| // Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file |
| // for details. All rights reserved. Use of this source code is governed by a |
| // BSD-style license that can be found in the LICENSE file. |
| |
| import 'compiler_helper.dart'; |
| |
| const String FIB = r""" |
| fib(n) { |
| if (n <= 1) return 1; |
| return add(fib(n - 1), fib(n - 2)); |
| } |
| |
| // We need this artificial add method because |
| // our optimizer will actually add type checks |
| // for the result of recursively calling fib |
| // which introduces new variables because we |
| // now have multiple users. |
| // The 'if' has been added to avoid inlining of add. |
| add(x, y) { |
| if (x == -1) return x; |
| return x + y; |
| } |
| """; |
| |
| main() { |
| // Make sure we don't introduce a new variable. |
| RegExp regexp = new RegExp("var $anyIdentifier ="); |
| compileAndDoNotMatch(FIB, 'fib', regexp); |
| } |
