[Bug rtl-optimization/67456] [6 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu

[ktkachov at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67456

--- Comment #2 from ktkachov at gcc dot gnu.org ---
I'll have a look at this testcase since it's the simplest one of them