if d.ctxt.Debugvlog > 1 {
			d.ctxt.Logf("deadcode start dynexp: %s<%d>\n", d.ldr.SymName(s), d.ldr.SymVersion(s))
		}
		d.mark(s, 0)
	}

	d.mapinitnoop = d.ldr.Lookup("runtime.mapinitnoop", abiInternalVer)
	if d.mapinitnoop == 0 {
		panic("could not look up runtime.mapinitnoop")
	}
	if d.ctxt.mainInittasks != 0 {
		d.mark(d.ctxt.mainInittasks, 0)
	}
}

func (d *deadcodePass) flood() {
	var methods []methodref