1 files changed, 1 insertions, 1 deletions
diff --git a/tcg/optimize.c b/tcg/optimize.c
index 752cc5c56b..275db77b42 100644
--- a/tcg/optimize.c
+++ b/tcg/optimize.c
@@ -2376,7 +2376,7 @@ static bool fold_shift(OptContext *ctx, TCGOp *op)
          * will not reduced the number of input sign repetitions.
          */
         sign = (s_mask & -s_mask) >> 1;
-        if (!(z_mask & sign)) {
+        if (sign && !(z_mask & sign)) {
             ctx->s_mask = s_mask;
         }
         break;