[Bug fortran/38592] eliminate some string comparisons

[tkoenig at gcc dot gnu dot org]

------- Comment #1 from tkoenig at gcc dot gnu dot org  2008-12-21 12:03 -------
To clarify, we could detect that the variable only ever
has the value of 'yes'.  We already do the right
thing with constants:

$ cat foo-2.f90
program main
  character(len=3), parameter :: a = 'yes'
  print *,'yes' == a
end program main
$ gfortran -fdump-tree-original foo-2.f90
$ grep compare foo-2.f90.003t.original
$ 


-- 

tkoenig at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization
           Priority|P3                          |P5
            Summary|eliminate constant string   |eliminate some string
                   |comparisons                 |comparisons


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38592