RFR: 8290892: C2: Intrinsify Reference.reachabilityFence [v6]

[Vladimir Ivanov]

On Mon, 16 Jun 2025 09:44:48 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Are you asking specifically about `ReachabilityFence -> DecodeN -> LoadN` shape? Yes, it's common, especially after inlining.
>
> @iwanowww Can you add a code comment why this is safe to look through the ReachabilityFence?

Done.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25315#discussion_r2320062861