[Bug rtl-optimization/68194] [4.9/5/6 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=68194

--- Comment #11 from ktkachov at gcc dot gnu.org ---
Fixed on trunk.
Will test the patch on 4.9 and GCC 5 and propose backports