[Bug target/85919] Incomplete transition to IFNs for scatter/gather support, drop vectorize.builtin_{gather,scatter} target hooks

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85919

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

           What    |Removed                     |Added
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                 CC|                            |crazylht at gmail dot com

--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
Reading back through the mail thread I think a reasonable simplification on the
x86 backend side would be to only expose mask_gather_load with AVX512VL,
side-stepping the issue of mixed AVX2 + AVX512 style masking with
-mno-avx512lvl.

Re-using the define-insns is probably OK, but the mode-iterators for the
mask_gather_load/store define_expands should be modeled to have the number
of output and offset lanes the same (and accept both AVX2 and AVX512 style
masks).

https://gcc.gnu.org/pipermail/gcc-patches/2021-August/577656.html

had the last actual patch posted.