gcc/testsuite/gcc.dg/unroll_5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -fdump-rtl-loop2_unroll -funroll-loops" } */
   3 void abort (void);
   4 int *a;
   5 int t()
   6 {
   7    int i;
   8   for (i=0;i<1000000;i++)
   9     if (a[i])
  10       return 1;
  11   return 0;
  12 }
  13 int t2()
  14 {
  15    int i;
  16   for (i=0;i<3000000;i++)
  17     if (a[i])
  18         abort ();
  19   return 0;
  20 }
  21 /* { dg-final { scan-rtl-dump-times "upper bound: 999999" 1 "loop2_unroll" } } */
  22 /* { dg-final { scan-rtl-dump-not "realistic bound: 999999" "loop2_unroll" } } */
  23 /* { dg-final { scan-rtl-dump-times "upper bound: 2999999" 1 "loop2_unroll" } } */
  24 /* { dg-final { scan-rtl-dump-times "realistic bound: 2999999" 1 "loop2_unroll" } } */
  25 /* { dg-final { cleanup-rtl-dump "loop2_unroll" } } */