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

[Vladimir Ivanov]

On Thu, 30 Oct 2025 12:49:09 GMT, Emanuel Peter <epeter at openjdk.org> wrote:

>> Vladimir Ivanov has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix merge
>
> src/hotspot/share/opto/c2_globals.hpp line 86:
> 
>> 84:                                                                             \
>> 85:   product(bool, StressReachabilityFences, false, DIAGNOSTIC,                \
>> 86:           "Aggressively insert reachability fences for all oop arguments")  \
> 
> It could be nice if you gave some more detail here, what these flags do.

I slightly reworded the comments. But it doesn't look like a good place to dive into the details.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25315#discussion_r2501862667