[Bug target/84524] -O3 causes behavior change

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84524

--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43493
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43493&action=edit
gcc8-pr84524.patch

Untested fix.