ld/testsuite/ld-plugin/pr13066.cc

   1 #include <stdio.h>
   2
   3 template <typename V> struct S
   4 {
   5   V *f, *l;
   6   __attribute__ ((noinline)) S (void) { f = 0, l = 0; }
   7   void foo (V *x)
   8   {
   9     if (x->p != 0)
  10       x->p->n = x->n;
  11     else
  12       f = x->n;
  13     if (x->n != 0)
  14       x->n->p = x->p;
  15     else
  16       l = x->p;
  17   }
  18   __attribute__ ((noinline)) void bar (V *x)
  19   {
  20     x->n = 0;
  21     x->p = l;
  22     if (l != 0)
  23       l->n = x;
  24     else
  25       f = x;
  26     l = x;
  27   }
  28 };
  29
  30 struct H;
  31
  32 struct A
  33 {
  34   S <H> k;
  35 };
  36
  37 struct H
  38 {
  39   A *a;
  40   H *p, *n;
  41   __attribute__ ((noinline)) H (void) { p = 0, n = 0, a = 0; }
  42   __attribute__ ((noinline)) H (A *b) : a (b)
  43   {
  44     p = 0;
  45     n = 0;
  46     if (a != 0)
  47       a->k.bar (this);
  48   }
  49   __attribute__ ((noinline)) H (const H &h) : a (h.a)
  50   {
  51     p = 0;
  52     n = 0;
  53     if (a != 0)
  54       a->k.bar (this);
  55   }
  56   ~H (void) { if (a != 0) a->k.foo (this); }
  57   H &operator= (const H &o)
  58   {
  59     if (a != 0 || &o == this)
  60       __builtin_abort ();
  61     a = o.a;
  62     if (a != 0)
  63       a->k.bar (this);
  64     return *this;
  65   }
  66 };
  67
  68 __attribute__ ((noinline))
  69 H baz (void)
  70 {
  71   return H (new A);
  72 }
  73
  74 H g;
  75
  76 int
  77 main (void)
  78 {
  79   g = baz ();
  80   if (g.a->k.f != &g)
  81     __builtin_abort ();
  82   printf ("OK\n");
  83   return 0;
  84 }
  85