Index: include/llvm/CodeGen/MachineOutliner.h
===================================================================
--- include/llvm/CodeGen/MachineOutliner.h
+++ include/llvm/CodeGen/MachineOutliner.h
@@ -142,6 +142,7 @@
   /// If a target does not need this information, then this should not be
   /// called.
   void initLRU(const TargetRegisterInfo &TRI) {
+    assert(MBB->getParent()->getRegInfo().tracksLiveness());
     LRU.init(TRI);
     LRU.addLiveOuts(*MBB);
 
Index: lib/Target/AArch64/AArch64InstrInfo.cpp
===================================================================
--- lib/Target/AArch64/AArch64InstrInfo.cpp
+++ lib/Target/AArch64/AArch64InstrInfo.cpp
@@ -5065,6 +5065,7 @@
 
   // Check if LR is available through all of the MBB. If it's not, then set
   // a flag.
+  assert(MBB->getParent()->getRegInfo().tracksLiveness());
   LiveRegUnits LRU(getRegisterInfo());
   LRU.addLiveOuts(MBB);