[Bug tree-optimization/126934] [17 Regression] Wrong code at -O2 on x86_64-pc-linux-gnu

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=126934

--- Comment #3 from Drea Pinski <pinskia at gcc dot gnu.org> ---
I see how Daniel's patch goes wrong and how to fix it.