More compact string representation on 64 bit.

runtime/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/become.h"
 #include "vm/class_table.h"
 #include "vm/dart.h"
 #include "vm/freelist.h"
@@ skipping 803 matching lines @@
   // String is an abstract class.
   UNREACHABLE();
   return 0;
 }
 
 
 intptr_t RawOneByteString::VisitOneByteStringPointers(
     RawOneByteString* raw_obj,
     ObjectPointerVisitor* visitor) {
   ASSERT(!raw_obj->ptr()->length_->IsHeapObject());
+#if !defined(HASH_IN_OBJECT_HEADER)
   ASSERT(!raw_obj->ptr()->hash_->IsHeapObject());
+#endif
   intptr_t length = Smi::Value(raw_obj->ptr()->length_);
   return OneByteString::InstanceSize(length);
 }
 
 
 intptr_t RawTwoByteString::VisitTwoByteStringPointers(
     RawTwoByteString* raw_obj,
     ObjectPointerVisitor* visitor) {
   ASSERT(!raw_obj->ptr()->length_->IsHeapObject());
+#if !defined(HASH_IN_OBJECT_HEADER)
   ASSERT(!raw_obj->ptr()->hash_->IsHeapObject());
+#endif
   intptr_t length = Smi::Value(raw_obj->ptr()->length_);
   return TwoByteString::InstanceSize(length);
 }
 
 
 intptr_t RawExternalOneByteString::VisitExternalOneByteStringPointers(
     RawExternalOneByteString* raw_obj,
     ObjectPointerVisitor* visitor) {
   // Make sure that we got here with the tagged pointer as this.
   ASSERT(raw_obj->IsHeapObject());
@@ skipping 159 matching lines @@
 intptr_t RawUserTag::VisitUserTagPointers(RawUserTag* raw_obj,
                                           ObjectPointerVisitor* visitor) {
   // Make sure that we got here with the tagged pointer as this.
   ASSERT(raw_obj->IsHeapObject());
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return UserTag::InstanceSize();
 }
 
 
 }  // namespace dart