PPC: [runtime] Introduce FastNewStrictArgumentsStub to optimize strict arguments.

src/ppc/builtins-ppc.cc

 // Copyright 2014 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_PPC
 
 #include "src/codegen.h"
 #include "src/debug/debug.h"
 #include "src/deoptimizer.h"
 #include "src/full-codegen/full-codegen.h"
@@ skipping 1973 matching lines @@
       __ Push(r4, r6, r3);
       __ CallRuntime(Runtime::kCreateListFromArrayLike);
       __ Pop(r4, r6);
       __ LoadP(r5, FieldMemOperand(r3, FixedArray::kLengthOffset));
       __ SmiUntag(r5);
     }
     __ b(&done_create);
 
     // Try to create the list from an arguments object.
     __ bind(&create_arguments);
-    __ LoadP(r5, FieldMemOperand(
-                     r3, JSObject::kHeaderSize +
-                             Heap::kArgumentsLengthIndex * kPointerSize));
+    __ LoadP(r5, FieldMemOperand(r3, JSArgumentsObject::kLengthOffset));
     __ LoadP(r7, FieldMemOperand(r3, JSObject::kElementsOffset));
     __ LoadP(ip, FieldMemOperand(r7, FixedArray::kLengthOffset));
     __ cmp(r5, ip);
     __ bne(&create_runtime);
     __ SmiUntag(r5);
     __ mr(r3, r7);
     __ b(&done_create);
 
     // Try to create the list from a JSArray object.
     __ bind(&create_array);
@@ skipping 748 matching lines @@
     __ bkpt(0);
   }
 }
 
 
 #undef __
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_TARGET_ARCH_PPC