netdev - Re: netronome/nfp/bpf/jit.c cannot be build with -O3

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Message-ID: <2a3761669e4ec13847205d30384c0a17@natalenko.name>
Date:   Mon, 06 May 2019 23:24:39 +0200
From:   Oleksandr Natalenko <oleksandr@...alenko.name>
To:     Jakub Kicinski <jakub.kicinski@...ronome.com>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <kafai@...com>,
        Song Liu <songliubraving@...com>, Yonghong Song <yhs@...com>,
        Jesper Dangaard Brouer <hawk@...nel.org>,
        John Fastabend <john.fastabend@...il.com>,
        netdev@...r.kernel.org, bpf@...r.kernel.org,
        oss-drivers@...ronome.com, linux-kernel@...r.kernel.org,
        xdp-newbies@...r.kernel.org, valdis@...edu
Subject: Re: netronome/nfp/bpf/jit.c cannot be build with -O3

Hi.

On 06.05.2019 23:00, Jakub Kicinski wrote:
> Any chance you could try different compiler versions?  The code in
> question does not look too unusual.  Could you try if removing
> FIELD_FIT() on line 326 makes a difference?

If building with gcc from CentOS 7:

gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-36)

the issue is not reproducible.

Also, commenting out the whole "if" block with FIELD_FIT() prevents the 
issue from occurring too.

-- 
   Oleksandr Natalenko (post-factum)