RFR 8233165: Shenandoah:SBSA::gen_load_reference_barrier_stub() should use pointer register for address on aarch64

[Zhengyu Gu]

Thanks for the review, and pushed.

-Zhengyu

On 10/30/19 9:40 AM, Roman Kennke wrote:
> Nice.
> 
> Please push the fix.
> 
> Thanks,
> Roman
> 
>> The load address can come in in single-size or double-size register,
>> as_pointer_register() can deal with both case.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8233165
>> Webrev: http://cr.openjdk.java.net/~zgu/JDK-8233165/webrev.00/
>>
>> Test:
>>    hotspot_gc_shenandoah (fastdebug and release)
>>    jcstress quick tests (fastdebug and release)
>>    on aarch64 Linux
>>
>> Thanks,
>>
>> -Zhengyu
>>
>