RFR: 8351949: RISC-V: Cleanup and enable store-load peephole for membars [v8]

[Hamlin Li]

On Thu, 3 Apr 2025 06:30:18 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> Sorry, I now understand, you mean after doing all these checks if we can elide.
>> 
>> Yes, that seems good.
>
> It's not possible as rv pause is encoded as "fence w, 0".

I see, thanks!

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PR Review Comment: https://git.openjdk.org/jdk/pull/24035#discussion_r2026572204