gcc/testsuite/gcc.dg/tree-ssa/update-unswitch-1.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1 -funswitch-loops -fdump-tree-unswitch-blocks" } */
   3
   4 int bla(int p)
   5 {
   6   unsigned i, s = 1;
   7
   8   for (i = 4; i < 100; i++)
   9     {
  10       if (p)
  11         s += i/2;
  12       else
  13         s *= i/2;
  14     }
  15
  16   return s;
  17 }
  18
  19 /* We used to make the probability that the first of the loops created
  20    by unswitching is entered 100%, which is not correct.  */
  21
  22 /* { dg-final { scan-tree-dump-not "Invalid sum" "unswitch"} } */
  23 /* { dg-final { scan-tree-dump-not "SUCC: 3 .100.0%" "unswitch"} } */
  24 /* { dg-final { cleanup-tree-dump "unswitch" } } */