Tweak VNInfo printing.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@115650 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/LiveInterval.cpp b/lib/CodeGen/LiveInterval.cpp
index 0ea8f59..fad11fa 100644
--- a/lib/CodeGen/LiveInterval.cpp
+++ b/lib/CodeGen/LiveInterval.cpp
@@ -683,6 +683,8 @@
         OS << "x";
       } else {
         OS << vni->def;
+        if (vni->isPHIDef())
+          OS << "-phidef";
         if (vni->hasPHIKill())
           OS << "-phikill";
         if (vni->hasRedefByEC())