[Bug tree-optimization/98908] Failure to optimize arithmetic involving struct members into operating on the entire struct

[gabravier at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98908

--- Comment #5 from Gabriel Ravier <gabravier at gmail dot com> ---
It may have been doing it in GCC 8 (and 9, and 10), but it didn't in 11, and
presumably this was also the case in trunk back in February.