On Thu, Oct 16, 2014 at 03:44:50PM +0200, Richard Biener wrote:
> --- gcc/testsuite/gcc.dg/tree-ssa/loop-42.c (revision 0)
> +++ gcc/testsuite/gcc.dg/tree-ssa/loop-42.c (working copy)
> @@ -0,0 +1,19 @@
> +/* { dg-do run } */
> +/* { dg-options "-O2 -fdump-tree-cunroll-details" } */
> +
> +extern void abort (void);
> +int a = -1;
> +int n = sizeof (int);
> +int main()
> +{
> + char *p;
> + int i;
> + for (i = 0, p = (char *)&a; i < n; ++i)
> + *p++ = 0;
> + if (a != 0)
> + abort ();
> + return 0;
> +}
> +
> +/* { dg-final { scan-tree-dump "loop with 4 iterations completely unrolled"
> "cunroll" } } */
This will fail on all targets where sizeof (int) is not 4 :(.
So, I think you need to guard this scan-tree-dump with { target int32 }.
Jakub
