RFR: Eliminate LoadAddr edge from LoadReferenceBarrier

[Aleksey Shipilev]

On 7/2/19 8:47 PM, Roman Kennke wrote:
> In the initial implementation of self-fixing LRB, I added an edge to
> ShenandoahLoadReferenceBarrierNode to carry the load-address. Roland
> pointed out that we could instead determine the load-address at
> LRB-expansion-time and simplify the code. That's what this patch does:
> 
> http://cr.openjdk.java.net/~rkennke/sfx-loadaddr/webrev.00/

Cute. Good to go to sh/jdk.

-- 
Thanks,
-Aleksey