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nfp: bpf: remove the trivial JSET optimization 

The verifier will now understand the JSET instruction, so don't
mark the dead branch in the JIT as noop.  We won't generate any
code, anyway.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: Quentin Monnet <quentin.monnet@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Jakub Kicinski 2018-12-19 22:13:07 -08:00 committed by Daniel Borkmann
parent 9b38c4056b
commit 6e774845b3
1 changed files with 0 additions and 5 deletions
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5
drivers/net/ethernet/netronome/nfp/bpf/jit.c
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@ -3054,11 +3054,6 @@ static int jset_imm(struct nfp_prog *nfp_prog, struct nfp_insn_meta *meta)
u64 imm = insn->imm; /* sign extend */
swreg tmp_reg;
if (!imm) {
meta->skip = true;
return 0;
}
if (imm & ~0U) {
tmp_reg = ur_load_imm_any(nfp_prog, imm & ~0U, imm_b(nfp_prog));
emit_alu(nfp_prog, reg_none(),