Re: [PATCH 41/46] tcg/optimize: Use fold_masks_zs in fold_xor

[Pierrick Bouvier]

On 12/10/24 07:23, Richard Henderson wrote:
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
>   tcg/optimize.c | 17 +++++++----------
>   1 file changed, 7 insertions(+), 10 deletions(-)
>
> diff --git a/tcg/optimize.c b/tcg/optimize.c
> index 46116970f3..fec46014be 100644
> --- a/tcg/optimize.c
> +++ b/tcg/optimize.c
> @@ -1093,11 +1093,6 @@ static bool fold_masks_z(OptContext *ctx, TCGOp *op, 
> uint64_t z_mask)
>       return fold_masks_zsa(ctx, op, z_mask, smask_from_zmask(z_mask), -1);
>   }
>   
> -static bool fold_masks(OptContext *ctx, TCGOp *op)
> -{
> -    return fold_masks_zsa(ctx, op, ctx->z_mask, ctx->s_mask, ctx->a_mask);
> -}
> -

Not so important, but eliminating this function could be done in its own 
commit.

>   /*
>    * Convert @op to NOT, if NOT is supported by the host.
>    * Return true f the conversion is successful, which will still
> @@ -2758,6 +2753,8 @@ static bool fold_tcg_st_memcopy(OptContext *ctx, TCGOp 
> *op)
>   
>   static bool fold_xor(OptContext *ctx, TCGOp *op)
>   {
> +    uint64_t z_mask, s_mask;
> +
>       if (fold_const2_commutative(ctx, op) ||
>           fold_xx_to_i(ctx, op, 0) ||
>           fold_xi_to_x(ctx, op, 0) ||
> @@ -2765,11 +2762,11 @@ static bool fold_xor(OptContext *ctx, TCGOp *op)
>           return true;
>       }
>   
> -    ctx->z_mask = arg_info(op->args[1])->z_mask
> -                | arg_info(op->args[2])->z_mask;
> -    ctx->s_mask = arg_info(op->args[1])->s_mask
> -                & arg_info(op->args[2])->s_mask;
> -    return fold_masks(ctx, op);
> +    z_mask = arg_info(op->args[1])->z_mask
> +           | arg_info(op->args[2])->z_mask;
> +    s_mask = arg_info(op->args[1])->s_mask
> +           & arg_info(op->args[2])->s_mask;
> +    return fold_masks_zs(ctx, op, z_mask, s_mask);
>   }
>   
>   static bool fold_bitsel_vec(OptContext *ctx, TCGOp *op)

Reviewed-by: Pierrick Bouvier <pierrick.bouvier@linaro.org>