[aarch64-port-dev ] hg: aarch64-port/jdk8/hotspot: Backport optimization of volatile puts/gets and CAS to use ldar/stlr

[adinn at redhat.com]

Changeset: 3ccdd3482827
Author:    adinn
Date:      2015-10-08 11:06 -0400
URL:       http://hg.openjdk.java.net/aarch64-port/jdk8/hotspot/rev/3ccdd3482827

Backport optimization of volatile puts/gets and CAS to use ldar/stlr

! src/cpu/aarch64/vm/aarch64.ad
! src/cpu/aarch64/vm/globals_aarch64.hpp
! src/cpu/aarch64/vm/macroAssembler_aarch64.cpp
! src/cpu/aarch64/vm/macroAssembler_aarch64.hpp
! src/cpu/aarch64/vm/vm_version_aarch64.cpp
! src/share/vm/opto/graphKit.cpp