blob: 7b2eae52c88de668e668e52f434a357115529fe4 [file] [log] [blame]
// Copyright (c) 2019, 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.
// Verify running with --print-flow-graph produces deterministic output. This is
// useful for removing noise when tracking down the effects of compiler changes.
import 'dart:async';
import 'dart:io';
import 'snapshot_test_helper.dart';
import 'package:expect/expect.dart';
int fib(int n) {
if (n <= 1) return 1;
return fib(n - 1) + fib(n - 2);
}
Future<void> main(List<String> args) async {
if (args.contains('--child')) {
print(fib(35));
return;
}
if (!Platform.script.toString().endsWith(".dart")) {
return; // Not running from source: skip for app-jit and app-aot.
}
if (Platform.executable.contains("Product")) {
return; // No flow graph printer in product mode.
}
final result1 = await runDart('GENERATE CFG 1', [
'--deterministic',
'--print-flow-graph',
Platform.script.toFilePath(),
'--child'
]);
final cfg1 = result1.processResult.stderr;
final result2 = await runDart('GENERATE CFG 2', [
'--deterministic',
'--print-flow-graph',
Platform.script.toFilePath(),
'--child'
]);
final cfg2 = result2.processResult.stderr;
Expect.isTrue(
cfg1.contains("*** BEGIN CFG"), "Printed at least one function");
Expect.stringEquals(cfg1, cfg2);
}