--- old/src/hotspot/share/gc/g1/heapRegionType.cpp	2018-10-05 11:10:59.334576900 -0700
+++ new/src/hotspot/share/gc/g1/heapRegionType.cpp	2018-10-05 11:10:58.492961900 -0700
@@ -34,6 +34,7 @@
     case StartsHumongousTag:
     case ContinuesHumongousTag:
     case OldTag:
+    case PreMatureOldTag:
     case OpenArchiveTag:
     case ClosedArchiveTag:
       return true;
@@ -51,6 +52,7 @@
     case StartsHumongousTag:    return "HUMS";
     case ContinuesHumongousTag: return "HUMC";
     case OldTag:                return "OLD";
+    case PreMatureOldTag:       return "PMOLD";
     case OpenArchiveTag:        return "OARC";
     case ClosedArchiveTag:      return "CARC";
     default:
@@ -68,6 +70,7 @@
     case StartsHumongousTag:    return "HS";
     case ContinuesHumongousTag: return "HC";
     case OldTag:                return "O";
+    case PreMatureOldTag:       return "PO";
     case OpenArchiveTag:        return "OA";
     case ClosedArchiveTag:      return "CA";
     default:
@@ -85,6 +88,7 @@
     case StartsHumongousTag:    return G1HeapRegionTraceType::StartsHumongous;
     case ContinuesHumongousTag: return G1HeapRegionTraceType::ContinuesHumongous;
     case OldTag:                return G1HeapRegionTraceType::Old;
+    case PreMatureOldTag:       return G1HeapRegionTraceType::PreMatureOld;
     case OpenArchiveTag:        return G1HeapRegionTraceType::OpenArchive;
     case ClosedArchiveTag:      return G1HeapRegionTraceType::ClosedArchive;
     default: