From 59737f22fccb9c2ab8744a719f4dbb95eedf7943 Mon Sep 17 00:00:00 2001
From: Kenneth Heafield <github@kheafield.com>
Date: Fri, 14 Dec 2012 12:48:26 -0800
Subject: Updated kenlm

---
 klm/util/exception.hh | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

(limited to 'klm/util/exception.hh')

diff --git a/klm/util/exception.hh b/klm/util/exception.hh
index 053a850b..0165a7a3 100644
--- a/klm/util/exception.hh
+++ b/klm/util/exception.hh
@@ -87,8 +87,14 @@ template <class Except, class Data> typename Except::template ExceptionTag<Excep
   throw UTIL_e; \
 } while (0)
 
+#if __GNUC__ >= 3
+#define UTIL_UNLIKELY(x) __builtin_expect (!!(x), 0)
+#else
+#define UTIL_UNLIKELY(x) (x)
+#endif
+
 #define UTIL_THROW_IF(Condition, Exception, Modify) do { \
-  if (Condition) { \
+  if (UTIL_UNLIKELY(Condition)) { \
     Exception UTIL_e; \
     UTIL_SET_LOCATION(UTIL_e, #Exception, #Condition); \
     UTIL_e << Modify; \
-- 
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