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Date: Sun, 21 Dec 2008 10:47:00 -0000
Subject: [Bug fortran/38592]  New: eliminate constant string comparisons
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$ cat foo.f90
program main
  character(len=3) :: a
  a = 'yes'
  print *,'yes' == a
end program main
$ gfortran -fdump-tree-optimized -O3 -S foo.f90
$ grep compare_string foo.s
        call    _gfortran_compare_string


-- 
           Summary: eliminate constant string comparisons
           Product: gcc
           Version: 4.4.0
            Status: UNCONFIRMED
          Severity: enhancement
          Priority: P3
         Component: fortran
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: tkoenig at gcc dot gnu dot org
OtherBugsDependingO 19276,36854
             nThis:


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