[Bug tree-optimization/90020] [7/8/9 regression] -O2 -Os x86-64 wrong code generated for GNU Emacs

[marxin at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90020

--- Comment #5 from Martin Liška <marxin at gcc dot gnu.org> ---
Created attachment 46109
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=46109&action=edit
Reduced test-case #1