[Bug tree-optimization/43768] New: VRP destroys loop form

[rguenth at gcc dot gnu dot org]

For the testcase in PR43571 when not disabling VRP complete unrolling can
not figure out the number of iterations because VRP jump threading destroys
proper loop form.


-- 
           Summary: VRP destroys loop form
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43768