Re: [PATCH 2/3][POPCOUNT] Check if zero check is done before entering the loop

[Richard Biener]

On Fri, Jun 22, 2018 at 11:14 AM Kugan Vivekanandarajah
<kugan.vivekanandara...@linaro.org> wrote:
>
> gcc/ChangeLog:

The canonical way is calling simplify_using_initial_conditions on the
may_be_zero condition.

Richard.

> 2018-06-22  Kugan Vivekanandarajah  <kug...@linaro.org>
>
>     * tree-ssa-loop-niter.c (number_of_iterations_popcount): If popcount
>     argument is checked for zero before entering loop, avoid checking again.