--- old/src/hotspot/share/gc/parallel/psParallelCompact.cpp	2019-12-04 16:33:55.660290639 +0100
+++ new/src/hotspot/share/gc/parallel/psParallelCompact.cpp	2019-12-04 16:33:55.448289722 +0100
@@ -2978,7 +2978,7 @@
         // fills the shadow region will copy the data back (see
         // MoveAndUpdateShadowClosure::complete_region).
         copy_back(sd.region_to_addr(cur->shadow_region()), sd.region_to_addr(cur));
-        cm->push_shadow_region_mt_safe(cur->shadow_region());
+        ParCompactionManager::push_shadow_region_mt_safe(cur->shadow_region());
         cur->set_completed();
       }
     }
@@ -3174,7 +3174,7 @@
   // The InvalidShadow return value indicates the corresponding heap region is available,
   // so use MoveAndUpdateClosure to fill the normal region. Otherwise, use
   // MoveAndUpdateShadowClosure to fill the acquired shadow region.
-  if (shadow_region == cm->InvalidShadow) {
+  if (shadow_region == ParCompactionManager::InvalidShadow) {
     MoveAndUpdateClosure cl(mark_bitmap(), cm, region_idx);
     region_ptr->shadow_to_normal();
     return fill_region(cm, cl, region_idx);
@@ -3402,7 +3402,7 @@
   if (((region_ptr->available() && region_ptr->claim()) || region_ptr->claimed()) && region_ptr->mark_copied()) {
     region_ptr->set_completed();
     PSParallelCompact::copy_back(PSParallelCompact::summary_data().region_to_addr(_shadow), dest_addr);
-    cm->push_shadow_region_mt_safe(_shadow);
+    ParCompactionManager::push_shadow_region_mt_safe(_shadow);
   }
 }