[Bug c/110169] wrong code with '-Ofast'

[19373742 at buaa dot edu.cn via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110169

--- Comment #1 from CTC <19373742 at buaa dot edu.cn> ---
Created attachment 55283
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=55283&action=edit
The compiler output