[Bug target/120434] (x86-64) GCC uses 'movsxd' for positive variables which is larger code than 'mov'

[Explorer09 at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=120434

--- Comment #2 from Kang-Che Sung <Explorer09 at gmail dot com> ---
(Sorry I didn't know what happened with the bug report system, but I submitted
an empty report by accident. I added the report in comment 1.)