RFR: 8351666: [PPC64] Make non-volatile VectorRegisters available for C2 register allocation [v4]

[Martin Doerr]

On Thu, 10 Apr 2025 23:29:13 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> Also instead of bare indices we could `R0_H_num`, `F31_H_num`, etc.
>
> I think this doesn't really fit into the scope of this PR. Maybe we could investigate that separately.

Filed https://bugs.openjdk.org/browse/JDK-8354650.

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PR Review Comment: https://git.openjdk.org/jdk/pull/23987#discussion_r2044102086