Re: [aarch64] Use dup and zip1 for interleaving elements in initializing vector

[Richard Sandiford <richard.sandiford@arm.com>]

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