RFR: 8332603: [PPC64] Improve itable_stub [v3]

[Martin Doerr]

On Mon, 17 Jun 2024 16:11:26 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:
> 
>   fixes the test case

This looks like a correct and direct port from aarch64. I'm fine with it. Testing has passed. I'll look at the performance, too.

src/hotspot/cpu/ppc/vtableStubs_ppc_64.cpp line 3:

> 1: /*
> 2:  * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved.
> 3:  * Copyright (c) 2012, 2023 SAP SE. All rights reserved.

Copyright year should be 2024 for both, SAP and Oracle.

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PR Review: https://git.openjdk.org/jdk/pull/19733#pullrequestreview-2133159909
PR Review Comment: https://git.openjdk.org/jdk/pull/19733#discussion_r1649270420