Ryan Macnak
2c371ff74e
TEST=ci Change-Id: Ib2b1a9b067beb1cbeea2b12355e62a45396697f5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/192726 Reviewed-by: Martin Kustermann <kustermann@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
48 lines
1.2 KiB
Dart
48 lines
1.2 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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// VMOptions=--no_background_compilation --optimization_counter_threshold=10
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// VMOptions=--no_background_compilation --optimization_counter_threshold=10 --use_slow_path
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import "package:expect/expect.dart";
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// Tests for long negations under
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// 64-bit arithmetic wrap-around semantics.
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final int maxInt32 = 2147483647;
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final int minInt32 = -2147483648;
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final int maxInt64 = 0x7fffffffffffffff;
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final int minInt64 = 0x8000000000000000;
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int negate(int x) {
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return -x;
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}
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doConstant() {
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Expect.equals(1, negate(-1));
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Expect.equals(0, negate(0));
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Expect.equals(-1, negate(1));
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Expect.equals(-maxInt32, negate(maxInt32));
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Expect.equals(-minInt32, negate(minInt32));
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Expect.equals(-maxInt64, negate(maxInt64));
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Expect.equals(minInt64, negate(minInt64)); // sic!
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}
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doVar() {
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int d = 0;
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for (int i = -88; i < 10; i++) {
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d += negate(i);
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}
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Expect.equals(3871, d);
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}
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main() {
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// Repeat tests to enter JIT (when applicable).
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for (int i = 0; i < 20; i++) {
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doConstant();
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doVar();
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}
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}
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