Convert PatchCache (and related methods) to use types rather than objects/maps.

src/objects.cc

 // Copyright 2013 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 10532 matching lines @@
 }
 
 
 void Code::FindAllMaps(MapHandleList* maps) {
   ASSERT(is_inline_cache_stub());
   DisallowHeapAllocation no_allocation;
   int mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
   for (RelocIterator it(this, mask); !it.done(); it.next()) {
     RelocInfo* info = it.rinfo();
     Object* object = info->target_object();
-    if (object->IsMap()) maps->Add(Handle<Map>(Map::cast(object)));
+    if (object->IsMap()) maps->Add(handle(Map::cast(object)));
   }
 }
 
+
+void Code::FindAllTypes(TypeHandleList* types) {
+  ASSERT(is_inline_cache_stub());
+  DisallowHeapAllocation no_allocation;
+  int mask = RelocInfo::ModeMask(RelocInfo::EMBEDDED_OBJECT);
+  Isolate* isolate = GetIsolate();
+  for (RelocIterator it(this, mask); !it.done(); it.next()) {
+    RelocInfo* info = it.rinfo();
+    Object* object = info->target_object();
+    if (object->IsMap()) {
+      Handle<Map> map(Map::cast(object));
+      types->Add(handle(IC::GetType(map), isolate));
+    }
+  }
+}
+
 
 void Code::ReplaceFirstMap(Map* replace_with) {
   ReplaceNthObject(1, GetHeap()->meta_map(), replace_with);
 }
 
 
 Code* Code::FindFirstHandler() {
   ASSERT(is_inline_cache_stub());
   DisallowHeapAllocation no_allocation;
   int mask = RelocInfo::ModeMask(RelocInfo::CODE_TARGET);
@@ skipping 6065 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal