func (f *Func) SetHasDefer(b bool)                 { f.flags.set(funcHasDefer, b) }
func (f *Func) SetNilCheckDisabled(b bool)         { f.flags.set(funcNilCheckDisabled, b) }
func (f *Func) SetInlinabilityChecked(b bool)      { f.flags.set(funcInlinabilityChecked, b) }
func (f *Func) SetNeverReturns(b bool)             { f.flags.set(funcNeverReturns, b) }

	minitsym := typecheck.LookupNum("map.init.", mapinitgen)
	mapinitgen++

	fn := ir.NewFunc(n.Pos(), n.Pos(), minitsym, types.NewSignature(nil, nil, nil))
	fn.SetInlinabilityChecked(true) // suppress inlining (which would defeat the point)
	typecheck.DeclFunc(fn)
	if base.Debug.WrapGlobalMapDbg > 0 {
		fmt.Fprintf(os.Stderr, "=-= generated func is %v\n", fn)
	}