Print is const!

llvm-svn: 4737
diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 91ee512..ffd2e6e 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -268,7 +268,7 @@
     OS << ")";
 }
 
-void MachineInstr::print(std::ostream &OS, const TargetMachine &TM) {
+void MachineInstr::print(std::ostream &OS, const TargetMachine &TM) const {
   unsigned StartOp = 0;
 
    // Specialize printing if op#0 is definition