[turbofan] Make global variable loads and stores explicit.

src/compiler/js-operator.h

Index: src/compiler/js-operator.h
diff --git a/src/compiler/js-operator.h b/src/compiler/js-operator.h
index 222383f0eced94d69eb71b0772e1bca93b9e93e6..a0f2668a14325c7991d4459c8adb8a1c5ad01216 100644
--- a/src/compiler/js-operator.h
+++ b/src/compiler/js-operator.h
@@ -227,7 +227,7 @@ DynamicContextAccess const& DynamicContextAccessOf(Operator const*);
 
 
 // Defines the property being loaded from an object by a named load. This is
-// used as a parameter by JSLoadNamed operators.
+// used as a parameter by JSLoadNamed and JSLoadGlobal operators.
 class LoadNamedParameters final {
  public:
   LoadNamedParameters(const Unique<Name>& name, const VectorSlotPair& feedback,
@@ -254,6 +254,8 @@ std::ostream& operator<<(std::ostream&, LoadNamedParameters const&);
 
 const LoadNamedParameters& LoadNamedParametersOf(const Operator* op);
 
+const LoadNamedParameters& LoadGlobalParametersOf(const Operator* op);
+
 
 // Defines the property being loaded from an object. This is
 // used as a parameter by JSLoadProperty operators.
@@ -279,7 +281,7 @@ const LoadPropertyParameters& LoadPropertyParametersOf(const Operator* op);
 
 
 // Defines the property being stored to an object by a named store. This is
-// used as a parameter by JSStoreNamed operators.
+// used as a parameter by JSStoreNamed and JSStoreGlobal operators.
 class StoreNamedParameters final {
  public:
   StoreNamedParameters(LanguageMode language_mode,
@@ -305,6 +307,8 @@ std::ostream& operator<<(std::ostream&, StoreNamedParameters const&);
 
 const StoreNamedParameters& StoreNamedParametersOf(const Operator* op);
 
+const StoreNamedParameters& StoreGlobalParametersOf(const Operator* op);
+
 
 // Defines the property being stored to an object. This is used as a parameter
 // by JSStoreProperty operators.
@@ -408,8 +412,7 @@ class JSOperatorBuilder final : public ZoneObject {
 
   const Operator* LoadProperty(const VectorSlotPair& feedback);
   const Operator* LoadNamed(const Unique<Name>& name,
-                            const VectorSlotPair& feedback,
-                            ContextualMode contextual_mode = NOT_CONTEXTUAL);
+                            const VectorSlotPair& feedback);
 
   const Operator* StoreProperty(LanguageMode language_mode,
                                 const VectorSlotPair& feedback);
@@ -421,6 +424,13 @@ class JSOperatorBuilder final : public ZoneObject {
 
   const Operator* HasProperty();
 
+  const Operator* LoadGlobal(const Unique<Name>& name,
+                             const VectorSlotPair& feedback,
+                             ContextualMode contextual_mode = NOT_CONTEXTUAL);
+  const Operator* StoreGlobal(LanguageMode language_mode,
+                              const Unique<Name>& name,
+                              const VectorSlotPair& feedback);
+
   const Operator* LoadContext(size_t depth, size_t index, bool immutable);
   const Operator* StoreContext(size_t depth, size_t index);