Add fast paths for Smi values in the dart embedding api.

vm/raw_object.cc

 // Copyright (c) 2012, 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/raw_object.h"
 
 #include "vm/freelist.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
 #include "vm/visitor.h"
@@ skipping 18 matching lines @@
   ASSERT(raw_class_class->IsHeapObject());
   ASSERT(raw_class_class->ptr()->instance_kind_ == kClass);
 
   // Validate that the tags_ field is sensible.
   intptr_t tags = ptr()->tags_;
   ASSERT((tags & 0xffff00f0) == 0);
 }
 
 
 intptr_t RawObject::SizeFromClass() const {
-  NoHandleScope no_handles(Isolate::Current());
+  NOHANDLESCOPE(Isolate::Current());
 
   // Only reasonable to be called on heap objects.
   ASSERT(IsHeapObject());
 
   RawClass* raw_class = ptr()->class_;
   intptr_t instance_size = raw_class->ptr()->instance_size_;
   ObjectKind instance_kind = raw_class->ptr()->instance_kind_;
 
   if (instance_size == 0) {
     switch (instance_kind) {
@@ skipping 130 matching lines @@
   intptr_t tags = ptr()->tags_;
   ASSERT((instance_size == SizeTag::decode(tags)) ||
          (SizeTag::decode(tags) == 0) ||
          FreeBit::decode(tags));
   return instance_size;
 }
 
 
 intptr_t RawObject::VisitPointers(ObjectPointerVisitor* visitor) {
   intptr_t size = 0;
-  NoHandleScope no_handles(Isolate::Current());
+  NOHANDLESCOPE(Isolate::Current());
 
   // Only reasonable to be called on heap objects.
   ASSERT(IsHeapObject());
 
   // Read the necessary data out of the class before visting the class itself.
   RawClass* raw_class = ptr()->class_;
   ObjectKind kind = raw_class->ptr()->instance_kind_;
 
   // Visit the class before visting the fields.
   visitor->VisitPointer(reinterpret_cast<RawObject**>(&ptr()->class_));
@@ skipping 492 matching lines @@
 intptr_t RawJSRegExp::VisitJSRegExpPointers(RawJSRegExp* raw_obj,
                                             ObjectPointerVisitor* visitor) {
   // Make sure that we got here with the tagged pointer as this.
   ASSERT(raw_obj->IsHeapObject());
   intptr_t length = Smi::Value(raw_obj->ptr()->data_length_);
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return JSRegExp::InstanceSize(length);
 }
 
 }  // namespace dart