1 files changed, 2 insertions, 1 deletions
diff --git a/gcc/expr.c b/gcc/expr.c
index e994f93..caac0662 100644
--- a/gcc/expr.c
+++ b/gcc/expr.c
@@ -2261,7 +2261,8 @@ can_store_by_pieces (unsigned HOST_WIDE_INT len,
   enum machine_mode mode, tmode;
   enum insn_code icode;
   int reverse;
-  rtx cst;
+  /* cst is set but not used if LEGITIMATE_CONSTANT doesn't use it.  */
+  rtx cst ATTRIBUTE_UNUSED;
 
   if (len == 0)
     return 1;