[stubs] Add LoadFixedArrayElements with int index

src/code-stub-assembler.h

 // 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.
 
 #ifndef V8_CODE_STUB_ASSEMBLER_H_
 #define V8_CODE_STUB_ASSEMBLER_H_
 
 #include <functional>
 
 #include "src/compiler/code-assembler.h"
@@ skipping 282 matching lines @@
   // Load value field of a JSValue object.
   Node* LoadJSValueValue(Node* object);
   // Load value field of a WeakCell object.
   Node* LoadWeakCellValueUnchecked(Node* weak_cell);
   Node* LoadWeakCellValue(Node* weak_cell, Label* if_cleared = nullptr);
 
   // Load an array element from a FixedArray.
   Node* LoadFixedArrayElement(
       Node* object, Node* index, int additional_offset = 0,
       ParameterMode parameter_mode = INTEGER_PARAMETERS);
+  Node* LoadFixedArrayElement(Node* object, int index,
+                              int additional_offset = 0) {
+    return LoadFixedArrayElement(object, IntPtrConstant(index),
+                                 additional_offset, INTPTR_PARAMETERS);
+  }
   // Load an array element from a FixedArray, untag it and return it as Word32.
   Node* LoadAndUntagToWord32FixedArrayElement(
       Node* object, Node* index, int additional_offset = 0,
       ParameterMode parameter_mode = INTEGER_PARAMETERS);
   // Load an array element from a FixedDoubleArray.
   Node* LoadFixedDoubleArrayElement(
       Node* object, Node* index, MachineType machine_type,
       int additional_offset = 0,
       ParameterMode parameter_mode = INTEGER_PARAMETERS,
       Label* if_hole = nullptr);
@@ skipping 788 matching lines @@
   }
 #else
 #define CSA_SLOW_ASSERT(csa, x) ((void)0)
 #endif
 
 DEFINE_OPERATORS_FOR_FLAGS(CodeStubAssembler::AllocationFlags);
 
 }  // namespace internal
 }  // namespace v8
 #endif  // V8_CODE_STUB_ASSEMBLER_H_