diff --git a/include/llvm/CodeGen/MachineInstr.h b/include/llvm/CodeGen/MachineInstr.h
index 95a7f07a450..5f0f1b91bcf 100644
--- a/include/llvm/CodeGen/MachineInstr.h
+++ b/include/llvm/CodeGen/MachineInstr.h
@@ -229,10 +229,6 @@ public:
     return (opType == MO_VirtualRegister || opType == MO_MachineRegister) 
       && regNum >= MRegisterInfo::FirstVirtualRegister;
   }
-  bool isPhysicalRegister() const {
-    return (opType == MO_VirtualRegister || opType == MO_MachineRegister) 
-      && (unsigned)regNum < MRegisterInfo::FirstVirtualRegister;
-  }
   bool isRegister() const {
     return opType == MO_VirtualRegister || opType == MO_MachineRegister;
   }