merged into another commit,, thanks.

On Tue, Jan 10, 2023 at 6:51 AM <juzhe.zhong@rivai.ai> wrote:

> From: Ju-Zhe Zhong <juzhe.zhong@rivai.ai>
>
> gcc/ChangeLog:
>
>         * config/riscv/riscv-vsetvl.cc
> (pass_vsetvl::backward_demand_fusion): Add pre-check to avoid redundant
> flow.
>
> ---
>  gcc/config/riscv/riscv-vsetvl.cc | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/gcc/config/riscv/riscv-vsetvl.cc
> b/gcc/config/riscv/riscv-vsetvl.cc
> index 0ca1c51d121..a972c49561a 100644
> --- a/gcc/config/riscv/riscv-vsetvl.cc
> +++ b/gcc/config/riscv/riscv-vsetvl.cc
> @@ -2020,6 +2020,8 @@ pass_vsetvl::backward_demand_fusion (void)
>
>        if (!backward_propagate_worthwhile_p (cfg_bb, curr_block_info))
>         continue;
> +
> +      if (cfg_bb == EXIT_BLOCK_PTR_FOR_FN (cfun))
>         continue;
>
>        edge e;
> --
> 2.36.1
>
>