https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91103
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |rguenth at gcc dot gnu.org
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
So when the vectorizer has the need to use strided stores it would be cheapest
to spill the vector and do N element loads and stores? I guess we can easily
get bottle-necked by the load/store op bandwith here? That is, the
vectorizer needs
for (lane)
dest[stride * lane] = vector[lane];
thus store a specific (constant) lane of a vector to memory, for each
vector lane. (we could use a scatter store here but only AVX512 has that
and builing the index vector could be tricky and not supported for all
element types)
