gcc/testsuite/gcc.dg/unroll_5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O3 -fdump-rtl-loop2_unroll -funroll-loops" } */
   3 /* { dg-require-effective-target int32plus } */
   4
   5 void abort (void);
   6 int *a;
   7 int t()
   8 {
   9    int i;
  10   for (i=0;i<1000000;i++)
  11     if (a[i])
  12       return 1;
  13   return 0;
  14 }
  15 int t2()
  16 {
  17    int i;
  18   for (i=0;i<3000000;i++)
  19     if (a[i])
  20         abort ();
  21   return 0;
  22 }
  23 /* { dg-final { scan-rtl-dump-times "upper bound: 999999" 1 "loop2_unroll" } } */
  24 /* { dg-final { scan-rtl-dump-not "realistic bound: 999999" "loop2_unroll" } } */
  25 /* { dg-final { scan-rtl-dump-times "upper bound: 2999999" 1 "loop2_unroll" } } */
  26 /* { dg-final { scan-rtl-dump-times "realistic bound: 2999999" 1 "loop2_unroll" } } */
  27 /* { dg-final { cleanup-rtl-dump "loop2_unroll" } } */