diff --git a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
index c839121..53d2da1 100644
--- a/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
+++ b/lib/Target/PowerPC/PPCISelDAGToDAG.cpp
@@ -1069,6 +1069,7 @@
     return CurDAG->SelectNodeTo(N, SelectCCOp, N->getValueType(0), Ops, 4);
   }
   case PPCISD::COND_BRANCH: {
+    // Op #0 is the Chain.
     // Op #1 is the PPC::PRED_* number.
     // Op #2 is the CR#
     // Op #3 is the Dest MBB