Revert "Merge old data and pointer space."

src/heap/mark-compact.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_HEAP_MARK_COMPACT_H_
 #define V8_HEAP_MARK_COMPACT_H_
 
 #include "src/base/bits.h"
 #include "src/heap/spaces.h"
 
@@ skipping 585 matching lines @@
     }
 
     // TODO(gc) If all evacuation candidates are too popular we
     // should stop slots recording entirely.
     page->ClearEvacuationCandidate();
 
     // We were not collecting slots on this page that point
     // to other evacuation candidates thus we have to
     // rescan the page after evacuation to discover and update all
     // pointers to evacuated objects.
-    page->SetFlag(Page::RESCAN_ON_EVACUATION);
+    if (page->owner()->identity() == OLD_DATA_SPACE) {
+      evacuation_candidates_.RemoveElement(page);
+    } else {
+      page->SetFlag(Page::RESCAN_ON_EVACUATION);
+    }
   }
 
   void RecordRelocSlot(RelocInfo* rinfo, Object* target);
   void RecordCodeEntrySlot(Address slot, Code* target);
   void RecordCodeTargetPatch(Address pc, Code* target);
 
   INLINE(void RecordSlot(
       Object** anchor_slot, Object** slot, Object* object,
       SlotsBuffer::AdditionMode mode = SlotsBuffer::FAIL_ON_OVERFLOW));
 
@@ skipping 279 matching lines @@
   Heap* heap_;
   base::VirtualMemory* marking_deque_memory_;
   bool marking_deque_memory_committed_;
   MarkingDeque marking_deque_;
   CodeFlusher* code_flusher_;
   bool have_code_to_deoptimize_;
 
   List<Page*> evacuation_candidates_;
   List<Code*> invalidated_code_;
 
-  SmartPointer<FreeList> free_list_old_space_;
+  SmartPointer<FreeList> free_list_old_data_space_;
+  SmartPointer<FreeList> free_list_old_pointer_space_;
 
   friend class Heap;
 };
 
 
 class MarkBitCellIterator BASE_EMBEDDED {
  public:
   explicit MarkBitCellIterator(MemoryChunk* chunk) : chunk_(chunk) {
     last_cell_index_ = Bitmap::IndexToCell(Bitmap::CellAlignIndex(
         chunk_->AddressToMarkbitIndex(chunk_->area_end())));
@@ skipping 45 matching lines @@
  private:
   MarkCompactCollector* collector_;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 }
 }  // namespace v8::internal
 
 #endif  // V8_HEAP_MARK_COMPACT_H_