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// Copyright (c) 2018, 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.
// @dart = 2.9
// VMOptions=--no_background_compilation --optimization_counter_threshold=10
// VMOptions=--no_background_compilation --optimization_counter_threshold=10 --use_slow_path
import "package:expect/expect.dart";
// Tests for long negations under
// 64-bit arithmetic wrap-around semantics.
final int maxInt32 = 2147483647;
final int minInt32 = -2147483648;
final int maxInt64 = 0x7fffffffffffffff;
final int minInt64 = 0x8000000000000000;
int negate(int x) {
return -x;
}
doConstant() {
Expect.equals(1, negate(-1));
Expect.equals(0, negate(0));
Expect.equals(-1, negate(1));
Expect.equals(-maxInt32, negate(maxInt32));
Expect.equals(-minInt32, negate(minInt32));
Expect.equals(-maxInt64, negate(maxInt64));
Expect.equals(minInt64, negate(minInt64)); // sic!
}
doVar() {
int d = 0;
for (int i = -88; i < 10; i++) {
d += negate(i);
}
Expect.equals(3871, d);
}
main() {
// Repeat tests to enter JIT (when applicable).
for (int i = 0; i < 20; i++) {
doConstant();
doVar();
}
}