[jdk25u] RFR: 8367066: RISC-V: refine register selection in MacroAssembler:: decode_klass_not_null

[Dingli Zhang]

On Fri, 12 Sep 2025 02:05:11 GMT, Dingli Zhang <dzhang at openjdk.org> wrote:

> Hi all,
> 
> This pull request contains a backport of commit [0b3a3030](https://github.com/openjdk/jdk/commit/0b3a303053d0eb5a98ed3d9df42c659db148b470) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.
> 
> The commit being backported was authored by Hamlin Li on 11 Sep 2025 and was reviewed by Fei Yang and Feilong Jiang.
> 
> Thanks!

PS: tier1 tested on sg2042.

-------------

PR Comment: https://git.openjdk.org/jdk25u/pull/185#issuecomment-3285586645