hg: shenandoah/jdk: Eliminate LoadAddr edge from LoadReferenceBarrier

[rkennke at redhat.com]

Changeset: 0b8d37a15d85
Author:    rkennke
Date:      2019-07-02 20:13 +0200
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/0b8d37a15d85

Eliminate LoadAddr edge from LoadReferenceBarrier

! src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp
! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp
! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.hpp