gcc/testsuite/gcc.dg/torture/pr67916.c

   1 /* PR tree-optimization/67916 */
   2 /* { dg-do run } */
   3
   4 int a[6], b = 1, d, e;
   5 long long c;
   6 static int f = 1;
   7
   8 void
   9 fn1 (int p1)
  10 {
  11   b = (b >> 1) & (1 ^ a[(1 ^ p1) & 5]);
  12 }
  13
  14 void
  15 fn2 ()
  16 {
  17   b = (b >> 1) & (1 ^ a[(b ^ 1) & 1]);
  18   fn1 (c >> 1 & 5);
  19   fn1 (c >> 2 & 5);
  20   fn1 (c >> 4 & 5);
  21   fn1 (c >> 8 & 5);
  22 }
  23
  24 int
  25 main ()
  26 {
  27   int i, j;
  28   for (; d;)
  29     {
  30       for (; e;)
  31         fn2 ();
  32       f = 0;
  33     }
  34   for (i = 0; i < 8; i++)
  35     {
  36       if (f)
  37         i = 9;
  38       for (j = 0; j < 7; j++)
  39         fn2 ();
  40     }
  41
  42   if (b != 0)
  43     __builtin_abort ();
  44
  45   return 0;
  46 }