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

src/compiler/simplified-lowering.cc

Index: src/compiler/simplified-lowering.cc
diff --git a/src/compiler/simplified-lowering.cc b/src/compiler/simplified-lowering.cc
index 45babfbd2d7e61d86ab2624362ea2c2d3456aada..f7f004650adc03cc0e5bc07f7ef2066c84f6548c 100644
--- a/src/compiler/simplified-lowering.cc
+++ b/src/compiler/simplified-lowering.cc
@@ -1796,6 +1796,9 @@ class RepresentationSelector {
       case IrOpcode::kFloat64RoundUp:
         return VisitUnop(node, UseInfo::TruncatingFloat64(),
                          MachineRepresentation::kFloat64);
+      case IrOpcode::kFloat64SilenceNaN:
+        return VisitUnop(node, UseInfo::TruncatingFloat64(),
+                         MachineRepresentation::kFloat64);
       case IrOpcode::kFloat64Equal:
       case IrOpcode::kFloat64LessThan:
       case IrOpcode::kFloat64LessThanOrEqual:
@@ -1809,6 +1812,11 @@ class RepresentationSelector {
         return VisitBinop(node, UseInfo::TruncatingFloat64(),
                           UseInfo::TruncatingWord32(),
                           MachineRepresentation::kFloat64);
+      case IrOpcode::kNumberSilenceNaN:
+        VisitUnop(node, UseInfo::TruncatingFloat64(),
+                  MachineRepresentation::kFloat64);
+        if (lower()) NodeProperties::ChangeOp(node, Float64Op(node));
+        return;
       case IrOpcode::kLoadStackPointer:
       case IrOpcode::kLoadFramePointer:
       case IrOpcode::kLoadParentFramePointer: