Both HGlobalObject and HGlobalReceiver can be replaced with HLoadNamedField.

src/hydrogen-instructions.h

Index: src/hydrogen-instructions.h
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index f0b7be20a36b2c26256815736e76cacd1142eda2..68e07d0983989316f1056b7d858ec1ed0854efe5 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -117,8 +117,6 @@ class LChunkBuilder;
   V(ForInPrepareMap)                           \
   V(FunctionLiteral)                           \
   V(GetCachedArrayIndex)                       \
-  V(GlobalObject)                              \
-  V(GlobalReceiver)                            \
   V(Goto)                                      \
   V(HasCachedArrayIndexAndBranch)              \
   V(HasInstanceTypeAndBranch)                  \
@@ -2157,53 +2155,6 @@ class HDeclareGlobals V8_FINAL : public HUnaryOperation {
 };
 
 
-class HGlobalObject V8_FINAL : public HUnaryOperation {
- public:
-  DECLARE_INSTRUCTION_WITH_CONTEXT_FACTORY_P0(HGlobalObject);
-
-  DECLARE_CONCRETE_INSTRUCTION(GlobalObject)
-
-  virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
-    return Representation::Tagged();
-  }
-
- protected:
-  virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; }
-
- private:
-  explicit HGlobalObject(HValue* context) : HUnaryOperation(context) {
-    set_representation(Representation::Tagged());
-    SetFlag(kUseGVN);
-  }
-
-  virtual bool IsDeletable() const V8_OVERRIDE { return true; }
-};
-
-
-class HGlobalReceiver V8_FINAL : public HUnaryOperation {
- public:
-  DECLARE_INSTRUCTION_FACTORY_P1(HGlobalReceiver, HValue*);
-
-  DECLARE_CONCRETE_INSTRUCTION(GlobalReceiver)
-
-  virtual Representation RequiredInputRepresentation(int index) V8_OVERRIDE {
-    return Representation::Tagged();
-  }
-
- protected:
-  virtual bool DataEquals(HValue* other) V8_OVERRIDE { return true; }
-
- private:
-  explicit HGlobalReceiver(HValue* global_object)
-      : HUnaryOperation(global_object) {
-    set_representation(Representation::Tagged());
-    SetFlag(kUseGVN);
-  }
-
-  virtual bool IsDeletable() const V8_OVERRIDE { return true; }
-};
-
-
 template <int V>
 class HCall : public HTemplateInstruction<V> {
  public: