--- a/src/hotspot/share/gc/g1/g1BarrierSet.inline.hpp	Tue Jun 12 14:08:24 2018 -0700
+++ b/src/hotspot/share/gc/g1/g1BarrierSet.inline.hpp	Tue Jun 12 18:12:59 2018 -0400
@@ -54,15 +54,14 @@
   }
 }
 
-inline void G1BarrierSet::enqueue_if_weak_or_archive(DecoratorSet decorators, oop value) {
+inline void G1BarrierSet::enqueue_if_weak(DecoratorSet decorators, oop value) {
   assert((decorators & ON_UNKNOWN_OOP_REF) == 0, "Reference strength must be known");
-  // Archive roots need to be enqueued since they add subgraphs to the
-  // Java heap that were not there at the snapshot when marking started.
-  // Weak and phantom references also need enqueueing for similar reasons.
-  const bool in_archive_root   = (decorators & IN_ARCHIVE_ROOT) != 0;
+  // Loading from a weak or phantom reference needs enqueueing, as
+  // the object may not have been reachable (part of the snapshot)
+  // when marking started.
   const bool on_strong_oop_ref = (decorators & ON_STRONG_OOP_REF) != 0;
   const bool peek              = (decorators & AS_NO_KEEPALIVE) != 0;
-  const bool needs_enqueue     = in_archive_root || (!peek && !on_strong_oop_ref);
+  const bool needs_enqueue     = (!peek && !on_strong_oop_ref);
 
   if (needs_enqueue && value != NULL) {
     enqueue(value);
@@ -74,7 +73,7 @@
 inline oop G1BarrierSet::AccessBarrier<decorators, BarrierSetT>::
 oop_load_not_in_heap(T* addr) {
   oop value = ModRef::oop_load_not_in_heap(addr);
-  enqueue_if_weak_or_archive(decorators, value);
+  enqueue_if_weak(decorators, value);
   return value;
 }
 
@@ -83,7 +82,7 @@
 inline oop G1BarrierSet::AccessBarrier<decorators, BarrierSetT>::
 oop_load_in_heap(T* addr) {
   oop value = ModRef::oop_load_in_heap(addr);
-  enqueue_if_weak_or_archive(decorators, value);
+  enqueue_if_weak(decorators, value);
   return value;
 }
 
@@ -91,7 +90,7 @@
 inline oop G1BarrierSet::AccessBarrier<decorators, BarrierSetT>::
 oop_load_in_heap_at(oop base, ptrdiff_t offset) {
   oop value = ModRef::oop_load_in_heap_at(base, offset);
-  enqueue_if_weak_or_archive(AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset), value);
+  enqueue_if_weak(AccessBarrierSupport::resolve_possibly_unknown_oop_ref_strength<decorators>(base, offset), value);
   return value;
 }