[llvm] r324330 - Fix unused variable warning in release mode. NFC.

[Alexander Ivchenko via llvm-commits]

Author: aivchenk
Date: Tue Feb  6 01:53:02 2018
New Revision: 324330

URL: http://llvm.org/viewvc/llvm-project?rev=324330&view=rev
Log:
Fix unused variable warning in release mode. NFC.


Modified:
    llvm/trunk/lib/CodeGen/MachineCombiner.cpp

Modified: llvm/trunk/lib/CodeGen/MachineCombiner.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/CodeGen/MachineCombiner.cpp?rev=324330&r1=324329&r2=324330&view=diff
==============================================================================
--- llvm/trunk/lib/CodeGen/MachineCombiner.cpp (original)
+++ llvm/trunk/lib/CodeGen/MachineCombiner.cpp Tue Feb  6 01:53:02 2018
@@ -448,6 +448,7 @@ void MachineCombiner::verifyPatternOrder
     MachineBasicBlock *MBB, MachineInstr &Root,
     SmallVector<MachineCombinerPattern, 16> &Patterns) {
   long PrevLatencyDiff = std::numeric_limits<long>::max();
+  (void)PrevLatencyDiff; // Variable is used in assert only.
   for (auto P : Patterns) {
     SmallVector<MachineInstr *, 16> InsInstrs;
     SmallVector<MachineInstr *, 16> DelInstrs;