[PATCH] RISC-V: Refactor the or pattern to switch cases

[Kito Cheng]

OK, thanks :)

On Sun, May 14, 2023 at 4:22 PM Pan Li via Gcc-patches
<gcc-patches@gcc.gnu.org> wrote:
>
> From: Pan Li <pan2.li@intel.com>
>
> This patch refactor the pattern A or B or C or D, to the switch case for
> easy add/remove new types, as well as human reading friendly.
>
> Before this patch:
> return A || B || C || D;
>
> After this patch:
> switch (type)
>   {
>     case A:
>     case B:
>     case C:
>     case D:
>       return true;
>     default:
>       return false;
>   }
>
> Signed-off-by: Pan Li <pan2.li@intel.com>
>
> gcc/ChangeLog:
>
>         * config/riscv/riscv-vector-builtins.cc (required_extensions_p):
>         Refactor the or pattern to switch cases.
> ---
>  gcc/config/riscv/riscv-vector-builtins.cc | 37 ++++++++++++++++-------
>  1 file changed, 26 insertions(+), 11 deletions(-)
>
> diff --git a/gcc/config/riscv/riscv-vector-builtins.cc b/gcc/config/riscv/riscv-vector-builtins.cc
> index 4117897c6c9..0f56f29f7aa 100644
> --- a/gcc/config/riscv/riscv-vector-builtins.cc
> +++ b/gcc/config/riscv/riscv-vector-builtins.cc
> @@ -2606,17 +2606,32 @@ register_vector_type (vector_type_index type)
>  static bool
>  required_extensions_p (enum rvv_base_type type)
>  {
> -  return type == RVV_BASE_eew8_index || type == RVV_BASE_eew16_index
> -        || type == RVV_BASE_eew32_index || type == RVV_BASE_eew64_index
> -        || type == RVV_BASE_float_vector
> -        || type == RVV_BASE_double_trunc_float_vector
> -        || type == RVV_BASE_double_trunc_vector
> -        || type == RVV_BASE_widen_lmul1_vector
> -        || type == RVV_BASE_eew8_interpret || type == RVV_BASE_eew16_interpret
> -        || type == RVV_BASE_eew32_interpret || type == RVV_BASE_eew64_interpret
> -        || type == RVV_BASE_vlmul_ext_x2 || type == RVV_BASE_vlmul_ext_x4
> -        || type == RVV_BASE_vlmul_ext_x8 || type == RVV_BASE_vlmul_ext_x16
> -        || type == RVV_BASE_vlmul_ext_x32 || type == RVV_BASE_vlmul_ext_x64;
> +  switch (type)
> +    {
> +      case RVV_BASE_eew8_index:
> +      case RVV_BASE_eew16_index:
> +      case RVV_BASE_eew32_index:
> +      case RVV_BASE_eew64_index:
> +      case RVV_BASE_float_vector:
> +      case RVV_BASE_double_trunc_float_vector:
> +      case RVV_BASE_double_trunc_vector:
> +      case RVV_BASE_widen_lmul1_vector:
> +      case RVV_BASE_eew8_interpret:
> +      case RVV_BASE_eew16_interpret:
> +      case RVV_BASE_eew32_interpret:
> +      case RVV_BASE_eew64_interpret:
> +      case RVV_BASE_vlmul_ext_x2:
> +      case RVV_BASE_vlmul_ext_x4:
> +      case RVV_BASE_vlmul_ext_x8:
> +      case RVV_BASE_vlmul_ext_x16:
> +      case RVV_BASE_vlmul_ext_x32:
> +      case RVV_BASE_vlmul_ext_x64:
> +       return true;
> +      default:
> +       return false;
> +    }
> +
> +  gcc_unreachable ();
>  }
>
>  static uint64_t
> --
> 2.34.1
>