[Bug c/21582] New: (optimisation) VRP pass could/should use non-null function attribute

["arjanv at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

The nonnull function attribute specifies that certain pointer arguments to said
function are not allowed to be NULL. The VRP pass could put this in the possible
range for said variables, after which NULL pointer checks inside the function
body (or more likely, functions inlined into that function) can be optimized away.

-- 
           Summary: (optimisation) VRP pass could/should use non-null
                    function attribute
           Product: gcc
           Version: 4.1.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P2
         Component: c
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: arjanv at redhat dot com
                CC: gcc-bugs at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=21582