[modules] Introduce new VariableLocation for module imports/exports.

src/ast/scopes.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_SCOPES_H_
 #define V8_AST_SCOPES_H_
 
 #include "src/ast/ast.h"
 #include "src/base/hashmap.h"
 #include "src/globals.h"
@@ skipping 560 matching lines @@
   // the scope where var declarations will be hoisted to in the implementation.
   Scope* DeclarationScope();
 
   // Find the first non-block declaration scope. This should be either a script,
   // function, or eval scope. Same as DeclarationScope(), but skips
   // declaration "block" scopes. Used for differentiating associated
   // function objects (i.e., the scope for which a function prologue allocates
   // a context) or declaring temporaries.
   Scope* ClosureScope();
 
+  // Find the module scope if there is one.
+  Scope* ModuleScope();
+
   // Find the first (non-arrow) function or script scope.  This is where
   // 'this' is bound, and what determines the function kind.
   Scope* ReceiverScope();
 
   Handle<ScopeInfo> GetScopeInfo(Isolate* isolate);
 
   Handle<StringSet> CollectNonLocals(Handle<StringSet> non_locals);
 
   // ---------------------------------------------------------------------------
   // Strict mode support.
@@ skipping 228 matching lines @@
   void AllocateParameterLocals();
   void AllocateNonParameterLocal(Variable* var,
                                  AstValueFactory* ast_value_factory);
   void AllocateDeclaredGlobal(Variable* var,
                               AstValueFactory* ast_value_factory);
   void AllocateNonParameterLocalsAndDeclaredGlobals(
       AstValueFactory* ast_value_factory);
   void AllocateVariablesRecursively(AstValueFactory* ast_value_factory);
   void AllocateParameter(Variable* var, int index);
   void AllocateReceiver();
+  // Set MODULE as VariableLocation for all variables that will live in some
+  // module's export table.
+  void AllocateModuleVariables();
 
   // Resolve and fill in the allocation information for all variables
   // in this scopes. Must be called *after* all scopes have been
   // processed (parsed) to ensure that unresolved variables can be
   // resolved properly.
   //
   // In the case of code compiled and run using 'eval', the context
   // parameter is the context in which eval was called.  In all other
   // cases the context parameter is an empty handle.
   MUST_USE_RESULT
@@ skipping 32 matching lines @@
 
   void SetDefaults();
 
   PendingCompilationErrorHandler pending_error_handler_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_AST_SCOPES_H_