Commit 29fe46ef authored by Jiong Wang's avatar Jiong Wang Committed by Daniel Borkmann
Browse files

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: default avatarJiong Wang <jiong.wang@netronome.com>
Reviewed-by: default avatarJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: default avatarDaniel Borkmann <daniel@iogearbox.net>
parent 1266f5d6

drivers/net/ethernet/netronome/nfp/bpf/jit.c

+4 −0
Original line number Diff line number Diff line
@@ -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;

	}