}

	// New symbols should not initially be reachable.
	if ldr.AttrReachable(es1) || ldr.AttrReachable(es2) || ldr.AttrReachable(es3) {
		t.Errorf("newly materialized symbols should not be reachable")
	}

	// ... however it should be possible to set/unset their reachability.
	ldr.SetAttrReachable(es3, true)
	if !ldr.AttrReachable(es3) {
		t.Errorf("expected reachable symbol after update")
	}

					// its child types with UsedInIface set. (See also the
					// comment below.)
					rs := r.Sym()
					if !d.ldr.AttrUsedInIface(rs) {
						d.ldr.SetAttrUsedInIface(rs, true)
						if d.ldr.AttrReachable(rs) {
							d.ldr.SetAttrReachable(rs, false)
							d.mark(rs, symIdx)
						}
					}
				}
				i += 2
				continue
			case objabi.R_USETYPE:

	return int64(r.Sym(li).Siz())
}

// AttrReachable returns true for symbols that are transitively
// referenced from the entry points. Unreachable symbols are not
// written to the output.
func (l *Loader) AttrReachable(i Sym) bool {
	return l.attrReachable.Has(i)
}

// SetAttrReachable sets the reachability property for a symbol (see
// AttrReachable).
func (l *Loader) SetAttrReachable(i Sym, v bool) {
	if v {

		return
	}
	ldr := ctxt.loader

	for i, s := range syms {
		if !ldr.AttrReachable(s) {
			continue
		}
		if uint64(ldr.SymValue(s)) >= sect.Vaddr {
			syms = syms[i:]
			break
		}
	}

	eaddr := sect.Vaddr + sect.Length
	for _, s := range syms {
		if !ldr.AttrReachable(s) {
			continue
		}
		if ldr.SymValue(s) >= int64(eaddr) {
			break
		}

			o = ldr.SymValue(rs) + r.Add() - int64(ldr.SymSect(rs).Vaddr)
		case objabi.R_METHODOFF:
			if !ldr.AttrReachable(rs) {
				// Set it to a sentinel value. The runtime knows this is not pointing to
				// anything valid.
				o = -1
				break
			}
			fallthrough
		case objabi.R_ADDROFF:
			if weak && !ldr.AttrReachable(rs) {
				continue
			}
			sect := ldr.SymSect(rs)
			if sect == nil {

	if s := ldr.Lookup("runtime.duffcopy", sym.SymVerABIInternal); s != 0 && ldr.AttrReachable(s) {
		addLabelSyms(s, 8, 8*64)
	}
	if s := ldr.Lookup("runtime.duffzero", sym.SymVerABIInternal); s != 0 && ldr.AttrReachable(s) {
		addLabelSyms(s, 4, 4*64)
	}

	if ctxt.IsDarwin() {
		big := false
		for _, seg := range ld.Segments {

		return
	}

	ldr := ctxt.loader
	for i, s := range syms {
		if !ldr.AttrReachable(s) {
			panic("should never happen")
		}
		if uint64(ldr.SymValue(s)) >= sect.Vaddr {
			syms = syms[i:]
			break
		}
	}

	eaddr := sect.Vaddr + sect.Length
	for _, s := range syms {
		if !ldr.AttrReachable(s) {
			continue
		}
		if ldr.SymValue(s) >= int64(eaddr) {
			break
		}

		die = d.newdie(&dwtypes, dwarf.DW_ABRV_TYPEDECL, name)
		d.newrefattr(die, dwarf.DW_AT_type, d.mustFind("<unspecified>"))
	}

	newattr(die, dwarf.DW_AT_go_kind, dwarf.DW_CLS_CONSTANT, int64(kind), 0)

	if d.ldr.AttrReachable(gotype) {
		newattr(die, dwarf.DW_AT_go_runtime_type, dwarf.DW_CLS_GO_TYPEREF, 0, dwSym(gotype))
	}

	// Sanity check.
	if _, ok := d.rtmap[gotype]; ok {

	// them to a go version of these functions in runtime/asm_ppc64x.s
	ts := ldr.LookupOrCreateSym("runtime.elf_"+s[1], 0)
	r.SetSym(ts)
	r.SetAdd(int64((n - minReg) * offMul))
	firstUse = !ldr.AttrReachable(ts)
	if firstUse {
		// This function only becomes reachable now. It has been dropped from
		// the text section (it was unreachable until now), it needs included.
		ldr.SetAttrReachable(ts, true)
	}

		// runtime.MemProfile is not retained in the binary after
		// deadcode (and we're not dynamically linking).
		memProfile := ctxt.loader.Lookup("runtime.MemProfile", abiInternalVer)
		if memProfile != 0 && !ctxt.loader.AttrReachable(memProfile) && !ctxt.DynlinkingGo() {
			memProfSym := ctxt.loader.LookupOrCreateSym("runtime.disableMemoryProfiling", 0)
			sb := ctxt.loader.MakeSymbolUpdater(memProfSym)
			sb.SetType(sym.SDATA)
			sb.SetSize(0)