gcc/testsuite/gcc.dg/loop-unswitch-5.c

   1 /* PR middle-end/71691 */
   2 /* { dg-do run } */
   3 /* { dg-options "-fno-tree-vrp -O2 -funswitch-loops -fdump-tree-unswitch-details" } */
   4
   5 /* Note: The -fno-tree-vrp above is only there to avoid VRP papering
   6    over the problem.  */
   7
   8 char b;
   9 short f;
  10 unsigned e;
  11 int g = 20;
  12
  13 void
  14 foo ()
  15 {
  16   int l, h;
  17   for (l = 0; l <= 7; l++)
  18     {
  19       int j = 38;
  20       if (g)
  21         h = 0;
  22       for (; h <= 7; h++)
  23         {
  24           int i, k = b % (j % 4);
  25           g = f;
  26           for (;;)
  27             {
  28               j = 6 || b;
  29               if (e)
  30                 {
  31                   for (; j; --j)
  32                     if (k)
  33                       __builtin_printf ("%d", 9);
  34                   if (i)
  35                     __builtin_printf ("%d", j);
  36                 }
  37               if (l)
  38                 continue;
  39               break;
  40             }
  41           i = f || b;
  42         }
  43     }
  44 }
  45
  46 int
  47 main ()
  48 {
  49   foo ();
  50   return 0;
  51 }