[jdk17u] RFR: 8271276: C2: Wrong JVM state used for receiver null check

[Tobias Hartmann]

Backport of [JDK-8271276](https://bugs.openjdk.java.net/browse/JDK-8271276). Applies cleanly.

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Commit messages:
 - 8271276: C2: Wrong JVM state used for receiver null check

Changes: https://git.openjdk.java.net/jdk17u/pull/19/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17u&pr=19&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8271276
  Stats: 57 lines in 2 files changed: 50 ins; 7 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk17u/pull/19.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17u pull/19/head:pull/19

PR: https://git.openjdk.java.net/jdk17u/pull/19