Add basic compilation support for modules

src/full-codegen.cc

 // 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.
 
 #include "src/v8.h"
 
 #include "src/ast.h"
 #include "src/ast-numbering.h"
 #include "src/code-factory.h"
 #include "src/codegen.h"
@@ skipping 707 matching lines @@
     module_index_ = 0;
 
     // Generate code for allocating all modules, including nested ones.
     // The allocated contexts are stored in internal variables in this scope.
     AllocateModules(declarations);
   }
 
   AstVisitor::VisitDeclarations(declarations);
 
   if (scope_->num_modules() != 0) {
+    // TODO(ES6): This step, which creates module instance objects,
+    // can probably be delayed until an "import *" declaration
+    // reifies a module instance. Until imports are implemented,
+    // we skip it altogether.
+    //
     // Initialize modules from descriptor array.
-    DCHECK(module_index_ == modules_->length());
-    DeclareModules(modules_);
+    //  DCHECK(module_index_ == modules_->length());
+    //  DeclareModules(modules_);
     modules_ = saved_modules;
     module_index_ = saved_module_index;
   }
 
   if (!globals_->is_empty()) {
     // Invoke the platform-dependent code generator to do the actual
     // declaration of the global functions and variables.
     Handle<FixedArray> array =
        isolate()->factory()->NewFixedArray(globals_->length(), TENURED);
     for (int i = 0; i < globals_->length(); ++i)
@@ skipping 1083 matching lines @@
   }
   codegen_->PrepareForBailoutForId(exit_id_, NO_REGISTERS);
   codegen_->scope_ = saved_scope_;
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal