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
