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

Fri Sep 12 02:12:52 UTC 2025

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!

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Commit messages:
 - Backport 0b3a303053d0eb5a98ed3d9df42c659db148b470

Changes: https://git.openjdk.org/jdk25u/pull/185/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk25u&pr=185&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8367066
  Stats: 11 lines in 2 files changed: 2 ins; 5 del; 4 mod
  Patch: https://git.openjdk.org/jdk25u/pull/185.diff
  Fetch: git fetch https://git.openjdk.org/jdk25u.git pull/185/head:pull/185

PR: https://git.openjdk.org/jdk25u/pull/185