Generate StoreGlobal stubs with Hydrogen

src/objects.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 8567 matching lines @@
 class PropertyCell: public Cell {
  public:
   // [type]: type of the global property.
   Type* type();
   void set_type(Type* value, WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
 
   // [dependent_code]: dependent code that depends on the type of the global
   // property.
   DECL_ACCESSORS(dependent_code, DependentCode)
 
+  // Sets the value of the cell and updates the type field to be the union
+  // of the cell's current type and the value's type. If the change causes
+  // a change of the type of the cell's contents, code dependent on the cell
+  // will be deoptimized.
+  void SetValueInferType(Object* value,
+                         WriteBarrierMode mode = UPDATE_WRITE_BARRIER);
+
   // Casting.
   static inline PropertyCell* cast(Object* obj);
 
   inline Address TypeAddress() {
     return address() + kTypeOffset;
   }
 
   // Dispatched behavior.
   DECLARE_PRINTER(PropertyCell)
   DECLARE_VERIFIER(PropertyCell)
 
   // Layout description.
   static const int kTypeOffset = kValueOffset + kPointerSize;
   static const int kDependentCodeOffset = kTypeOffset + kPointerSize;
   static const int kSize = kDependentCodeOffset + kPointerSize;
 
   static const int kPointerFieldsBeginOffset = kValueOffset;
   static const int kPointerFieldsEndOffset = kDependentCodeOffset;
 
   typedef FixedBodyDescriptor<kValueOffset,
                               kSize,
                               kSize> BodyDescriptor;
 
   void AddDependentCompilationInfo(CompilationInfo* info);
 
   void AddDependentCode(Handle<Code> code);
 
+  Type* UpdateType(Object* value);
+
  private:
   DECL_ACCESSORS(type_raw, Object)
   DISALLOW_IMPLICIT_CONSTRUCTORS(PropertyCell);
 };
 
 
 // The JSProxy describes EcmaScript Harmony proxies
 class JSProxy: public JSReceiver {
  public:
   // [handler]: The handler property.
@@ skipping 1120 matching lines @@
     } else {
       value &= ~(1 << bit_position);
     }
     return value;
   }
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_H_