asanName := ir.NewNameAt(base.Pos, symL, types.Types[types.TSTRING])
	asanName.Class = ir.PEXTERN
	symL.Def = asanName
	typecheck.Target.Externs = append(typecheck.Target.Externs, asanName)

	symL = lname(".asanModulename")
	asanModulename := ir.NewNameAt(base.Pos, symL, types.Types[types.TSTRING])
	asanModulename.Class = ir.PEXTERN
	symL.Def = asanModulename
	typecheck.Target.Externs = append(typecheck.Target.Externs, asanModulename)

	importsym(fn.Nname)
}

// importvar declares symbol s as an imported variable with type t.
func importvar(s *types.Sym, t *types.Type) {
	n := ir.NewNameAt(src.NoXPos, s, t)
	n.Class = ir.PEXTERN
	importsym(n)
}

func importsym(name *ir.Name) {
	sym := name.Sym()
	if sym.Def != nil {
		base.Fatalf("importsym of symbol that already exists: %v", sym.Def)
	}
	sym.Def = name

	"cmd/internal/obj"
	"cmd/internal/objabi"
	"cmd/internal/src"
)

// InitAddrOffset writes the static name symbol lsym to n, it does not modify n.
// It's the caller responsibility to make sure lsym is from ONAME/PEXTERN node.
func InitAddrOffset(n *ir.Name, noff int64, lsym *obj.LSym, off int64) {
	if n.Op() != ir.ONAME {
		base.Fatalf("InitAddr n op %v", n.Op())
	}
	if n.Sym() == nil {
		base.Fatalf("InitAddr nil n sym")
	}

	if rn.Class == ir.PFUNC {
		// TODO if roff != 0 { panic }
		staticdata.InitAddr(l, loff, staticdata.FuncLinksym(rn))
		return true
	}
	if rn.Class != ir.PEXTERN || rn.Sym().Pkg != types.LocalPkg {
		return false
	}
	if rn.Defn == nil {
		// No explicit initialization value. Probably zeroed but perhaps
		// supplied externally and of unknown value.
		return false
	}

		fixedlit(ctxt, initKindDynamic, n, vstat, init)

		// copy static to slice
		var_ = typecheck.AssignExpr(var_)
		name, offset, ok := staticinit.StaticLoc(var_)
		if !ok || name.Class != ir.PEXTERN {
			base.Fatalf("slicelit: %v", var_)
		}
		staticdata.InitSlice(name, offset, vstat.Linksym(), t.NumElem())
		return
	}

	// recipe for var = []t{...}
	// 1. make a static array
	//	var vstat [...]t

		xe := ir.NewIndexExpr(base.Pos, staticuint64s, index)
		xe.SetBounded(true)
		value = xe
	case n.Op() == ir.ONAME && n.(*ir.Name).Class == ir.PEXTERN && n.(*ir.Name).Readonly():
		// n is a readonly global; use it directly.
		value = n
	case conv.Esc() == ir.EscNone && fromType.Size() <= 1024:
		// n does not escape. Use a stack temporary initialized to n.

	s.vars[ptrVar] = p
	s.vars[lenVar] = l
	s.vars[capVar] = c
	if inplace {
		if sn.Op() == ir.ONAME {
			sn := sn.(*ir.Name)
			if sn.Class != ir.PEXTERN {
				// Tell liveness we're about to build a new slice
				s.vars[memVar] = s.newValue1A(ssa.OpVarDef, types.TypeMem, sn, s.mem())
			}
		}