[Bug tree-optimization/85446] [7/8 Regression] wrong-code on riscv64

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85446

--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 43972
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=43972&action=edit
gcc8-pr85446.patch

Untested fix.