Do not explicitly record undetectable objects in the ToBoolean stub.

src/code-stubs.cc

 // Copyright 2011 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 324 matching lines @@
   types_.Print(stream);
 }
 
 
 void ToBooleanStub::Types::Print(StringStream* stream) {
   if (IsEmpty()) stream->Add("None");
   if (Contains(UNDEFINED)) stream->Add("Undefined");
   if (Contains(BOOLEAN)) stream->Add("Bool");
   if (Contains(SMI)) stream->Add("Smi");
   if (Contains(NULL_TYPE)) stream->Add("Null");
-  if (Contains(UNDETECTABLE)) stream->Add("Undetectable");
   if (Contains(SPEC_OBJECT)) stream->Add("SpecObject");
   if (Contains(STRING)) stream->Add("String");
   if (Contains(HEAP_NUMBER)) stream->Add("HeapNumber");
   if (Contains(INTERNAL_OBJECT)) stream->Add("InternalObject");
 }
 
 
 void ToBooleanStub::Types::TraceTransition(Types to) {
   if (!FLAG_trace_ic) return;
   char buffer[100];
@@ skipping 15 matching lines @@
     return false;
   } else if (object->IsBoolean()) {
     Add(BOOLEAN);
     return object->IsTrue();
   } else if (object->IsNull()) {
     Add(NULL_TYPE);
     return false;
   } else if (object->IsSmi()) {
     Add(SMI);
     return Smi::cast(*object)->value() != 0;
-  } else if (object->IsUndetectableObject()) {
-    Add(UNDETECTABLE);
-    return false;
   } else if (object->IsSpecObject()) {
     Add(SPEC_OBJECT);
-    return true;
+    return !object->IsUndetectableObject();
   } else if (object->IsString()) {
     Add(STRING);
-    return String::cast(*object)->length() != 0;
+    return !object->IsUndetectableObject() &&
+        String::cast(*object)->length() != 0;
   } else if (object->IsHeapNumber()) {
     Add(HEAP_NUMBER);
     double value = HeapNumber::cast(*object)->value();
-    return value != 0 && !isnan(value);
+    return !object->IsUndetectableObject() && value != 0 && !isnan(value);
   } else {
     Add(INTERNAL_OBJECT);
-    return true;
+    return !object->IsUndetectableObject();
   }
 }
 
 
 } }  // namespace v8::internal