On Thu, 27 Apr 2023 04:49:10 GMT, David Holmes <dhol...@openjdk.org> wrote:
>> This change moves the flags from AccessFlags to either ConstMethodFlags or
>> MethodFlags, depending on whether they are set at class file parse time,
>> which makes them essentially const, or at runtime, which makes them needing
>> atomic access.
>>
>> This leaves AccessFlags int size because Klass still has JVM flags that are
>> more work to move, but this change doesn't increase Method size. I didn't
>> remove JVM_RECOGNIZED_METHOD_MODIFIERS with this change since there are
>> several of these in other places, and with this change the code is benign.
>>
>> Tested with tier1-6, and some manual verification of printing.
>
> src/hotspot/share/oops/method.hpp line 871:
>
>> 869: void clear_not_c2_compilable() {
>> set_not_c2_compilable(false); }
>> 870:
>> 871: bool is_not_c1_osr_compilable() const { return
>> not_c1_compilable(); } // don't waste a flags bit
>
> Again inconsistent naming with `is` but also `osr` in this case. I would
> expect being compilable to be quite different to being "osr compilable".
Ah I get this bit now - but the comment didn't make it clear. For C1 compilable
and osr-compilable are considered the same.
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PR Review Comment: https://git.openjdk.org/jdk/pull/13654#discussion_r1178623386
