gcc/testsuite/gcc.dg/pr50763-2.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2" } */
   3
   4 typedef union tree_node *tree;
   5
   6 struct tree_base
   7 {
   8   int code;
   9 };
  10
  11 struct tree_typed
  12 {
  13   struct tree_base base;
  14   tree type;
  15 };
  16
  17 struct tree_common
  18 {
  19   struct tree_typed typed;
  20 };
  21
  22 struct tree_type_common
  23 {
  24   tree main_variant;
  25 };
  26
  27 union tree_node
  28 {
  29   struct tree_base base;
  30   struct tree_typed typed;
  31   struct tree_type_common type_common;
  32 };
  33
  34 int std_canonical_va_list_type (tree type)
  35 {
  36   if (type->base.code)
  37     type = type->typed.type;
  38   else
  39     if (type->typed.type->base.code)
  40       type = type->typed.type;
  41
  42   if (type->type_common.main_variant)
  43     return 1;
  44
  45   return 0;
  46 }