[Bug middle-end/118758] [15 regression] ok code with -O2, but wrong code with -O3

[dcb314 at hotmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118758

--- Comment #2 from David Binderman <dcb314 at hotmail dot com> ---
I will look into a bisection.