[Bug tree-optimization/85822] [8/9 Regression] Maybe wrong code in VRP since r249150

[rguenther at suse dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85822

--- Comment #7 from rguenther at suse dot de <rguenther at suse dot de> ---
On Fri, 18 May 2018, tetra2005 at gmail dot com wrote:

> https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85822
> 
> --- Comment #6 from Yuri Gribov <tetra2005 at gmail dot com> ---
> (In reply to Richard Biener from comment #5)
> > Created attachment 44145 [details]
> > patch I am testing
> > 
> > I am testing the attached.  Please check how negative values can be handled
> > correctly or why exactly the handling was wrong.
> 
> I think just removing the hunk I mentioned should fix it (I'll test and post to
> gcc-patches today hopefully).

Ok, please make sure to say why not doing anything special for negative
numbers is ok.