gcc/testsuite/gcc.dg/pr18241-3.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O1" } */
   3
   4 void abort (void);
   5
   6 void radix_tree_tag_clear (int *node)
   7 {
   8         int *path[2], **pathp = path, height;
   9         volatile int *addr;
  10
  11         height = 1;
  12         pathp[0] = node;
  13
  14         while (height > 0) {
  15                 pathp[1] = pathp[0];
  16                 pathp++;
  17                 height--;
  18         }
  19
  20         addr = pathp[0];
  21         *addr = 1;
  22 }
  23
  24 int main ()
  25 {
  26         int n;
  27         radix_tree_tag_clear (&n);
  28         if (n != 1)
  29                 abort ();
  30         return 0;
  31 }