Minor change to for-in...

src/arm/codegen-arm.cc

 // Copyright 2010 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 2463 matching lines @@
   __ ldr(r1, frame_->ElementAt(4));
   __ ldr(r1, FieldMemOperand(r1, HeapObject::kMapOffset));
   __ cmp(r1, Operand(r2));
   end_del_check.Branch(eq);
 
   // Convert the entry to a string (or null if it isn't a property anymore).
   __ ldr(r0, frame_->ElementAt(4));  // push enumerable
   frame_->EmitPush(r0);
   frame_->EmitPush(r3);  // push entry
   frame_->InvokeBuiltin(Builtins::FILTER_KEY, CALL_JS, 2);
-  __ mov(r3, Operand(r0));
-
+  __ mov(r3, Operand(r0), SetCC);
   // If the property has been removed while iterating, we just skip it.
-  __ LoadRoot(ip, Heap::kNullValueRootIndex);
-  __ cmp(r3, ip);
   node->continue_target()->Branch(eq);
 
   end_del_check.Bind();
   // Store the entry in the 'each' expression and take another spin in the
   // loop.  r3: i'th entry of the enum cache (or string there of)
   frame_->EmitPush(r3);  // push entry
   { Reference each(this, node->each());
     if (!each.is_illegal()) {
       if (each.size() > 0) {
         __ ldr(r0, frame_->ElementAt(each.size()));
@@ skipping 8937 matching lines @@
   __ bind(&string_add_runtime);
   __ TailCallRuntime(Runtime::kStringAdd, 2, 1);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM