--- old/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2020-02-14 18:02:37.139594322 +0100
+++ new/src/hotspot/share/gc/g1/g1ConcurrentMark.cpp	2020-02-14 18:02:36.927591376 +0100
@@ -261,16 +261,12 @@
 }
 
 G1CMRootMemRegions::G1CMRootMemRegions(uint const max_regions) :
-    _root_regions(NEW_C_HEAP_ARRAY(MemRegion, max_regions, mtGC)),
+    _root_regions(MemRegion::create(max_regions, mtGC)),
     _max_regions(max_regions),
     _num_root_regions(0),
     _claimed_root_regions(0),
     _scan_in_progress(false),
-    _should_abort(false) {
-  for (uint i = 0; i < max_regions; i++) {
-    ::new (&_root_regions[i]) MemRegion();
-  }
-}
+    _should_abort(false) { }
 
 G1CMRootMemRegions::~G1CMRootMemRegions() {
   FREE_C_HEAP_ARRAY(MemRegion, _root_regions);
--- old/src/hotspot/share/gc/shared/cardTable.cpp	2020-02-14 18:02:37.767603044 +0100
+++ new/src/hotspot/share/gc/shared/cardTable.cpp	2020-02-14 18:02:37.567600266 +0100
@@ -51,19 +51,14 @@
   _byte_map(NULL),
   _byte_map_base(NULL),
   _cur_covered_regions(0),
-  _covered(NEW_C_HEAP_ARRAY(MemRegion, _max_covered_regions, mtGC)),
-  _committed(NEW_C_HEAP_ARRAY(MemRegion, _max_covered_regions, mtGC)),
+  _covered(MemRegion::create(_max_covered_regions, mtGC)),
+  _committed(MemRegion::create(_max_covered_regions, mtGC)),
   _guard_region()
 {
   assert((uintptr_t(_whole_heap.start())  & (card_size - 1))  == 0, "heap must start at card boundary");
   assert((uintptr_t(_whole_heap.end()) & (card_size - 1))  == 0, "heap must end at card boundary");
 
   assert(card_size <= 512, "card_size must be less than 512"); // why?
-
-  for (int i = 0; i < _max_covered_regions; i++) {
-    ::new (&_covered[i]) MemRegion();
-    ::new (&_committed[i]) MemRegion();
-  }
 }
 
 CardTable::~CardTable() {
--- old/src/hotspot/share/memory/filemap.cpp	2020-02-14 18:02:38.343611045 +0100
+++ new/src/hotspot/share/memory/filemap.cpp	2020-02-14 18:02:38.127608045 +0100
@@ -1747,10 +1747,7 @@
 
 bool FileMapInfo::map_heap_data(MemRegion **heap_mem, int first,
                                 int max, int* num, bool is_open_archive) {
-  MemRegion* regions = NEW_C_HEAP_ARRAY(MemRegion, max, mtInternal);
-  for (int i = 0; i < max; i++) {
-    ::new (&regions[i]) MemRegion();
-  }
+  MemRegion* regions = MemRegion::create(max, mtInternal);
   FileMapRegion* si;
   int region_num = 0;
 
--- old/src/hotspot/share/memory/memRegion.cpp	2020-02-14 18:02:38.955619545 +0100
+++ new/src/hotspot/share/memory/memRegion.cpp	2020-02-14 18:02:38.747616657 +0100
@@ -101,3 +101,11 @@
   ShouldNotReachHere();
   return MemRegion();
 }
+
+MemRegion* MemRegion::create(uint length, MEMFLAGS flags) {
+  MemRegion* result = NEW_C_HEAP_ARRAY(MemRegion, length, flags);
+  for (uint i = 0; i < length; i++) {
+    ::new (&result[i]) MemRegion();
+  }
+  return result;
+}
--- old/src/hotspot/share/memory/memRegion.hpp	2020-02-14 18:02:39.535627602 +0100
+++ new/src/hotspot/share/memory/memRegion.hpp	2020-02-14 18:02:39.323624659 +0100
@@ -92,6 +92,9 @@
   size_t word_size() const { return _word_size; }
 
   bool is_empty() const { return word_size() == 0; }
+
+  // Creates and initializes an array of MemRegions of the given length.
+  static MemRegion* create(uint length, MEMFLAGS flags);
 };
 
 // For iteration over MemRegion's.