[Bug rtl-optimization/68376] [4.9/5/6 Regression] wrong code at -O1 and above on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68376

--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
-fno-if-conversion fixes it.