gcc/testsuite/g++.dg/pr61289.C

   1 /* { dg-do run } */
   2 /* { dg-options "-O2 -fno-exceptions" } */
   3
   4 struct S
   5 {
   6   inline int fn1 () const { return s; }
   7   __attribute__ ((noinline, noclone)) S *fn2 (int);
   8   __attribute__ ((noinline, noclone)) void fn3 ();
   9   __attribute__ ((noinline, noclone)) static S *fn4 (int);
  10   S (int i) : s (i) {}
  11   int s;
  12 };
  13
  14 int a = 0;
  15 S *b = 0;
  16
  17 S *
  18 S::fn2 (int i)
  19 {
  20   a++;
  21   if (a == 1)
  22     return b;
  23   if (a > 3)
  24     __builtin_abort ();
  25   b = this;
  26   return new S (i + s);
  27 }
  28
  29 S *
  30 S::fn4 (int i)
  31 {
  32   b = new S (i);
  33   return b;
  34 }
  35
  36 void
  37 S::fn3 ()
  38 {
  39   delete this;
  40 }
  41
  42 void
  43 foo ()
  44 {
  45   S *c = S::fn4 (20);
  46   for (int i = 0; i < 2;)
  47     {
  48       S *d = c->fn2 (c->fn1 () + 10);
  49       if (d != c)
  50 {
  51   c->fn3 ();
  52   c = d;
  53   ++i;
  54 }
  55     }
  56   c->fn3 ();
  57 }
  58
  59 int
  60 main ()
  61 {
  62   foo ();
  63 }