[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 36617a992ea035cb9729bd178c6ce1f31b410a00..f0e2dc2e8fb76d63b5a18f76a88032c09414f55c 100644
--- a/src/compiler/mips/instruction-selector-mips.cc
+++ b/src/compiler/mips/instruction-selector-mips.cc
@@ -1471,6 +1471,14 @@ 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);