[Bug sanitizer/81212] [6/7/8 Regression] -Wreturn-type is disabled when used together with -fsanitize=return

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81212

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sat Dec  2 07:57:04 2017
New Revision: 255354

URL: https://gcc.gnu.org/viewcvs?rev=255354&root=gcc&view=rev
Log:
        PR c++/81212
        * tree-cfg.c (pass_warn_function_return::execute): Handle
        __builtin_ubsan_handle_missing_return like __builtin_unreachable
        with BUILTINS_LOCATION.

        * g++.dg/ubsan/pr81212.C: New test.
        * g++.dg/ubsan/return-1.C: Add -Wno-return-type to dg-options.
        * g++.dg/ubsan/return-2.C: Likewise.
        * g++.dg/ubsan/return-7.C: Likewise.

Added:
    trunk/gcc/testsuite/g++.dg/ubsan/pr81212.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/testsuite/g++.dg/ubsan/return-1.C
    trunk/gcc/testsuite/g++.dg/ubsan/return-2.C
    trunk/gcc/testsuite/g++.dg/ubsan/return-7.C
    trunk/gcc/tree-cfg.c