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

src/compiler/x64/instruction-selector-x64.cc

Index: src/compiler/x64/instruction-selector-x64.cc
diff --git a/src/compiler/x64/instruction-selector-x64.cc b/src/compiler/x64/instruction-selector-x64.cc
index 1dd3b8441f9643fc6849de23645f023f8913f29e..be56dce0d844c6ea8650bd40832f9bc7592dbaa6 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -2053,6 +2053,12 @@ void InstructionSelector::VisitFloat64InsertHighWord32(Node* node) {
        g.UseRegister(left), g.Use(right));
 }
 
+void InstructionSelector::VisitFloat64SilenceNaN(Node* node) {
+  X64OperandGenerator g(this);
+  Emit(kSSEFloat64SilenceNaN, g.DefineSameAsFirst(node),
+       g.UseRegister(node->InputAt(0)));
+}
+
 void InstructionSelector::VisitAtomicLoad(Node* node) {
   LoadRepresentation load_rep = LoadRepresentationOf(node->op());
   DCHECK(load_rep.representation() == MachineRepresentation::kWord8 ||