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

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

[Juzhe-Zhong]

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 ?

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" } } */
-- 
2.36.3

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

[Richard Biener]

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)

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

[钟居哲]

[-- Attachment #1: Type: text/plain, Size: 2140 bytes --]

Yes! Thanks a lot.

Fix as you suggested in V3:
https://gcc.gnu.org/pipermail/gcc-patches/2023-November/635591.html 




juzhe.zhong@rivai.ai
 
From: Richard Biener
Date: 2023-11-07 21:50
To: Juzhe-Zhong
CC: gcc-patches; jeffreyalaw
Subject: Re: [PATCH V2] test: Fix FAIL of pr97428.c for RVV
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)