[Bug c/98260] volatile triggers incorrect warning "set but not used"

[cvs-commit at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98260

--- Comment #1 from CVS Commits <cvs-commit at gcc dot gnu.org> ---
The master branch has been updated by Martin Uecker <uec...@gcc.gnu.org>:

https://gcc.gnu.org/g:ec13758ed41936bf803640f0dd8c259c034fe4b9

commit r11-6164-gec13758ed41936bf803640f0dd8c259c034fe4b9
Author: Martin Uecker <muec...@gwdg.de>
Date:   Wed Dec 16 23:43:42 2020 +0100

    C: Avoid incorrect warning for volatile in compound expressions [PR98260]

    2020-12-16  Martin Uecker  <muec...@gwdg.de>

    gcc/c/
            PR c/98260
            * c-parser.c (c_parser_expression): Look into
            nop expression when marking expressions as read.

    gcc/testsuite/
            PR c/98260
            * gcc.dg/unused-9.c: New test.