1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/libgcc2.c b/gcc/libgcc2.c
index 5a82f82f7cd..1a8eedaae06 100644
--- a/gcc/libgcc2.c
+++ b/gcc/libgcc2.c
@@ -523,8 +523,11 @@ __ffsSI2 (UWtype u)
 {
   UWtype count;
 
-  if (u == 0)
-    return 0;
+#ifdef COUNT_TRAILING_ZEROS_0
+  if (COUNT_TRAILING_ZEROS_0 != -1)
+#endif
+    if (u == 0)
+      return 0;
 
   count_trailing_zeros (count, u);
   return count + 1;