gcc/testsuite/gcc.dg/tree-ssa/cunroll-4.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -fdump-tree-ivcanon-details" } */
   3 int a[1];
   4 test(int c)
   5 {
   6   int i=0,j;
   7   for (i=0;i<c;i++)
   8     {
   9       for (j=0;j<c;j++)
  10         {
  11           a[i]=5;
  12           test2();
  13         }
  14     }
  15 }
  16
  17 /* We should do this as part of cunrolli, but our cost model do not take into account early exit
  18    from the last iteration.  */
  19 /* { dg-final { scan-tree-dump "loop turned into non-loop; it never loops." "ivcanon"} } */
  20 /* { dg-final { scan-tree-dump "Last iteration exit edge was proved true." "ivcanon"} } */
  21 /* { dg-final { cleanup-tree-dump "ivcanon" } } */