[runtime] Introduce FastNewStrictArgumentsStub to optimize strict arguments.

src/mips/builtins-mips.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_MIPS
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1947 matching lines @@
       __ CallRuntime(Runtime::kCreateListFromArrayLike);
       __ mov(a0, v0);
       __ Pop(a1, a3);
       __ lw(a2, FieldMemOperand(v0, FixedArray::kLengthOffset));
       __ SmiUntag(a2);
     }
     __ Branch(&done_create);
 
     // Try to create the list from an arguments object.
     __ bind(&create_arguments);
-    __ lw(a2,
-          FieldMemOperand(a0, JSObject::kHeaderSize +
-                                  Heap::kArgumentsLengthIndex * kPointerSize));
+    __ lw(a2, FieldMemOperand(a0, JSArgumentsObject::kLengthOffset));
     __ lw(t0, FieldMemOperand(a0, JSObject::kElementsOffset));
     __ lw(at, FieldMemOperand(t0, FixedArray::kLengthOffset));
     __ Branch(&create_runtime, ne, a2, Operand(at));
     __ SmiUntag(a2);
     __ mov(a0, t0);
     __ Branch(&done_create);
 
     // Try to create the list from a JSArray object.
     __ bind(&create_array);
     __ lw(a2, FieldMemOperand(a2, Map::kBitField2Offset));
@@ skipping 777 matching lines @@
   }
 }
 
 
 #undef __
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_MIPS