1 files changed, 8 insertions, 1 deletions
diff --git a/gcc/expr.c b/gcc/expr.c
index c644933c0ba..e239f4c69b5 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -8962,7 +8962,14 @@ reduce_to_bit_field_precision (rtx exp, rtx target, tree type)
   HOST_WIDE_INT prec = TYPE_PRECISION (type);
   if (target && GET_MODE (target) != GET_MODE (exp))
     target = 0;
-  if (TYPE_UNSIGNED (type))
+  /* For constant values, reduce using build_int_cst_type. */
+  if (GET_CODE (exp) == CONST_INT)
+    {
+      HOST_WIDE_INT value = INTVAL (exp);
+      tree t = build_int_cst_type (type, value);
+      return expand_expr (t, target, VOIDmode, EXPAND_NORMAL);
+    }
+  else if (TYPE_UNSIGNED (type))
     {
       rtx mask;
       if (prec < HOST_BITS_PER_WIDE_INT)