Hi Yury,
> -----Original Message-----
> From: Yury Khrustalev <yury.khrusta...@arm.com>
> Sent: Wednesday, July 23, 2025 9:45 AM
> To: gcc-patches@gcc.gnu.org
> Cc: Andrew Pinski <pins...@gmail.com>; Richard Sandiford
> <richard.sandif...@arm.com>; Tamar Christina <tamar.christ...@arm.com>;
> Alfie Richards <alfie.richa...@arm.com>; Alice Carlotti
> <alice.carlo...@arm.com>;
> Victor Do Nascimento <victor.donascime...@arm.com>
> Subject: [PATCH v2 3/3] testsuite: Add runtime test for FMV resolvers
>
> gcc/testsuite/ChangeLog:
>
> * g++.target/aarch64/mv-cpu-features.C: new test.
This looks OK to me.
Thanks,
Tamar
> ---
> .../g++.target/aarch64/mv-cpu-features.C | 65 +++++++++++++++++++
> 1 file changed, 65 insertions(+)
> create mode 100644 gcc/testsuite/g++.target/aarch64/mv-cpu-features.C
>
> diff --git a/gcc/testsuite/g++.target/aarch64/mv-cpu-features.C
> b/gcc/testsuite/g++.target/aarch64/mv-cpu-features.C
> new file mode 100644
> index 00000000000..00a0cf1ecc4
> --- /dev/null
> +++ b/gcc/testsuite/g++.target/aarch64/mv-cpu-features.C
> @@ -0,0 +1,65 @@
> +/* { dg-do run } */
> +/* { dg-require-ifunc "" } */
> +/* { dg-options "-Wno-experimental-fmv-target" } */
> +
> +#include <cstdint>
> +#include <sys/auxv.h>
> +
> +__attribute__((target_version ("default")))
> +int foo ()
> +{
> + return 0;
> +}
> +
> +__attribute__((target_version ("rng")))
> +int foo ()
> +{
> + return 1;
> +}
> +
> +__attribute__((target_version ("lse")))
> +int foo ()
> +{
> + return 2;
> +}
> +
> +typedef struct {
> + uint64_t size;
> + uint64_t hwcap;
> + uint64_t hwcap2;
> + uint64_t hwcap3;
> + uint64_t hwcap4;
> +} ifunc_arg_t;
> +
> +int impl ()
> +{
> + return 0;
> +}
> +
> +#ifndef _IFUNC_ARG_HWCAP
> +#define _IFUNC_ARG_HWCAP (1ULL << 62)
> +#endif
> +
> +extern "C" void
> +__init_cpu_features_resolver (unsigned long hwcap, const ifunc_arg_t *arg);
> +
> +extern "C" void *
> +fun_resolver (uint64_t a0, const ifunc_arg_t *a1)
> +{
> + ifunc_arg_t arg = {};
> + arg.size = sizeof (ifunc_arg_t);
> + arg.hwcap = HWCAP_ATOMICS;
> + arg.hwcap2 = HWCAP2_RNG;
> + __init_cpu_features_resolver (arg.hwcap | _IFUNC_ARG_HWCAP, &arg);
> + return (void *)(uintptr_t)impl;
> +}
> +
> +extern "C" int fun (void) __attribute__((ifunc ("fun_resolver")));
> +
> +int main ()
> +{
> + int res = fun ();
> + if (res == 0 && foo () == 2)
> + return 0;
> + return 1;
> +}
> --
> 2.39.5
