[DivRemPairs] Fixup DNDEBUG build - variable is only used in assertion

llvm-svn: 367423
diff --git a/llvm/lib/Transforms/Scalar/DivRemPairs.cpp b/llvm/lib/Transforms/Scalar/DivRemPairs.cpp
index 5dd65d0..4f53874 100644
--- a/llvm/lib/Transforms/Scalar/DivRemPairs.cpp
+++ b/llvm/lib/Transforms/Scalar/DivRemPairs.cpp
@@ -195,6 +195,7 @@
     auto &RemInst = E.RemInst;
 
     const bool RemOriginallyWasInExpandedForm = E.isRemExpanded();
+    (void)RemOriginallyWasInExpandedForm; // suppress unused variable warning
 
     if (HasDivRemOp && E.isRemExpanded()) {
       // The target supports div+rem but the rem is expanded.