https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85804
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |WAITING
--- Comment #12 from Richard Biener <rguenth at gcc dot gnu.org> ---
It looks like we now classify as VMAT_ELEMENTWISE (but we don't actually dump
the choice) and fail to vectorize because of cost issues and the vectorization
with -fno-vect-cost-model is different enough.
So fixed on trunk? Can somebody bisect what fixed it? I suppose it was
commit 04b99da898a9817e72fedb4063589648b7961ac5
Author: Richard Biener <[email protected]>
Date: Thu Oct 1 15:12:35 2020 +0200
tree-optimization/97236 - fix bad use of VMAT_CONTIGUOUS
This avoids using VMAT_CONTIGUOUS with single-element interleaving
when using V1mode vectors. Instead keep VMAT_ELEMENTWISE but
continue to avoid load-lanes and gathers.
2020-10-01 Richard Biener <[email protected]>
PR tree-optimization/97236
* tree-vect-stmts.c (get_group_load_store_type): Keep
VMAT_ELEMENTWISE for single-element vectors.
* gcc.dg/vect/pr97236.c: New testcase.
which sounds like a duplicate?
