hg: shenandoah/jdk9/hotspot: PhaseCFG::replace_uses_with_shenandoah_barrier() causes incorrect execution on aarch64

[rwestrel at redhat.com]

Changeset: bfa281f27d71
Author:    roland
Date:      2017-01-13 10:23 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/bfa281f27d71

PhaseCFG::replace_uses_with_shenandoah_barrier() causes incorrect execution on aarch64

! src/share/vm/opto/shenandoahSupport.cpp