Fixed Clang warning -Wshift-sign-overflow.

diff --git a/lib/bench.cc b/lib/bench.cc
index bfea2cbed7f5347f29564fa8ef041f53308ce25b..ef51b094b1dbf8bf04fa3f92cfff6f21faeb35fb 100644 (file)
--- a/lib/bench.cc
+++ b/lib/bench.cc
@@ -27,7 +27,7 @@ struct Result
 };
 
 static const uint64_t UNAVAIL = 0xFFFFffffFFFFffff;
-static const int XREG_RE2 = 1 << 31;
+static const int XREG_RE2 = 1 << 30;
 
 static inline void show(const std::vector<Result> &results)
 {