--- a/src/hotspot/share/gc/g1/g1GCPhaseTimes.hpp	Wed Jul 24 11:49:39 2019 +0200
+++ b/src/hotspot/share/gc/g1/g1GCPhaseTimes.hpp	Wed Jul 24 11:49:39 2019 +0200
@@ -100,6 +100,11 @@
     ScanHRUsedMemory
   };
 
+  enum GCMergeHCCWorkItems {
+    MergeHCCDirtyCards,
+    MergeHCCSkippedCards
+  };
+
   enum GCMergeLBWorkItems {
     MergeLBProcessedBuffers,
     MergeLBDirtyCards,
@@ -121,6 +126,9 @@
   WorkerDataArray<size_t>* _merge_rs_merged_fine;
   WorkerDataArray<size_t>* _merge_rs_merged_coarse;
 
+  WorkerDataArray<size_t>* _merge_hcc_dirty_cards;
+  WorkerDataArray<size_t>* _merge_hcc_skipped_cards;
+
   WorkerDataArray<size_t>* _merge_lb_processed_buffers;
   WorkerDataArray<size_t>* _merge_lb_dirty_cards;
   WorkerDataArray<size_t>* _merge_lb_skipped_cards;