https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116576
--- Comment #1 from LIU Hao <lh_mouse at 126 dot com> ---
Here is a longer solution but it breaks the dependency:
```
31c0 ; xor eax, eax
48 ffc8 ; dec rax
48 d1e8 ; shr rax
; (8 bytes; no dependency)
```
