RFR: 8352565: Add native method implementation of Reference.get() [v10]

[Kim Barrett]

On Wed, 4 Jun 2025 17:39:55 GMT, Chen Liang <liach at openjdk.org> wrote:

>> Kim Barrett has updated the pull request incrementally with two additional commits since the last revision:
>> 
>>  - add pseudo-native entry for Reference.get0
>>  - tidy CallGenerator lookup in Compile ctor
>
> src/hotspot/share/opto/compile.cpp line 786:
> 
>> 784:       initial_gvn()->set_type_bottom(s);
>> 785:       verify_start(s);
>> 786:       if (method()->intrinsic_id() == vmIntrinsics::_Reference_get) {
> 
> Should we remove this now or as part of the redundant intrinsic cleanup for interpreter and c1? I see the interpreter is now kept intact.

I'm planning to remove the interpreter intrinsic as a followup. I couldn't
figure out how to hit this after making Reference::get0 the intrinsic.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24315#discussion_r2131561433