RFR: JDK-8217016: Shenandoah: Streamline generation of CAS barriers

[Andrew Haley]

On 1/26/19 12:23 AM, Roman Kennke wrote:
> Right. This update implements the same thing in aarch64:
> 
> http://cr.openjdk.java.net/~rkennke/JDK-8217016/webrev.01/
> 
> It causes no regressions in hotspot_gc_shenandoah (we have a few
> failures, but none of them are related to the patch and are pre-existing).
> 
> Good?

I can't make any sense of the code. It looks like we're disabling the generation
of CAS instructions in ShenandoahBarrierSetAssembler::cmpxchg_oop.

-- 
Andrew Haley
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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