hg: jdk/sandbox: 8231410: Shenandoah: clone barrier should use base pointer

[chris.hegarty at oracle.com]

Changeset: c7d9df2e470c
Author:    shade
Date:      2019-09-25 12:21 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/c7d9df2e470c

8231410: Shenandoah: clone barrier should use base pointer
Reviewed-by: rkennke

! src/hotspot/share/gc/shenandoah/c2/shenandoahBarrierSetC2.cpp
! src/hotspot/share/gc/shenandoah/shenandoahRuntime.cpp
! src/hotspot/share/gc/shenandoah/shenandoahRuntime.hpp
+ test/hotspot/jtreg/gc/shenandoah/compiler/TestClone.java