RFR: 8362838: RISC-V: Incorrect matching rule leading to improper oop instruction encoding

[Fei Yang]

On Tue, 15 Jul 2025 14:02:08 GMT, Feilong Jiang <fjiang at openjdk.org> wrote:

> Same as [JDK-8361892](https://bugs.openjdk.org/browse/JDK-8361892), but for riscv.
> 
> Testing:
> - [x] Tier1-3 & hotspot:tier4 on linux-riscv64

Look good to me. Thanks for fixing this.

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Marked as reviewed by fyang (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/26318#pullrequestreview-3036344155