[jdk17u-dev] RFR: 8292602: ZGC: C2 late barrier analysis uses invalid dominator information

[Goetz Lindenmaier]

I backport this for parity with 17.0.7-oracle.

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Commit messages:
 - Backport eec992c6b0ac77d08478d852a80c9470418d925d

Changes: https://git.openjdk.org/jdk17u-dev/pull/997/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=997&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292602
  Stats: 69 lines in 4 files changed: 69 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/997.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/997/head:pull/997

PR: https://git.openjdk.org/jdk17u-dev/pull/997