diff --git a/lib/Target/TargetSchedule.td b/lib/Target/TargetSchedule.td
index 2198c153f7b..89118446a5f 100644
--- a/lib/Target/TargetSchedule.td
+++ b/lib/Target/TargetSchedule.td
@@ -64,3 +64,8 @@ class InstrItinData<InstrItinClass Class, list<InstrStage> stages> {
 class ProcessorItineraries<list<InstrItinData> iid> {
   list<InstrItinData> IID = iid;
 }
+
+// NoItineraries - A marker that can be used by processors without schedule
+// info.
+def NoItineraries : ProcessorItineraries<[]>;
+