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

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

Index: src/compiler/mips/instruction-selector-mips.cc
diff --git a/src/compiler/mips/instruction-selector-mips.cc b/src/compiler/mips/instruction-selector-mips.cc
index 2f3c791cf791def1f7d96c4bfe9f28c7649aaccc..3fae5a5a1142018aa3fe4e03b0b8ded081d9320d 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -1463,6 +1463,14 @@ void InstructionSelector::VisitFloat64InsertHighWord32(Node* node) {
        g.UseRegister(left), g.UseRegister(right));
 }
 
+void InstructionSelector::VisitFloat64SilenceNaN(Node* node) {
+  MipsOperandGenerator g(this);
+  Node* left = node->InputAt(0);
+  InstructionOperand temps[] = {g.TempRegister()};
+  Emit(kMipsFloat64SilenceNaN, g.DefineSameAsFirst(node), g.UseRegister(left),
+       arraysize(temps), temps);
+}
+
 void InstructionSelector::VisitAtomicLoad(Node* node) {
   LoadRepresentation load_rep = LoadRepresentationOf(node->op());
   MipsOperandGenerator g(this);