Use hash map to look for objects in the root array when serializing.

R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/645533003

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@24826 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/compiler.cc

@@ -1238,8 +1238,8 @@ Handle<SharedFunctionInfo> Compiler::CompileScript(
             isolate->counters()->compile_serialize());
         *cached_data = CodeSerializer::Serialize(isolate, result, source);
         if (FLAG_profile_deserialization) {
-          PrintF("[Compiling and serializing %d bytes took %0.3f ms]\n",
-                 (*cached_data)->length(), timer.Elapsed().InMillisecondsF());
+          PrintF("[Compiling and serializing took %0.3f ms]\n",
+                 timer.Elapsed().InMillisecondsF());
         }
       }
     }

src/heap/heap-inl.h

@@ -699,7 +699,7 @@ void ExternalStringTable::ShrinkNewStrings(int position) {
 
 
 void Heap::ClearInstanceofCache() {
-  set_instanceof_cache_function(the_hole_value());
+  set_instanceof_cache_function(Smi::FromInt(0));
 }
 
 
@@ -709,8 +709,8 @@ Object* Heap::ToBoolean(bool condition) {
 
 
 void Heap::CompletelyClearInstanceofCache() {
-  set_instanceof_cache_map(the_hole_value());
-  set_instanceof_cache_function(the_hole_value());
+  set_instanceof_cache_map(Smi::FromInt(0));
+  set_instanceof_cache_function(Smi::FromInt(0));
 }
 
 

src/heap/heap.cc

@@ -2906,7 +2906,7 @@ void Heap::CreateInitialObjects() {
   set_undefined_cell(*factory->NewCell(factory->undefined_value()));
 
   // The symbol registry is initialized lazily.
-  set_symbol_registry(undefined_value());
+  set_symbol_registry(Smi::FromInt(0));
 
   // Allocate object to hold object observation state.
   set_observation_state(*factory->NewJSObjectFromMap(

src/isolate.cc

@@ -2206,7 +2206,7 @@ ISOLATE_INIT_ARRAY_LIST(ISOLATE_FIELD_OFFSET)
 
 
 Handle<JSObject> Isolate::GetSymbolRegistry() {
-  if (heap()->symbol_registry()->IsUndefined()) {
+  if (heap()->symbol_registry()->IsSmi()) {
     Handle<Map> map = factory()->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
     Handle<JSObject> registry = factory()->NewJSObjectFromMap(map);
     heap()->set_symbol_registry(*registry);