Ok.
David
On Fri, Jan 17, 2014 at 9:08 AM, Dehao Chen <de...@google.com> wrote:
> If a loop is cunrolled/vectorized, the AutoFDO computed trip count
> will be very small. This patch disallows overwritting of precomputed
> loop bound in AutoFDO mode.
>
> Bootstrapped and passed regression test. Performance test on-going.
>
> OK for Google branches?
>
> Thanks,
> Dehao
>
> Index: tree-ssa-loop-niter.c
> ===================================================================
> --- tree-ssa-loop-niter.c (revision 206674)
> +++ tree-ssa-loop-niter.c (working copy)
> @@ -2520,7 +2520,8 @@ record_niter_bound (struct loop *loop, double_int
> }
> if (realistic
> && (!loop->any_estimate
> - || i_bound.ult (loop->nb_iterations_estimate)))
> + || (!flag_auto_profile &&
> + i_bound.ult (loop->nb_iterations_estimate))))
> {
> loop->any_estimate = true;
> loop->nb_iterations_estimate = i_bound;
