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From: Richard Sandiford <richard.sandiford@arm.com>
To: Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>
Mail-Followup-To: Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org>,Richard Biener <rguenther@suse.de>,  gcc Patches <gcc-patches@gcc.gnu.org>, richard.sandiford@arm.com
Cc: Richard Biener <rguenther@suse.de>,  gcc Patches <gcc-patches@gcc.gnu.org>
Subject: Re: [aarch64] Use dup and zip1 for interleaving elements in initializing vector
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Date: Thu, 11 May 2023 20:07:45 +0100
In-Reply-To: <CAAgBjMm2Fn5THbXFHudD--M7QzZYXDv=qi1XMRxZHm-tHFTRWA@mail.gmail.com>
	(Prathamesh Kulkarni's message of "Thu, 4 May 2023 17:17:31 +0530")
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Prathamesh Kulkarni <prathamesh.kulkarni@linaro.org> writes:
> diff --git a/gcc/testsuite/gcc.target/aarch64/vec-init-18.c b/gcc/testsuite/gcc.target/aarch64/vec-init-18.c
> new file mode 100644
> index 00000000000..598a51f17c6
> --- /dev/null
> +++ b/gcc/testsuite/gcc.target/aarch64/vec-init-18.c
> @@ -0,0 +1,20 @@
> +/* { dg-do compile } */
> +/* { dg-options "-O3" } */
> +
> +#include <arm_neon.h>
> +
> +int16x8_t foo(int16_t x, int y)
> +{
> +  int16x8_t v = (int16x8_t) {x, y, x, y, x, y, x, y}; 
> +  return v;
> +}
> +
> +int16x8_t foo2(int16_t x) 
> +{
> +  int16x8_t v = (int16x8_t) {x, 1, x, 1, x, 1, x, 1}; 
> +  return v;
> +}
> +
> +/* { dg-final { scan-assembler-times {\tdup\tv[0-9]+\.4h, w[0-9]+} 3 } } */
> +/* { dg-final { scan-assembler {\tmovi\tv[0-9]+\.4h, 0x1} } } */
> +/* { dg-final { scan-assembler {\tzip1\tv[0-9]+\.8h, v[0-9]+\.8h, v[0-9]+\.8h} } } */

Would be good to make this a scan-assembler-times ... 2.

OK with that change.  Thanks for doing this.

Richard