Re: [PATCH] testsuite: Gate vec-narrow-1.C on capable vector targets

On Mon, Aug 10, 2026 at 2:11 PM <[email protected]> wrote:
>
> From: Kyrylo Tkachov <[email protected]>
>
> I messed up with the effective targets on this test twice, would appreciate
> some direction on how to fix this up properly.
> The test needs V2SImode vectors effectively. They come by default on aarch64,
> but on arm they require Neon, and on x86 they required x86_64 and AVX512
>
> In this patch I've restricted it to just aarch64, arm, and x86 and peppered it
> with the required effective targets and add-options.
> This seems to work for arm, aarch64, and x86.
> Is this okay to apply?
> Thanks,
> Kyrill
>
> gcc/testsuite/ChangeLog:
>
>         * g++.dg/tree-ssa/vec-narrow-1.C: Require a capable vector
>         target and option set.
>
> Signed-off-by: Kyrylo Tkachov <[email protected]>
> ---
>  gcc/testsuite/g++.dg/tree-ssa/vec-narrow-1.C | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
> diff --git a/gcc/testsuite/g++.dg/tree-ssa/vec-narrow-1.C b/gcc/testsuite/g++.dg/tree-ssa/vec-narrow-1.C
> index cec5b0ba345..a1925b41b4a 100644
> --- a/gcc/testsuite/g++.dg/tree-ssa/vec-narrow-1.C
> +++ b/gcc/testsuite/g++.dg/tree-ssa/vec-narrow-1.C
> @@ -1,5 +1,8 @@
> -// { dg-do compile }
> +// { dg-do compile { target { aarch64*-*-* arm*-*-* i?86-*-* x86_64-*-* } } }
> +// { dg-require-effective-target arm_neon_ok { target arm*-*-* } }
> +// { dg-require-effective-target lp64 { target { i?86-*-* x86_64-*-* } } }

Why does it only work with LP64?

>  // { dg-options "-O2 -fdump-tree-optimized" }
> +// { dg-add-options arm_neon }
>  // { dg-additional-options "-mavx512vl -mavx512dq" { target { i?86-*-* x86_64-*-* } } }
>  // Extension is monotone, so it commutes with the comparison and the outer
>  // truncation is exact.  The argument is lanewise, so a widened vector
> --
> 2.50.1 (Apple Git-155)
>


-- 
H.J.