[crankshaft] Range analysis should not rely on overflowed ranges.

src/crankshaft/hydrogen-instructions.h

Index: src/crankshaft/hydrogen-instructions.h
diff --git a/src/crankshaft/hydrogen-instructions.h b/src/crankshaft/hydrogen-instructions.h
index 6d1c47bcb86649080229d2a85e6a744ec1a70094..f65a1852b77d7a44e865000ffcc3ff01b48a4786 100644
--- a/src/crankshaft/hydrogen-instructions.h
+++ b/src/crankshaft/hydrogen-instructions.h
@@ -235,6 +235,7 @@ class Range final : public ZoneObject {
     lower_ = Max(lower_, Smi::kMinValue);
     upper_ = Min(upper_, Smi::kMaxValue);
   }
+  void Clear();
   void KeepOrder();
 #ifdef DEBUG
   void Verify() const;