Re: [gcc13 backport 12/12] riscv: fix error: control reaches end of non-void function

[Kito Cheng via Gcc-patches]

OK for backport :)

On Wed, Jul 26, 2023 at 2:11 AM Patrick O'Neill <patr...@rivosinc.com> wrote:
>
> From: Martin Liska <mli...@suse.cz>
>
> Fixes:
> gcc/config/riscv/sync.md:66:1: error: control reaches end of non-void 
> function [-Werror=return-type]
> 66 |   [(set (attr "length") (const_int 4))])
>    | ^
>
>         PR target/109713
>
> gcc/ChangeLog:
>
>         * config/riscv/sync.md: Add gcc_unreachable to a switch.
> ---
>  gcc/config/riscv/sync.md | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/gcc/config/riscv/sync.md b/gcc/config/riscv/sync.md
> index 6e7c762ac57..9fc626267de 100644
> --- a/gcc/config/riscv/sync.md
> +++ b/gcc/config/riscv/sync.md
> @@ -62,6 +62,8 @@
>         return "fence\tr,rw";
>      else if (model == MEMMODEL_RELEASE)
>         return "fence\trw,w";
> +    else
> +       gcc_unreachable ();
>    }
>    [(set (attr "length") (const_int 4))])
>
> --
> 2.34.1
>