Robert Nystrom
2034061433
Change-Id: I313a57ed7c7ea2ada75065f55a7367376f6bdae5 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/152183 Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com> Reviewed-by: Srujan Gaddam <srujzs@google.com>
55 lines
1.4 KiB
Dart
55 lines
1.4 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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// Test canonicalization of integer shift operations.
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// This is a regression test for dartbug.com/34288.
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// VMOptions=--no_background_compilation --optimization_counter_threshold=10
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import "package:expect/expect.dart";
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int _shl_63(int x) => x << 63;
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int _shl_64(int x) => x << 64;
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int _shl_65(int x) => x << 65;
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int _shl_m1(int x) => x << -1;
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int _shr_63(int x) => x >> 63;
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int _shr_64(int x) => x >> 64;
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int _shr_65(int x) => x >> 65;
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int _shr_m1(int x) => x >> -1;
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// Non-constant values.
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int one = 1;
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int minusOne = -1;
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doTests() {
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Expect.equals(0x8000000000000000, _shl_63(one));
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Expect.equals(0x8000000000000000, _shl_63(minusOne));
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Expect.equals(0, _shl_64(one));
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Expect.equals(0, _shl_64(minusOne));
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Expect.equals(0, _shl_65(one));
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Expect.equals(0, _shl_65(minusOne));
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Expect.throws<ArgumentError>(() {
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_shl_m1(one);
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});
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Expect.equals(0, _shr_63(one));
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Expect.equals(-1, _shr_63(minusOne));
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Expect.equals(0, _shr_64(one));
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Expect.equals(-1, _shr_64(minusOne));
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Expect.equals(0, _shr_65(one));
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Expect.equals(-1, _shr_65(minusOne));
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Expect.throws<ArgumentError>(() {
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_shr_m1(one);
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});
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}
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void main() {
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for (int i = 0; i < 20; ++i) {
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doTests();
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}
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}
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