1 files changed, 10 insertions, 0 deletions
diff --git a/gcc/c/c-fold.c b/gcc/c/c-fold.c
index 12460bc..480e34c 100644
--- a/gcc/c/c-fold.c
+++ b/gcc/c/c-fold.c
@@ -676,3 +676,13 @@ c_fully_fold_internal (tree expr, bool in_init, bool *maybe_const_operands,
     }
   return ret;
 }
+
+/* Fold X for consideration by one of the warning functions when checking
+   whether an expression has a constant value.  */
+
+tree
+fold_for_warn (tree x)
+{
+  /* The C front-end has already folded X appropriately.  */
+  return x;
+}