[Bug tree-optimization/92772] wrong code vectorizing masked max

[ams at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92772

--- Comment #3 from Andrew Stubbs <ams at gcc dot gnu.org> ---
The GCN architecture can handle the masking, but I don't know how we'd
represent or apply that in the middle end?

I can probably implement extract_last, and that might be more efficient, but I
don't see how that will help the logic? The convoluted extraction is working
fine; it's the vector comparison that is misleading.