RFR: 8242301: Shenandoah: Inline LRB runtime call

[Zhengyu Gu]

Looks good.

-Zhengyu


On 4/7/20 4:06 PM, Roman Kennke wrote:
> Currently, the LRB slow-path call does 2-3 calls in a row:
> compiled code -> runtime entry
> runtime entry -> ShBS::load_reference_barrier_mutator()
> ShBS::lrb_mutator() -> ShBS::lrb_mutator_work()
> 
> The first in unavoidable, but none of the other two are marked inlined
> and are in a separate compilation-unit. Further, the middle-call is not
> needed. We can call straight from ShRuntime into the templated-inlined
> lrb_mutator() method.
> 
> Issue:
> https://bugs.openjdk.java.net/browse/JDK-8242301
> Webrev:
> http://cr.openjdk.java.net/~rkennke/JDK-8242301/webrev.00/
> 
> Testing: hotspot_gc_shenandoah (fastdebug/release)
> 
> Ok?
> 
> Roman
>