https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116571
--- Comment #5 from Richard Biener <rguenth at gcc dot gnu.org> ---
(In reply to Thomas Schwinge from comment #4)
> The GCN target FAILs that I originally had reported here:
>
> > [-PASS:-]{+FAIL:+} gcc.dg/vect/slp-11a.c scan-tree-dump-times vect
> > "vectorizing stmts using SLP" [-0-]{+1+}
>
> > [-PASS:-]{+FAIL:+} gcc.dg/vect/slp-12a.c scan-tree-dump-times vect
> > "vectorizing stmts using SLP" [-0-]{+1+}
>
> ... are back to PASS as of recently; should we close this PR?
I'd say so.
>
> Andrew, anything to be done anyway, regarding the following?
>
> (In reply to Richard Biener from comment #3)
> > Possibly for GCN the issue is the vect_strided8 which is implemented as
> >
> > foreach N {2 3 4 5 6 7 8} {
> > eval [string map [list N $N] {
> > # Return 1 if the target supports 2-vector interleaving
> > proc check_effective_target_vect_stridedN { } {
> > return [check_cached_effective_target_indexed vect_stridedN {
> > if { (N & -N) == N
> > && [check_effective_target_vect_interleave]
> > && [check_effective_target_vect_extract_even_odd] } {
> > return 1
> > }
> > if { ([istarget arm*-*-*]
> > || [istarget aarch64*-*-*]) && N >= 2 && N <= 4 } {
> > return 1
> > }
> > if { ([istarget riscv*-*-*]) && N >= 2 && N <= 8 } {
> > return 1
> > }
> > if [check_effective_target_vect_fully_masked] {
> > return 1
> > }
> >
> > not sure if gcn really supports a load/store-lane with 8 elements.
Note I might have misunderstood the vect_stridedN effective target, but
the last line looks odd (x86 also can do fully masked loops with AVX512
but definitely cannot do arbitrary interleaving schemes just because of that).
I'd remove that last line, it was added by you, Andrew, in
r9-5484-g674931d2b7bd88 ...
