deleted = true
			copy(gen.Specs[j:], gen.Specs[j+1:])
			gen.Specs = gen.Specs[:len(gen.Specs)-1]

			// If this was the last import spec in this decl,
			// delete the decl, too.
			if len(gen.Specs) == 0 {
				copy(f.Decls[i:], f.Decls[i+1:])
				f.Decls = f.Decls[:len(f.Decls)-1]
				i--
				break
			} else if len(gen.Specs) == 1 {
				if impspec.Doc != nil {
					delcomments = append(delcomments, impspec.Doc)
				}

	// Collect declarations from all package files.
	var decls []Decl
	if ndecls > 0 {
		decls = make([]Decl, ndecls)
		funcs := make(map[string]int) // map of func name -> decls index
		i := 0                        // current index
		n := 0                        // number of filtered entries
		for _, filename := range filenames {
			f := pkg.Files[filename]
			for _, d := range f.Decls {
				if mode&FilterFuncDuplicates != 0 {

func declsFromComments(handle *token.File, src []byte) map[token.Pos]token.Pos {
	decls, uses := positionMarkers(handle, src)

	objmap := make(map[token.Pos]token.Pos)
	// Join decls and uses on name, to build the map of use->decl.
	for name, posns := range uses {
		declpos, ok := decls[name]
		if !ok {
			panic(fmt.Sprintf("missing declaration for %s", name))
		}
		for _, pos := range posns {

	"strconv"
	"strings"
)

const ntest = 1100

func main() {
	var decls, calls bytes.Buffer

	for i := 1; i <= ntest; i++ {
		s := strconv.Itoa(i)
		decls.WriteString(strings.Replace(decl, "$", s, -1))
		calls.WriteString(strings.Replace("poison$()\n\tclearfat$()\n\t", "$", s, -1))
	}

	program = strings.Replace(program, "$DECLS", decls.String(), 1)
	program = strings.Replace(program, "$CALLS", calls.String(), 1)

	"fmt"
	"strconv"
	"strings"
)

const ntest = 1024

func main() {
	var decls, calls bytes.Buffer

	for i := 1; i <= ntest; i++ {
		s := strconv.Itoa(i)
		decls.WriteString(strings.Replace(decl, "$", s, -1))
		calls.WriteString(strings.Replace("call(test$)\n\t", "$", s, -1))
	}

	program = strings.Replace(program, "$DECLS", decls.String(), 1)
	program = strings.Replace(program, "$CALLS", calls.String(), 1)

	if err != nil {
		t.Fatal(err)
	}
	cmap := NewCommentMap(fset, f, f.Comments)

	// delete variable declaration
	for i, decl := range f.Decls {
		if gen, ok := decl.(*GenDecl); ok && gen.Tok == token.VAR {
			copy(f.Decls[i:], f.Decls[i+1:])
			f.Decls = f.Decls[:len(f.Decls)-1]
			break
		}
	}

	// check if comments are filtered correctly
	cc := cmap.Filter(f)
	for n, list := range cc {

    name = "tfrt_fallback_sync_opdefs_inc_gen",
    tbl_outs = [
        (
            ["-gen-op-decls"],
            "tfrt_fallback_sync.h.inc",
        ),
        (
            ["-gen-op-defs"],
            "tfrt_fallback_sync.cpp.inc",
        ),
        (
            [
                "-gen-dialect-decls",
                "-dialect=tfrt_fallback_sync",
            ],

					impIndex = j
				}
			}
		}
	}

	// If no import decl found, add one after the last import.
	if impDecl == nil {
		impDecl = &ast.GenDecl{
			Tok: token.IMPORT,
		}
		f.Decls = append(f.Decls, nil)
		copy(f.Decls[lastImport+2:], f.Decls[lastImport+1:])
		f.Decls[lastImport+1] = impDecl
	}

	// Ensure the import decl has parentheses, if needed.

	if err != nil {
		log.Fatal(err)
	}

	decls := make(map[string]bool)

	fmt.Fprintf(w, "var builtins = [...]struct{ name string; abi int }{\n")
	for _, decl := range f.Decls {
		switch decl := decl.(type) {
		case *ast.FuncDecl:
			if decl.Recv != nil {
				log.Fatal("methods unsupported")
			}
			if decl.Body != nil {
				log.Fatal("unexpected function body")
			}

	cmap := ast.NewCommentMap(fset, f, f.Comments)

	// Remove the first variable declaration from the list of declarations.
	for i, decl := range f.Decls {
		if gen, ok := decl.(*ast.GenDecl); ok && gen.Tok == token.VAR {
			copy(f.Decls[i:], f.Decls[i+1:])
			f.Decls = f.Decls[:len(f.Decls)-1]
			break
		}
	}

	// Use the comment map to filter comments that don't belong anymore