[turbofan] Prevent storing signalling NaNs into holey double arrays.

src/compiler/simplified-operator.h

Index: src/compiler/simplified-operator.h
diff --git a/src/compiler/simplified-operator.h b/src/compiler/simplified-operator.h
index 372a05b244640efe2823a26704debb760be4e271..7774a69f20d61018409ae496858f5228f706d08c 100644
--- a/src/compiler/simplified-operator.h
+++ b/src/compiler/simplified-operator.h
@@ -164,6 +164,8 @@ class SimplifiedOperatorBuilder final : public ZoneObject {
   const Operator* NumberToUint32();
   const Operator* NumberIsHoleNaN();
 
+  const Operator* NumberSilenceNaN();
+
   const Operator* SpeculativeNumberAdd(BinaryOperationHints::Hint hint);
   const Operator* SpeculativeNumberSubtract(BinaryOperationHints::Hint hint);