misched: allow NULL InstrItineraries.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@159599 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index 18e61e0..847bf1e 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/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);
}