diff --git a/lib/CodeGen/VirtRegMap.cpp b/lib/CodeGen/VirtRegMap.cpp
index 0f5c48a..7b8606c 100644
--- a/lib/CodeGen/VirtRegMap.cpp
+++ b/lib/CodeGen/VirtRegMap.cpp
@@ -937,6 +937,7 @@
             DOUT << "Removing now-noop copy: " << MI;
             MBB.erase(&MI);
             VRM.RemoveFromFoldedVirtMap(&MI);
+            Spills.UpdateLastUse(Src, NULL);
             Spills.disallowClobberPhysReg(VirtReg);
             goto ProcessNextInst;
           }