gcc/testsuite/gcc.dg/tree-ssa/loop-23.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -funroll-loops -fdump-tree-cunroll-details" } */
   3
   4 __attribute__ ((pure))
   5 int bla(int);
   6
   7 int foo(void)
   8 {
   9   int i;
  10   int sum;
  11
  12   /* This loop used to appear to be too large for unrolling.  */
  13   for (i = 0; i < 4; i++)
  14     {
  15       sum += bla (i);
  16       sum += bla (2*i);
  17       sum += bla (3*i);
  18       sum += bla (4*i);
  19       sum += bla (5*i);
  20       sum += bla (6*i);
  21       sum += bla (7*i);
  22       sum += bla (8*i);
  23     }
  24   return sum;
  25 }
  26
  27 /* { dg-final { scan-tree-dump-times "Completely unroll loop 3 times" 1 "cunroll" } } */
  28
  29 /* { dg-final { cleanup-tree-dump "cunroll" } } */