[crankshaft] Fix invalid number truncation assumption on HAdd inputs.

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 514882145f25caffde2ab63445e74542c8c66e6a..b10e3ab819c6fed211ddf983c4415285ebe9872b 100644
--- a/src/crankshaft/hydrogen-instructions.h
+++ b/src/crankshaft/hydrogen-instructions.h
@@ -4370,6 +4370,11 @@ class HAdd final : public HArithmeticBinaryOperation {
       SetChangesFlag(kNewSpacePromotion);
       ClearFlag(kAllowUndefinedAsNaN);
     }
+    if (!right()->type().IsTaggedNumber() &&
+        !right()->representation().IsDouble() &&
+        !right()->representation().IsSmiOrInteger32()) {
+      ClearFlag(kAllowUndefinedAsNaN);
+    }
   }
 
   Representation RepresentationFromInputs() override;