[jdk21u-dev] RFR: 8320807: [PPC64][ZGC] C1 generates wrong code for atomics

[Martin Doerr]

On Wed, 13 Dec 2023 09:44:20 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> Backport of [JDK-8320807](https://bugs.openjdk.org/browse/JDK-8320807).

Pre-submit test failures are unrelated. This PR only touches PPC64 files.

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PR Comment: https://git.openjdk.org/jdk21u-dev/pull/4#issuecomment-1855678479