[Bug tree-optimization/31178] New: VRP can infer a range for b in a >> b and a << b

[rguenth at gcc dot gnu dot org]

namely [0, n) where n is the width of type a.  (Or better type a's mode to be
safe).  Look at infer_value_range().


-- 
           Summary: VRP can infer a range for b in a >> b and a << b
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: tree-optimization
        AssignedTo: rguenth at gcc dot gnu dot org
        ReportedBy: rguenth at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=31178