RFR: 8290892: C2: Intrinsify Reference.reachabilityFence [v3]

[Vladimir Ivanov]

On Mon, 16 Jun 2025 09:40:30 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Might be helpful if you write in a comment if this eliminates all or just some of the reachability fences.
>
> Can we limit it to cases where we actually have reachability fences?

Good point. Done.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25315#discussion_r2320121142