RFR: 8293351: Add second tmp register to aarch64 BarrierSetAssembler::load_at [v2]

[Thomas Schatzl]

On Mon, 5 Sep 2022 12:49:14 GMT, Axel Boldt-Christmas <aboldtch at openjdk.org> wrote:

>> Add a second tmp register to the BarrierSetAssembler::load_at GC API for aarch64.
>> 
>> Today G1 and Shenandoah uses a second temporary register. This will also be the case for generational ZGC.
>> 
>> Testing: Oracle platforms tier 1-3
>
> Axel Boldt-Christmas has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix argument names

Marked as reviewed by tschatzl (Reviewer).

-------------

PR: https://git.openjdk.org/jdk/pull/10161