src/hotspot/share/gc/g1/g1Policy.hpp

rev 55208 : imported patch 8220089.webrev.0
rev 55209 : imported patch 8220089.webrev.1
rev 55210 : imported patch 8220089.webrev.2

@@ -123,10 +123,18 @@
   void set_region_eden(HeapRegion* hr) {
     hr->set_eden();
     hr->install_surv_rate_group(_short_lived_surv_rate_group);
   }
 
+  void set_region_eden_from_survivor(HeapRegion* hr) {
+    hr->set_eden_pre_gc();
+
+    // The given heap region does not yet have a survivor surv rate group. So no need
+    // to uninstall it, but need to install eden surv rate group via retained version.
+    hr->install_surv_rate_group_for_retained(_short_lived_surv_rate_group);
+  }
+
   void set_region_survivor(HeapRegion* hr) {
     assert(hr->is_survivor(), "pre-condition");
     hr->install_surv_rate_group(_survivor_surv_rate_group);
   }