mi-sched: DEBUG cleanup, call tracePick for unidirectional scheduling.

llvm-svn: 189993
diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index ed5de5c..6b21323 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -2681,6 +2681,7 @@
         SchedCandidate TopCand(NoPolicy);
         pickNodeFromQueue(Top, DAG->getTopRPTracker(), TopCand);
         assert(TopCand.Reason != NoCand && "failed to find a candidate");
+        tracePick(TopCand, true);
         SU = TopCand.SU;
       }
       IsTopNode = true;
@@ -2692,6 +2693,7 @@
         SchedCandidate BotCand(NoPolicy);
         pickNodeFromQueue(Bot, DAG->getBotRPTracker(), BotCand);
         assert(BotCand.Reason != NoCand && "failed to find a candidate");
+        tracePick(BotCand, false);
         SU = BotCand.SU;
       }
       IsTopNode = false;