RFR: Fix LRB use in LIRGenerator::do_UnsafeGetAndSetObject (Aarch64 attendum)

[Aleksey Shipilev]

On 2/28/20 1:21 PM, Roman Kennke wrote:
> This fixes the same C1 getAndSetObject() problem that Aleksey recently
> fixed in x86, but for aarch64:
> 
> http://cr.openjdk.java.net/~rkennke/shjdk8-aarch64-xchg/webrev.00/

You sure the destination is on the right? This is the same C1 LIR, so it should match x86? If so,
looks good.

It is "addendum". Better yet:
 AArch64: Fix LRB use in LIRGenerator::do_UnsafeGetAndSetObject

-- 
Thanks,
-Aleksey