[Bug fortran/54833] New: Don't wrap __builtin_free(a) in if (a != NULL)

["tkoenig at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54833

             Bug #: 54833
           Summary: Don't wrap __builtin_free(a) in if (a != NULL)
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: tkoenig@gcc.gnu.org
        ReportedBy: tkoenig@gcc.gnu.org


The Fortran front end at the moment generates many calls
to __builtin_free with

      if (a.data != 0B)
        {
          __builtin_free ((void *) a.data);
        }
      a.data = 0B;

This is not necessary, because free(NULL) is well-defined no-op.