}
	s := types.NewStruct(fields)
	return s
}

func mkFuncType(rcvr *types.Type, ins []*types.Type, outs []*types.Type) *types.Type {
	q := typecheck.Lookup("?")
	inf := []*types.Field{}
	for _, it := range ins {
		inf = append(inf, mkParamResultField(it, q, ir.PPARAM))
	}
	outf := []*types.Field{}
	for _, ot := range outs {
		outf = append(outf, mkParamResultField(ot, q, ir.PPARAMOUT))
	}
	var rf *types.Field
	if rcvr != nil {

	// The backend may create more references of builtin functions.
	// We also want to include predefined types.
	// Add them.
	extras := append(fextras[:], enumerateBasicTypes()...)
	for _, b := range extras {
		prefix := ""
		if !strings.HasPrefix(b.name, "type:") {
			prefix = pkg + "."
		}
		name := prefix + b.name
		if decls[name] {

	outfilelist := filepath.Join(outdir, tag+"outfilelist.txt")
	var sb strings.Builder
	cv := filepath.Join(outdir, "covervars.go")
	outfs := []string{cv}
	fmt.Fprintf(&sb, "%s\n", cv)
	for _, inf := range infiles {
		base := filepath.Base(inf)
		of := filepath.Join(outdir, tag+".cov."+base)
		outfs = append(outfs, of)
		fmt.Fprintf(&sb, "%s\n", of)
	}
	if err := os.WriteFile(outfilelist, []byte(sb.String()), 0666); err != nil {