Commit 6e774845 authored Dec 19, 2018 by Jakub Kicinski Committed by Daniel Borkmann Dec 20, 2018

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>

parent 9b38c405

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

+0 −5

Original line number	Diff line number	Diff line
		@@ -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(),