[Bug rtl-optimization/64957] [5 Regression] wrong code at -O1, -O2 and -O3 on x86_64-linux-gnu

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64957

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 34682
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34682&action=edit
gcc5-pr64957.patch

Untested fix.