Special case the recording of constant pool entries in the slot buffer.

src/mark-compact.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 279 matching lines @@
   }
 
   void Add(ObjectSlot slot) {
     ASSERT(0 <= idx_ && idx_ < kNumberOfElements);
     slots_[idx_++] = slot;
   }
 
   enum SlotType {
     EMBEDDED_OBJECT_SLOT,
     RELOCATED_CODE_OBJECT,
-    CODE_TARGET_SLOT,
+    CODE_TARGET_RELOC_INFO_SLOT,
+    CODE_TARGET_CONSTANT_POOL_SLOT,
     CODE_ENTRY_SLOT,
     DEBUG_TARGET_SLOT,
     JS_RETURN_SLOT,
     NUMBER_OF_SLOT_TYPES
   };
 
   static const char* SlotTypeToString(SlotType type) {
     switch (type) {
       case EMBEDDED_OBJECT_SLOT:
         return "EMBEDDED_OBJECT_SLOT";
       case RELOCATED_CODE_OBJECT:
         return "RELOCATED_CODE_OBJECT";
-      case CODE_TARGET_SLOT:
-        return "CODE_TARGET_SLOT";
+      case CODE_TARGET_RELOC_INFO_SLOT:
+        return "CODE_TARGET_RELOC_INFO_SLOT";
+      case CODE_TARGET_CONSTANT_POOL_SLOT:
+        return "CODE_TARGET_CONSTANT_POOL_SLOT";
       case CODE_ENTRY_SLOT:
         return "CODE_ENTRY_SLOT";
       case DEBUG_TARGET_SLOT:
         return "DEBUG_TARGET_SLOT";
       case JS_RETURN_SLOT:
         return "JS_RETURN_SLOT";
       case NUMBER_OF_SLOT_TYPES:
         return "NUMBER_OF_SLOT_TYPES";
     }
     return "UNKNOWN SlotType";
@@ skipping 707 matching lines @@
  private:
   MarkCompactCollector* collector_;
 };
 
 
 const char* AllocationSpaceName(AllocationSpace space);
 
 } }  // namespace v8::internal
 
 #endif  // V8_MARK_COMPACT_H_