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

src/ic-inl.h

 // Copyright 2012 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 102 matching lines @@
 HeapObject* IC::GetCodeCacheHolder(Isolate* isolate,
                                  Object* object,
                                  InlineCacheHolderFlag holder) {
   if (object->IsSmi()) holder = PROTOTYPE_MAP;
   Object* map_owner = holder == OWN_MAP
       ? object : object->GetPrototype(isolate);
   return HeapObject::cast(map_owner);
 }
 
 
+InlineCacheHolderFlag IC::GetCodeCacheFlag(Type* type) {
+  if (type->Is(Type::Boolean())) return PROTOTYPE_MAP;

[rossberg, 2013/11/18 17:02:06]

Nit: why not use a disjunction?

+  if (type->Is(Type::Number())) return PROTOTYPE_MAP;
+  if (type->Is(Type::String())) return PROTOTYPE_MAP;
+  if (type->Is(Type::Symbol())) return PROTOTYPE_MAP;
+  return OWN_MAP;
+}
+
+
+Handle<Map> IC::GetCodeCacheHolder(InlineCacheHolderFlag flag,
+                                   Type* type,
+                                   Isolate* isolate) {
+  if (flag == PROTOTYPE_MAP) {
+    Context* context = isolate->context()->native_context();
+    JSFunction* constructor;
+    if (type->Is(Type::Boolean())) {
+      constructor = context->boolean_function();
+    } else if (type->Is(Type::Number())) {
+      constructor = context->number_function();
+    } else if (type->Is(Type::String())) {
+      constructor = context->string_function();
+    } else {
+      ASSERT(type->Is(Type::Symbol()));
+      constructor = context->symbol_function();
+    }
+    return handle(JSObject::cast(constructor->instance_prototype())->map());
+  }
+  return type->AsClass();
+}
+
+
 } }  // namespace v8::internal
 
 #endif  // V8_IC_INL_H_