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 3a4a36809b72ce3123a59a47ab8164e478906fa3..fab6c917e022e02de3583c53e13b7e41dacbb0d0 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);