This function allows to only scalarize instructions down to a desired
vectorization width. nir_lower_alu_to_scalar() was changed to use the
new function with a width of 1.
Swizzles outside vectorization width are considered and reduce
the target width.
This prevents ending up with code like
vec2 16 ssa_2 = iadd ssa_0.xz, ssa_1.xz
which requires to emit shuffle code in backends
and usually is not beneficial.
Reviewed-by: Alyssa Rosenzweig <alyssa@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13080>
2022-06-01 11:41:44 +00:00
Renamed from src/compiler/nir/nir_lower_alu_to_scalar.c (Browse further)
