gcc/testsuite/gcc.c-torture/execute/pr41463.c

   1 #include <stdlib.h>
   2
   3 union tree_node;
   4
   5 struct tree_common
   6 {
   7   int a;
   8   long b;
   9   long c;
  10   void *p;
  11   int d;
  12 };
  13
  14 struct other_tree
  15 {
  16   struct tree_common common;
  17   int arr[14];
  18 };
  19
  20 struct tree_vec
  21 {
  22   struct tree_common common;
  23   int length;
  24   union tree_node *a[1];
  25 };
  26
  27 union tree_node
  28 {
  29   struct other_tree othr;
  30   struct tree_vec vec;
  31 };
  32
  33 union tree_node global;
  34
  35 union tree_node * __attribute__((noinline))
  36 foo (union tree_node *p, int i)
  37 {
  38   union tree_node **q;
  39   p->vec.a[i] = (union tree_node *) 0;
  40   q = &p->vec.a[1];
  41   *q = &global;
  42   return p->vec.a[i];
  43 }
  44
  45 extern void abort (void);
  46 extern void *malloc (__SIZE_TYPE__);
  47
  48 int
  49 main()
  50 {
  51   union tree_node *p = malloc (sizeof (union tree_node));
  52   if (foo (p, 1) != &global)
  53     abort ();
  54   return 0;
  55 }
  56