diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp
index 0ea8f5978c9..fad11fa0806 100644
--- a/lib/CodeGen/LiveInterval.cpp
+++ b/lib/CodeGen/LiveInterval.cpp
@@ -683,6 +683,8 @@ void LiveInterval::print(raw_ostream &OS, const TargetRegisterInfo *TRI) const {
         OS << "x";
       } else {
         OS << vni->def;
+        if (vni->isPHIDef())
+          OS << "-phidef";
         if (vni->hasPHIKill())
           OS << "-phikill";
         if (vni->hasRedefByEC())