[Bug libfortran/26735] New: -fconvert=swap and implied open

[tkoenig at gcc dot gnu dot org]

$ cat conv-implied-open.f90
program main
  implicit none
  integer (kind=8) :: i1, i2, i3
  write (10) 1_8
  close (10)
  open (10,status="old", form="unformatted", access="direct", recl=8)
  read (10,rec=1) i1
  read (10,rec=2) i2
  read (10,rec=3) i3
  print '(3Z16,1X)',i1,i2,i3
end program main
$ gfortran conv-implied-open.f90
$ ./a.out
               8               1               8
$ gfortran -fconvert=swap conv-implied-open.f90
$ ./a.out
 800000000000000 100000000000000 800000000000000

The second call is incorrect.  The lack of an open
statement means that the information about the byte-swapping
isn't picked up.

This is not really all that serious, because I suspect most people
will give their files descriptive names if they want to move them
across architectures.


-- 
           Summary: -fconvert=swap and implied open
           Product: gcc
           Version: 4.2.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: libfortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tkoenig at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26735