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

[Andrew Stubbs <ams@codesourcery.com>]

On 07/11/2023 07:44, 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
> 
> But I notice AMDGCN also has 512 bit vector, seems this patch will cause FAIL in GCN ?
> 
> Not sure whether GCN is 2 times or 4 times ?

The pattern matches 4 times on GCN.

> gcc/testsuite/ChangeLog:
> 
> 	* gcc.dg/vect/pr97428.c: Fix FAIL for RVV.
> 
> ---
>   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..352c9bf04a7 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" { xfail { { ! vect_hw_misalign } || { vect512 } } } } } */
> +/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 4 "vect" { xfail { { ! vect_hw_misalign } || { ! vect512 } } } } } */
>   /* { dg-final { scan-tree-dump-not "gap of 6 elements" "vect" } } */