A64: Synchronize with r17104.

src/stub-cache.cc

 // 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 81 matching lines @@
 
   // Update primary cache.
   primary->key = name;
   primary->value = code;
   primary->map = map;
   isolate()->counters()->megamorphic_stub_cache_updates()->Increment();
   return code;
 }
 
 
-Handle<JSObject> StubCache::StubHolder(Handle<JSObject> receiver,
-                                       Handle<JSObject> holder) {
-  InlineCacheHolderFlag cache_holder =
-      IC::GetCodeCacheForObject(*receiver, *holder);
-  return Handle<JSObject>(IC::GetCodeCacheHolder(
-      isolate_, *receiver, cache_holder));
-}
-
-
 Handle<Code> StubCache::FindIC(Handle<Name> name,
                                Handle<Map> stub_holder_map,
                                Code::Kind kind,
-                               Code::StubType type,
                                Code::ExtraICState extra_state) {
-  Code::Flags flags = Code::ComputeMonomorphicFlags(kind, extra_state, type);
+  Code::Flags flags = Code::ComputeMonomorphicFlags(kind, extra_state);
   Handle<Object> probe(stub_holder_map->FindInCodeCache(*name, flags),
                        isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
   return Handle<Code>::null();
 }
 
 
 Handle<Code> StubCache::FindIC(Handle<Name> name,
                                Handle<JSObject> stub_holder,
                                Code::Kind kind,
-                               Code::StubType type,
                                Code::ExtraICState extra_ic_state) {
-  return FindIC(name, Handle<Map>(stub_holder->map()), kind,
-                type, extra_ic_state);
+  return FindIC(name, Handle<Map>(stub_holder->map()), kind, extra_ic_state);
 }
 
 
 Handle<Code> StubCache::FindLoadHandler(Handle<Name> name,
                                         Handle<JSObject> receiver,
-                                        Handle<JSObject> stub_holder,
-                                        Code::Kind kind,
-                                        Code::StubType type) {
-  InlineCacheHolderFlag holder_flag = receiver.is_identical_to(stub_holder)
-      ? OWN_MAP : PROTOTYPE_MAP;
-  ASSERT(type != Code::NORMAL);
+                                        Code::Kind kind) {
   Code::Flags flags = Code::ComputeMonomorphicFlags(
-      Code::STUB, Code::kNoExtraICState, type, kind, holder_flag);
-  Handle<Object> probe(stub_holder->map()->FindInCodeCache(*name, flags),
+      Code::HANDLER, Code::kNoExtraICState, Code::NORMAL, kind);
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
                        isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
   return Handle<Code>::null();
 }
 
 
 Handle<Code> StubCache::FindStoreHandler(Handle<Name> name,
                                          Handle<JSObject> receiver,
                                          Code::Kind kind,
-                                         Code::StubType type,
                                          StrictModeFlag strict_mode) {
   Code::ExtraICState extra_ic_state = Code::ComputeExtraICState(
       STANDARD_STORE, strict_mode);
-  ASSERT(type != Code::NORMAL);
   Code::Flags flags = Code::ComputeMonomorphicFlags(
-      Code::STUB, extra_ic_state, type, kind);
+      Code::HANDLER, extra_ic_state, Code::NORMAL, kind);
   Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
                        isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
   return Handle<Code>::null();
 }
 
 
-Handle<Code> StubCache::ComputeMonomorphicLoadIC(Handle<HeapObject> receiver,
-                                                 Handle<Code> handler,
-                                                 Handle<Name> name) {
+Handle<Code> StubCache::ComputeMonomorphicIC(Handle<HeapObject> receiver,
+                                             Handle<Code> handler,
+                                             Handle<Name> name,
+                                             StrictModeFlag strict_mode) {
+  Code::Kind kind = handler->handler_kind();
   Handle<Map> map(receiver->map());
-  Handle<Code> ic = FindIC(name, map, Code::LOAD_IC, handler->type());
+  Handle<Code> ic = FindIC(name, map, kind, strict_mode);
   if (!ic.is_null()) return ic;
 
-  LoadStubCompiler ic_compiler(isolate());
-  ic = ic_compiler.CompileMonomorphicIC(map, handler, name);
+  if (kind == Code::LOAD_IC) {
+    LoadStubCompiler ic_compiler(isolate());
+    ic = ic_compiler.CompileMonomorphicIC(map, handler, name);
+  } else if (kind == Code::KEYED_LOAD_IC) {
+    KeyedLoadStubCompiler ic_compiler(isolate());
+    ic = ic_compiler.CompileMonomorphicIC(map, handler, name);
+  } else if (kind == Code::STORE_IC) {
+    StoreStubCompiler ic_compiler(isolate(), strict_mode);
+    ic = ic_compiler.CompileMonomorphicIC(map, handler, name);
+  } else {
+    ASSERT(kind == Code::KEYED_STORE_IC);
+    KeyedStoreStubCompiler ic_compiler(isolate(), strict_mode, STANDARD_STORE);
+    ic = ic_compiler.CompileMonomorphicIC(map, handler, name);
+  }
 
   HeapObject::UpdateMapCodeCache(receiver, name, ic);
   return ic;
-}
-
-
-Handle<Code> StubCache::ComputeMonomorphicKeyedLoadIC(
-    Handle<HeapObject> receiver,
-    Handle<Code> handler,
-    Handle<Name> name) {
-  Handle<Map> map(receiver->map());
-  Handle<Code> ic = FindIC(name, map, Code::KEYED_LOAD_IC, handler->type());
-  if (!ic.is_null()) return ic;
-
-  KeyedLoadStubCompiler ic_compiler(isolate());
-  ic = ic_compiler.CompileMonomorphicIC(map, handler, name);
-
-  HeapObject::UpdateMapCodeCache(receiver, name, ic);
-  return ic;
-}
-
-
-Handle<Code> StubCache::ComputeMonomorphicStoreIC(Handle<HeapObject> receiver,
-                                                  Handle<Code> handler,
-                                                  Handle<Name> name,
-                                                  StrictModeFlag strict_mode) {
-  Handle<Map> map(receiver->map());
-  Handle<Code> ic = FindIC(
-      name, map, Code::STORE_IC, handler->type(), strict_mode);
-  if (!ic.is_null()) return ic;
-
-  StoreStubCompiler ic_compiler(isolate(), strict_mode);
-  ic = ic_compiler.CompileMonomorphicIC(map, handler, name);
-
-  HeapObject::UpdateMapCodeCache(receiver, name, ic);
-  return ic;
-}
-
-
-Handle<Code> StubCache::ComputeMonomorphicKeyedStoreIC(
-    Handle<HeapObject> receiver,
-    Handle<Code> handler,
-    Handle<Name> name,
-    StrictModeFlag strict_mode) {
-  Handle<Map> map(receiver->map());
-  Handle<Code> ic = FindIC(
-      name, map, Code::KEYED_STORE_IC, handler->type(), strict_mode);
-  if (!ic.is_null()) return ic;
-
-  KeyedStoreStubCompiler ic_compiler(isolate(), strict_mode, STANDARD_STORE);
-  ic = ic_compiler.CompileMonomorphicIC(map, handler, name);
-
-  HeapObject::UpdateMapCodeCache(receiver, name, ic);
-  return ic;
 }
 
 
 Handle<Code> StubCache::ComputeLoadNonexistent(Handle<Name> name,
                                                Handle<JSObject> receiver) {
   // If no global objects are present in the prototype chain, the load
   // nonexistent IC stub can be shared for all names for a given map
   // and we use the empty string for the map cache in that case.  If
   // there are global objects involved, we need to check global
   // property cells in the stub and therefore the stub will be
   // specific to the name.
   Handle<Name> cache_name = factory()->empty_string();
   Handle<JSObject> current;
   Handle<Object> next = receiver;
   Handle<GlobalObject> global;
   do {
     current = Handle<JSObject>::cast(next);
     next = Handle<Object>(current->GetPrototype(), isolate_);
     if (current->IsGlobalObject()) {
       global = Handle<GlobalObject>::cast(current);
       cache_name = name;
     } else if (!current->HasFastProperties()) {
       cache_name = name;
     }
   } while (!next->IsNull());
 
   // Compile the stub that is either shared for all names or
   // name specific if there are global objects involved.
-  Handle<Code> handler = FindLoadHandler(
-      cache_name, receiver, receiver, Code::LOAD_IC, Code::NONEXISTENT);
+  Handle<Code> handler = FindLoadHandler(cache_name, receiver, Code::LOAD_IC);
   if (!handler.is_null()) return handler;
 
   LoadStubCompiler compiler(isolate_);
   handler =
       compiler.CompileLoadNonexistent(receiver, current, cache_name, global);
   HeapObject::UpdateMapCodeCache(receiver, cache_name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeLoadField(Handle<Name> name,
                                          Handle<JSObject> receiver,
                                          Handle<JSObject> holder,
                                          PropertyIndex field,
                                          Representation representation) {
   if (receiver.is_identical_to(holder)) {
     LoadFieldStub stub(field.is_inobject(holder),
                        field.translate(holder),
                        representation);
     return stub.GetCode(isolate());
   }
 
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindLoadHandler(
-      name, receiver, stub_holder, Code::LOAD_IC, Code::FIELD);
+  Handle<Code> stub = FindLoadHandler(name, receiver, Code::LOAD_IC);
   if (!stub.is_null()) return stub;
 
   LoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
       compiler.CompileLoadField(receiver, holder, name, field, representation);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeLoadCallback(
     Handle<Name> name,
     Handle<JSObject> receiver,
     Handle<JSObject> holder,
     Handle<ExecutableAccessorInfo> callback) {
   ASSERT(v8::ToCData<Address>(callback->getter()) != 0);
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindLoadHandler(
-      name, receiver, stub_holder, Code::LOAD_IC, Code::CALLBACKS);
+  Handle<Code> stub = FindLoadHandler(name, receiver, Code::LOAD_IC);
   if (!stub.is_null()) return stub;
 
   LoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
       compiler.CompileLoadCallback(receiver, holder, name, callback);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeLoadCallback(
     Handle<Name> name,
     Handle<JSObject> receiver,
     Handle<JSObject> holder,
     const CallOptimization& call_optimization) {
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindLoadHandler(
-      name, receiver, stub_holder, Code::LOAD_IC, Code::CALLBACKS);
+  Handle<Code> stub = FindLoadHandler(name, receiver, Code::LOAD_IC);
   if (!stub.is_null()) return stub;
 
   LoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
       compiler.CompileLoadCallback(receiver, holder, name, call_optimization);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeLoadViaGetter(Handle<Name> name,
                                              Handle<JSObject> receiver,
                                              Handle<JSObject> holder,
                                              Handle<JSFunction> getter) {
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindLoadHandler(
-      name, receiver, stub_holder, Code::LOAD_IC, Code::CALLBACKS);
+  Handle<Code> stub = FindLoadHandler(name, receiver, Code::LOAD_IC);
   if (!stub.is_null()) return stub;
 
   LoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
       compiler.CompileLoadViaGetter(receiver, holder, name, getter);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeLoadConstant(Handle<Name> name,
                                             Handle<JSObject> receiver,
                                             Handle<JSObject> holder,
                                             Handle<Object> value) {
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> handler = FindLoadHandler(
-      name, receiver, stub_holder, Code::LOAD_IC, Code::CONSTANT);
+  Handle<Code> handler = FindLoadHandler(name, receiver, Code::LOAD_IC);
   if (!handler.is_null()) return handler;
 
   LoadStubCompiler compiler(isolate_);
   handler = compiler.CompileLoadConstant(receiver, holder, name, value);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
 
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeLoadInterceptor(Handle<Name> name,
                                                Handle<JSObject> receiver,
                                                Handle<JSObject> holder) {
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindLoadHandler(
-      name, receiver, stub_holder, Code::LOAD_IC, Code::INTERCEPTOR);
+  Handle<Code> stub = FindLoadHandler(name, receiver, Code::LOAD_IC);
   if (!stub.is_null()) return stub;
 
   LoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
         compiler.CompileLoadInterceptor(receiver, holder, name);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeLoadNormal(Handle<Name> name,
                                           Handle<JSObject> receiver) {
   return isolate_->builtins()->LoadIC_Normal();
 }
 
 
 Handle<Code> StubCache::ComputeLoadGlobal(Handle<Name> name,
                                           Handle<JSObject> receiver,
                                           Handle<GlobalObject> holder,
                                           Handle<PropertyCell> cell,
                                           bool is_dont_delete) {
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindIC(name, stub_holder, Code::LOAD_IC, Code::NORMAL);
+  Handle<Code> stub = FindIC(name, receiver, Code::LOAD_IC);
   if (!stub.is_null()) return stub;
 
   LoadStubCompiler compiler(isolate_);
   Handle<Code> ic =
       compiler.CompileLoadGlobal(receiver, holder, cell, name, is_dont_delete);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, ic);
+  HeapObject::UpdateMapCodeCache(receiver, name, ic);
   return ic;
 }
 
 
 Handle<Code> StubCache::ComputeKeyedLoadField(Handle<Name> name,
                                               Handle<JSObject> receiver,
                                               Handle<JSObject> holder,
                                               PropertyIndex field,
                                               Representation representation) {
   if (receiver.is_identical_to(holder)) {
     // TODO(titzer): this should use an HObjectAccess
     KeyedLoadFieldStub stub(field.is_inobject(holder),
                             field.translate(holder),
                             representation);
     return stub.GetCode(isolate());
   }
 
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindLoadHandler(
-      name, receiver, stub_holder, Code::KEYED_LOAD_IC, Code::FIELD);
+  Handle<Code> stub = FindLoadHandler(name, receiver, Code::KEYED_LOAD_IC);
   if (!stub.is_null()) return stub;
 
   KeyedLoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
       compiler.CompileLoadField(receiver, holder, name, field, representation);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeKeyedLoadConstant(Handle<Name> name,
                                                  Handle<JSObject> receiver,
                                                  Handle<JSObject> holder,
                                                  Handle<Object> value) {
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> handler = FindLoadHandler(
-      name, receiver, stub_holder, Code::KEYED_LOAD_IC,
-      Code::CONSTANT);
+  Handle<Code> handler = FindLoadHandler(name, receiver, Code::KEYED_LOAD_IC);
   if (!handler.is_null()) return handler;
 
   KeyedLoadStubCompiler compiler(isolate_);
   handler = compiler.CompileLoadConstant(receiver, holder, name, value);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeKeyedLoadInterceptor(Handle<Name> name,
                                                     Handle<JSObject> receiver,
                                                     Handle<JSObject> holder) {
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindLoadHandler(
-      name, receiver, stub_holder, Code::KEYED_LOAD_IC, Code::INTERCEPTOR);
+  Handle<Code> stub = FindLoadHandler(name, receiver, Code::KEYED_LOAD_IC);
   if (!stub.is_null()) return stub;
 
   KeyedLoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
       compiler.CompileLoadInterceptor(receiver, holder, name);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeKeyedLoadCallback(
     Handle<Name> name,
     Handle<JSObject> receiver,
     Handle<JSObject> holder,
     Handle<ExecutableAccessorInfo> callback) {
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindLoadHandler(
-      name, receiver, stub_holder, Code::KEYED_LOAD_IC, Code::CALLBACKS);
+  Handle<Code> stub = FindLoadHandler(name, receiver, Code::KEYED_LOAD_IC);
   if (!stub.is_null()) return stub;
 
   KeyedLoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
       compiler.CompileLoadCallback(receiver, holder, name, callback);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeKeyedLoadCallback(
     Handle<Name> name,
     Handle<JSObject> receiver,
     Handle<JSObject> holder,
     const CallOptimization& call_optimization) {
-  Handle<JSObject> stub_holder = StubHolder(receiver, holder);
-  Handle<Code> stub = FindLoadHandler(
-      name, receiver, stub_holder, Code::KEYED_LOAD_IC, Code::CALLBACKS);
+  Handle<Code> stub = FindLoadHandler(name, receiver, Code::KEYED_LOAD_IC);
   if (!stub.is_null()) return stub;
 
   KeyedLoadStubCompiler compiler(isolate_);
   Handle<Code> handler =
       compiler.CompileLoadCallback(receiver, holder, name, call_optimization);
-  HeapObject::UpdateMapCodeCache(stub_holder, name, handler);
+  HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeStoreField(Handle<Name> name,
                                           Handle<JSObject> receiver,
                                           LookupResult* lookup,
                                           StrictModeFlag strict_mode) {
   Handle<Code> stub = FindStoreHandler(
-      name, receiver, Code::STORE_IC, Code::FIELD, strict_mode);
+      name, receiver, Code::STORE_IC, strict_mode);
   if (!stub.is_null()) return stub;
 
   StoreStubCompiler compiler(isolate_, strict_mode);
   Handle<Code> handler = compiler.CompileStoreField(receiver, lookup, name);
   HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeStoreTransition(Handle<Name> name,
                                                Handle<JSObject> receiver,
                                                LookupResult* lookup,
                                                Handle<Map> transition,
                                                StrictModeFlag strict_mode) {
   Handle<Code> stub = FindStoreHandler(
-      name, receiver, Code::STORE_IC, Code::TRANSITION, strict_mode);
+      name, receiver, Code::STORE_IC, strict_mode);
   if (!stub.is_null()) return stub;
 
   StoreStubCompiler compiler(isolate_, strict_mode);
   Handle<Code> handler =
       compiler.CompileStoreTransition(receiver, lookup, transition, name);
   HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
@@ skipping 53 matching lines @@
                                            Handle<PropertyCell> cell,
                                            Handle<Object> value,
                                            StrictModeFlag strict_mode) {
   Isolate* isolate = cell->GetIsolate();
   Handle<Type> union_type(PropertyCell::UpdateType(cell, value), isolate);
   bool is_constant = union_type->IsConstant();
   StoreGlobalStub stub(strict_mode, is_constant);
 
   Handle<Code> code = FindIC(
       name, Handle<JSObject>::cast(receiver),
-      Code::STORE_IC, Code::NORMAL, stub.GetExtraICState());
+      Code::STORE_IC, stub.GetExtraICState());
   if (!code.is_null()) return code;
 
   // Replace the placeholder cell and global object map with the actual global
   // cell and receiver map.
   Handle<Map> meta_map(isolate_->heap()->meta_map());
   Handle<Object> receiver_map(receiver->map(), isolate_);
   code = stub.GetCodeCopyFromTemplate(isolate_);
   code->ReplaceNthObject(1, *meta_map, *receiver_map);
   Handle<Map> cell_map(isolate_->heap()->global_property_cell_map());
   code->ReplaceNthObject(1, *cell_map, *cell);
 
   HeapObject::UpdateMapCodeCache(receiver, name, code);
 
   return code;
 }
 
 
 Handle<Code> StubCache::ComputeStoreCallback(
     Handle<Name> name,
     Handle<JSObject> receiver,
     Handle<JSObject> holder,
     Handle<ExecutableAccessorInfo> callback,
     StrictModeFlag strict_mode) {
   ASSERT(v8::ToCData<Address>(callback->setter()) != 0);
   Handle<Code> stub = FindStoreHandler(
-      name, receiver, Code::STORE_IC, Code::CALLBACKS, strict_mode);
+      name, receiver, Code::STORE_IC, strict_mode);
   if (!stub.is_null()) return stub;
 
   StoreStubCompiler compiler(isolate_, strict_mode);
   Handle<Code> handler = compiler.CompileStoreCallback(
       receiver, holder, name, callback);
   HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeStoreCallback(
     Handle<Name> name,
     Handle<JSObject> receiver,
     Handle<JSObject> holder,
     const CallOptimization& call_optimization,
     StrictModeFlag strict_mode) {
   Handle<Code> stub = FindStoreHandler(
-      name, receiver, Code::STORE_IC, Code::CALLBACKS, strict_mode);
+      name, receiver, Code::STORE_IC, strict_mode);
   if (!stub.is_null()) return stub;
 
   StoreStubCompiler compiler(isolate_, strict_mode);
   Handle<Code> handler = compiler.CompileStoreCallback(
       receiver, holder, name, call_optimization);
   HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeStoreViaSetter(Handle<Name> name,
                                               Handle<JSObject> receiver,
                                               Handle<JSObject> holder,
                                               Handle<JSFunction> setter,
                                               StrictModeFlag strict_mode) {
   Handle<Code> stub = FindStoreHandler(
-      name, receiver, Code::STORE_IC, Code::CALLBACKS, strict_mode);
+      name, receiver, Code::STORE_IC, strict_mode);
   if (!stub.is_null()) return stub;
 
   StoreStubCompiler compiler(isolate_, strict_mode);
   Handle<Code> handler = compiler.CompileStoreViaSetter(
       receiver, holder, name, setter);
   HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeStoreInterceptor(Handle<Name> name,
                                                 Handle<JSObject> receiver,
                                                 StrictModeFlag strict_mode) {
   Handle<Code> stub = FindStoreHandler(
-      name, receiver, Code::STORE_IC, Code::INTERCEPTOR, strict_mode);
+      name, receiver, Code::STORE_IC, strict_mode);
   if (!stub.is_null()) return stub;
 
   StoreStubCompiler compiler(isolate_, strict_mode);
   Handle<Code> handler = compiler.CompileStoreInterceptor(receiver, name);
   HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeKeyedStoreField(Handle<Name> name,
                                                Handle<JSObject> receiver,
                                                LookupResult* lookup,
                                                StrictModeFlag strict_mode) {
   Handle<Code> stub = FindStoreHandler(
-      name, receiver, Code::KEYED_STORE_IC, Code::FIELD, strict_mode);
+      name, receiver, Code::KEYED_STORE_IC, strict_mode);
   if (!stub.is_null()) return stub;
 
   KeyedStoreStubCompiler compiler(isolate(), strict_mode, STANDARD_STORE);
   Handle<Code> handler = compiler.CompileStoreField(receiver, lookup, name);
   HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
 Handle<Code> StubCache::ComputeKeyedStoreTransition(
     Handle<Name> name,
     Handle<JSObject> receiver,
     LookupResult* lookup,
     Handle<Map> transition,
     StrictModeFlag strict_mode) {
   Handle<Code> stub = FindStoreHandler(
-      name, receiver, Code::KEYED_STORE_IC, Code::TRANSITION, strict_mode);
+      name, receiver, Code::KEYED_STORE_IC, strict_mode);
   if (!stub.is_null()) return stub;
 
   KeyedStoreStubCompiler compiler(isolate(), strict_mode, STANDARD_STORE);
   Handle<Code> handler =
       compiler.CompileStoreTransition(receiver, lookup, transition, name);
   HeapObject::UpdateMapCodeCache(receiver, name, handler);
   return handler;
 }
 
 
@@ skipping 135 matching lines @@
 
 
 Handle<Code> StubCache::ComputeCallGlobal(int argc,
                                           Code::Kind kind,
                                           Code::ExtraICState extra_state,
                                           Handle<Name> name,
                                           Handle<JSObject> receiver,
                                           Handle<GlobalObject> holder,
                                           Handle<PropertyCell> cell,
                                           Handle<JSFunction> function) {
-  InlineCacheHolderFlag cache_holder =
-      IC::GetCodeCacheForObject(*receiver, *holder);
-  Handle<JSObject> stub_holder(IC::GetCodeCacheHolder(
-      isolate_, *receiver, cache_holder));
   Code::Flags flags = Code::ComputeMonomorphicFlags(
-      kind, extra_state, Code::NORMAL, argc, cache_holder);
-  Handle<Object> probe(stub_holder->map()->FindInCodeCache(*name, flags),
+      kind, extra_state, Code::NORMAL, argc);
+  Handle<Object> probe(receiver->map()->FindInCodeCache(*name, flags),
                        isolate_);
   if (probe->IsCode()) return Handle<Code>::cast(probe);
 
-  CallStubCompiler compiler(isolate(), argc, kind, extra_state, cache_holder);
+  CallStubCompiler compiler(isolate(), argc, kind, extra_state);
   Handle<Code> code =
       compiler.CompileCallGlobal(receiver, holder, cell, function, name);
   ASSERT(flags == code->flags());
   PROFILE(isolate(),
           CodeCreateEvent(CALL_LOGGER_TAG(kind, CALL_IC_TAG), *code, *name));
   GDBJIT(AddCode(GDBJITInterface::CALL_IC, *name, *code));
   if (CallStubCompiler::CanBeCached(function)) {
-    HeapObject::UpdateMapCodeCache(stub_holder, name, code);
+    HeapObject::UpdateMapCodeCache(receiver, name, code);
   }
   return code;
 }
 
 
 static void FillCache(Isolate* isolate, Handle<Code> code) {
   Handle<UnseededNumberDictionary> dictionary =
       UnseededNumberDictionary::Set(isolate->factory()->non_monomorphic_cache(),
                                     code->flags(),
                                     code);
@@ skipping 139 matching lines @@
   FillCache(isolate_, code);
   return code;
 }
 
 
 Handle<Code> StubCache::ComputeCompareNil(Handle<Map> receiver_map,
                                           CompareNilICStub& stub) {
   Handle<String> name(isolate_->heap()->empty_string());
   if (!receiver_map->is_shared()) {
     Handle<Code> cached_ic = FindIC(name, receiver_map, Code::COMPARE_NIL_IC,
-                                    Code::NORMAL, stub.GetExtraICState());
+                                    stub.GetExtraICState());
     if (!cached_ic.is_null()) return cached_ic;
   }
 
   Handle<Code> ic = stub.GetCodeCopyFromTemplate(isolate_);
   ic->ReplaceNthObject(1, isolate_->heap()->meta_map(), *receiver_map);
 
   if (!receiver_map->is_shared()) {
     Map::UpdateCodeCache(receiver_map, name, ic);
   }
 
@@ skipping 16 matching lines @@
       receiver_maps, &handlers, factory()->empty_string(),
       Code::NORMAL, ELEMENT);
 
   isolate()->counters()->keyed_load_polymorphic_stubs()->Increment();
 
   PolymorphicCodeCache::Update(cache, receiver_maps, flags, code);
   return code;
 }
 
 
-Handle<Code> StubCache::ComputePolymorphicLoadIC(MapHandleList* receiver_maps,
-                                                 CodeHandleList* handlers,
-                                                 int number_of_valid_maps,
-                                                 Handle<Name> name) {
-  LoadStubCompiler ic_compiler(isolate_);
-  Code::StubType type = number_of_valid_maps == 1 ? handlers->at(0)->type()
+Handle<Code> StubCache::ComputePolymorphicIC(MapHandleList* receiver_maps,
+                                             CodeHandleList* handlers,
+                                             int number_of_valid_maps,
+                                             Handle<Name> name,
+                                             StrictModeFlag strict_mode) {
+  Handle<Code> handler = handlers->at(0);
+  Code::Kind kind = handler->handler_kind();
+  Code::StubType type = number_of_valid_maps == 1 ? handler->type()
                                                   : Code::NORMAL;
-  Handle<Code> ic = ic_compiler.CompilePolymorphicIC(
-      receiver_maps, handlers, name, type, PROPERTY);
-  return ic;
+  if (kind == Code::LOAD_IC) {
+    LoadStubCompiler ic_compiler(isolate_);
+    return ic_compiler.CompilePolymorphicIC(
+        receiver_maps, handlers, name, type, PROPERTY);
+  } else {
+    ASSERT(kind == Code::STORE_IC);
+    StoreStubCompiler ic_compiler(isolate_, strict_mode);
+    return ic_compiler.CompilePolymorphicIC(
+        receiver_maps, handlers, name, type, PROPERTY);
+  }
 }
 
 
-Handle<Code> StubCache::ComputePolymorphicStoreIC(MapHandleList* receiver_maps,
-                                                  CodeHandleList* handlers,
-                                                  int number_of_valid_maps,
-                                                  Handle<Name> name,
-                                                  StrictModeFlag strict_mode) {
-  StoreStubCompiler ic_compiler(isolate_, strict_mode);
-  Code::StubType type = number_of_valid_maps == 1 ? handlers->at(0)->type()
-                                                  : Code::NORMAL;
-  Handle<Code> ic = ic_compiler.CompilePolymorphicIC(
-      receiver_maps, handlers, name, type, PROPERTY);
-  return ic;
-}
-
-
 Handle<Code> StubCache::ComputeStoreElementPolymorphic(
     MapHandleList* receiver_maps,
     KeyedAccessStoreMode store_mode,
     StrictModeFlag strict_mode) {
   ASSERT(store_mode == STANDARD_STORE ||
          store_mode == STORE_AND_GROW_NO_TRANSITION ||
          store_mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS ||
          store_mode == STORE_NO_TRANSITION_HANDLE_COW);
   Handle<PolymorphicCodeCache> cache =
       isolate_->factory()->polymorphic_code_cache();
@@ skipping 180 matching lines @@
   }
 
   return isolate->heap()->no_interceptor_result_sentinel();
 }
 
 
 static MaybeObject* ThrowReferenceError(Isolate* isolate, Name* name) {
   // If the load is non-contextual, just return the undefined result.
   // Note that both keyed and non-keyed loads may end up here, so we
   // can't use either LoadIC or KeyedLoadIC constructors.
+  HandleScope scope(isolate);
   IC ic(IC::NO_EXTRA_FRAME, isolate);
   ASSERT(ic.target()->is_load_stub() || ic.target()->is_keyed_load_stub());
   if (!ic.SlowIsUndeclaredGlobal()) return isolate->heap()->undefined_value();
 
   // Throw a reference error.
-  HandleScope scope(isolate);
   Handle<Name> name_handle(name);
   Handle<Object> error =
       isolate->factory()->NewReferenceError("not_defined",
                                             HandleVector(&name_handle, 1));
   return isolate->Throw(*error);
 }
 
 
 static MaybeObject* LoadWithInterceptor(Arguments* args,
                                         PropertyAttributes* attrs) {
@@ skipping 648 matching lines @@
 
 void KeyedStoreStubCompiler::JitEvent(Handle<Name> name, Handle<Code> code) {
   GDBJIT(AddCode(GDBJITInterface::KEYED_STORE_IC, *name, *code));
 }
 
 
 Handle<Code> BaseLoadStoreStubCompiler::GetICCode(Code::Kind kind,
                                                   Code::StubType type,
                                                   Handle<Name> name,
                                                   InlineCacheState state) {
-  Code::Flags flags = Code::ComputeFlags(
-      kind, state, extra_state(), type);
+  Code::Flags flags = Code::ComputeFlags(kind, state, extra_state(), type);
   Handle<Code> code = GetCodeWithFlags(flags, name);
   PROFILE(isolate(), CodeCreateEvent(log_kind(code), *code, *name));
   JitEvent(name, code);
   return code;
 }
 
 
-Handle<Code> BaseLoadStubCompiler::GetCode(Code::Kind kind,
-                                           Code::StubType type,
-                                           Handle<Name> name) {
+Handle<Code> BaseLoadStoreStubCompiler::GetCode(Code::Kind kind,
+                                                Code::StubType type,
+                                                Handle<Name> name) {
   ASSERT(type != Code::NORMAL);
   Code::Flags flags = Code::ComputeFlags(
-      Code::STUB, MONOMORPHIC, Code::kNoExtraICState, type, kind);
+      Code::HANDLER, MONOMORPHIC, extra_state(), type, kind);
   Handle<Code> code = GetCodeWithFlags(flags, name);
   PROFILE(isolate(), CodeCreateEvent(log_kind(code), *code, *name));
   JitEvent(name, code);
-  return code;
-}
-
-
-Handle<Code> BaseStoreStubCompiler::GetCode(Code::Kind kind,
-                                            Code::StubType type,
-                                            Handle<Name> name) {
-  ASSERT(type != Code::NORMAL);
-  Code::Flags flags = Code::ComputeFlags(
-      Code::STUB, MONOMORPHIC, extra_state(), type, kind);
-  Handle<Code> code = GetCodeWithFlags(flags, name);
-  PROFILE(isolate(), CodeCreateEvent(log_kind(code), *code, *name));
-  JitEvent(name, code);
   return code;
 }
 
 
 void KeyedLoadStubCompiler::CompileElementHandlers(MapHandleList* receiver_maps,
                                                    CodeHandleList* handlers) {
   for (int i = 0; i < receiver_maps->length(); ++i) {
     Handle<Map> receiver_map = receiver_maps->at(i);
     Handle<Code> cached_stub;
 
@@ skipping 236 matching lines @@
           Handle<FunctionTemplateInfo>(
               FunctionTemplateInfo::cast(signature->receiver()));
     }
   }
 
   is_simple_api_call_ = true;
 }
 
 
 } }  // namespace v8::internal