>> That's probably because we have vect_variable_length && vect128 instead?
Yes. Both RVV and SVE uses 128bit vector SLP.
The optimized IR (both ARM SVE and RVV are similiar):
vect__1.5_189 = MEM <vector(4) int> [(int *)x_50(D)];
vect__1.6_191 = MEM <vector(4) int> [(int *)x_50(D) + 16B];
mask__2.7_192 = vect__1.5_189 == { 1, 1, 1, 1 };
mask__2.7_193 = vect__1.6_191 == { 1, 1, 1, 1 };
mask_patt_156.8_194 = VEC_PACK_TRUNC_EXPR <mask__2.7_192, mask__2.7_193>;
vect__3.11_196 = MEM <vector(8) short int> [(short int *)y_51(D)];
mask__4.12_197 = vect__3.11_196 == { 2, 2, 2, 2, 2, 2, 2, 2 };
mask_patt_157.13_198 = mask_patt_156.8_194 & mask__4.12_197;
vect_patt_158.14_199 = .VCOND_MASK (mask_patt_157.13_198, { 1, 1, 1, 1, 1, 1,
1, 1 }, { 0, 0, 0, 0, 0, 0, 0, 0 });
vect_patt_159.15_200 = [vec_unpack_lo_expr] vect_patt_158.14_199;
vect_patt_159.15_201 = [vec_unpack_hi_expr] vect_patt_158.14_199;
juzhe.zh...@rivai.ai
From: Richard Biener
Date: 2024-01-16 15:38
To: Juzhe-Zhong
CC: gcc-patches; Tamar.Christina
Subject: Re: [PATCH] test regression fix: Remove xfail for variable length
targets
On Tue, 16 Jan 2024, Juzhe-Zhong wrote:
> Recently notice there is a XPASS in RISC-V:
> XPASS: gcc.dg/vect/bb-slp-43.c -flto -ffat-lto-objects scan-tree-dump-not
> slp2 "vector operands from scalars"
> XPASS: gcc.dg/vect/bb-slp-43.c scan-tree-dump-not slp2 "vector operands from
> scalars"
>
> And checked both ARM SVE and RVV:
>
> https://godbolt.org/z/T9cPa7fh3
>
> both has the same dump slp2. So I guess ARM SVE has the same XPASS in this
> test.
That's probably because we have vect_variable_length && vect128 instead?
Thus, what's the IL after SLP2 (and some DCE)?
> gcc/testsuite/ChangeLog:
>
> * gcc.dg/vect/bb-slp-43.c: Remove xfail for variable length.
>
> ---
> gcc/testsuite/gcc.dg/vect/bb-slp-43.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/gcc/testsuite/gcc.dg/vect/bb-slp-43.c
> b/gcc/testsuite/gcc.dg/vect/bb-slp-43.c
> index dad2d24262d..40bd2e0dfbf 100644
> --- a/gcc/testsuite/gcc.dg/vect/bb-slp-43.c
> +++ b/gcc/testsuite/gcc.dg/vect/bb-slp-43.c
> @@ -14,4 +14,4 @@ f (int *restrict x, short *restrict y)
> }
>
> /* { dg-final { scan-tree-dump-not "mixed mask and nonmask" "slp2" } } */
> -/* { dg-final { scan-tree-dump-not "vector operands from scalars" "slp2" {
> target { { vect_int && vect_bool_cmp } && { vect_unpack && vect_hw_misalign }
> } xfail { vect_variable_length && { ! vect256 } } } } } */
> +/* { dg-final { scan-tree-dump-not "vector operands from scalars" "slp2" {
> target { { vect_int && vect_bool_cmp } && { vect_unpack && vect_hw_misalign }
> } } } } */
>
--
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)
