diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index 18e61e0..847bf1e 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -408,6 +408,7 @@
 
   /// getNumMicroOps - Return the number of issue slots required for this MI.
   unsigned getNumMicroOps(MachineInstr *MI) const {
+    if (!InstrItins) return 1;
     int UOps = InstrItins->getNumMicroOps(MI->getDesc().getSchedClass());
     return (UOps >= 0) ? UOps : TII->getNumMicroOps(InstrItins, MI);
   }