Joshua Litt
20faaa5d94
Change-Id: Ib18f554c1076f27a3f7c0df5a36410da41a1f467 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/148784 Reviewed-by: Paul Berry <paulberry@google.com> Reviewed-by: Sigmund Cherem <sigmund@google.com>
45 lines
1.0 KiB
Dart
45 lines
1.0 KiB
Dart
// Copyright (c) 2018, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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// @dart = 2.7
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import 'package:async_helper/async_helper.dart';
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import '../helpers/compiler_helper.dart';
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// A bug in UnaryNegateSpecializer left '-a' labelled as 'positive', allowing
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// misoptimization of '<<'.
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const String TEST1 = r"""
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foo(param) {
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var a = param ? 0xFFFFFFFF : 1;
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return 1 << -a;
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// present: '$shl'
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// absent: '_shlPositive'
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}
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""";
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const String TEST2 = r"""
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foo(param) {
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var a = param ? 0xFFFFFFFF : 1;
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return 1 << a;
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// present: '_shlPositive'
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// absent: '$shl'
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}
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""";
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main() {
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runTests() async {
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check(String test) async {
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await compile(test, entry: 'foo', check: checkerForAbsentPresent(test));
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}
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await check(TEST1);
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await check(TEST2);
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}
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asyncTest(() async {
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print('--test from kernel------------------------------------------------');
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await runTests();
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});
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}
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