[Bug tree-optimization/97770] [ICELAKE]suboptimal vectorization for vpopcntw/b/q

[hjl.tools at gmail dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=97770

--- Comment #19 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to rguenther@suse.de from comment #18)
> 
> That's going to work I guess but it will pessimize general optimization
> which no longer know this is computing popcount (not sure if the old
> version exposed that fact).

Do we have testcase for that?