Using SubtypeTestCache object instead of an array, that way we do not need to patch and can communi…

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/class_table.h"
 #include "vm/freelist.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
@@ skipping 436 matching lines @@
     RawContextScope* raw_obj, ObjectPointerVisitor* visitor) {
   intptr_t num_variables = raw_obj->ptr()->num_variables_;
   visitor->VisitPointers(raw_obj->from(), raw_obj->to(num_variables));
   return ContextScope::InstanceSize(num_variables);
 }
 
 
 intptr_t RawICData::VisitICDataPointers(RawICData* 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 ICData::InstanceSize();
 }
 
 
+intptr_t RawSubtypeTestCache::VisitSubtypeTestCachePointers(
+    RawSubtypeTestCache* raw_obj, ObjectPointerVisitor* visitor) {
+  // Make sure that we got here with the tagged pointer as this.
+  RawSubtypeTestCache* obj = raw_obj->ptr();
+  visitor->VisitPointer(reinterpret_cast<RawObject**>(&obj->cache_));
+  return SubtypeTestCache::InstanceSize();
+}
+
+
 intptr_t RawError::VisitErrorPointers(RawError* raw_obj,
                                       ObjectPointerVisitor* visitor) {
   // Error is an abstract class.
   UNREACHABLE();
   return 0;
 }
 
 
 intptr_t RawApiError::VisitApiErrorPointers(
     RawApiError* raw_obj, ObjectPointerVisitor* visitor) {
@@ skipping 227 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