RFR: 8370112: Remove VM_Version::supports_fast_class_init_checks() in platform-specific code

[David Holmes]

On Mon, 19 Jan 2026 08:08:16 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

>> Please review this simple enhancement to remove runtime checks for `VM_Version::supports_fast_class_init_checks()` in platform specific code, and replace them with asserts - as we know statically whether a given platform supports it.
>> 
>> The changes are the same for each platform.
>> 
>> Testing
>>  - building all platforms via GHA
>>  - tiers 1-3 (sanity)
>> 
>> Thanks
>
> src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp line 728:
> 
>> 726:   Label L_skip_barrier;
>> 727: 
>> 728:   { // Bypass the barrier for non-static methods
> 
> Not entirely sure what extra `{ ... }` block is supposed to do here. Since you are changing these lines, maybe collapse it one indenting level down?

I can't see what the block does either - may be a relic from some older code. The same pattern is in most of the files. I can take it out.

Thanks for looking at this @shipilev !

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PR Review Comment: https://git.openjdk.org/jdk/pull/29293#discussion_r2704418453