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

src/compiler/instruction-selector.h

Index: src/compiler/instruction-selector.h
diff --git a/src/compiler/instruction-selector.h b/src/compiler/instruction-selector.h
index b1bcb0fa593bb57eb7dbbc23400695a3f922c09c..0a3aea9ad9fcdc3131f919380887d2c435dc7e15 100644
--- a/src/compiler/instruction-selector.h
+++ b/src/compiler/instruction-selector.h
@@ -272,6 +272,9 @@ class InstructionSelector final {
   void EmitPrepareArguments(ZoneVector<compiler::PushParameter>* arguments,
                             const CallDescriptor* descriptor, Node* node);
 
+  void EmitIdentity(Node* node);
+  bool CanProduceSignallingNaN(Node* node);

[Benedikt Meurer, 2016/06/13 17:26:30]

Nit: signaling

+
   // ===========================================================================
 
   Schedule* schedule() const { return schedule_; }