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

[rguenth at gcc dot gnu.org]

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

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Status|NEW                         |ASSIGNED
           Assignee|unassigned at gcc dot gnu.org      |rguenth at gcc dot 
gnu.org

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 44145
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=44145&action=edit
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.