HasNonSmiUse should ignore tagged uses

src/hydrogen-instructions.cc

 // Copyright 2012 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 4357 matching lines @@
   }
   return rep;
 }
 
 
 bool HValue::HasNonSmiUse() {
   for (HUseIterator it(uses()); !it.Done(); it.Advance()) {
     // We check for observed_input_representation elsewhere.
     Representation use_rep =
         it.value()->RequiredInputRepresentation(it.index());
-    if (!use_rep.IsNone() && !use_rep.IsSmi()) return true;
+    if (!use_rep.IsNone() &&
+        !use_rep.IsSmi() &&
+        !use_rep.IsTagged()) {
+      return true;
+    }
   }
   return false;
 }
 
 
 // Node-specific verification code is only included in debug mode.
 #ifdef DEBUG
 
 void HPhi::Verify() {
   ASSERT(OperandCount() == block()->predecessors()->length());
@@ skipping 177 matching lines @@
       break;
     case kExternalMemory:
       stream->Add("[external-memory]");
       break;
   }
 
   stream->Add("@%d", offset());
 }
 
 } }  // namespace v8::internal