[NFC] fix warning

diff --git a/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp b/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp
index cb0519c..f0c6e83 100644 (file)
--- a/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp
+++ b/llvm/lib/Target/PowerPC/PPCCTRLoops.cpp
@@ -313,6 +313,8 @@ void PPCCTRLoops::expandCTRLoops(MachineLoop *ML, MachineInstr *Start,
 
   MachineBasicBlock *Preheader = Start->getParent();
   MachineBasicBlock *Exiting = Dec->getParent();
+
+  (void)Preheader;
   assert((Preheader && Exiting) &&
          "Preheader and exiting should exist for CTR loop!");