RFR: 8285437: riscv: Fix MachNode size mismatch for MacroAssembler::verify_oops* [v2]

[Fei Yang]

On Sat, 23 Apr 2022 03:27:17 GMT, Xiaolin Zheng <xlinzheng at openjdk.org> wrote:

>> Trivial and same as [JDK-8283737](https://bugs.openjdk.java.net/browse/JDK-8283737): in fastdebug build, MacroAssembler::verify_oop is used in match rules encodeHeapOop and decodeHeapOop, which also requires a fixed length.
>> 
>> Logs are inside the JBS issue, and this issue could be reproduced by using `-XX:+VerifyOops`.
>> 
>> Tested using `-XX:+VerifyOops` and a hotspot tier1 on qemu.
>> 
>> Thanks,
>> Xiaolin
>
> Xiaolin Zheng has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Add some comments

Code comment looks good. Thanks.

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Marked as reviewed by fyang (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/8356