[Bug rtl-optimization/68189] [4.9/5/6 Regression] wrong code at -Os and above on x86_64-linux-gnu by RTL if-conversion

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68189

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Symptom in the asm is that %ecx is used uninitialized.