[Bug tree-optimization/83047] [8 regression] glibc/crypt/crypt_util.c gets miscompiled

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83047

--- Comment #5 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 42657
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42657&action=edit
gcc8-pr83047.patch

Untested fix.