Remove strong mode support from property loads.

src/runtime/runtime-classes.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/runtime/runtime-utils.h"
 
 #include <stdlib.h>
 #include <limits>
 
 #include "src/arguments.h"
@@ skipping 86 matching lines @@
       if (super_class->IsJSFunction() &&
           Handle<JSFunction>::cast(super_class)->shared()->is_generator()) {
         THROW_NEW_ERROR(
             isolate,
             NewTypeError(MessageTemplate::kExtendsValueGenerator, super_class),
             Object);
       }
       ASSIGN_RETURN_ON_EXCEPTION(
           isolate, prototype_parent,
           Runtime::GetObjectProperty(isolate, super_class,
-                                     isolate->factory()->prototype_string(),
-                                     SLOPPY),
+                                     isolate->factory()->prototype_string()),
           Object);
       if (!prototype_parent->IsNull() && !prototype_parent->IsJSReceiver()) {
         THROW_NEW_ERROR(
             isolate, NewTypeError(MessageTemplate::kPrototypeParentNotAnObject,
                                   prototype_parent),
             Object);
       }
       constructor_parent = super_class;
     } else {
       THROW_NEW_ERROR(
@@ skipping 97 matching lines @@
     MAYBE_RETURN(JSReceiver::SetIntegrityLevel(prototype, FROZEN,
                                                Object::THROW_ON_ERROR),
                  isolate->heap()->exception());
     MAYBE_RETURN(JSReceiver::SetIntegrityLevel(constructor, FROZEN,
                                                Object::THROW_ON_ERROR),
                  isolate->heap()->exception());
   }
   return *constructor;
 }
 
-
 static MaybeHandle<Object> LoadFromSuper(Isolate* isolate,
                                          Handle<Object> receiver,
                                          Handle<JSObject> home_object,
-                                         Handle<Name> name,
-                                         LanguageMode language_mode) {
+                                         Handle<Name> name) {
   if (home_object->IsAccessCheckNeeded() &&
       !isolate->MayAccess(handle(isolate->context()), home_object)) {
     isolate->ReportFailedAccessCheck(home_object);
     RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, Object);
   }
 
   PrototypeIterator iter(isolate, home_object);
   Handle<Object> proto = PrototypeIterator::GetCurrent(iter);
   if (!proto->IsJSReceiver()) {
-    return Object::ReadAbsentProperty(isolate, proto, name, language_mode);
+    return Object::ReadAbsentProperty(isolate, proto, name);
   }
 
   LookupIterator it(receiver, name, Handle<JSReceiver>::cast(proto));
   Handle<Object> result;
-  ASSIGN_RETURN_ON_EXCEPTION(isolate, result,
-                             Object::GetProperty(&it, language_mode), Object);
+  ASSIGN_RETURN_ON_EXCEPTION(isolate, result, Object::GetProperty(&it), Object);
   return result;
 }
 
-
 static MaybeHandle<Object> LoadElementFromSuper(Isolate* isolate,
                                                 Handle<Object> receiver,
                                                 Handle<JSObject> home_object,
-                                                uint32_t index,
-                                                LanguageMode language_mode) {
+                                                uint32_t index) {
   if (home_object->IsAccessCheckNeeded() &&
       !isolate->MayAccess(handle(isolate->context()), home_object)) {
     isolate->ReportFailedAccessCheck(home_object);
     RETURN_EXCEPTION_IF_SCHEDULED_EXCEPTION(isolate, Object);
   }
 
   PrototypeIterator iter(isolate, home_object);
   Handle<Object> proto = PrototypeIterator::GetCurrent(iter);
   if (!proto->IsJSReceiver()) {
     Handle<Object> name = isolate->factory()->NewNumberFromUint(index);
-    return Object::ReadAbsentProperty(isolate, proto, name, language_mode);
+    return Object::ReadAbsentProperty(isolate, proto, name);
   }
 
   LookupIterator it(isolate, receiver, index, Handle<JSReceiver>::cast(proto));
   Handle<Object> result;
-  ASSIGN_RETURN_ON_EXCEPTION(isolate, result,
-                             Object::GetProperty(&it, language_mode), Object);
+  ASSIGN_RETURN_ON_EXCEPTION(isolate, result, Object::GetProperty(&it), Object);
   return result;
 }
 
 
-// TODO(conradw): It would be more efficient to have a separate runtime function
-// for strong mode.
 RUNTIME_FUNCTION(Runtime_LoadFromSuper) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 4);
+  DCHECK_EQ(3, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1);
   CONVERT_ARG_HANDLE_CHECKED(Name, name, 2);
-  CONVERT_LANGUAGE_MODE_ARG_CHECKED(language_mode, 3);
 
   Handle<Object> result;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, result,
-      LoadFromSuper(isolate, receiver, home_object, name, language_mode));
+      isolate, result, LoadFromSuper(isolate, receiver, home_object, name));
   return *result;
 }
 
 
 RUNTIME_FUNCTION(Runtime_LoadKeyedFromSuper) {
   HandleScope scope(isolate);
-  DCHECK(args.length() == 4);
+  DCHECK_EQ(3, args.length());
   CONVERT_ARG_HANDLE_CHECKED(Object, receiver, 0);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, home_object, 1);
   CONVERT_ARG_HANDLE_CHECKED(Object, key, 2);
-  CONVERT_LANGUAGE_MODE_ARG_CHECKED(language_mode, 3);
 
   uint32_t index = 0;
   Handle<Object> result;
 
   if (key->ToArrayIndex(&index)) {
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-        isolate, result, LoadElementFromSuper(isolate, receiver, home_object,
-                                              index, language_mode));
+        isolate, result,
+        LoadElementFromSuper(isolate, receiver, home_object, index));
     return *result;
   }
 
   Handle<Name> name;
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(isolate, name,
                                      Object::ToName(isolate, key));
   // TODO(verwaest): Unify using LookupIterator.
   if (name->AsArrayIndex(&index)) {
     ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-        isolate, result, LoadElementFromSuper(isolate, receiver, home_object,
-                                              index, language_mode));
+        isolate, result,
+        LoadElementFromSuper(isolate, receiver, home_object, index));
     return *result;
   }
   ASSIGN_RETURN_FAILURE_ON_EXCEPTION(
-      isolate, result,
-      LoadFromSuper(isolate, receiver, home_object, name, language_mode));
+      isolate, result, LoadFromSuper(isolate, receiver, home_object, name));
   return *result;
 }
 
 
 static Object* StoreToSuper(Isolate* isolate, Handle<JSObject> home_object,
                             Handle<Object> receiver, Handle<Name> name,
                             Handle<Object> value, LanguageMode language_mode) {
   if (home_object->IsAccessCheckNeeded() &&
       !isolate->MayAccess(handle(isolate->context()), home_object)) {
     isolate->ReportFailedAccessCheck(home_object);
@@ skipping 108 matching lines @@
 
 RUNTIME_FUNCTION(Runtime_GetSuperConstructor) {
   SealHandleScope shs(isolate);
   DCHECK_EQ(1, args.length());
   CONVERT_ARG_CHECKED(JSFunction, active_function, 0);
   return active_function->map()->prototype();
 }
 
 }  // namespace internal
 }  // namespace v8