harmony-scoping: Implement LoadIC handler for loads from global contexts.

src/hydrogen-instructions.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_HYDROGEN_INSTRUCTIONS_H_
 #define V8_HYDROGEN_INSTRUCTIONS_H_
 
 #include <iosfwd>
 
 #include "src/v8.h"
@@ skipping 6258 matching lines @@
   static HObjectAccess ForObservableJSObjectOffset(int offset,
       Representation representation = Representation::Tagged()) {
     return ForMapAndOffset(Handle<Map>::null(), offset, representation);
   }
 
   // Create an access to an in-object property in a JSArray.
   static HObjectAccess ForJSArrayOffset(int offset);
 
   static HObjectAccess ForContextSlot(int index);
 
+  static HObjectAccess ForGlobalContext(int index);
+
   // Create an access to the backing store of an object.
   static HObjectAccess ForBackingStoreOffset(int offset,
       Representation representation = Representation::Tagged());
 
   // Create an access to a resolved field (in-object or backing store).
   static HObjectAccess ForField(Handle<Map> map, int index,
                                 Representation representation,
                                 Handle<String> name);
 
   // Create an access for the payload of a Cell or JSGlobalPropertyCell.
@@ skipping 1689 matching lines @@
 };
 
 
 
 #undef DECLARE_INSTRUCTION
 #undef DECLARE_CONCRETE_INSTRUCTION
 
 } }  // namespace v8::internal
 
 #endif  // V8_HYDROGEN_INSTRUCTIONS_H_