X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=includes%2FRts.h;h=1bfb37a1bf17e57a9e1d961f1ae1c3660672159e;hb=4bba92f93b88e15f0e0f23732d2cfa540acb737b;hp=753a66436b848804d542830dc791394f1dea5326;hpb=9a9803e8dc80ba41bd3e2d31228e64fa6b61060e;p=ghc-hetmet.git

diff --git a/includes/Rts.h b/includes/Rts.h
index 753a664..1bfb37a 100644
--- a/includes/Rts.h
+++ b/includes/Rts.h
@@ -65,6 +65,12 @@ extern "C" {
 #define END_RTS_PRIVATE   /* disabled: END_RTS_PRIVATE */
 #endif
 
+#if __GNUC__ > 4
+#define RTS_UNLIKELY(p) __builtin_expect((p),0)
+#else
+#define RTS_UNLIKELY(p) p
+#endif
+
 /* Fix for mingw stat problem (done here so it's early enough) */
 #ifdef mingw32_HOST_OS
 #define __MSVCRT__ 1