[Bug c++/92666] [10 Regression] bogus -Wunused-but-set-variable in gcov.c with -Wno-restrict

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92666

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Dec 20 23:16:58 2019
New Revision: 279681

URL: https://gcc.gnu.org/viewcvs?rev=279681&root=gcc&view=rev
Log:
        PR c++/92666
        * call.c (convert_arg_to_ellipsis): For floating point or
        decltype(nullptr) arguments call mark_rvalue_use.

        * g++.dg/warn/Wunused-var-36.C: New test.

Added:
    trunk/gcc/testsuite/g++.dg/warn/Wunused-var-36.C
Modified:
    trunk/gcc/cp/ChangeLog
    trunk/gcc/cp/call.c
    trunk/gcc/testsuite/ChangeLog