[Bug c/88660] [8/9/10 Regression] Invalid report of "set but used variable" with -O

[cvs-commit at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88660

--- Comment #3 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Jeff Law <l...@gcc.gnu.org>:

https://gcc.gnu.org/g:f9eb0973edb2b4eed4cdbba7105b8af7afe5b547

commit r10-6360-gf9eb0973edb2b4eed4cdbba7105b8af7afe5b547
Author: Jeff Law <l...@redhat.com>
Date:   Thu Jan 30 14:09:41 2020 -0700

    Mark switch expression as used to avoid bogus warning

            PR c/88660
            * c-parser.c (c_parser_switch_statement): Make sure to request
            marking the switch expr as used.

            PR c/88660
            * gcc.dg/pr88660.c: New test.