Re: New patch for PR tree-optimization/32087, ICE on -fprefetch-loop-arrays

["Richard Guenther" <richard dot guenther at gmail dot com>]

On 7/25/07, Steve Ellcey <sje@cup.hp.com> wrote:
> I submitted an earlier patch
> (http://gcc.gnu.org/ml/gcc-patches/2007-06/msg00357.html) for this PR
> that checked for a zero inside scale_bbs_frequencies_int.  This patch
> checks for zero before calling scale_bbs_frequencies_int (in
> tree_transform_and_unroll_loop).
>
> Functions like remove_empty_loop and scale_dominated_blocks_in_loop
> already have checks in them to make sure scale_bbs_frequencies_int is
> not called in cases where a division by zero might happen so it seems
> reasonable to check it here too.
>
> Tested on IA64 HP-UX and Linux.
>
> OK for checkin?

This is ok.

Thanks,
Richard.

> 2007-06-06  Steve Ellcey  <sje@cup.hp.com>
>
>         PR tree-optimization/32087
>         * tree-ssa-loop-manip.c (tree_transform_and_unroll_loop):
>         Do not call scale_bbs_frequencies_int with prob of zero.