RFR: 8332603: [PPC64] Improve itable_stub [v2]

[Amit Kumar]

On Sat, 15 Jun 2024 14:37:37 GMT, Amit Kumar <amitkumar at openjdk.org> wrote:

>> PPC Port similar to [JDK-8305959 (x86)](https://bugs.openjdk.org/browse/JDK-8305959) and [JDK-8307352(aarch64)](https://bugs.openjdk.org/browse/JDK-8307352)
>
> Amit Kumar has updated the pull request incrementally with one additional commit since the last revision:
> 
>   consistency

got some failures, looking into those;

Got failures in CDS, when running the test with exploded-jdk; Running in optimized-jdk shows that test are passing;

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PR Comment: https://git.openjdk.org/jdk/pull/19733#issuecomment-2170031487
PR Comment: https://git.openjdk.org/jdk/pull/19733#issuecomment-2170101973