提交 29fe46ef 编写于 作者: J Jiong Wang 提交者: Daniel Borkmann

nfp: bpf: don't do ld/shifts combination if shifts are jump destination

If any of the shift insns in the ld/shift sequence is jump destination,
don't do combination.
Signed-off-by: NJiong Wang <jiong.wang@netronome.com>
Reviewed-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDaniel Borkmann <daniel@iogearbox.net>
上级 1266f5d6
......@@ -2181,6 +2181,10 @@ static void nfp_bpf_opt_ld_shift(struct nfp_prog *nfp_prog)
if (next1.imm != 0x20 || next2.imm != 0x20)
continue;
if (meta2->flags & FLAG_INSN_IS_JUMP_DST ||
meta3->flags & FLAG_INSN_IS_JUMP_DST)
continue;
meta2->skip = true;
meta3->skip = true;
}
......
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