Allocate fewer handles in the TypeFeedbackOracle.

src/type-info.cc

 // Copyright 2011 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 63 matching lines @@
   return entry != NumberDictionary::kNotFound
       ? Handle<Object>(dictionary_->ValueAt(entry))
       : Isolate::Current()->factory()->undefined_value();
 }
 
 
 bool TypeFeedbackOracle::LoadIsMonomorphic(Property* expr) {
   Handle<Object> map_or_code(GetInfo(expr->id()));
   if (map_or_code->IsMap()) return true;
   if (map_or_code->IsCode()) {
-    Handle<Code> code(Code::cast(*map_or_code));
+    Handle<Code> code = Handle<Code>::cast(map_or_code);
     return code->is_keyed_load_stub() &&
         code->ic_state() == MONOMORPHIC &&
         code->FindFirstMap() != NULL;
   }
   return false;
 }
 
 
 bool TypeFeedbackOracle::StoreIsMonomorphic(Expression* expr) {
   Handle<Object> map_or_code(GetInfo(expr->id()));
   if (map_or_code->IsMap()) return true;
   if (map_or_code->IsCode()) {
-    Handle<Code> code(Code::cast(*map_or_code));
+    Handle<Code> code = Handle<Code>::cast(map_or_code);
     return code->is_keyed_store_stub() &&
         code->ic_state() == MONOMORPHIC;
   }
   return false;
 }
 
 
 bool TypeFeedbackOracle::CallIsMonomorphic(Call* expr) {
   Handle<Object> value = GetInfo(expr->id());
   return value->IsMap() || value->IsSmi();
 }
 
 
 Handle<Map> TypeFeedbackOracle::LoadMonomorphicReceiverType(Property* expr) {
   ASSERT(LoadIsMonomorphic(expr));
-  Handle<Object> map_or_code(
-      Handle<HeapObject>::cast(GetInfo(expr->id())));
+  Handle<Object> map_or_code(GetInfo(expr->id()));
   if (map_or_code->IsCode()) {
-    Handle<Code> code(Code::cast(*map_or_code));
+    Handle<Code> code = Handle<Code>::cast(map_or_code);
     Map* first_map = code->FindFirstMap();
     ASSERT(first_map != NULL);
     return Handle<Map>(first_map);
   }
-  return Handle<Map>(Map::cast(*map_or_code));
+  return Handle<Map>::cast(map_or_code);
 }
 
 
 Handle<Map> TypeFeedbackOracle::StoreMonomorphicReceiverType(Expression* expr) {
   ASSERT(StoreIsMonomorphic(expr));
-  Handle<HeapObject> map_or_code(
-      Handle<HeapObject>::cast(GetInfo(expr->id())));
+  Handle<Object> map_or_code(GetInfo(expr->id()));
   if (map_or_code->IsCode()) {
-    Handle<Code> code(Code::cast(*map_or_code));
+    Handle<Code> code = Handle<Code>::cast(map_or_code);
     return Handle<Map>(code->FindFirstMap());
   }
-  return Handle<Map>(Map::cast(*map_or_code));
+  return Handle<Map>::cast(map_or_code);
 }
 
 
 ZoneMapList* TypeFeedbackOracle::LoadReceiverTypes(Property* expr,
                                                    Handle<String> name) {
   Code::Flags flags = Code::ComputeMonomorphicFlags(Code::LOAD_IC, NORMAL);
   return CollectReceiverTypes(expr->id(), name, flags);
 }
 
 
@@ skipping 356 matching lines @@
           static_cast<int>(info->pc() - code->instruction_start()));
       ASSERT(ast_ids->length() == 0 ||
              (*ast_ids)[ast_ids->length()-1] !=
              static_cast<unsigned>(info->data()));
       ast_ids->Add(static_cast<unsigned>(info->data()));
     }
   }
 }
 
 } }  // namespace v8::internal