Pretenure call new support.

src/ast.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 1822 matching lines @@
 
 class CallNew V8_FINAL : public Expression, public FeedbackSlotInterface {
  public:
   DECLARE_NODE_TYPE(CallNew)
 
   Expression* expression() const { return expression_; }
   ZoneList<Expression*>* arguments() const { return arguments_; }
 
   // Type feedback information.
   virtual ComputablePhase GetComputablePhase() { return DURING_PARSE; }
-  virtual int ComputeFeedbackSlotCount(Isolate* isolate) { return 1; }
+  virtual int ComputeFeedbackSlotCount(Isolate* isolate) {
+    return FLAG_pretenuring_call_new ? 2 : 1;
+  }
   virtual void SetFirstFeedbackSlot(int slot) {
     callnew_feedback_slot_ = slot;
   }
 
   int CallNewFeedbackSlot() {
     ASSERT(callnew_feedback_slot_ != kInvalidFeedbackSlot);
     return callnew_feedback_slot_;
   }
+  int AllocationSiteFeedbackSlot() {
+    ASSERT(callnew_feedback_slot_ != kInvalidFeedbackSlot);
+    ASSERT(FLAG_pretenuring_call_new);
+    return callnew_feedback_slot_ + 1;
+  }
 
-  TypeFeedbackId CallNewFeedbackId() const { return reuse(id()); }
   void RecordTypeFeedback(TypeFeedbackOracle* oracle);
   virtual bool IsMonomorphic() V8_OVERRIDE { return is_monomorphic_; }
   Handle<JSFunction> target() const { return target_; }
   ElementsKind elements_kind() const { return elements_kind_; }
   Handle<AllocationSite> allocation_site() const {
     return allocation_site_;
   }
 
   static int feedback_slots() { return 1; }
 
@@ skipping 1492 matching lines @@
 
  private:
   Zone* zone_;
   Visitor visitor_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_