Support for global var shortcuts in script contexts.

src/ast.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_AST_H_
 #define V8_AST_H_
 
 #include "src/v8.h"
 
 #include "src/assembler.h"
@@ skipping 1642 matching lines @@
   void set_is_resolved() {
     bit_field_ = IsResolvedField::update(bit_field_, true);
   }
 
   int end_position() const { return end_position_; }
 
   // Bind this proxy to the variable var.
   void BindTo(Variable* var);
 
   bool UsesVariableFeedbackSlot() const {
-    return var()->IsUnallocated() || var()->IsLookupSlot();
+    return var()->IsUnallocatedOrGlobalSlot() || var()->IsLookupSlot();
   }
 
   virtual FeedbackVectorRequirements ComputeFeedbackRequirements(
       Isolate* isolate, const ICSlotCache* cache) override;
 
   void SetFirstFeedbackICSlot(FeedbackVectorICSlot slot,
                               ICSlotCache* cache) override;
   Code::Kind FeedbackICSlotKind(int index) override { return Code::LOAD_IC; }
   FeedbackVectorICSlot VariableFeedbackSlot() {
     DCHECK(!UsesVariableFeedbackSlot() || !variable_feedback_slot_.IsInvalid());
@@ skipping 172 matching lines @@
 
   bool IsMonomorphic() override {
     if (expression()->IsProperty()) {
       return expression()->AsProperty()->IsMonomorphic();
     }
     return !target_.is_null();
   }
 
   bool global_call() const {
     VariableProxy* proxy = expression_->AsVariableProxy();
-    return proxy != NULL && proxy->var()->IsUnallocated();
+    return proxy != NULL && proxy->var()->IsUnallocatedOrGlobalSlot();
   }
 
   bool known_global_function() const {
     return global_call() && !target_.is_null();
   }
 
   Handle<JSFunction> target() { return target_; }
 
   Handle<AllocationSite> allocation_site() { return allocation_site_; }
 
@@ skipping 1739 matching lines @@
 
  private:
   Zone* zone_;
   AstValueFactory* ast_value_factory_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_AST_H_