Re: [PATCH] RISC-V: Fix a mistake in previous patch.

[Kito Cheng <kito.cheng@gmail.com>]

Committed with title tweak, thanks

On Tue, Oct 25, 2022 at 9:53 PM <juzhe.zhong@rivai.ai> wrote:
>
> From: Ju-Zhe Zhong <juzhe.zhong@rivai.ai>
>
>  I noticed that I have made a mistake in previous patch:
>  https://patchwork.sourceware.org/project/gcc/patch/20220817071950.271762-1-juzhe.zhong@rivai.ai/
>
>  The previous statement before this patch:
>  bool need_barrier_p = (get_frame_size () + cfun->machine->frame.arg_pointer_offset) != 0;
>
>  However, I changed it in the previous patch:
>  bool need_barrier_p = known_ne (get_frame_size (), cfun->machine->frame.arg_pointer_offset);
>  This is incorrect.
>
>  Now, I correct this statement in this patch.
>
> gcc/ChangeLog:
>
>         * config/riscv/riscv.cc (riscv_expand_epilogue): Fix statement.
>
> ---
>  gcc/config/riscv/riscv.cc | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/gcc/config/riscv/riscv.cc b/gcc/config/riscv/riscv.cc
> index 08354a19c05..50ef38438a2 100644
> --- a/gcc/config/riscv/riscv.cc
> +++ b/gcc/config/riscv/riscv.cc
> @@ -5028,8 +5028,8 @@ riscv_expand_epilogue (int style)
>    rtx insn;
>
>    /* We need to add memory barrier to prevent read from deallocated stack.  */
> -  bool need_barrier_p
> -    = known_ne (get_frame_size (), cfun->machine->frame.arg_pointer_offset);
> +  bool need_barrier_p = known_ne (get_frame_size ()
> +                                  + cfun->machine->frame.arg_pointer_offset, 0);
>
>    if (cfun->machine->naked_p)
>      {
> --
> 2.36.1
>