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

src/compiler/ia32/instruction-selector-ia32.cc

Index: src/compiler/ia32/instruction-selector-ia32.cc
diff --git a/src/compiler/ia32/instruction-selector-ia32.cc b/src/compiler/ia32/instruction-selector-ia32.cc
index f052d8fdd8955da766334099a376e95625357fae..3ffdd30040ac1aaf77f0a79ddbb6cec161d1c5d9 100644
--- a/src/compiler/ia32/instruction-selector-ia32.cc
+++ b/src/compiler/ia32/instruction-selector-ia32.cc
@@ -1600,6 +1600,12 @@ void InstructionSelector::VisitFloat64InsertHighWord32(Node* node) {
        g.UseRegister(left), g.Use(right));
 }
 
+void InstructionSelector::VisitFloat64SilenceNaN(Node* node) {
+  IA32OperandGenerator 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 ||