[Bug target/89822] self mov on x86_64 and not optimized-out sub on ARM/ARM64 in a jump table switch

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89822

--- Comment #1 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Nikita Kniazev from comment #0)
> 8.1  jump to ret removed, but self mov is still there
It's not a self move, but zero extend.

        movl    %edi, %edi      # 6     [c=1 l=2]  *zero_extendsidi2/3