Re: [oss-drivers] netronome/nfp/bpf/jit.c cannot be build with -O3

[Oleksandr Natalenko <oleksandr@xxxxxxxxxxxxxx>]

Hi.

On 07.05.2019 00:01, Jiong Wang wrote:
> I guess it's because constant prop. Could you try the following change 
> to
> __emit_shift?
>
> drivers/net/ethernet/netronome/nfp/bpf/jit.c
> __emit_shift:331
> -       if (sc == SHF_SC_L_SHF)
> +       if (sc == SHF_SC_L_SHF && shift)
>                 shift = 32 - shift;
>
> emit_shf_indir is passing "0" as shift to __emit_shift which will
> eventually be turned into 32 and it was OK because we truncate to 
> 5-bit,
> but before truncation, it will overflow the shift mask.

Yup, it silences the error for me.

--
  Oleksandr Natalenko (post-factum)