diff --git a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
--- a/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
+++ b/llvm/lib/CodeGen/TwoAddressInstructionPass.cpp
@@ -1656,8 +1656,13 @@
     }
   }
 
-  if (LIS)
-    MF->verify(this, "After two-address instruction pass");
+  // TODO: Remove this ad hoc verification in favor of the usual
+  // -verify-machineinstrs mechanism.
+  if (LIS) {
+    const LLVMTargetMachine &TM = MF->getTarget();
+    if (TM.isMachineVerifierClean())
+      MF->verify(this, "After two-address instruction pass");
+  }
 
   return MadeChange;
 }