Both HGlobalObject and HGlobalReceiver can be replaced with HLoadNamedField.

src/hydrogen.cc

Index: src/hydrogen.cc
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 2f0c86d60545223b1c92c623d5b8cae294ac74cb..9cfb4f0f087aa27e9bb514ea8aa8b9dafff2ad7c 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -2697,10 +2697,11 @@ HInstruction* HGraphBuilder::BuildGetNativeContext(HValue* closure) {
 
 HInstruction* HGraphBuilder::BuildGetNativeContext() {
   // Get the global context, then the native context
-  HInstruction* global_object = Add<HGlobalObject>();
-  HObjectAccess access = HObjectAccess::ForJSObjectOffset(
-      GlobalObject::kNativeContextOffset);
-  return Add<HLoadNamedField>(global_object, access);
+  HValue* global_object = Add<HLoadNamedField>(
+      context(), HObjectAccess::ForContextSlot(Context::GLOBAL_OBJECT_INDEX));
+  return Add<HLoadNamedField>(
+      global_object, HObjectAccess::ForJSObjectOffset(
+          GlobalObject::kNativeContextOffset));
 }
 
 
@@ -2896,7 +2897,8 @@ HStoreNamedField* HGraphBuilder::AddStoreMapConstant(HValue *object,
 
 
 HValue* HGraphBuilder::AddLoadJSBuiltin(Builtins::JavaScript builtin) {
-  HGlobalObject* global_object = Add<HGlobalObject>();
+  HValue* global_object = Add<HLoadNamedField>(
+      context(), HObjectAccess::ForContextSlot(Context::GLOBAL_OBJECT_INDEX));
   HObjectAccess access = HObjectAccess::ForJSObjectOffset(
       GlobalObject::kBuiltinsOffset);
   HValue* builtins = Add<HLoadNamedField>(global_object, access);
@@ -4777,7 +4779,9 @@ void HOptimizedGraphBuilder::VisitVariableProxy(VariableProxy* expr) {
           return ast_context()->ReturnInstruction(instr, expr->id());
         }
       } else {
-        HGlobalObject* global_object = Add<HGlobalObject>();
+        HValue* global_object = Add<HLoadNamedField>(
+            context(), HObjectAccess::ForContextSlot(
+                Context::GLOBAL_OBJECT_INDEX));
         HLoadGlobalGeneric* instr =
             New<HLoadGlobalGeneric>(global_object,
                                     variable->name(),
@@ -5901,7 +5905,8 @@ void HOptimizedGraphBuilder::HandleGlobalVariableAssignment(
       Add<HSimulate>(ast_id, REMOVABLE_SIMULATE);
     }
   } else {
-    HGlobalObject* global_object = Add<HGlobalObject>();
+    HValue* global_object = Add<HLoadNamedField>(
+        context(), HObjectAccess::ForContextSlot(Context::GLOBAL_OBJECT_INDEX));
     HStoreNamedGeneric* instr =
         Add<HStoreNamedGeneric>(global_object, var->name(),
                                  value, function_strict_mode_flag());
@@ -7954,7 +7959,9 @@ void HOptimizedGraphBuilder::VisitCall(Call* expr) {
       if (known_global_function) {
         // Push the global object instead of the global receiver because
         // code generated by the full code generator expects it.
-        HGlobalObject* global_object = Add<HGlobalObject>();
+        HValue* global_object = Add<HLoadNamedField>(
+            context(), HObjectAccess::ForContextSlot(
+                Context::GLOBAL_OBJECT_INDEX));
         Push(global_object);
 
         CHECK_ALIVE(VisitExpressions(expr->arguments()));
@@ -7985,7 +7992,9 @@ void HOptimizedGraphBuilder::VisitCall(Call* expr) {
         if (CallStubCompiler::HasCustomCallGenerator(expr->target())) {
           // We're about to install a contextual IC, which expects the global
           // object as receiver rather than the global proxy.
-          HGlobalObject* global_object = Add<HGlobalObject>();
+          HValue* global_object = Add<HLoadNamedField>(
+              context(), HObjectAccess::ForContextSlot(
+                  Context::GLOBAL_OBJECT_INDEX));
           const int receiver_index = argument_count - 1;
           environment()->SetExpressionStackAt(receiver_index, global_object);
           // When the target has a custom call IC generator, use the IC,
@@ -7997,7 +8006,9 @@ void HOptimizedGraphBuilder::VisitCall(Call* expr) {
           PushArgumentsFromEnvironment(argument_count);
         }
       } else {
-        HGlobalObject* receiver = Add<HGlobalObject>();
+        HValue* receiver = Add<HLoadNamedField>(
+            context(), HObjectAccess::ForContextSlot(
+                Context::GLOBAL_OBJECT_INDEX));
         Push(Add<HPushArgument>(receiver));
         CHECK_ALIVE(VisitArgumentList(expr->arguments()));