diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp
index b35fc2c..9cb580b 100644
--- a/lib/CodeGen/VirtRegMap.cpp
+++ b/lib/CodeGen/VirtRegMap.cpp
@@ -1360,7 +1360,8 @@
         unsigned RReg = SubIdx ? TRI->getSubReg(Phys, SubIdx) : Phys;
         MI.getOperand(i).setReg(RReg);
         if (VRM.isImplicitlyDefined(VirtReg))
-          BuildMI(MBB, &MI, TII->get(TargetInstrInfo::IMPLICIT_DEF), RReg);
+          BuildMI(MBB, &MI, MI.getDebugLoc(),
+                  TII->get(TargetInstrInfo::IMPLICIT_DEF), RReg);
         continue;
       }