gcc/testsuite/gcc.c-torture/execute/pr49419.c

   1 /* PR tree-optimization/49419 */
   2
   3 extern void abort (void);
   4
   5 struct S { int w, x, y; } *t;
   6
   7 int
   8 foo (int n, int f, int *s, int m)
   9 {
  10   int x, i, a;
  11   if (n == -1)
  12     return 0;
  13   for (x = n, i = 0; t[x].w == f && i < m; i++)
  14     x = t[x].x;
  15   if (i == m)
  16     abort ();
  17   a = i + 1;
  18   for (x = n; i > 0; i--)
  19     {
  20       s[i] = t[x].y;
  21       x = t[x].x;
  22     }
  23   s[0] = x;
  24   return a;
  25 }
  26
  27 int
  28 main (void)
  29 {
  30   int s[3], i;
  31   struct S buf[3] = { { 1, 1, 2 }, { 0, 0, 0 }, { 0, 0, 0 } };
  32   t = buf;
  33   if (foo (0, 1, s, 3) != 2)
  34     abort ();
  35   if (s[0] != 1 || s[1] != 2)
  36     abort ();
  37   return 0;
  38 }