gcc/testsuite/gcc.dg/unroll-8.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-tree-vectorize -fdump-rtl-loop2_unroll-details-blocks -funroll-loops" } */
   3
   4 struct a {int a[7];};
   5 int t(struct a *a, int n)
   6 {
   7   int i;
   8   for (i=0;i<n;i++)
   9     a->a[i]++;
  10 }
  11 /* { dg-final { scan-rtl-dump-not "Unrolled loop" "loop2_unroll" } } */
  12 /* { dg-final { scan-rtl-dump "likely upper bound: 6" "loop2_unroll" } } */
  13 /* { dg-final { scan-rtl-dump "realistic bound: -1" "loop2_unroll" } } */
  14 /* { dg-final { scan-rtl-dump "Not unrolling loop, doesn't roll" "loop2_unroll" } } */
  15 /* { dg-final { scan-rtl-dump-not "Invalid sum" "loop2_unroll" } } */
  16 /* { dg-final { scan-rtl-dump-not "upper bound: -1" "loop2_unroll" } } */