[Bug c/79983] Improve enum and struct redefinition diagnostic

[mpolacek at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79983

--- Comment #1 from Marek Polacek <mpolacek at gcc dot gnu.org> ---
Author: mpolacek
Date: Tue Jun  6 17:40:34 2017
New Revision: 248927

URL: https://gcc.gnu.org/viewcvs?rev=248927&root=gcc&view=rev
Log:
        PR c/79983
        * c-decl.c (start_struct): Use the location of TYPE_STUB_DECL of
        ref.
        (start_enum): Use the location of TYPE_STUB_DECL of enumtype.

        * gcc.dg/pr79983.c: New test.

Added:
    trunk/gcc/testsuite/gcc.dg/pr79983.c
Modified:
    trunk/gcc/c/ChangeLog
    trunk/gcc/c/c-decl.c
    trunk/gcc/testsuite/ChangeLog