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