}
	return flist
}
`)

	mkbuiltin(&b, "runtime")
	mkbuiltin(&b, "coverage")

	var err error
	out := b.Bytes()
	if !*nofmt {
		out, err = format.Source(out)
		if err != nil {
			log.Fatal(err)
		}
	}
	if *stdout {
		_, err = os.Stdout.Write(out)
	} else {
		err = os.WriteFile("builtin.go", out, 0666)
	}
	if err != nil {
		log.Fatal(err)
	}
}

func main() {
	flag.Parse()

	var b bytes.Buffer
	fmt.Fprintln(&b, "// Code generated by mkbuiltin.go. DO NOT EDIT.")
	fmt.Fprintln(&b)
	fmt.Fprintln(&b, "package goobj")

	mkbuiltin(&b)

	out, err := format.Source(b.Bytes())
	if err != nil {
		log.Fatal(err)
	}
	if *stdout {
		_, err = os.Stdout.Write(out)
	} else {

	testenv.MustHaveGoRun(t)
	t.Parallel()

	old, err := os.ReadFile("builtin.go")
	if err != nil {
		t.Fatal(err)
	}

	new, err := testenv.Command(t, testenv.GoToolPath(t), "run", "mkbuiltin.go", "-stdout").Output()
	if err != nil {
		t.Fatal(err)
	}

	if !bytes.Equal(old, new) {
		t.Fatal("builtin.go out of date; run mkbuiltin.go")
	}

// Code generated by mkbuiltin.go. DO NOT EDIT.

package goobj

var builtins = [...]struct {
	name string
	abi  int
}{
	{"runtime.newobject", 1},
	{"runtime.mallocgc", 1},
	{"runtime.panicdivide", 1},
	{"runtime.panicshift", 1},
	{"runtime.panicmakeslicelen", 1},
	{"runtime.panicmakeslicecap", 1},
	{"runtime.throwinit", 1},
	{"runtime.panicwrap", 1},
	{"runtime.gopanic", 1},
	{"runtime.gorecover", 1},

// Code generated by mkbuiltin.go. DO NOT EDIT.

package typecheck

import (
	"cmd/compile/internal/types"
	"cmd/internal/src"
)

// Not inlining this function removes a significant chunk of init code.
//
//go:noinline
func newSig(params, results []*types.Field) *types.Type {
	return types.NewSignature(nil, params, results)
}

func params(tlist ...*types.Type) []*types.Field {
	flist := make([]*types.Field, len(tlist))

	GroupVersionResource() schema.GroupVersionResource

	// IsClusterScoped indicates that this resource is scoped to a particular namespace within a cluster.
	IsClusterScoped() bool

	// IsBuiltin indicates that this resource is builtin (not a CRD)
	IsBuiltin() bool

	// Identifier returns a unique identifier for the resource
	Identifier() string

	// Kind for this resource.
	Kind() string

Russ Cox <******@****.***> 1709234889 -0500

	exprFlags
}

type exprFlags uint16

func (f exprFlags) IsVoid() bool          { return f&1 != 0 }
func (f exprFlags) IsType() bool          { return f&2 != 0 }
func (f exprFlags) IsBuiltin() bool       { return f&4 != 0 } // a language builtin that resembles a function call, e.g., "make, append, new"
func (f exprFlags) IsValue() bool         { return f&8 != 0 }
func (f exprFlags) IsNil() bool           { return f&16 != 0 }

			typVal := info.Types[n.Fun]
			switch {
			case typVal.IsType():
				// Type conversion, which is safe.
			case typVal.IsBuiltin():
				// Builtin func, conservatively assumed to not
				// be safe for now.
				safe = false
				return false
			default:
				// A non-builtin func or method call.
				// Conservatively assume that all of them have
				// side effects for now.
				safe = false
				return false
			}

// 12:26 | 2                   | value   : int = 2

func mode(tv types2.TypeAndValue) string {
	switch {
	case tv.IsVoid():
		return "void"
	case tv.IsType():
		return "type"
	case tv.IsBuiltin():
		return "builtin"
	case tv.IsNil():
		return "nil"
	case tv.Assignable():
		if tv.Addressable() {
			return "var"
		}
		return "mapindex"
	case tv.IsValue():
		return "value"
	default: