On Wed, 16 Apr 2025, Tamar Christina wrote:
> Hi All,
>
> The given test is intended to test vectorization of a strided access done by
> having a step of > 1.
>
> GCN target doesn't support load lanes, so the testcase is expected to fail,
> other targets create a permuted load here which we then then reject.
>
> However some GCN arch don't seem to support the permuted loads either, so the
> vectorizer tries a gather/scatter. But the indices aren't supported by some
> target, so instead the vectorizer scalarizes the loads.
>
> I can't really test for which architecture is being used by the compiler, so
> instead this updates the testcase to use one single architecture so we get a
> consistent result.
>
> Bootstrapped Regtested on aarch64-none-linux-gnu and no issues.
>
> Cross checked the failing case on amdgcn-amdhsa
> and all pass now.
>
> Ok for master?
OK.
> Thanks,
> Tamar
>
> gcc/testsuite/ChangeLog:
>
> PR target/119286
> * gcc.dg/vect/vect-early-break_18.c: Force -march=gfx908 for amdgcn.
>
> ---
> diff --git a/gcc/testsuite/gcc.dg/vect/vect-early-break_18.c
> b/gcc/testsuite/gcc.dg/vect/vect-early-break_18.c
> index
> edddb44bad66aa419d097f69ca850e5eaa66e014..cd397049c84c47cbd3e9facb87419de58ba5b148
> 100644
> --- a/gcc/testsuite/gcc.dg/vect/vect-early-break_18.c
> +++ b/gcc/testsuite/gcc.dg/vect/vect-early-break_18.c
> @@ -2,7 +2,7 @@
> /* { dg-do compile } */
> /* { dg-require-effective-target vect_early_break } */
> /* { dg-require-effective-target vect_int } */
> -
> +/* { dg-additional-options "-march=gfx908" { target amdgcn*-*-* } } */
> /* { dg-additional-options "-Ofast" } */
>
> /* { dg-final { scan-tree-dump "LOOP VECTORIZED" "vect" { target
> vect_load_lanes } } } */
>
>
>
--
Richard Biener <[email protected]>
SUSE Software Solutions Germany GmbH,
Frankenstrasse 146, 90461 Nuernberg, Germany;
GF: Ivo Totev, Andrew McDonald, Werner Knoblich; (HRB 36809, AG Nuernberg)
