[stubs] Add LoadFixedArrayElements with int index

src/builtins/builtins-array.cc

 // Copyright 2016 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/builtins/builtins.h"
 #include "src/builtins/builtins-utils.h"
 
 #include "src/code-factory.h"
 #include "src/contexts.h"
 #include "src/elements.h"
@@ skipping 215 matching lines @@
         "Disallow pushing onto arrays in dictionary named property mode");
     Node* bit_field3 = assembler.LoadMapBitField3(map);
     assembler.GotoIf(assembler.IsSetWord32<Map::DictionaryMap>(bit_field3),
                      &runtime);
 
     // Check whether the length property is writable. The length property is the
     // only default named property on arrays. It's nonconfigurable, hence is
     // guaranteed to stay the first property.
     Node* descriptors = assembler.LoadMapDescriptors(map);
     Node* details = assembler.LoadFixedArrayElement(
-        descriptors,
-        assembler.Int32Constant(DescriptorArray::ToDetailsIndex(0)));
+        descriptors, DescriptorArray::ToDetailsIndex(0));
     mask = READ_ONLY << PropertyDetails::AttributesField::kShift;
     Node* mask_node = assembler.SmiConstant(mask);
     test = assembler.WordAnd(details, mask_node);
     assembler.GotoIf(assembler.WordEqual(test, mask_node), &runtime);
 
     arg_index.Bind(assembler.IntPtrConstant(0));
     kind = assembler.DecodeWord32<Map::ElementsKindBits>(bit_field2);
 
     assembler.GotoIf(
         assembler.IntPtrGreaterThan(
@@ skipping 2510 matching lines @@
         Runtime::kThrowIncompatibleMethodReceiver, context,
         assembler.HeapConstant(assembler.factory()->NewStringFromAsciiChecked(
             "Array Iterator.prototype.next", TENURED)),
         iterator);
     assembler.Return(result);
   }
 }
 
 }  // namespace internal
 }  // namespace v8