Re: [PATCH] ARC: bpf_jit_arcv2: Remove redundant condition check

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Hi Vadim , Shahab

Thanks for the feedback 

> > The original code is obviously optimized out, but the intention, I
> > believe, was to check if the jump is conditional or not.
> > So the proper fix should change the code to check cond:
> >
> > - if (ARC_CC_AL)
> > + if (cond == ARC_CC_AL)

Okay 

> That is absolutely correct. If a new patch is not submitted soon
> I'll try to fix it myself.

if you are okay with that then I can proceed by submitting version 2
of the patch with the proposed changes included 

Best Regards,
Hardev
________________________________________
From: Shahab Vahedi <list+bpf@xxxxxxxxxx>
Sent: Wednesday, November 13, 2024 7:41 AM
To: Vadim Fedorenko <vadim.fedorenko@xxxxxxxxx>; Hardevsinh Palaniya <hardevsinh.palaniya@xxxxxxxxxxxxxxxxx>; ast@xxxxxxxxxx <ast@xxxxxxxxxx>; andrii@xxxxxxxxxx <andrii@xxxxxxxxxx>
Cc: Daniel Borkmann <daniel@xxxxxxxxxxxxx>; Martin KaFai Lau <martin.lau@xxxxxxxxx>; Eduard Zingerman <eddyz87@xxxxxxxxx>; Song Liu <song@xxxxxxxxxx>; Yonghong Song <yonghong.song@xxxxxxxxx>; John Fastabend <john.fastabend@xxxxxxxxx>; KP Singh <kpsingh@xxxxxxxxxx>; Stanislav Fomichev <sdf@xxxxxxxxxxx>; Hao Luo <haoluo@xxxxxxxxxx>; Jiri Olsa <jolsa@xxxxxxxxxx>; Vineet Gupta <vgupta@xxxxxxxxxx>; bpf@xxxxxxxxxxxxxxx <bpf@xxxxxxxxxxxxxxx>; linux-snps-arc@xxxxxxxxxxxxxxxxxxx <linux-snps-arc@xxxxxxxxxxxxxxxxxxx>; linux-kernel@xxxxxxxxxxxxxxx <linux-kernel@xxxxxxxxxxxxxxx>
Subject: Re: [PATCH] ARC: bpf_jit_arcv2: Remove redundant condition check
 
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Vadim Fedorenko wrote:

> The original code is obviously optimized out, but the intention, I
> believe, was to check if the jump is conditional or not.
> So the proper fix should change the code to check cond:
>
> - if (ARC_CC_AL)
> + if (cond == ARC_CC_AL)

That is absolutely correct. If a new patch is not submitted soon
I'll try to fix it myself.

Cheers,
Shahab




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