[Bug fortran/55343] New: Renamed C_PTR entities are not treated as equivalent types.

[Bug fortran/55343] New: Renamed C_PTR entities are not treated as equivalent types.

[juno.krahn at nih dot gov]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55343

             Bug #: 55343
           Summary: Renamed C_PTR entities are not treated as equivalent
                    types.
    Classification: Unclassified
           Product: gcc
           Version: 4.6.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: fortran
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: juno.krahn@nih.gov


When the intrinsic C_PTR type is accessed via a local name, it is no longer
treated as equivalent to the C_PTR type under either the original name or any
other different local name.

Example code: (test_rename.f90)
---------------------
module my_mod
  implicit none
  type int_type
    integer :: i
  end type int_type
end module my_mod
program main
  use iso_c_binding, only: C_void_ptr=>C_ptr, C_string_ptr=>C_ptr
  use my_mod, only: i1_type=>int_type, i2_type=>int_type
  implicit none
  type(C_string_ptr) :: p_string
  type(C_void_ptr) :: p_void
  type (i1_type) :: i1
  type (i2_type) :: i2
  p_void = p_string
  i1 = i2
end program main
-------------------------------

Result:
$ gfortran -c test_rename.f90
test_rename.f90:15.11:

  p_void = p_string
           1
Error: Can't convert TYPE(c_string_ptr) to TYPE(c_void_ptr) at (1)


I included a user defined derived type to illustrate that the equivalence of
renamed entities in that case works as expected. This used to work in Gnu
fortran, but I don't know what version I was using at that time.

(For comparison: Intel compilers handle it correctly. The latest Sun/Oracle
works when assigning from C_PTR to a renamed entity, but not the other way
around.)

[Bug fortran/55343] Renamed C_PTR entities are not treated as equivalent types.

[dominiq at lps dot ens.fr]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55343

Dominique d'Humieres <dominiq at lps dot ens.fr> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
   Last reconfirmed|                            |2013-03-03
                 CC|                            |mikael.morin at sfr dot fr
     Ever Confirmed|0                           |1

--- Comment #1 from Dominique d'Humieres <dominiq at lps dot ens.fr> 2013-03-03 17:31:33 UTC ---
> ... This used to work in Gnu
> fortran, but I don't know what version I was using at that time.

I did not do an exhaustive search, but the test gives an error for all the
versions I have tried.

Note the test compiles without error with the Mikael's patch at
http://gcc.gnu.org/ml/fortran/2013-03/msg00008.html .

[Bug fortran/55343] Renamed C_PTR entities are not treated as equivalent types.

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55343

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |burnus at gcc dot gnu.org

--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> 2013-03-25 15:54:40 UTC ---
Author: burnus
Date: Mon Mar 25 15:40:26 2013
New Revision: 197053

URL: http://gcc.gnu.org/viewcvs?rev=197053&root=gcc&view=rev
Log:
2013-03-25  Tobias Burnus  <burnus@net-b.de>

        PR fortran/38536
        PR fortran/38813
        PR fortran/38894
        PR fortran/39288
        PR fortran/40963
        PR fortran/45824
        PR fortran/47023
        PR fortran/47034
        PR fortran/49023
        PR fortran/50269
        PR fortran/50612
        PR fortran/52426
        PR fortran/54263
        PR fortran/55343
        PR fortran/55444
        PR fortran/55574
        PR fortran/56079
        PR fortran/56378
        * check.c (gfc_var_strlen): Properly handle 0-sized string.
        (gfc_check_c_sizeof): Use is_c_interoperable, add checks.
        (is_c_interoperable, gfc_check_c_associated, gfc_check_c_f_pointer,
        gfc_check_c_f_procpointer, gfc_check_c_funloc, gfc_check_c_loc): New
        functions.
        * expr.c (check_inquiry): Add c_sizeof, compiler_version and
        compiler_options.
        (gfc_check_pointer_assign): Refine function result check.
        gfortran.h (gfc_isym_id): Add GFC_ISYM_C_ASSOCIATED,
        GFC_ISYM_C_F_POINTER, GFC_ISYM_C_F_PROCPOINTER, GFC_ISYM_C_FUNLOC,
        GFC_ISYM_C_LOC.
        (iso_fortran_env_symbol, iso_c_binding_symbol): Handle
        NAMED_SUBROUTINE.
        (generate_isocbinding_symbol): Update prototype.
        (get_iso_c_sym): Remove.
        (gfc_isym_id_by_intmod, gfc_isym_id_by_intmod_sym): New prototypes.
        * intrinsic.c (gfc_intrinsic_subroutine_by_id): New function.
        (gfc_intrinsic_sub_interface): Use it.
        (add_functions, add_subroutines): Add missing C-binding intrinsics.
        (gfc_intrinsic_func_interface): Add special case for c_loc.
        gfc_isym_id_by_intmod, gfc_isym_id_by_intmod_sym): New functions.
        (gfc_intrinsic_func_interface, gfc_intrinsic_sub_interface): Use them.
        * intrinsic.h (gfc_check_c_associated, gfc_check_c_f_pointer,
        gfc_check_c_f_procpointer, gfc_check_c_funloc, gfc_check_c_loc,
        gfc_resolve_c_loc, gfc_resolve_c_funloc): New prototypes.
        * iresolve.c (gfc_resolve_c_loc, gfc_resolve_c_funloc): New
        functions.
        * iso-c-binding.def: Split PROCEDURE into NAMED_SUBROUTINE and
        NAMED_FUNCTION.
        * iso-fortran-env.def: Add NAMED_SUBROUTINE for completeness.
        * module.c (create_intrinsic_function): Support subroutines and
        derived-type results.
        (use_iso_fortran_env_module): Update calls.
        (import_iso_c_binding_module): Ditto; update calls to
        generate_isocbinding_symbol.
        * resolve.c (find_arglists): Skip for intrinsic symbols.
        (gfc_resolve_intrinsic): Find intrinsic subs via id.
        (is_scalar_expr_ptr, gfc_iso_c_func_interface,
        set_name_and_label, gfc_iso_c_sub_interface): Remove.
        (resolve_function, resolve_specific_s0): Remove calls to those.
        (resolve_structure_cons): Fix handling.
        * symbol.c (gen_special_c_interop_ptr): Update c_ptr/c_funptr
        generation.
        (gen_cptr_param, gen_fptr_param, gen_shape_param,
        build_formal_args, get_iso_c_sym): Remove.
        (std_for_isocbinding_symbol): Handle NAMED_SUBROUTINE.
        (generate_isocbinding_symbol): Support hidden symbols and
        using c_ptr/c_funptr symtrees for nullptr defs.
        * target-memory.c (gfc_target_encode_expr): Fix handling
        of c_ptr/c_funptr.
        * trans-expr.c (conv_isocbinding_procedure): Remove.
        (gfc_conv_procedure_call): Remove call to it.
        (gfc_trans_subcomponent_assign, gfc_conv_expr): Update handling
        of c_ptr/c_funptr.
        * trans-intrinsic.c (conv_isocbinding_function,
        conv_isocbinding_subroutine): New.
        (gfc_conv_intrinsic_function, gfc_conv_intrinsic_subroutine):
        Call them.
        * trans-io.c (transfer_expr): Fix handling of c_ptr/c_funptr.
        * trans-types.c (gfc_typenode_for_spec,
        gfc_get_derived_type): Ditto.
        (gfc_init_c_interop_kinds): Handle NAMED_SUBROUTINE.

2013-03-25  Tobias Burnus  <burnus@net-b.de>

        PR fortran/38536
        PR fortran/38813
        PR fortran/38894
        PR fortran/39288
        PR fortran/40963
        PR fortran/45824
        PR fortran/47023
        PR fortran/47034
        PR fortran/49023
        PR fortran/50269
        PR fortran/50612
        PR fortran/52426
        PR fortran/54263
        PR fortran/55343
        PR fortran/55444
        PR fortran/55574
        PR fortran/56079
        PR fortran/56378
        * gfortran.dg/c_assoc_2.f03: Update dg-error wording.
        * gfortran.dg/c_f_pointer_shape_test.f90: Ditto.
        * gfortran.dg/c_f_pointer_shape_tests_3.f03: Ditto.
        * gfortran.dg/c_f_pointer_tests_5.f90: Ditto.
        * gfortran.dg/c_funloc_tests_2.f03: Ditto.
        * gfortran.dg/c_funloc_tests_5.f03: Ditto.
        * gfortran.dg/c_funloc_tests_6.f90: Ditto.
        * gfortran.dg/c_loc_tests_10.f03: Add -std=f2008.
        * gfortran.dg/c_loc_tests_11.f03: Ditto, update dg-error.
        * gfortran.dg/c_loc_tests_16.f90: Ditto.
        * gfortran.dg/c_loc_tests_4.f03: Ditto.
        * gfortran.dg/c_loc_tests_15.f90: Update dg-error wording.
        * gfortran.dg/c_loc_tests_3.f03: Valid since F2003 TC5.
        * gfortran.dg/c_loc_tests_8.f03: Ditto.
        * gfortran.dg/c_ptr_tests_14.f90: Update scan-tree-dump-times.
        * gfortran.dg/c_ptr_tests_15.f90: Ditto.
        * gfortran.dg/c_sizeof_1.f90: Fix invalid code.
        * gfortran.dg/iso_c_binding_init_expr.f03: Update dg-error wording.
        * gfortran.dg/pr32601_1.f03: Ditto.
        * gfortran.dg/storage_size_2.f08: Remove dg-error.
        * gfortran.dg/blockdata_7.f90: New.
        * gfortran.dg/c_assoc_4.f90: New.
        * gfortran.dg/c_f_pointer_tests_6.f90: New.
        * gfortran.dg/c_f_pointer_tests_7.f90: New.
        * gfortran.dg/c_funloc_tests_8.f90: New.
        * gfortran.dg/c_loc_test_17.f90: New.
        * gfortran.dg/c_loc_test_18.f90: New.
        * gfortran.dg/c_loc_test_19.f90: New.
        * gfortran.dg/c_loc_test_20.f90: New.
        * gfortran.dg/c_sizeof_5.f90: New.
        * gfortran.dg/iso_c_binding_rename_3.f90: New.
        * gfortran.dg/transfer_resolve_2.f90: New.
        * gfortran.dg/transfer_resolve_3.f90: New.
        * gfortran.dg/transfer_resolve_4.f90: New.
        * gfortran.dg/pr32601.f03: Update dg-error.
        * gfortran.dg/c_ptr_tests_13.f03: Update dg-error.
        * gfortran.dg/c_ptr_tests_9.f03: Fix test case.


Added:
    trunk/gcc/testsuite/gfortran.dg/blockdata_7.f90
    trunk/gcc/testsuite/gfortran.dg/c_assoc_4.f90
    trunk/gcc/testsuite/gfortran.dg/c_f_pointer_tests_6.f90
    trunk/gcc/testsuite/gfortran.dg/c_f_pointer_tests_7.f90
    trunk/gcc/testsuite/gfortran.dg/c_funloc_tests_8.f90
    trunk/gcc/testsuite/gfortran.dg/c_loc_test_17.f90
    trunk/gcc/testsuite/gfortran.dg/c_loc_test_18.f90
    trunk/gcc/testsuite/gfortran.dg/c_loc_test_19.f90
    trunk/gcc/testsuite/gfortran.dg/c_loc_test_20.f90
    trunk/gcc/testsuite/gfortran.dg/c_loc_tests_17.f90
    trunk/gcc/testsuite/gfortran.dg/c_sizeof_5.f90
    trunk/gcc/testsuite/gfortran.dg/iso_c_binding_rename_3.f90
    trunk/gcc/testsuite/gfortran.dg/transfer_resolve_2.f90
    trunk/gcc/testsuite/gfortran.dg/transfer_resolve_3.f90
    trunk/gcc/testsuite/gfortran.dg/transfer_resolve_4.f90
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/check.c
    trunk/gcc/fortran/expr.c
    trunk/gcc/fortran/gfortran.h
    trunk/gcc/fortran/intrinsic.c
    trunk/gcc/fortran/intrinsic.h
    trunk/gcc/fortran/iresolve.c
    trunk/gcc/fortran/iso-c-binding.def
    trunk/gcc/fortran/iso-fortran-env.def
    trunk/gcc/fortran/module.c
    trunk/gcc/fortran/resolve.c
    trunk/gcc/fortran/symbol.c
    trunk/gcc/fortran/target-memory.c
    trunk/gcc/fortran/trans-expr.c
    trunk/gcc/fortran/trans-intrinsic.c
    trunk/gcc/fortran/trans-io.c
    trunk/gcc/fortran/trans-types.c
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/gfortran.dg/c_assoc_2.f03
    trunk/gcc/testsuite/gfortran.dg/c_f_pointer_shape_test.f90
    trunk/gcc/testsuite/gfortran.dg/c_f_pointer_shape_tests_3.f03
    trunk/gcc/testsuite/gfortran.dg/c_f_pointer_tests_5.f90
    trunk/gcc/testsuite/gfortran.dg/c_funloc_tests_2.f03
    trunk/gcc/testsuite/gfortran.dg/c_funloc_tests_5.f03
    trunk/gcc/testsuite/gfortran.dg/c_funloc_tests_6.f90
    trunk/gcc/testsuite/gfortran.dg/c_loc_tests_10.f03
    trunk/gcc/testsuite/gfortran.dg/c_loc_tests_11.f03
    trunk/gcc/testsuite/gfortran.dg/c_loc_tests_15.f90
    trunk/gcc/testsuite/gfortran.dg/c_loc_tests_16.f90
    trunk/gcc/testsuite/gfortran.dg/c_loc_tests_3.f03
    trunk/gcc/testsuite/gfortran.dg/c_loc_tests_4.f03
    trunk/gcc/testsuite/gfortran.dg/c_loc_tests_8.f03
    trunk/gcc/testsuite/gfortran.dg/c_ptr_tests_13.f03
    trunk/gcc/testsuite/gfortran.dg/c_ptr_tests_14.f90
    trunk/gcc/testsuite/gfortran.dg/c_ptr_tests_15.f90
    trunk/gcc/testsuite/gfortran.dg/c_ptr_tests_9.f03
    trunk/gcc/testsuite/gfortran.dg/c_sizeof_1.f90
    trunk/gcc/testsuite/gfortran.dg/iso_c_binding_init_expr.f03
    trunk/gcc/testsuite/gfortran.dg/pr32601.f03
    trunk/gcc/testsuite/gfortran.dg/pr32601_1.f03
    trunk/gcc/testsuite/gfortran.dg/storage_size_2.f08

[Bug fortran/55343] Renamed C_PTR entities are not treated as equivalent types.

[burnus at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55343

Tobias Burnus <burnus at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |FIXED

--- Comment #3 from Tobias Burnus <burnus at gcc dot gnu.org> 2013-03-25 17:53:02 UTC ---
FIXED on the 4.9 trunk.

Thanks for the report.