1 files changed, 5 insertions, 0 deletions
diff --git a/include/llvm/CodeGen/MachineInstrBuilder.h b/include/llvm/CodeGen/MachineInstrBuilder.h
index 51900603ac..06f5bf06d9 100644
--- a/include/llvm/CodeGen/MachineInstrBuilder.h
+++ b/include/llvm/CodeGen/MachineInstrBuilder.h
@@ -84,6 +84,11 @@ public:
     return *this;
   }
 
+  const MachineInstrBuilder &addUndef() const {
+    MI->addOperand(MachineOperand::CreateUndef());
+    return *this;
+  }
+
   /// addMemOperand - Add a memory operand to the machine instruction.
   const MachineInstrBuilder &addMemOperand(const MemOperand &MO) const {
     MI->addMemOperand(MO);