src/hotspot/share/gc/g1/g1FullGCPrepareTask.cpp

@@ -102,20 +102,27 @@
    _collector(collector),
    _bitmap(collector->mark_bitmap()),
    _cp(cp) { }
  
  
- G1FullGCPrepareTask::G1PrepareCompactLiveClosure::G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp) :
+ template <bool ALT_FWD>
+ G1FullGCPrepareTask::G1PrepareCompactLiveClosure<ALT_FWD>::G1PrepareCompactLiveClosure(G1FullGCCompactionPoint* cp) :
      _cp(cp) { }
  
- size_t G1FullGCPrepareTask::G1PrepareCompactLiveClosure::apply(oop object) {
+ template <bool ALT_FWD>
+ size_t G1FullGCPrepareTask::G1PrepareCompactLiveClosure<ALT_FWD>::apply(oop object) {
    size_t size = object->size();
-   _cp->forward(object, size);
+   _cp->forward<ALT_FWD>(object, size);
    return size;
  }
  
  void G1FullGCPrepareTask::G1CalculatePointersClosure::prepare_for_compaction(HeapRegion* hr) {
    if (!_collector->is_free(hr->hrm_index())) {
-     G1PrepareCompactLiveClosure prepare_compact(_cp);
-     hr->apply_to_marked_objects(_bitmap, &prepare_compact);
+     if (UseAltGCForwarding) {
+       G1PrepareCompactLiveClosure<true> prepare_compact(_cp);
+       hr->apply_to_marked_objects(_bitmap, &prepare_compact);
+     } else {
+       G1PrepareCompactLiveClosure<false> prepare_compact(_cp);
+       hr->apply_to_marked_objects(_bitmap, &prepare_compact);
+     }
    }
  }