[Bug fortran/66605] -Wunused-parameter causes internal compiler error with gfortran 5.1.0

[manu at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66605

--- Comment #15 from Manuel López-Ibáñez <manu at gcc dot gnu.org> ---
Author: manu
Date: Mon Jun 29 16:25:26 2015
New Revision: 225135

URL: https://gcc.gnu.org/viewcvs?rev=225135&root=gcc&view=rev
Log:
Wunused-parameter warnings are given from cgraph::finalize_function,
which is the middle-end. This is an oddity compared to other
-Wunused-* warnings. Moreover, Fortran has its own definition of
-Wunused-parameter that conflicts with the middle-end definition.

This patch moves the middle-end part of Wunused-parameter to the C/C++
FEs. I'm not sure if other FEs expected this warning to work. If so,
they do not seem to test for it. Ada, for example, explicitly disables
it.

gcc/ChangeLog:

2015-06-29  Manuel López-Ibáñez  <manu@gcc.gnu.org>

        PR fortran/66605
        * cgraphunit.c (cgraph_node::finalize_function): Do not call
        do_warn_unused_parameter.
        * function.c (do_warn_unused_parameter): Move from here.
        * function.h (do_warn_unused_parameter): Do not declare.

gcc/c-family/ChangeLog:

2015-06-29  Manuel López-Ibáñez  <manu@gcc.gnu.org>

        PR fortran/66605
        * c-common.c (do_warn_unused_parameter): Move here.
        * c-common.h (do_warn_unused_parameter): Declare.

gcc/ada/ChangeLog:

2015-06-29  Manuel López-Ibáñez  <manu@gcc.gnu.org>

        PR fortran/66605
        * gcc-interface/misc.c (gnat_post_options): No need to disable
        warn_unused_parameter anymore.

gcc/cp/ChangeLog:

2015-06-29  Manuel López-Ibáñez  <manu@gcc.gnu.org>

        PR fortran/66605
        * decl.c (finish_function): Call do_warn_unused_parameter.

gcc/testsuite/ChangeLog:

2015-06-29  Manuel López-Ibáñez  <manu@gcc.gnu.org>

        PR fortran/66605
        * gfortran.dg/wunused-parameter.f90: New test.

gcc/c/ChangeLog:

2015-06-29  Manuel López-Ibáñez  <manu@gcc.gnu.org>

        PR fortran/66605
        * c-decl.c (finish_function): Call do_warn_unused_parameter.

Added:
    trunk/gcc/testsuite/gfortran.dg/wunused-parameter.f90
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/ada/ChangeLog
    trunk/gcc/ada/gcc-interface/misc.c
    trunk/gcc/c-family/ChangeLog
    trunk/gcc/c-family/c-common.c
    trunk/gcc/c-family/c-common.h
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-decl.c
    trunk/gcc/cgraphunit.c
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/decl.c
    trunk/gcc/function.c
    trunk/gcc/function.h
    trunk/gcc/testsuite/ChangeLog