1 files changed, 29 insertions, 0 deletions
diff --git a/gcc/c-objc-common.c b/gcc/c-objc-common.c
index 5a57aa4..73a3241 100644
--- a/gcc/c-objc-common.c
+++ b/gcc/c-objc-common.c
@@ -332,3 +332,32 @@ c_tree_printer (pretty_printer *pp, text_info *text)
   pp_string (pp, n);
   return true;
 }
+
+tree
+c_objc_common_truthvalue_conversion (tree expr)
+{
+ retry:
+  switch (TREE_CODE (TREE_TYPE (expr)))
+    {
+    case ARRAY_TYPE:
+      expr = default_conversion (expr);
+      if (TREE_CODE (TREE_TYPE (expr)) != ARRAY_TYPE)
+	goto retry;
+
+      error ("used array that cannot be converted to pointer where scalar is required");
+      return error_mark_node;
+
+    case RECORD_TYPE:
+      error ("used struct type value where scalar is required");
+      return error_mark_node;
+
+    case UNION_TYPE:
+      error ("used union type value where scalar is required");
+      return error_mark_node;
+    default:
+      break;
+    }
+
+  return c_common_truthvalue_conversion (expr);
+}
+