[Bug target/107259] Vectorize VxHF _Float16 modes using partial vectors without -mavx512vl

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=107259

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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             Target|                            |x86_64-*-*

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
The question is whether the backend should announce "VL" support and fixup
using masks transparently?

The vectorizer at the moment would require a fully masked loop (it doesn't
support the special case of loop vectorizing just the "last" iteration as
masked).  The SLP vectorizer does not consider using masked larger vectors
either.