[Bug target/110921] Relax _tzcnt_u32 support on x86_64, all x86_64 arch support for this instruction

[luoyonggang at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110921

--- Comment #14 from 罗勇刚(Yonggang Luo) <luoyonggang at gmail dot com> ---
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=118342
is a duplicated of this