gcc/testsuite/g++.dg/tree-ssa/pr13146.C

   1 /* { dg-do link } */
   2 /* { dg-options "-O -fstrict-aliasing" } */
   3
   4 class first
   5 {
   6 public:
   7   double d;
   8   int f1;
   9 };
  10
  11 class middle : public first
  12 {
  13 };
  14
  15 class second : public middle
  16 {
  17 public:
  18   int f2;
  19   short a;
  20 };
  21
  22 class third
  23 {
  24 public:
  25   char a;
  26   char b;
  27 };
  28
  29 class multi: public third, public second
  30 {
  31 public:
  32   short s;
  33   char f3;
  34 };
  35
  36 extern void link_error ();
  37
  38 void
  39 foo (first *s1, second *s2)
  40 {
  41   s1->f1 = 0;
  42   s2->f2 = 0;
  43   s1->f1++;
  44   s2->f2++;
  45   s1->f1++;
  46   s2->f2++;
  47   if (s1->f1 != 2)
  48     link_error ();
  49 }
  50
  51 void
  52 bar (first *s1, multi *s3)
  53 {
  54   s1->f1 = 0;
  55   s3->f3 = 0;
  56   s1->f1++;
  57   s3->f3++;
  58   s1->f1++;
  59   s3->f3++;
  60   if (s1->f1 != 2)
  61     link_error ();
  62 }
  63
  64
  65 int
  66 main()
  67 {
  68   first a;
  69   second b;
  70   multi c;
  71   foo (&a, &b);
  72   bar (&a, &c);
  73   return 0;
  74 }