Index: llvm/lib/CodeGen/MachineVerifier.cpp
===================================================================
--- llvm/lib/CodeGen/MachineVerifier.cpp
+++ llvm/lib/CodeGen/MachineVerifier.cpp
@@ -2737,6 +2737,17 @@
       hasDef = true;
       if (MOI->isEarlyClobber())
         isEarlyClobber = true;
+
+      if (MOI->isTied() && Register::isVirtualRegister(Reg)) {
+        unsigned DefOpNum = std::distance(MI->operands_begin(), &*MOI);
+        unsigned UseOpNum = MI->findTiedOperandIdx(DefOpNum);
+        if (!MI->getOperand(UseOpNum).isUndef() &&
+            !LR.liveAt(VNI->def.getBaseIndex())) {
+          report("tied def w/o use in same live range", MI);
+          report_context(LR, Reg, LaneMask);
+          report_context(*VNI);
+        }
+      }
     }
 
     if (!hasDef) {