Micro optimize generate_piece_checks()

[stockfish] / src / movegen.cpp

diff --git a/src/movegen.cpp b/src/movegen.cpp
index 0f2f6b4e0fd37d94187eeb05cfde1d6179e1b412..d2b55bd28053f262c2513bdfd17c19a0b307041d 100644 (file)
--- a/src/movegen.cpp
+++ b/src/movegen.cpp
@@ -815,6 +815,9 @@ namespace {
         return mlist;
 
     Bitboard checkSqs = pos.piece_attacks<Piece>(ksq) & pos.empty_squares();
+    if (!checkSqs)
+        return mlist;
+
     while (b)
     {
         Square from = pop_1st_bit(&b);