--- old/src/hotspot/share/gc/z/zBarrierSet.inline.hpp	2019-11-21 11:54:14.880017445 +0100
+++ new/src/hotspot/share/gc/z/zBarrierSet.inline.hpp	2019-11-21 11:54:14.624013114 +0100
@@ -155,20 +155,20 @@
 
 template <DecoratorSet decorators, typename BarrierSetT>
 template <typename T>
-inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap(oop new_value, T* addr) {
+inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap(T* addr, oop new_value) {
   verify_decorators_present<ON_STRONG_OOP_REF>();
   verify_decorators_absent<AS_NO_KEEPALIVE>();
 
-  const oop o = Raw::oop_atomic_xchg_in_heap(new_value, addr);
+  const oop o = Raw::oop_atomic_xchg_in_heap(addr, new_value);
   return ZBarrier::load_barrier_on_oop(o);
 }
 
 template <DecoratorSet decorators, typename BarrierSetT>
-inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_at(oop new_value, oop base, ptrdiff_t offset) {
+inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_in_heap_at(oop base, ptrdiff_t offset, oop new_value) {
   verify_decorators_present<ON_STRONG_OOP_REF>();
   verify_decorators_absent<AS_NO_KEEPALIVE>();
 
-  const oop o = Raw::oop_atomic_xchg_in_heap_at(new_value, base, offset);
+  const oop o = Raw::oop_atomic_xchg_in_heap_at(base, offset, new_value);
   return ZBarrier::load_barrier_on_oop(o);
 }
 
@@ -231,11 +231,11 @@
 
 template <DecoratorSet decorators, typename BarrierSetT>
 template <typename T>
-inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_not_in_heap(oop new_value, T* addr) {
+inline oop ZBarrierSet::AccessBarrier<decorators, BarrierSetT>::oop_atomic_xchg_not_in_heap(T* addr, oop new_value) {
   verify_decorators_present<ON_STRONG_OOP_REF>();
   verify_decorators_absent<AS_NO_KEEPALIVE>();
 
-  return Raw::oop_atomic_xchg_not_in_heap(new_value, addr);
+  return Raw::oop_atomic_xchg_not_in_heap(addr, new_value);
 }
 
 #endif // SHARE_GC_Z_ZBARRIERSET_INLINE_HPP