Extend AST with basic module constructs (yet unused).

src/hydrogen.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 6564 matching lines @@
           environment()->Bind(var, value);
         }
       }
       break;
     case Variable::LOOKUP:
       return Bailout("unsupported lookup slot in declaration");
   }
 }
 
 
+void HGraphBuilder::VisitModuleDeclaration(ModuleDeclaration* decl) {
+  // TODO(rossberg)
+}
+
+
+void HGraphBuilder::VisitModuleLiteral(ModuleLiteral* module) {
+  // TODO(rossberg)
+}
+
+
+void HGraphBuilder::VisitModuleVariable(ModuleVariable* module) {
+  // TODO(rossberg)
+}
+
+
+void HGraphBuilder::VisitModulePath(ModulePath* module) {
+  // TODO(rossberg)
+}
+
+
+void HGraphBuilder::VisitModuleUrl(ModuleUrl* module) {
+  // TODO(rossberg)
+}
+
+
 // Generators for inline runtime functions.
 // Support for types.
 void HGraphBuilder::GenerateIsSmi(CallRuntime* call) {
   ASSERT(call->arguments()->length() == 1);
   CHECK_ALIVE(VisitForValue(call->arguments()->at(0)));
   HValue* value = Pop();
   HIsSmiAndBranch* result = new(zone()) HIsSmiAndBranch(value);
   return ast_context()->ReturnControl(result, call->id());
 }
 
@@ skipping 1033 matching lines @@
     }
   }
 
 #ifdef DEBUG
   if (graph_ != NULL) graph_->Verify(false);  // No full verify.
   if (allocator_ != NULL) allocator_->Verify();
 #endif
 }
 
 } }  // namespace v8::internal