hg: shenandoah/jdk9/hotspot: replace barrier's input with barrier's output in all dominated uses to decrease pressure on register allocator

[rwestrel at redhat.com]

Changeset: 577da6ba5a48
Author:    roland
Date:      2016-12-02 16:49 +0100
URL:       http://hg.openjdk.java.net/shenandoah/jdk9/hotspot/rev/577da6ba5a48

replace barrier's input with barrier's output in all dominated uses to decrease pressure on register allocator

! src/share/vm/gc/shenandoah/shenandoahHeap.cpp
! src/share/vm/gc/shenandoah/shenandoahHeap.hpp
! src/share/vm/opto/block.hpp
! src/share/vm/opto/lcm.cpp
! src/share/vm/opto/loopnode.hpp
! src/share/vm/opto/shenandoahSupport.cpp