[Bug tree-optimization/80549] [7/8 Regression] wrong code at -O2 and -O3 in both 32-bit and 64-bit modes on x86_64-linux-gnu (executable does not terminate)

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80549

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Created attachment 41283
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=41283&action=edit
patch

Patch I am testing.