RFR: 8278793: Interpreter(x64) intrinsify Thread.currentThread() [v2]

[Roman Kennke]

On Fri, 17 Dec 2021 12:02:49 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> Please consider this enhancement.
>> This makes Thread.currentThread() eight times faster on my box when running in interpreter.
>> 
>> Passes t1-t4
>> 
>> As suggested I added a related fix to Shenandoah.
>> Shenandoah LB was using InterpreterMacroAssembler version of call_VM_leaf_base (it's virtual).
>> The interpreter version adds a check on last_sp, since the intrinsic is not setting up a new frame, this check is faulty.
>> Other GC seems to always use the base version, so let's use the base version in Shenandoah also.
>> No issues found when locally running gc/shenandoah.
>
> Robbin Ehn has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Use resolve_oop_handle instead

Looks good, thanks!

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Marked as reviewed by rkennke (Reviewer).

PR: https://git.openjdk.java.net/jdk/pull/6833