[Bug middle-end/66375] [4.8/4.9/5 Regression] wrong code at -O2 and -O3 on x86_64-linux-gnu

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66375

--- Comment #9 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 35678
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=35678&action=edit
patch

What I am testing.