Silence unused variable warnings from when assertions are disabled.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157438 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index 662b16f..4c12c0e 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -1174,6 +1174,7 @@
       CandResult TopResult =
         pickNodeFromQueue(Top.Available, DAG->getTopRPTracker(), TopCand);
       assert(TopResult != NoCand && "failed to find the first candidate");
+      (void)TopResult;
       SU = TopCand.SU;
     }
     IsTopNode = true;
@@ -1185,6 +1186,7 @@
       CandResult BotResult =
         pickNodeFromQueue(Bot.Available, DAG->getBotRPTracker(), BotCand);
       assert(BotResult != NoCand && "failed to find the first candidate");
+      (void)BotResult;
       SU = BotCand.SU;
     }
     IsTopNode = false;