[Bug target/95531] Failure to use TZCNT for __builtin_ffs

[ubizjak at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95531

--- Comment #4 from Uroš Bizjak <ubizjak at gmail dot com> ---
(In reply to Segher Boessenkool from comment #3)
> What is the question?  4+4 = 16?

Ah, indeed - the question is why combine changes CCCmode compare to CCZmode
compare.