Silence unused variable warning

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@135339 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/SplitKit.cpp b/lib/CodeGen/SplitKit.cpp
index b0806a5..761cab7 100644
--- a/lib/CodeGen/SplitKit.cpp
+++ b/lib/CodeGen/SplitKit.cpp
@@ -1292,6 +1292,7 @@
   // means we need to create a local interval that can be allocated a
   // different register.
   unsigned LocalIntv = openIntv();
+  (void)LocalIntv;
   DEBUG(dbgs() << ", creating local interval " << LocalIntv << ".\n");
 
   if (!BI.LiveOut || BI.LastUse < LSP) {