RFR: 8294359: Interpreter(AArch64) intrinsify Thread.currentThread()

[Aleksey Shipilev]

On Tue, 27 Sep 2022 09:09:05 GMT, Hao Sun <haosun at openjdk.org> wrote:

> JDK-8278793 supported Thread.currentThread() intrinsification for interpreter(x64) part so as to get JVM startup benefit.
> 
> In this patch, we implement the AArch64 part.
> 
> Testings: tier1~3 and jdk_loom passed on Linux/AArch64.

Looks fine. (I had to look up definitions for `rscratch1` and `rscratch2` to make sure they do not collide with `r0`)

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Marked as reviewed by shade (Reviewer).

PR: https://git.openjdk.org/jdk/pull/10441