gcc/testsuite/gcc.dg/unroll-7.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-tree-vectorize -fdump-rtl-loop2_unroll-details -funroll-loops" } */
   3 /* { dg-require-effective-target int32plus } */
   4
   5 extern int *a;
   6
   7 int t(void)
   8 {
   9   int i;
  10   for (i=0;i<1000000;i++)
  11     a[i]++;
  12 }
  13 /* { dg-final { scan-rtl-dump "Unrolled loop" "loop2_unroll" } } */
  14 /* { dg-final { scan-rtl-dump "number of iterations: .const_int 999999" "loop2_unroll" } } */
  15 /* { dg-final { scan-rtl-dump "upper bound: 999999" "loop2_unroll" } } */
  16 /* { dg-final { scan-rtl-dump "realistic bound: 999999" "loop2_unroll" } } */
  17 /* { dg-final { scan-rtl-dump "considering unrolling loop with constant number of iterations" "loop2_unroll" } } */
  18 /* { dg-final { scan-rtl-dump-not "Invalid sum" "loop2_unroll" } } */