[Bug c++/70744] preincrements possibly double-evaluated in GNU ternaries

[donald.chai at synopsys dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=70744

--- Comment #5 from Donald Chai <donald.chai at synopsys dot com> ---
For what it's worth, post-increments behave as I would expect:

$ cat test.c
int main() {
    int x = 1;
    x++ ?: 0xbeef;
    return x;
}
$ gcc-5 -x c test.c; ./a.out; echo $?
2
$ gcc-5 -x c++ test.c; ./a.out; echo $?
2