RFR: 8290892: C2: Intrinsify Reference.reachabilityFence [v19]

[Emanuel Peter]

On Fri, 7 Nov 2025 06:34:34 GMT, Vladimir Ivanov <vlivanov at openjdk.org> wrote:

>>> why I'm asking for more asserts that at least block some wrong usages 
>> 
>> Ok. As I said earlier, it doesn't look like `dead->is_dead()` would work here. Any other checks you have in mind?
>
> The method only works for data nodes, so I renamed it to `remove_dead_data_node` and added `!dead->is_CFG()` assert (it was already checked, but down the call tree).

Nice, thanks for the update!

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PR Review Comment: https://git.openjdk.org/jdk/pull/25315#discussion_r2502508103