[turbofan] Make global variable loads and stores explicit.

src/compiler/ast-graph-builder.h

Index: src/compiler/ast-graph-builder.h
diff --git a/src/compiler/ast-graph-builder.h b/src/compiler/ast-graph-builder.h
index e3cf7b57eae5a4bc33f9b54a2cbb1b9beccaa3fa..770d2d94345f41972f30df9095fbee428191f142 100644
--- a/src/compiler/ast-graph-builder.h
+++ b/src/compiler/ast-graph-builder.h
@@ -290,11 +290,10 @@ class AstGraphBuilder : public AstVisitor {
   Node* BuildKeyedLoad(Node* receiver, Node* key,
                        const VectorSlotPair& feedback);
   Node* BuildNamedLoad(Node* receiver, Handle<Name> name,
-                       const VectorSlotPair& feedback,
-                       ContextualMode mode = NOT_CONTEXTUAL);
+                       const VectorSlotPair& feedback);
   Node* BuildKeyedStore(Node* receiver, Node* key, Node* value,
                         const VectorSlotPair& feedback, TypeFeedbackId id);
-  Node* BuildNamedStore(Node* receiver, Handle<Name>, Node* value,
+  Node* BuildNamedStore(Node* receiver, Handle<Name> name, Node* value,
                         const VectorSlotPair& feedback, TypeFeedbackId id);
 
   // Builders for super property loads and stores.
@@ -307,6 +306,12 @@ class AstGraphBuilder : public AstVisitor {
   Node* BuildKeyedSuperLoad(Node* receiver, Node* home_object, Node* key,
                             const VectorSlotPair& feedback);
 
+  // Builders for global variable loads and stores.
+  Node* BuildGlobalLoad(Node* global, Handle<Name> name,
+                        const VectorSlotPair& feedback, ContextualMode mode);
+  Node* BuildGlobalStore(Node* global, Handle<Name> name, Node* value,
+                         const VectorSlotPair& feedback, TypeFeedbackId id);
+
   // Builders for accessing the function context.
   Node* BuildLoadBuiltinsObject();
   Node* BuildLoadGlobalObject();