gcc/testsuite/g++.dg/tree-ssa/pr17400.C

   1 // Test PR 17400.  Test case provided by Serge Belyshev.
   2
   3 /* { dg-do compile } */
   4 /* { dg-options "-O1" } */
   5
   6
   7 void inc (int &);
   8 bool dec_test (int &);
   9
  10 struct A
  11 {
  12   int c;
  13
  14   friend void AddRef (A * p)
  15   {
  16     inc (p->c);
  17   }
  18
  19   friend void Release (A * p)
  20   {
  21     if(dec_test (p->c))
  22       delete p;
  23   }
  24 };
  25
  26 struct B
  27 {
  28   B (A *p) : obj(p)
  29   {
  30     AddRef (obj);
  31   }
  32
  33   ~B()
  34   {
  35     Release (obj);
  36   }
  37
  38   void swap (B &rhs)
  39   {
  40     A * tmp = obj;
  41     obj = rhs.obj;
  42     rhs.obj = tmp;
  43   }
  44
  45   A *obj;
  46 };
  47
  48 void bar (A *p1, A* p2)
  49 {
  50     B px (p1);
  51     B px2 (p2);
  52     px.swap (px2);
  53 }