[Bug tree-optimization/88693] [9 Regression] Wrong code since r263018

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88693

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 45346
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=45346&action=edit
gcc9-pr88693.patch

Untested fix.