[Bug fortran/34145] New: single_char_string.f90 fails with -fdefault-integer-8

[tkoenig at gcc dot gnu dot org]

The test case passes, but somehow _gfortran_compare_string
is still called.

$ gfortran -fdump-tree-original -fdefault-integer-8 single_char_string.f90 
$ grep _gfortran.*string single_char_string.f90.003t.original 
    if (_gfortran_compare_string (MAX_EXPR <(1 - D.507) + D.508, 0>, (char[1:5]
*) &c[D.507]{lb: 1 sz: 1}, 1, &b[1]{lb: 1 sz: 1}) != 0)
    if (_gfortran_compare_string (MAX_EXPR <(1 - D.509) + D.510, 0>, (char[1:5]
*) &c[D.509]{lb: 1 sz: 1}, 1, &"a"[1]{lb: 1 sz: 1}) != 0)
    if (_gfortran_compare_string (1, &a[1]{lb: 1 sz: 1}, MAX_EXPR <(1 - D.511)
+ D.512, 0>, (char[1:5] *) &c[D.511]{lb: 1 sz: 1}) > 0)


-- 
           Summary: single_char_string.f90 fails with -fdefault-integer-8
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: missed-optimization
          Severity: enhancement
          Priority: P3
         Component: fortran
        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=34145