[Bug middle-end/115913] [11/12/13/14/15 Regression] ICE with pragma GCC pop_options with diagnostic since r11-1141

[lhyatt at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=115913

--- Comment #8 from Lewis Hyatt <lhyatt at gcc dot gnu.org> ---
I think they are for different things, push_options/pop_options is for saving
and restoring the command line flags that get implied from switching
optimization levels or target pragmas, while diagnostic pragmas are for turning
and and off warnings flags. So I guess another alternative to the patch I
posted would be, #pragma GCC pop_options could ignore all warnings-related
options when doing its checking? I'm not sure if it was intentional that it
wanted to check those or not.