Store pointer instead of reference to LocalVariable in ast and flow graph.

runtime/vm/ast_printer.cc

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/ast_printer.h"
 
 #include "vm/handles.h"
 #include "vm/object.h"
 #include "vm/os.h"
 #include "vm/parser.h"
@@ skipping 37 matching lines @@
   VisitGenericAstNode(arguments);
 }
 
 
 void AstPrinter::VisitReturnNode(ReturnNode* node) {
   VisitGenericAstNode(node);
 }
 
 
 void AstPrinter::VisitGenericLocalNode(AstNode* node,
-                                       const LocalVariable& var) {
+                                       const LocalVariable* var) {
   OS::Print("(%s %s%s '%s'",
             node->Name(),
-            var.is_final() ? "final " : "",
-            String::Handle(var.type().Name()).ToCString(),
-            var.name().ToCString());
-  if (var.HasIndex()) {
-    OS::Print(" @%d", var.index());
-    if (var.is_captured()) {
-      OS::Print(" ctx %d", var.owner()->context_level());
+            var->is_final() ? "final " : "",
+            String::Handle(var->type().Name()).ToCString(),
+            var->name().ToCString());
+  if (var->HasIndex()) {
+    OS::Print(" @%d", var->index());
+    if (var->is_captured()) {
+      OS::Print(" ctx %d", var->owner()->context_level());
     }
   }
   node->VisitChildren(this);
   OS::Print(")");
 }
 
 
 void AstPrinter::VisitLoadLocalNode(LoadLocalNode* node) {
   VisitGenericLocalNode(node, node->local());
 }
@@ skipping 394 matching lines @@
   ASSERT(node_sequence != NULL);
   AstPrinter ast_printer;
   const char* function_name =
       parsed_function.function().ToFullyQualifiedCString();
   OS::Print("Ast for function '%s' {\n", function_name);
   node_sequence->Visit(&ast_printer);
   OS::Print("}\n");
 }
 
 }  // namespace dart