gcc/testsuite/gcc.dg/unroll-3.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-cunrolli-details -fno-peel-loops -fno-tree-vrp -fdisable-tree-cunrolli=foo -fenable-tree-cunrolli=foo" } */
   3
   4 unsigned a[100], b[100];
   5 inline void bar()
   6 {
   7  a[10] = b[10];
   8 }
   9
  10 int foo(void)
  11 {
  12   int i;
  13   bar();
  14   for (i = 0; i < 2; i++)
  15   {
  16      a[i]= b[i] + 1;
  17   }
  18   return 1;
  19 }
  20
  21 int foo2(void)
  22 {
  23   int i;
  24   for (i = 0; i < 2; i++)
  25   {
  26      a[i]= b[i] + 1;
  27   }
  28   return 1;
  29 }
  30
  31 /* { dg-final { scan-tree-dump-times "loop with 2 iterations completely unrolled" 1 "cunrolli" } } */