RE: [PATCH] test: Isolate slp-1.c check of target supports vect_strided5

["Li, Pan2" <pan2.li@intel.com>]

Committed, thanks Richard.

Pan

-----Original Message-----
From: Gcc-patches <gcc-patches-bounces+pan2.li=intel.com@gcc.gnu.org> On Behalf Of Richard Biener via Gcc-patches
Sent: Friday, September 15, 2023 5:38 PM
To: Juzhe-Zhong <juzhe.zhong@rivai.ai>
Cc: gcc-patches@gcc.gnu.org; jeffreyalaw@gmail.com; richard.sandiford@arm.com
Subject: Re: [PATCH] test: Isolate slp-1.c check of target supports vect_strided5

On Fri, 15 Sep 2023, Juzhe-Zhong wrote:

> This test failed in RISC-V:
> FAIL: gcc.dg/vect/slp-1.c -flto -ffat-lto-objects  scan-tree-dump-times vect "vectorizing stmts using SLP" 4
> FAIL: gcc.dg/vect/slp-1.c scan-tree-dump-times vect "vectorizing stmts using SLP" 4
> 
> Because this loop:
>   /* SLP with unrolling by 8.  */
>   for (i = 0; i < N; i++)
>     {
>       out[i*5] = 8;
>       out[i*5 + 1] = 7;
>       out[i*5 + 2] = 81;
>       out[i*5 + 3] = 28;
>       out[i*5 + 4] = 18;
>     }
> 
> is using vect_load_lanes with array size = 5.
> instead of SLP.
> 
> When we adjust the COST of LANES load store, then it will use SLP.

OK.

> gcc/testsuite/ChangeLog:
> 
> 	* gcc.dg/vect/slp-1.c: Add vect_stried5.
> 
> ---
>  gcc/testsuite/gcc.dg/vect/slp-1.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/gcc/testsuite/gcc.dg/vect/slp-1.c b/gcc/testsuite/gcc.dg/vect/slp-1.c
> index 82e4f6469fb..d4a13f12df6 100644
> --- a/gcc/testsuite/gcc.dg/vect/slp-1.c
> +++ b/gcc/testsuite/gcc.dg/vect/slp-1.c
> @@ -122,5 +122,5 @@ int main (void)
>  }
>  
>  /* { dg-final { scan-tree-dump-times "vectorized 4 loops" 1 "vect"  } } */
> -/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 4 "vect" } } */
> -  
> +/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 4 "vect" { target {! vect_strided5 } } } } */
> +/* { dg-final { scan-tree-dump-times "vectorizing stmts using SLP" 3 "vect" { target vect_strided5 } } } */
> 

-- 
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)