[runtime] Introduce FastNewStrictArgumentsStub to optimize strict arguments.

src/x64/builtins-x64.cc

 // Copyright 2012 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_X64
 
 #include "src/code-factory.h"
 #include "src/codegen.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 2053 matching lines @@
       __ Push(rax);
       __ CallRuntime(Runtime::kCreateListFromArrayLike);
       __ Pop(rdx);
       __ Pop(rdi);
       __ SmiToInteger32(rbx, FieldOperand(rax, FixedArray::kLengthOffset));
     }
     __ jmp(&done_create);
 
     // Try to create the list from an arguments object.
     __ bind(&create_arguments);
-    __ movp(rbx,
-            FieldOperand(rax, JSObject::kHeaderSize +
-                                  Heap::kArgumentsLengthIndex * kPointerSize));
+    __ movp(rbx, FieldOperand(rax, JSArgumentsObject::kLengthOffset));
     __ movp(rcx, FieldOperand(rax, JSObject::kElementsOffset));
     __ cmpp(rbx, FieldOperand(rcx, FixedArray::kLengthOffset));
     __ j(not_equal, &create_runtime);
     __ SmiToInteger32(rbx, rbx);
     __ movp(rax, rcx);
     __ jmp(&done_create);
 
     // Try to create the list from a JSArray object.
     __ bind(&create_array);
     __ movzxbp(rcx, FieldOperand(rcx, Map::kBitField2Offset));
@@ skipping 765 matching lines @@
   __ ret(0);
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_X64