hg: jdk9/hs-comp/hotspot: 8135157: DMB elimination in AArch64 C2 synchronization implementation

[aph at redhat.com]

Changeset: 2e58b602c89b
Author:    aph
Date:      2015-09-08 14:08 +0100
URL:       http://hg.openjdk.java.net/jdk9/hs-comp/hotspot/rev/2e58b602c89b

8135157: DMB elimination in AArch64 C2 synchronization implementation
Summary: Reduce memory barrier usage in C2 fast lock and unlock.
Reviewed-by: kvn
Contributed-by: wei.tang at linaro.org, aph at redhat.com

! src/cpu/aarch64/vm/aarch64.ad
! src/cpu/aarch64/vm/macroAssembler_aarch64.hpp