[Bug middle-end/59409] [4.9 Regression] 253.perlbmk in SPEC CPU 2K is miscompiled

[rguenther at suse dot de]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59409

--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
"hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org> wrote:
>http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59409
>
>--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> ---
>slpeel_tree_peel_loop_to_edge has comments:
>
>  The first guard is:
>     if (FIRST_NITERS == 0) then skip the first loop,
>     and go directly to the second loop.
>
>This is removed by r205730.

It's implemented in terms of scalar loop iterations (latch execution count).