Fix a build failure on Vladimir's tester.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@27785 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/utils/PerfectShuffle/PerfectShuffle.cpp b/utils/PerfectShuffle/PerfectShuffle.cpp
index b19dd0d..386b05d 100644
--- a/utils/PerfectShuffle/PerfectShuffle.cpp
+++ b/utils/PerfectShuffle/PerfectShuffle.cpp
@@ -16,6 +16,7 @@
 
 #include <iostream>
 #include <vector>
+#include <cassert>
 
 struct Operator;