Allocate arguments object on-demand instead of at function entry....

src/ast.cc

 // Copyright 2006-2008 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 50 matching lines @@
 VariableProxy::VariableProxy(Handle<String> name,
                              bool is_this,
                              bool inside_with)
   : name_(name),
     var_(NULL),
     is_this_(is_this),
     inside_with_(inside_with) {
   // names must be canonicalized for fast equality checks
   ASSERT(name->IsSymbol());
   // at least one access, otherwise no need for a VariableProxy
-  var_uses_.RecordAccess(1);
+  var_uses_.RecordRead(1);
 }
 
 
 VariableProxy::VariableProxy(bool is_this)
   : is_this_(is_this) {
 }
 
 
 void VariableProxy::BindTo(Variable* var) {
   ASSERT(var_ == NULL);  // must be bound only once
@@ skipping 421 matching lines @@
     if (kInfinity - max_match_ < node_max_match) {
       max_match_ = kInfinity;
     } else {
       max_match_ += node->max_match();
     }
   }
 }
 
 
 } }  // namespace v8::internal