Backport of [JDK-8273139](https://bugs.openjdk.java.net/browse/JDK-8273139). Applies cleanly. Fix request is pending.

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Commit messages:
 - 8273139: C2: assert(f <= 1 && f >= 0) failed: Incorrect frequency

Changes: https://git.openjdk.java.net/jdk18u/pull/14/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk18u&pr=14&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8273139
  Stats: 19 lines in 1 file changed: 2 ins; 5 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk18u/pull/14.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk18u pull/14/head:pull/14

PR: https://git.openjdk.java.net/jdk18u/pull/14