[heap] Parallel newspace evacuation, semispace copy, and compaction \o/

src/heap/spaces.h

Index: src/heap/spaces.h
diff --git a/src/heap/spaces.h b/src/heap/spaces.h
index 532c9b2e878f2cad7e1a3dc3d2c67ae6443d5490..9f51338b22d75e7cfc0d4e10b7e10c29695b2c25 100644
--- a/src/heap/spaces.h
+++ b/src/heap/spaces.h
@@ -12,6 +12,7 @@
 #include "src/base/platform/mutex.h"
 #include "src/flags.h"
 #include "src/hashmap.h"
+#include "src/heap/store-buffer.h"
 #include "src/list.h"
 #include "src/objects.h"
 #include "src/utils.h"
@@ -2996,6 +2997,8 @@ class CompactionSpaceCollection : public Malloced {
   explicit CompactionSpaceCollection(Heap* heap)
       : old_space_(heap, OLD_SPACE, Executability::NOT_EXECUTABLE),
         code_space_(heap, CODE_SPACE, Executability::EXECUTABLE),
+        local_pretenuring_feedback_(HashMap::PointersMatch,
+                                    kInitialLocalPretenuringFeedbackCapacity),
         duration_(0.0),
         bytes_compacted_(0) {}
 
@@ -3019,10 +3022,16 @@ class CompactionSpaceCollection : public Malloced {
 
   double duration() const { return duration_; }
   intptr_t bytes_compacted() const { return bytes_compacted_; }
+  HashMap* local_pretenuring_feedback() { return &local_pretenuring_feedback_; }
+  LocalStoreBuffer* local_store_buffer() { return &local_store_buffer_; }
 
  private:
+  static const int kInitialLocalPretenuringFeedbackCapacity = 256;
+
   CompactionSpace old_space_;
   CompactionSpace code_space_;
+  HashMap local_pretenuring_feedback_;
+  LocalStoreBuffer local_store_buffer_;
 
   // Book keeping.
   double duration_;