Support for global var shortcuts in script contexts.

src/globals.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_GLOBALS_H_
 #define V8_GLOBALS_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 863 matching lines @@
 // immediately initialized upon creation (kCreatedInitialized).
 enum InitializationFlag {
   kNeedsInitialization,
   kCreatedInitialized
 };
 
 
 enum MaybeAssignedFlag { kNotAssigned, kMaybeAssigned };
 
 
+// This flag defines whether the context slot belongs to a variable of
+// this context or the context slot is a shortcut to a global property cell.
+enum class ContextSlotKindFlag { kLocal, kGlobal };

[Toon Verwaest, 2015/07/01 09:28:55]

What about changing Variable::Location to have a GLOBAL or so, rather than
having CONTEXT that is kLocal or kGlobal?

[Igor Sheludko, 2015/07/02 16:50:13]

Done.

+
+
 // Serialized in PreparseData, so numeric values should not be changed.
 enum ParseErrorType { kSyntaxError = 0, kReferenceError = 1 };
 
 
 enum ClearExceptionFlag {
   KEEP_EXCEPTION,
   CLEAR_EXCEPTION
 };
 
 
@@ skipping 102 matching lines @@
 inline FunctionKind WithObjectLiteralBit(FunctionKind kind) {
   kind = static_cast<FunctionKind>(kind | FunctionKind::kInObjectLiteral);
   DCHECK(IsValidFunctionKind(kind));
   return kind;
 }
 } }  // namespace v8::internal
 
 namespace i = v8::internal;
 
 #endif  // V8_GLOBALS_H_