Add boolean flag to HChange and LNumberUntagD to not convert undefined to NaN.

src/hydrogen-instructions.cc

Index: src/hydrogen-instructions.cc
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index cc2dcf5c788560cb0f82788cdabd7d76573a8119..110d8e4c9356b778bfb660dc0bd411fe65d42e87 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -1240,6 +1240,10 @@ void HCompare::SetInputRepresentation(Representation r) {
   if (r.IsTagged()) {
     SetAllSideEffects();
     ClearFlag(kUseGVN);
+  } else if (r.IsDouble()) {
+    SetFlag(kDeoptimizeOnUndefined);
+    ClearAllSideEffects();
+    SetFlag(kUseGVN);
   } else {
     ClearAllSideEffects();
     SetFlag(kUseGVN);