Annotate an unlikely condition

[stockfish] / src / position.cpp

diff --git a/src/position.cpp b/src/position.cpp
index f7a89e07f3d88afacdf7f6ae18b80a706834d77e..60d619bed4e0636a34b27cb93321dd446a9d6bfc 100644 (file)
--- a/src/position.cpp
+++ b/src/position.cpp
@@ -652,7 +652,7 @@ bool Position::move_gives_check(Move m, const CheckInfo& ci) const {
       return true;
 
   // Discovery check ?
-  if (ci.dcCandidates && (ci.dcCandidates & from))
+  if (unlikely(ci.dcCandidates) && (ci.dcCandidates & from))
   {
       // For pawn and king moves we need to verify also direction
       if (   (pt != PAWN && pt != KING)