gcc/testsuite/gcc.dg/torture/pr61757.c

   1 /* { dg-do run } */
   2
   3 extern void abort (void);
   4
   5 struct X { void *p; int res; } a[32];
   6
   7 int foo (unsigned i, unsigned n, void *q)
   8 {
   9   if (i + 1 < n && q == a[i + 1].p)
  10     {
  11       do {
  12           ++i;
  13       } while (i < n && q == a[i].p);
  14       --i;
  15       return a[i].res;
  16     }
  17   else
  18     return a[i].res;
  19 }
  20
  21 int main ()
  22 {
  23   int x;
  24   a[0].p = &x;
  25   a[0].res = -1;
  26   a[1].p = &x;
  27   a[1].res = 1;
  28   a[2].p = (void *)0;
  29   a[2].res = 0;
  30   if (foo (0, 3, &x) != 1)
  31     abort ();
  32   return 0;
  33 }