[jdk17u-dev] RFR: 8275337: C1: assert(false) failed: live_in set of first block must be empty

[Martin Doerr]

Clean backport of [JDK-8275337](https://bugs.openjdk.java.net/browse/JDK-8275337)

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Commit messages:
 - Backport 4191b2b9b98c1137e5f27e3b64efb83857fa2c91

Changes: https://git.openjdk.java.net/jdk17u-dev/pull/294/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u-dev&pr=294&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275337
  Stats: 71 lines in 2 files changed: 70 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk17u-dev/pull/294.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u-dev pull/294/head:pull/294

PR: https://git.openjdk.java.net/jdk17u-dev/pull/294