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nfp: bpf: don't do ld/mask combination if mask is jump destination 

If the mask insn in the ld/mask pair is jump destination, then don't do
combination.

Signed-off-by: Jiong Wang <jiong.wang@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jiong Wang 2017-11-30 21:32:52 -08:00 committed by Daniel Borkmann
parent a09d5c52c4
commit 1266f5d655
1 changed files with 3 additions and 0 deletions
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3
drivers/net/ethernet/netronome/nfp/bpf/jit.c
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@ -2142,6 +2142,9 @@ static void nfp_bpf_opt_ld_mask(struct nfp_prog *nfp_prog)
if (next.src_reg || next.dst_reg)
continue;
if (meta2->flags & FLAG_INSN_IS_JUMP_DST)
continue;
meta2->skip = true;
}
}