Extend ToBooleanStub to be able to return oddballs.

src/code-stubs-hydrogen.cc

Index: src/code-stubs-hydrogen.cc
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index c8dd9bf0f198af82064d9487852e24ba8733d596..775916adc52b7c28250c2c2eae085b134d6dc3a3 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -1065,14 +1065,31 @@ Handle<Code> StringAddStub::GenerateCode() {
 template <>
 HValue* CodeStubGraphBuilder<ToBooleanStub>::BuildCodeInitializedStub() {
   ToBooleanStub* stub = casted_stub();
+  HValue* true_value = NULL;
+  HValue* false_value = NULL;
+
+  switch (stub->GetMode()) {
+    case ToBooleanStub::RESULT_AS_SMI:
+      true_value = graph()->GetConstant1();
+      false_value = graph()->GetConstant0();
+      break;
+    case ToBooleanStub::RESULT_AS_ODDBALL:
+      true_value = graph()->GetConstantTrue();
+      false_value = graph()->GetConstantFalse();
+      break;
+    case ToBooleanStub::RESULT_AS_INVERSE_ODDBALL:
+      true_value = graph()->GetConstantFalse();
+      false_value = graph()->GetConstantTrue();
+      break;
+  }
 
   IfBuilder if_true(this);
   if_true.If<HBranch>(GetParameter(0), stub->GetTypes());
   if_true.Then();
-  if_true.Return(graph()->GetConstant1());
+  if_true.Return(true_value);
   if_true.Else();
   if_true.End();
-  return graph()->GetConstant0();
+  return false_value;
 }