Always invoke C++ ArrayPush builtin.

src/arm/stub-cache-arm.cc

 // Copyright 2006-2009 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 898 matching lines @@
         // Check that the maps starting from the prototype haven't changed.
         GenerateLoadGlobalFunctionPrototype(masm(),
                                             Context::BOOLEAN_FUNCTION_INDEX,
                                             r0);
         CheckPrototypes(JSObject::cast(object->GetPrototype()), r0, holder, r3,
                         r1, name, &miss);
       }
       break;
     }
 
-    case JSARRAY_HAS_FAST_ELEMENTS_CHECK:
-      CheckPrototypes(JSObject::cast(object), r1, holder, r3, r0, name, &miss);
-      // Make sure object->HasFastElements().
-      // Get the elements array of the object.
-      __ ldr(r3, FieldMemOperand(r1, JSObject::kElementsOffset));
-      // Check that the object is in fast mode (not dictionary).
-      __ ldr(r0, FieldMemOperand(r3, HeapObject::kMapOffset));
-      __ LoadRoot(ip, Heap::kFixedArrayMapRootIndex);
-      __ cmp(r0, ip);
-      __ b(ne, &miss);
-      break;
-
     default:
       UNREACHABLE();
   }
 
   __ InvokeFunction(function, arguments(), JUMP_FUNCTION);
 
   // Handle call cache miss.
   __ bind(&miss);
   Handle<Code> ic = ComputeCallMiss(arguments().immediate());
   __ Jump(ic, RelocInfo::CODE_TARGET);
@@ skipping 860 matching lines @@
   __ Jump(generic_construct_stub, RelocInfo::CODE_TARGET);
 
   // Return the generated code.
   return GetCode();
 }
 
 
 #undef __
 
 } }  // namespace v8::internal