Generate StoreGlobal stubs with Hydrogen

src/hydrogen-instructions.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 3293 matching lines @@
     ASSERT(unique_id_ != UniqueValueId(heap->minus_zero_value()));
     ASSERT(unique_id_ != UniqueValueId(heap->nan_value()));
     return unique_id_ == UniqueValueId(heap->undefined_value()) ||
            unique_id_ == UniqueValueId(heap->null_value()) ||
            unique_id_ == UniqueValueId(heap->true_value()) ||
            unique_id_ == UniqueValueId(heap->false_value()) ||
            unique_id_ == UniqueValueId(heap->the_hole_value()) ||
            unique_id_ == UniqueValueId(heap->empty_string());
   }
 
+  bool IsCell() const {
+    return is_cell_;
+  }
+
   virtual Representation RequiredInputRepresentation(int index) {
     return Representation::None();
   }
 
   virtual Representation KnownOptimalRepresentation() {
     if (HasSmiValue()) return Representation::Smi();
     if (HasInteger32Value()) return Representation::Integer32();
     if (HasNumberValue()) return Representation::Double();
     return Representation::Tagged();
   }
 
-  virtual bool EmitAtUses() { return !representation().IsDouble(); }
+  virtual bool EmitAtUses();
   virtual void PrintDataTo(StringStream* stream);
   virtual HType CalculateInferredType();
   bool IsInteger() { return handle()->IsSmi(); }
   HConstant* CopyToRepresentation(Representation r, Zone* zone) const;
   HConstant* CopyToTruncatedInt32(Zone* zone) const;
   bool HasInteger32Value() const { return has_int32_value_; }
   int32_t Integer32Value() const {
     ASSERT(HasInteger32Value());
     return int32_value_;
   }
@@ skipping 94 matching lines @@
   // We store the HConstant in the most specific form safely possible.
   // The two flags, has_int32_value_ and has_double_value_ tell us if
   // int32_value_ and double_value_ hold valid, safe representations
   // of the constant.  has_int32_value_ implies has_double_value_ but
   // not the converse.
   bool has_smi_value_ : 1;
   bool has_int32_value_ : 1;
   bool has_double_value_ : 1;
   bool is_internalized_string_ : 1;  // TODO(yangguo): make this part of HType.
   bool is_not_in_new_space_ : 1;
+  bool is_cell_ : 1;
   bool boolean_value_ : 1;
   int32_t int32_value_;
   double double_value_;
   HType type_from_value_;
 };
 
 
 class HBinaryOperation: public HTemplateInstruction<3> {
  public:
   HBinaryOperation(HValue* context, HValue* left, HValue* right)
@@ skipping 1632 matching lines @@
 }
 
 
 inline bool ReceiverObjectNeedsWriteBarrier(HValue* object,
                                             HValue* new_space_dominator) {
   if (object->IsInnerAllocatedObject()) {
     return ReceiverObjectNeedsWriteBarrier(
         HInnerAllocatedObject::cast(object)->base_object(),
         new_space_dominator);
   }
+  if (object->IsConstant() && HConstant::cast(object)->IsCell()) {
+    return false;
+  }
   if (object != new_space_dominator) return true;
   if (object->IsAllocateObject()) return false;
   if (object->IsAllocate()) {
     return !HAllocate::cast(object)->GuaranteedInNewSpace();
   }
   return true;
 }
 
 
 class HStoreGlobalCell: public HUnaryOperation {
@@ skipping 241 matching lines @@
   // Create an access to an in-object property in a JSArray.
   static HObjectAccess ForJSArrayOffset(int offset);
 
   // Create an access to the backing store of an object.
   static HObjectAccess ForBackingStoreOffset(int offset);
 
   // Create an access to a resolved field (in-object or backing store).
   static HObjectAccess ForField(Handle<Map> map,
       LookupResult *lookup, Handle<String> name = Handle<String>::null());
 
+  // Create an access for the payload of a Cell or JSGlobalPropertyCell.
+  static HObjectAccess ForCellPayload(Isolate* isolate);
+
   void PrintTo(StringStream* stream);
 
   inline bool Equals(HObjectAccess that) const {
     return value_ == that.value_;  // portion and offset must match
   }
 
  protected:
   void SetGVNFlags(HValue *instr, bool is_store);
 
  private:
@@ skipping 1278 matching lines @@
   virtual bool IsDeletable() const { return true; }
 };
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_