[Bug middle-end/117841] Miscompile with -O3 and -O0/1/2

[yunboni at smail dot nju.edu.cn via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117841

--- Comment #1 from Yunbo Ni <yunboni at smail dot nju.edu.cn> ---
Bisected to
https://gcc.gnu.org/git/?p=gcc.git;a=commit;h=6bf66276e3e41d5d92f7b7260e98b6a111653805