[runtime] Introduce FastNewStrictArgumentsStub to optimize strict arguments.

src/arm64/builtins-arm64.cc

 // Copyright 2013 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.
 
 #if V8_TARGET_ARCH_ARM64
 
 #include "src/arm64/frames-arm64.h"
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
@@ skipping 1956 matching lines @@
       __ Push(target, new_target, arguments_list);
       __ CallRuntime(Runtime::kCreateListFromArrayLike);
       __ Pop(new_target, target);
       __ Ldrsw(len, UntagSmiFieldMemOperand(arguments_list,
                                             FixedArray::kLengthOffset));
     }
     __ B(&done_create);
 
     // Try to create the list from an arguments object.
     __ Bind(&create_arguments);
-    __ Ldrsw(len, UntagSmiFieldMemOperand(
-                      arguments_list,
-                      JSObject::kHeaderSize +
-                          Heap::kArgumentsLengthIndex * kPointerSize));
+    __ Ldrsw(len, UntagSmiFieldMemOperand(arguments_list,
+                                          JSArgumentsObject::kLengthOffset));
     __ Ldr(x10, FieldMemOperand(arguments_list, JSObject::kElementsOffset));
     __ Ldrsw(x11, UntagSmiFieldMemOperand(x10, FixedArray::kLengthOffset));
     __ CompareAndBranch(len, x11, ne, &create_runtime);
     __ Mov(args, x10);
     __ B(&done_create);
 
     // Try to create the list from a JSArray object.
     __ Bind(&create_array);
     __ Ldr(x10, FieldMemOperand(arguments_list_map, Map::kBitField2Offset));
     __ DecodeField<Map::ElementsKindBits>(x10);
@@ skipping 825 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_ARM