[Bug c++/77722] -fsanitize=undefined doesn't give runtime error in function without return value, unless at least 2 instructions

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=77722

--- Comment #3 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Wed Dec  7 22:35:29 2016
New Revision: 243389

URL: https://gcc.gnu.org/viewcvs?rev=243389&root=gcc&view=rev
Log:
        Backported from mainline
        2016-09-27  Jakub Jelinek  <jakub@redhat.com>

        PR c++/77722
        * cp-gimplify.c (cp_ubsan_maybe_instrument_return): Instrument also
        functions that have just a STATEMENT_LIST instead of BIND_EXPR, or
        BIND_EXPR with some statement rather than STATEMENT_LIST as body.

        * g++.dg/ubsan/return-4.C: New test.
        * g++.dg/ubsan/return-5.C: New test.
        * g++.dg/ubsan/return-6.C: New test.

Added:
    branches/gcc-6-branch/gcc/testsuite/g++.dg/ubsan/return-4.C
    branches/gcc-6-branch/gcc/testsuite/g++.dg/ubsan/return-5.C
    branches/gcc-6-branch/gcc/testsuite/g++.dg/ubsan/return-6.C
Modified:
    branches/gcc-6-branch/gcc/cp/ChangeLog
    branches/gcc-6-branch/gcc/cp/cp-gimplify.c
    branches/gcc-6-branch/gcc/testsuite/ChangeLog