[ic] Migrate Code-based handlers to use data driven handler.

All usage of KeyedLoadIC_Slow, HasIC_Slow, StoreInArrayLiteralIC_Slow
and KeyedStoreIC_Slow now use data driven handlers

Bug: v8:9779
Change-Id: Idd888c5c10b462a5fe155ba0add36f95169bd76d
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1895988Reviewed-by: Toon Verwaest <verwaest@chromium.org>
Reviewed-by: Ross McIlroy <rmcilroy@chromium.org>
Commit-Queue: Suraj Sharma <surshar@microsoft.com>
Cr-Commit-Position: refs/heads/master@{#64918}

src/builtins/builtins-definitions.h

@@ -215,9 +215,7 @@ namespace internal {
                                                                                \
   /* Handlers */                                                               \
   TFH(KeyedLoadIC_PolymorphicName, LoadWithVector)                             \
-  TFH(KeyedLoadIC_Slow, LoadWithVector)                                        \
   TFH(KeyedStoreIC_Megamorphic, Store)                                         \
-  TFH(KeyedStoreIC_Slow, StoreWithVector)                                      \
   TFH(LoadGlobalIC_NoFeedback, LoadGlobalNoFeedback)                           \
   TFH(LoadIC_FunctionPrototype, LoadWithVector)                                \
   TFH(LoadIC_StringLength, LoadWithVector)                                     \
@@ -225,25 +223,16 @@ namespace internal {
   TFH(LoadIC_NoFeedback, LoadNoFeedback)                                       \
   TFH(StoreGlobalIC_Slow, StoreWithVector)                                     \
   TFH(StoreIC_NoFeedback, Store)                                               \
-  TFH(StoreInArrayLiteralIC_Slow, StoreWithVector)                             \
   TFH(KeyedLoadIC_SloppyArguments, LoadWithVector)                             \
   TFH(LoadIndexedInterceptorIC, LoadWithVector)                                \
   TFH(KeyedStoreIC_SloppyArguments_Standard, StoreWithVector)                  \
   TFH(KeyedStoreIC_SloppyArguments_GrowNoTransitionHandleCOW, StoreWithVector) \
   TFH(KeyedStoreIC_SloppyArguments_NoTransitionIgnoreOOB, StoreWithVector)     \
   TFH(KeyedStoreIC_SloppyArguments_NoTransitionHandleCOW, StoreWithVector)     \
-  TFH(StoreInArrayLiteralIC_Slow_Standard, StoreWithVector)                    \
   TFH(StoreFastElementIC_Standard, StoreWithVector)                            \
   TFH(StoreFastElementIC_GrowNoTransitionHandleCOW, StoreWithVector)           \
   TFH(StoreFastElementIC_NoTransitionIgnoreOOB, StoreWithVector)               \
   TFH(StoreFastElementIC_NoTransitionHandleCOW, StoreWithVector)               \
-  TFH(StoreInArrayLiteralIC_Slow_GrowNoTransitionHandleCOW, StoreWithVector)   \
-  TFH(StoreInArrayLiteralIC_Slow_NoTransitionIgnoreOOB, StoreWithVector)       \
-  TFH(StoreInArrayLiteralIC_Slow_NoTransitionHandleCOW, StoreWithVector)       \
-  TFH(KeyedStoreIC_Slow_Standard, StoreWithVector)                             \
-  TFH(KeyedStoreIC_Slow_GrowNoTransitionHandleCOW, StoreWithVector)            \
-  TFH(KeyedStoreIC_Slow_NoTransitionIgnoreOOB, StoreWithVector)                \
-  TFH(KeyedStoreIC_Slow_NoTransitionHandleCOW, StoreWithVector)                \
   TFH(ElementsTransitionAndStore_Standard, StoreTransition)                    \
   TFH(ElementsTransitionAndStore_GrowNoTransitionHandleCOW, StoreTransition)   \
   TFH(ElementsTransitionAndStore_NoTransitionIgnoreOOB, StoreTransition)       \
@@ -251,7 +240,6 @@ namespace internal {
   TFH(KeyedHasIC_PolymorphicName, LoadWithVector)                              \
   TFH(KeyedHasIC_SloppyArguments, LoadWithVector)                              \
   TFH(HasIndexedInterceptorIC, LoadWithVector)                                 \
-  TFH(HasIC_Slow, LoadWithVector)                                              \
                                                                                \
   /* Microtask helpers */                                                      \
   TFS(EnqueueMicrotask, kMicrotask)                                            \

src/builtins/builtins-handler-gen.cc

@@ -20,8 +20,6 @@ class HandlerBuiltinsAssembler : public CodeStubAssembler {
 
  protected:
   void Generate_KeyedStoreIC_SloppyArguments();
-  void Generate_KeyedStoreIC_Slow();
-  void Generate_StoreInArrayLiteralIC_Slow();
 
   // Essentially turns runtime elements kinds (TNode<Int32T>) into
   // compile-time types (int) by dispatching over the runtime type and
@@ -202,14 +200,6 @@ TF_BUILTIN(LoadIC_StringWrapperLength, CodeStubAssembler) {
   Return(LoadStringLengthAsSmi(string));
 }
 
-TF_BUILTIN(KeyedLoadIC_Slow, CodeStubAssembler) {
-  TNode<Object> receiver = CAST(Parameter(Descriptor::kReceiver));
-  TNode<Object> name = CAST(Parameter(Descriptor::kName));
-  TNode<Context> context = CAST(Parameter(Descriptor::kContext));
-
-  TailCallRuntime(Runtime::kGetProperty, context, receiver, name);
-}
-
 void Builtins::Generate_KeyedStoreIC_Megamorphic(
     compiler::CodeAssemblerState* state) {
   KeyedStoreGenericGenerator::Generate(state);
@@ -220,74 +210,6 @@ void Builtins::Generate_StoreIC_NoFeedback(
   StoreICNoFeedbackGenerator::Generate(state);
 }
 
-// TODO(mythria): Create a Descriptor without feedback vector and slot
-// parameters.
-void HandlerBuiltinsAssembler::Generate_KeyedStoreIC_Slow() {
-  using Descriptor = StoreWithVectorDescriptor;
-  TNode<Object> receiver = CAST(Parameter(Descriptor::kReceiver));
-  TNode<Object> name = CAST(Parameter(Descriptor::kName));
-  TNode<Object> value = CAST(Parameter(Descriptor::kValue));
-  TNode<Context> context = CAST(Parameter(Descriptor::kContext));
-
-  // The slow case calls into the runtime to complete the store without causing
-  // an IC miss that would otherwise cause a transition to the generic stub.
-  TailCallRuntime(Runtime::kKeyedStoreIC_Slow, context, value, receiver, name);
-}
-
-TF_BUILTIN(KeyedStoreIC_Slow, HandlerBuiltinsAssembler) {
-  Generate_KeyedStoreIC_Slow();
-}
-
-TF_BUILTIN(KeyedStoreIC_Slow_Standard, HandlerBuiltinsAssembler) {
-  Generate_KeyedStoreIC_Slow();
-}
-
-TF_BUILTIN(KeyedStoreIC_Slow_GrowNoTransitionHandleCOW,
-           HandlerBuiltinsAssembler) {
-  Generate_KeyedStoreIC_Slow();
-}
-
-TF_BUILTIN(KeyedStoreIC_Slow_NoTransitionIgnoreOOB, HandlerBuiltinsAssembler) {
-  Generate_KeyedStoreIC_Slow();
-}
-
-TF_BUILTIN(KeyedStoreIC_Slow_NoTransitionHandleCOW, HandlerBuiltinsAssembler) {
-  Generate_KeyedStoreIC_Slow();
-}
-
-void HandlerBuiltinsAssembler::Generate_StoreInArrayLiteralIC_Slow() {
-  using Descriptor = StoreWithVectorDescriptor;
-  TNode<JSArray> array = CAST(Parameter(Descriptor::kReceiver));
-  TNode<Object> index = CAST(Parameter(Descriptor::kName));
-  TNode<Object> value = CAST(Parameter(Descriptor::kValue));
-  TNode<Context> context = CAST(Parameter(Descriptor::kContext));
-  TailCallRuntime(Runtime::kStoreInArrayLiteralIC_Slow, context, value, array,
-                  index);
-}
-
-TF_BUILTIN(StoreInArrayLiteralIC_Slow, HandlerBuiltinsAssembler) {
-  Generate_StoreInArrayLiteralIC_Slow();
-}
-
-TF_BUILTIN(StoreInArrayLiteralIC_Slow_Standard, HandlerBuiltinsAssembler) {
-  Generate_StoreInArrayLiteralIC_Slow();
-}
-
-TF_BUILTIN(StoreInArrayLiteralIC_Slow_GrowNoTransitionHandleCOW,
-           HandlerBuiltinsAssembler) {
-  Generate_StoreInArrayLiteralIC_Slow();
-}
-
-TF_BUILTIN(StoreInArrayLiteralIC_Slow_NoTransitionIgnoreOOB,
-           HandlerBuiltinsAssembler) {
-  Generate_StoreInArrayLiteralIC_Slow();
-}
-
-TF_BUILTIN(StoreInArrayLiteralIC_Slow_NoTransitionHandleCOW,
-           HandlerBuiltinsAssembler) {
-  Generate_StoreInArrayLiteralIC_Slow();
-}
-
 // All possible fast-to-fast transitions. Transitions to dictionary mode are not
 // handled by ElementsTransitionAndStore.
 #define ELEMENTS_KIND_TRANSITIONS(V)               \
@@ -676,13 +598,5 @@ TF_BUILTIN(HasIndexedInterceptorIC, CodeStubAssembler) {
                   vector);
 }
 
-TF_BUILTIN(HasIC_Slow, CodeStubAssembler) {
-  TNode<Object> receiver = CAST(Parameter(Descriptor::kReceiver));
-  TNode<Object> name = CAST(Parameter(Descriptor::kName));
-  TNode<Context> context = CAST(Parameter(Descriptor::kContext));
-
-  TailCallRuntime(Runtime::kHasProperty, context, receiver, name);
-}
-
 }  // namespace internal
 }  // namespace v8

src/codegen/code-factory.cc

@@ -122,53 +122,6 @@ Callable CodeFactory::KeyedStoreIC_SloppyArguments(Isolate* isolate,
   return isolate->builtins()->CallableFor(isolate, builtin_index);
 }
 
-Callable CodeFactory::KeyedStoreIC_Slow(Isolate* isolate,
-                                        KeyedAccessStoreMode mode) {
-  Builtins::Name builtin_index;
-  switch (mode) {
-    case STANDARD_STORE:
-      builtin_index = Builtins::kKeyedStoreIC_Slow_Standard;
-      break;
-    case STORE_AND_GROW_HANDLE_COW:
-      builtin_index = Builtins::kKeyedStoreIC_Slow_GrowNoTransitionHandleCOW;
-      break;
-    case STORE_IGNORE_OUT_OF_BOUNDS:
-      builtin_index = Builtins::kKeyedStoreIC_Slow_NoTransitionIgnoreOOB;
-      break;
-    case STORE_HANDLE_COW:
-      builtin_index = Builtins::kKeyedStoreIC_Slow_NoTransitionHandleCOW;
-      break;
-    default:
-      UNREACHABLE();
-  }
-  return isolate->builtins()->CallableFor(isolate, builtin_index);
-}
-
-Callable CodeFactory::StoreInArrayLiteralIC_Slow(Isolate* isolate,
-                                                 KeyedAccessStoreMode mode) {
-  Builtins::Name builtin_index;
-  switch (mode) {
-    case STANDARD_STORE:
-      builtin_index = Builtins::kStoreInArrayLiteralIC_Slow_Standard;
-      break;
-    case STORE_AND_GROW_HANDLE_COW:
-      builtin_index =
-          Builtins::kStoreInArrayLiteralIC_Slow_GrowNoTransitionHandleCOW;
-      break;
-    case STORE_IGNORE_OUT_OF_BOUNDS:
-      builtin_index =
-          Builtins::kStoreInArrayLiteralIC_Slow_NoTransitionIgnoreOOB;
-      break;
-    case STORE_HANDLE_COW:
-      builtin_index =
-          Builtins::kStoreInArrayLiteralIC_Slow_NoTransitionHandleCOW;
-      break;
-    default:
-      UNREACHABLE();
-  }
-  return isolate->builtins()->CallableFor(isolate, builtin_index);
-}
-
 Callable CodeFactory::ElementsTransitionAndStore(Isolate* isolate,
                                                  KeyedAccessStoreMode mode) {
   Builtins::Name builtin_index;

src/codegen/code-factory.h

@@ -42,10 +42,6 @@ class V8_EXPORT_PRIVATE CodeFactory final {
 
   static Callable KeyedStoreIC_SloppyArguments(Isolate* isolate,
                                                KeyedAccessStoreMode mode);
-  static Callable KeyedStoreIC_Slow(Isolate* isolate,
-                                    KeyedAccessStoreMode mode);
-  static Callable StoreInArrayLiteralIC_Slow(Isolate* isolate,
-                                             KeyedAccessStoreMode mode);
   static Callable ElementsTransitionAndStore(Isolate* isolate,
                                              KeyedAccessStoreMode mode);
   static Callable StoreFastElementIC(Isolate* isolate,

src/ic/accessor-assembler.cc

@@ -1564,6 +1564,9 @@ void AccessorAssembler::HandleStoreICProtoHandler(
     GotoIf(Word32Equal(handler_kind, Int32Constant(StoreHandler::kNormal)),
            &if_add_normal);
 
+    GotoIf(Word32Equal(handler_kind, Int32Constant(StoreHandler::kSlow)),
+           &if_slow);
+
     TNode<MaybeObject> maybe_holder = LoadHandlerDataField(handler, 1);
     CSA_ASSERT(this, IsWeakOrCleared(maybe_holder));
     TNode<HeapObject> holder = GetHeapObjectAssumeWeak(maybe_holder, miss);
@@ -1581,9 +1584,6 @@ void AccessorAssembler::HandleStoreICProtoHandler(
     GotoIf(Word32Equal(handler_kind, Int32Constant(StoreHandler::kApiSetter)),
            &if_api_setter);
 
-    GotoIf(Word32Equal(handler_kind, Int32Constant(StoreHandler::kSlow)),
-           &if_slow);
-
     GotoIf(Word32Equal(handler_kind, Int32Constant(StoreHandler::kInterceptor)),
            &if_interceptor);
 

src/ic/handler-configuration-inl.h

@@ -137,8 +137,10 @@ Handle<Smi> StoreHandler::StoreInterceptor(Isolate* isolate) {
   return handle(Smi::FromInt(config), isolate);
 }
 
-Handle<Smi> StoreHandler::StoreSlow(Isolate* isolate) {
-  int config = KindBits::encode(kSlow);
+Handle<Smi> StoreHandler::StoreSlow(Isolate* isolate,
+                                    KeyedAccessStoreMode store_mode) {
+  int config =
+      KindBits::encode(kSlow) | KeyedAccessStoreModeBits::encode(store_mode);
   return handle(Smi::FromInt(config), isolate);
 }
 

src/ic/handler-configuration.cc

@@ -176,6 +176,19 @@ KeyedAccessLoadMode LoadHandler::GetKeyedAccessLoadMode(MaybeObject handler) {
   return STANDARD_LOAD;
 }
 
+// static
+KeyedAccessStoreMode StoreHandler::GetKeyedAccessStoreMode(
+    MaybeObject handler) {
+  DisallowHeapAllocation no_gc;
+  if (handler->IsSmi()) {
+    int const raw_handler = handler.ToSmi().value();
+    KeyedAccessStoreMode store_mode =
+        KeyedAccessStoreModeBits::decode(raw_handler);
+    return store_mode;
+  }
+  return STANDARD_STORE;
+}
+
 // static
 Handle<Object> StoreHandler::StoreElementTransition(
     Isolate* isolate, Handle<Map> receiver_map, Handle<Map> transition,

src/ic/handler-configuration.h

@@ -224,6 +224,13 @@ class StoreHandler final : public DataHandler {
   // Index of a value entry in the descriptor array.
   using DescriptorBits =
       LookupOnReceiverBits::Next<unsigned, kDescriptorIndexBitCount>;
+
+  //
+  // Encodes the bits when StoreSlow contains KeyedAccessStoreMode.
+  //
+  using KeyedAccessStoreModeBits =
+      DescriptorBits::Next<KeyedAccessStoreMode, 2>;
+
   //
   // Encoding when KindBits contains kTransitionToConstant.
   //
@@ -291,11 +298,15 @@ class StoreHandler final : public DataHandler {
   static inline Handle<Smi> StoreInterceptor(Isolate* isolate);
 
   // Creates a Smi-handler for storing a property.
-  static inline Handle<Smi> StoreSlow(Isolate* isolate);
+  static inline Handle<Smi> StoreSlow(
+      Isolate* isolate, KeyedAccessStoreMode store_mode = STANDARD_STORE);
 
   // Creates a Smi-handler for storing a property on a proxy.
   static inline Handle<Smi> StoreProxy(Isolate* isolate);
 
+  // Decodes the KeyedAccessStoreMode from a {handler}.
+  static KeyedAccessStoreMode GetKeyedAccessStoreMode(MaybeObject handler);
+
  private:
   static inline Handle<Smi> StoreField(Isolate* isolate, Kind kind,
                                        int descriptor, FieldIndex field_index,

src/ic/ic.cc

@@ -1133,13 +1133,12 @@ Handle<Object> KeyedLoadIC::LoadElementHandler(Handle<Map> receiver_map,
   InstanceType instance_type = receiver_map->instance_type();
   if (instance_type < FIRST_NONSTRING_TYPE) {
     TRACE_HANDLER_STATS(isolate(), KeyedLoadIC_LoadIndexedStringDH);
-    if (IsAnyHas()) return BUILTIN_CODE(isolate(), HasIC_Slow);
+    if (IsAnyHas()) return LoadHandler::LoadSlow(isolate());
     return LoadHandler::LoadIndexedString(isolate(), load_mode);
   }
   if (instance_type < FIRST_JS_RECEIVER_TYPE) {
     TRACE_HANDLER_STATS(isolate(), KeyedLoadIC_SlowStub);
-    return IsAnyHas() ? BUILTIN_CODE(isolate(), HasIC_Slow)
-                      : BUILTIN_CODE(isolate(), KeyedLoadIC_Slow);
+    return LoadHandler::LoadSlow(isolate());
   }
   if (instance_type == JS_PROXY_TYPE) {
     return LoadHandler::LoadProxy(isolate());
@@ -1871,7 +1870,7 @@ Handle<Object> KeyedStoreIC::StoreElementHandler(
   }
 
   // TODO(ishell): move to StoreHandler::StoreElement().
-  Handle<Code> code;
+  Handle<Object> code;
   if (receiver_map->has_sloppy_arguments_elements()) {
     // TODO(jgruber): Update counter name.
     TRACE_HANDLER_STATS(isolate(), KeyedStoreIC_KeyedStoreSloppyArgumentsStub);
@@ -1887,18 +1886,16 @@ Handle<Object> KeyedStoreIC::StoreElementHandler(
   } else if (IsStoreInArrayLiteralICKind(kind())) {
     // TODO(jgruber): Update counter name.
     TRACE_HANDLER_STATS(isolate(), StoreInArrayLiteralIC_SlowStub);
-    code =
-        CodeFactory::StoreInArrayLiteralIC_Slow(isolate(), store_mode).code();
+    return StoreHandler::StoreSlow(isolate(), store_mode);
   } else {
     // TODO(jgruber): Update counter name.
     TRACE_HANDLER_STATS(isolate(), KeyedStoreIC_StoreElementStub);
     DCHECK(DICTIONARY_ELEMENTS == receiver_map->elements_kind() ||
            receiver_map->has_frozen_elements());
-    code = CodeFactory::KeyedStoreIC_Slow(isolate(), store_mode).code();
+    code = StoreHandler::StoreSlow(isolate(), store_mode);
   }
 
   if (IsStoreInArrayLiteralICKind(kind())) return code;
-
   Handle<Object> validity_cell =
       Map::GetOrCreatePrototypeChainValidityCell(receiver_map, isolate());
   if (validity_cell->IsSmi()) {

src/objects/feedback-vector.cc

@@ -1105,14 +1105,6 @@ bool BuiltinHasKeyedAccessStoreMode(int builtin_index) {
     case Builtins::kStoreFastElementIC_GrowNoTransitionHandleCOW:
     case Builtins::kStoreFastElementIC_NoTransitionIgnoreOOB:
     case Builtins::kStoreFastElementIC_NoTransitionHandleCOW:
-    case Builtins::kStoreInArrayLiteralIC_Slow_Standard:
-    case Builtins::kStoreInArrayLiteralIC_Slow_GrowNoTransitionHandleCOW:
-    case Builtins::kStoreInArrayLiteralIC_Slow_NoTransitionIgnoreOOB:
-    case Builtins::kStoreInArrayLiteralIC_Slow_NoTransitionHandleCOW:
-    case Builtins::kKeyedStoreIC_Slow_Standard:
-    case Builtins::kKeyedStoreIC_Slow_GrowNoTransitionHandleCOW:
-    case Builtins::kKeyedStoreIC_Slow_NoTransitionIgnoreOOB:
-    case Builtins::kKeyedStoreIC_Slow_NoTransitionHandleCOW:
     case Builtins::kElementsTransitionAndStore_Standard:
     case Builtins::kElementsTransitionAndStore_GrowNoTransitionHandleCOW:
     case Builtins::kElementsTransitionAndStore_NoTransitionIgnoreOOB:
@@ -1128,26 +1120,18 @@ KeyedAccessStoreMode KeyedAccessStoreModeForBuiltin(int builtin_index) {
   DCHECK(BuiltinHasKeyedAccessStoreMode(builtin_index));
   switch (builtin_index) {
     case Builtins::kKeyedStoreIC_SloppyArguments_Standard:
-    case Builtins::kStoreInArrayLiteralIC_Slow_Standard:
-    case Builtins::kKeyedStoreIC_Slow_Standard:
     case Builtins::kStoreFastElementIC_Standard:
     case Builtins::kElementsTransitionAndStore_Standard:
       return STANDARD_STORE;
     case Builtins::kKeyedStoreIC_SloppyArguments_GrowNoTransitionHandleCOW:
-    case Builtins::kStoreInArrayLiteralIC_Slow_GrowNoTransitionHandleCOW:
-    case Builtins::kKeyedStoreIC_Slow_GrowNoTransitionHandleCOW:
     case Builtins::kStoreFastElementIC_GrowNoTransitionHandleCOW:
     case Builtins::kElementsTransitionAndStore_GrowNoTransitionHandleCOW:
       return STORE_AND_GROW_HANDLE_COW;
     case Builtins::kKeyedStoreIC_SloppyArguments_NoTransitionIgnoreOOB:
-    case Builtins::kStoreInArrayLiteralIC_Slow_NoTransitionIgnoreOOB:
-    case Builtins::kKeyedStoreIC_Slow_NoTransitionIgnoreOOB:
     case Builtins::kStoreFastElementIC_NoTransitionIgnoreOOB:
     case Builtins::kElementsTransitionAndStore_NoTransitionIgnoreOOB:
       return STORE_IGNORE_OUT_OF_BOUNDS;
     case Builtins::kKeyedStoreIC_SloppyArguments_NoTransitionHandleCOW:
-    case Builtins::kStoreInArrayLiteralIC_Slow_NoTransitionHandleCOW:
-    case Builtins::kKeyedStoreIC_Slow_NoTransitionHandleCOW:
     case Builtins::kStoreFastElementIC_NoTransitionHandleCOW:
     case Builtins::kElementsTransitionAndStore_NoTransitionHandleCOW:
       return STORE_HANDLE_COW;
@@ -1174,14 +1158,29 @@ KeyedAccessStoreMode FeedbackNexus::GetKeyedAccessStoreMode() const {
     if (maybe_code_handler.object()->IsStoreHandler()) {
       Handle<StoreHandler> data_handler =
           Handle<StoreHandler>::cast(maybe_code_handler.object());
-      handler = handle(Code::cast(data_handler->smi_handler()),
-                       vector().GetIsolate());
+
+      if ((data_handler->smi_handler()).IsSmi()) {
+        // Decode the KeyedAccessStoreMode information from the Handler.
+        mode = StoreHandler::GetKeyedAccessStoreMode(
+            MaybeObject::FromObject(data_handler->smi_handler()));
+        if (mode != STANDARD_STORE) return mode;
+        continue;
+      } else {
+        handler = handle(Code::cast(data_handler->smi_handler()),
+                         vector().GetIsolate());
+      }
+
     } else if (maybe_code_handler.object()->IsSmi()) {
-      // Skip proxy handlers and the slow handler.
+      // Skip for Proxy Handlers.
+      if (*(maybe_code_handler.object()) ==
+          *StoreHandler::StoreProxy(GetIsolate()))
+        continue;
+      // Verify it is Slow handler
       DCHECK(*(maybe_code_handler.object()) ==
-                 *StoreHandler::StoreProxy(GetIsolate()) ||
-             *(maybe_code_handler.object()) ==
                  *StoreHandler::StoreSlow(GetIsolate()));
+      // Decode the KeyedAccessStoreMode information from the Handler.
+      mode = StoreHandler::GetKeyedAccessStoreMode(*maybe_code_handler);
+      if (mode != STANDARD_STORE) return mode;
       continue;
     } else {
       // Element store without prototype chain check.

test/cctest/test-heap-profiler.cc

@@ -2723,7 +2723,7 @@ TEST(CheckCodeNames) {
   CHECK(ValidateSnapshot(snapshot));
 
   const char* builtin_path1[] = {"::(GC roots)", "::(Builtins)",
-                                 "::(KeyedLoadIC_Slow builtin)"};
+                                 "::(KeyedLoadIC_PolymorphicName builtin)"};
   const v8::HeapGraphNode* node = GetNodeByPath(
       env->GetIsolate(), snapshot, builtin_path1, arraysize(builtin_path1));
   CHECK(node);