diff --git a/llvm/lib/CodeGen/LivePhysRegs.cpp b/llvm/lib/CodeGen/LivePhysRegs.cpp
--- a/llvm/lib/CodeGen/LivePhysRegs.cpp
+++ b/llvm/lib/CodeGen/LivePhysRegs.cpp
@@ -88,6 +88,8 @@
       if (!Reg.isPhysical())
         continue;
       if (O->isDef()) {
+        if (O->isDead())
+          removeReg(Reg);
         // Note, dead defs are still recorded.  The caller should decide how to
         // handle them.
         Clobbers.push_back(std::make_pair(Reg, &*O));