[Bug c++/61414] enum class bitfield size-checking needs a separate warning flag controlling it

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414

--- Comment #24 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 20 17:00:02 2019
New Revision: 279654

URL: https://gcc.gnu.org/viewcvs?rev=279654&root=gcc&view=rev
Log:
        Backported from mainline
        2019-11-26  Jakub Jelinek  <jakub@redhat.com>

        PR c++/61414
        * c-attribs.c (handle_mode_attribute): Add mode attribute to
        ENUMERAL_TYPEs.

        * class.c (enum_to_min_precision): New hash_map.
        (enum_min_precision): New function.
        (check_bitfield_decl): Use it.

        * g++.dg/cpp0x/enum23.C: Remove xfail.
        * g++.dg/cpp0x/enum28.C: New test.

Added:
    branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp0x/enum38.C
Modified:
    branches/gcc-9-branch/gcc/c-family/ChangeLog
    branches/gcc-9-branch/gcc/c-family/c-attribs.c
    branches/gcc-9-branch/gcc/cp/ChangeLog
    branches/gcc-9-branch/gcc/cp/class.c
    branches/gcc-9-branch/gcc/testsuite/ChangeLog
    branches/gcc-9-branch/gcc/testsuite/g++.dg/cpp0x/enum23.C