RFR: Expand LRB after compare-and-swap in C2 not in assembler

[Aleksey Shipilev]

On 2/21/19 5:49 PM, Roman Kennke wrote:
> This removes one TODO-item from the LRB patch and moves the LRB from
> assembler into C2 ideal graph. It should also fix one failure we've seen
> in CI, which complained about missing LRB after CAE.
> 
> http://cr.openjdk.java.net/~rkennke/lrb-cae/webrev.00/

Looks good to me.

So, expansion just works when you put ShenandoahLoadReferenceBarrierNode in the graph?

-Aleksey