Reland of [stubs] Port KeyedLoadIC_Generic stub to TurboFan

src/ic/handler-compiler.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/ic/handler-compiler.h"
 
 #include "src/field-type.h"
 #include "src/ic/call-optimization.h"
 #include "src/ic/handler-configuration.h"
 #include "src/ic/ic-inl.h"
@@ skipping 583 matching lines @@
   if (instance_type < FIRST_JS_RECEIVER_TYPE) {
     TRACE_HANDLER_STATS(isolate, KeyedLoadIC_SlowStub);
     return isolate->builtins()->KeyedLoadIC_Slow();
   }
 
   ElementsKind elements_kind = receiver_map->elements_kind();
   if (IsSloppyArgumentsElements(elements_kind)) {
     TRACE_HANDLER_STATS(isolate, KeyedLoadIC_KeyedLoadSloppyArgumentsStub);
     return KeyedLoadSloppyArgumentsStub(isolate).GetCode();
   }
+  bool is_js_array = instance_type == JS_ARRAY_TYPE;
   if (elements_kind == DICTIONARY_ELEMENTS) {
+    if (FLAG_tf_load_ic_stub) {
+      int config = KeyedLoadElementsKind::encode(elements_kind) |
+                   KeyedLoadConvertHole::encode(false) |
+                   KeyedLoadIsJsArray::encode(is_js_array) |
+                   LoadHandlerTypeBit::encode(kLoadICHandlerForElements);
+      return handle(Smi::FromInt(config), isolate);
+    }
     TRACE_HANDLER_STATS(isolate, KeyedLoadIC_LoadDictionaryElementStub);
     return LoadDictionaryElementStub(isolate).GetCode();
   }
   DCHECK(IsFastElementsKind(elements_kind) ||
          IsFixedTypedArrayElementsKind(elements_kind));
-  bool is_js_array = instance_type == JS_ARRAY_TYPE;
+  // TODO(jkummerow): Use IsHoleyElementsKind(elements_kind).
   bool convert_hole_to_undefined =
       is_js_array && elements_kind == FAST_HOLEY_ELEMENTS &&
       *receiver_map == isolate->get_initial_js_array_map(elements_kind);
   if (FLAG_tf_load_ic_stub) {
     int config = KeyedLoadElementsKind::encode(elements_kind) |
                  KeyedLoadConvertHole::encode(convert_hole_to_undefined) |
                  KeyedLoadIsJsArray::encode(is_js_array) |
                  LoadHandlerTypeBit::encode(kLoadICHandlerForElements);
     return handle(Smi::FromInt(config), isolate);
   } else {
     TRACE_HANDLER_STATS(isolate, KeyedLoadIC_LoadFastElementStub);
     return LoadFastElementStub(isolate, is_js_array, elements_kind,
                                convert_hole_to_undefined)
         .GetCode();
   }
 }
 
 void ElementHandlerCompiler::CompileElementHandlers(
     MapHandleList* receiver_maps, List<Handle<Object>>* handlers) {
   for (int i = 0; i < receiver_maps->length(); ++i) {
     handlers->Add(GetKeyedLoadHandler(receiver_maps->at(i), isolate()));
   }
 }
 }  // namespace internal
 }  // namespace v8