Re: [PATCH V2] test: Fix FAIL of pr97428.c for RVV

[Richard Biener <rguenther@suse.de>]

On Tue, 7 Nov 2023, Juzhe-Zhong wrote:

> This test shows vectorizing stmts using SLP 4 times instead of 2 for RVV.
> The reason is RVV has 512 bit vector.
> Here is comparison between RVV ans ARM SVE:
> https://godbolt.org/z/xc5KE5rPs
> 
> Confirm GCN also matches 4 SLP. This patch is passed on both GCN and RVV.
> 
> Ok for trunk ?

Does --param vect-epilogues-nomask=0 help?

> gcc/testsuite/ChangeLog:
> 
> 	* gcc.dg/vect/pr97428.c: Adapt for RVV and GCN.
> 
> ---
>  gcc/testsuite/gcc.dg/vect/pr97428.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/gcc/testsuite/gcc.dg/vect/pr97428.c b/gcc/testsuite/gcc.dg/vect/pr97428.c
> index ad6416096aa..f77adb1be97 100644
> --- a/gcc/testsuite/gcc.dg/vect/pr97428.c
> +++ b/gcc/testsuite/gcc.dg/vect/pr97428.c
> @@ -43,5 +43,6 @@ void foo_i2(dcmlx4_t dst[], const dcmlx_t src[], int n)
>  /* { dg-final { scan-tree-dump "Detected interleaving store of size 16" "vect" } } */
>  /* We're not able to peel & apply re-aligning to make accesses well-aligned for !vect_hw_misalign,
>     but we could by peeling the stores for alignment and applying re-aligning loads.  */
> -/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 2 "vect" { xfail { ! vect_hw_misalign } } } } */
> +/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 2 "vect" { target { { vect_hw_misalign } && { ! vect512 } } } } } */
> +/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 4 "vect" { target { vect512 } } } } */
>  /* { dg-final { scan-tree-dump-not "gap of 6 elements" "vect" } } */
> 

-- 
Richard Biener <rguenther@suse.de>
SUSE Software Solutions Germany GmbH,
Frankenstrasse 146, 90461 Nuernberg, Germany;
GF: Ivo Totev, Andrew McDonald, Werner Knoblich; (HRB 36809, AG Nuernberg)