--- old/src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.inline.hpp	2019-11-21 11:54:13.135987946 +0100
+++ new/src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.inline.hpp	2019-11-21 11:54:12.879983616 +0100
@@ -145,8 +145,8 @@
 
 template <DecoratorSet decorators, typename BarrierSetT>
 template <typename T>
-inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_not_in_heap(oop new_value, T* addr) {
-  oop previous = Raw::oop_atomic_xchg(new_value, addr);
+inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_not_in_heap(T* addr, oop new_value) {
+  oop previous = Raw::oop_atomic_xchg(addr, new_value);
   if (previous != NULL) {
     return ShenandoahBarrierSet::barrier_set()->load_reference_barrier_not_null(previous);
   } else {
@@ -156,9 +156,9 @@
 
 template <DecoratorSet decorators, typename BarrierSetT>
 template <typename T>
-inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_impl(oop new_value, T* addr) {
+inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_impl(T* addr, oop new_value) {
   ShenandoahBarrierSet::barrier_set()->storeval_barrier(new_value);
-  oop result = oop_atomic_xchg_not_in_heap(new_value, addr);
+  oop result = oop_atomic_xchg_not_in_heap(addr, new_value);
   const bool keep_alive = (decorators & AS_NO_KEEPALIVE) == 0;
   if (keep_alive && ShenandoahSATBBarrier && !CompressedOops::is_null(result) &&
       ShenandoahHeap::heap()->is_concurrent_mark_in_progress()) {
@@ -169,15 +169,15 @@
 
 template <DecoratorSet decorators, typename BarrierSetT>
 template <typename T>
-inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap(oop new_value, T* addr) {
-  oop result = oop_atomic_xchg_in_heap_impl(new_value, addr);
+inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap(T* addr, oop new_value) {
+  oop result = oop_atomic_xchg_in_heap_impl(addr, new_value);
   keep_alive_if_weak(addr, result);
   return result;
 }
 
 template <DecoratorSet decorators, typename BarrierSetT>
-inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset) {
-  oop result = oop_atomic_xchg_in_heap_impl(new_value, AccessInternal::oop_field_addr<decorators>(base, offset));
+inline oop ShenandoahBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_at(oop base, ptrdiff_t offset, oop new_value) {
+  oop result = oop_atomic_xchg_in_heap_impl(AccessInternal::oop_field_addr<decorators>(base, offset), new_value);
   keep_alive_if_weak(AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset), result);
   return result;
 }