[Bug fortran/51529] [OOP] gfortran.dg/class_to_type_1.f03 is miscompiled: Uninitialized variable used

["pault at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51529

--- Comment #6 from Paul Thomas <pault at gcc dot gnu.org> 2012-01-02 12:46:14 UTC ---
Author: pault
Date: Mon Jan  2 12:46:08 2012
New Revision: 182796

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=182796
Log:
2012-01-02  Paul Thomas  <pault@gcc.gnu.org>

    PR fortran/51529
    * trans-array.c (gfc_array_allocate): Null allocated memory of
    newly allocted class arrays.

    PR fortran/46262
    PR fortran/46328
    PR fortran/51052
    * interface.c(build_compcall_for_operator): Add a type to the
    expression.
    * trans-expr.c (conv_base_obj_fcn_val): New function.
    (gfc_conv_procedure_call): Use base_expr to detect non-variable
    base objects and, ensuring that there is a temporary variable,
    build up the typebound call using conv_base_obj_fcn_val.
    (gfc_trans_class_assign): Pick out class procedure pointer
    assignments and do the assignment with no further prcessing.
    (gfc_trans_class_array_init_assign, gfc_trans_class_init_assign
    gfc_trans_class_assign): Move to top of file.
    * gfortran.h : Add 'base_expr' field to gfc_expr.
    * resolve.c (get_declared_from_expr): Add 'types' argument to
    switch checking of derived types on or off.
    (resolve_typebound_generic_call): Set the new argument.
    (resolve_typebound_function, resolve_typebound_subroutine):
    Set 'types' argument for get_declared_from_expr appropriately.
    Identify base expression, if not a variable, in the argument
    list of class valued calls. Assign it to the 'base_expr' field
    of the final expression. Strip away all references after the
    last class reference.


2012-01-02  Paul Thomas  <pault@gcc.gnu.org>

    PR fortran/46262
    PR fortran/46328
    PR fortran/51052
    * gfortran.dg/typebound_operator_7.f03: New.
    * gfortran.dg/typebound_operator_8.f03: New.

Added:
    trunk/gcc/testsuite/gfortran.dg/typebound_operator_7.f03
    trunk/gcc/testsuite/gfortran.dg/typebound_operator_8.f03
Modified:
    trunk/gcc/fortran/ChangeLog
    trunk/gcc/fortran/dump-parse-tree.c
    trunk/gcc/fortran/gfortran.h
    trunk/gcc/fortran/interface.c
    trunk/gcc/fortran/resolve.c
    trunk/gcc/fortran/trans-array.c
    trunk/gcc/fortran/trans-expr.c
    trunk/gcc/testsuite/ChangeLog