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https://github.com/dart-lang/sdk
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35da19ac07
Change-Id: I0e97add738bc79314a210cf137525b7391467fc2 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/152595 Reviewed-by: Siva Annamalai <asiva@google.com> Commit-Queue: Bob Nystrom <rnystrom@google.com> Auto-Submit: Bob Nystrom <rnystrom@google.com>
78 lines
2.8 KiB
Dart
78 lines
2.8 KiB
Dart
// Copyright (c) 2012, 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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//
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// Dart test program for testing left shifts of a constant.
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import "package:expect/expect.dart";
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shiftLeft0(c) => 0 << c;
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shiftLeft1(c) => 1 << c;
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shiftLeft8448(c) => 8448 << c;
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shiftLeftNeg1(c) => -1 << c;
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shiftLeftNeg8448(c) => -8448 << c;
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main() {
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// Optimize shifts.
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for (int i = 0; i < 6000; i++) {
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shiftLeft1(2);
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shiftLeft0(2);
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shiftLeft8448(2);
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shiftLeftNeg1(2);
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shiftLeftNeg8448(2);
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}
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for (int i = 0; i < 80; i++) {
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Expect.equals(0, shiftLeft0(i));
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}
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// Exceptions.
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Expect.throws(() => shiftLeft0(-1));
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Expect.equals(1, shiftLeft1(0));
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Expect.equals(128, shiftLeft1(7));
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Expect.equals(536870912, shiftLeft1(29));
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// Deoptimize on 32-bit.
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Expect.equals(1073741824, shiftLeft1(30));
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Expect.equals(2147483648, shiftLeft1(31));
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Expect.equals(1152921504606846976, shiftLeft1(60));
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Expect.equals(2305843009213693952, shiftLeft1(61));
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// Deoptimize on 64 bits.
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Expect.equals(4611686018427387904, shiftLeft1(62));
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Expect.equals(-9223372036854775808, shiftLeft1(63));
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Expect.equals(8448, shiftLeft8448(0));
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Expect.equals(1081344, shiftLeft8448(7));
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Expect.equals(553648128, shiftLeft8448(16));
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// Deoptimize on 32-bit.
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Expect.equals(1107296256, shiftLeft8448(17));
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Expect.equals(2214592512, shiftLeft8448(18));
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Expect.equals(1188950301625810944, shiftLeft8448(47));
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Expect.equals(2377900603251621888, shiftLeft8448(48));
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// Deoptimize on 64 bits.
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Expect.equals(4755801206503243776, shiftLeft8448(49));
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Expect.equals(-8935141660703064064, shiftLeft8448(50));
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Expect.equals(-1, shiftLeftNeg1(0));
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Expect.equals(-128, shiftLeftNeg1(7));
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Expect.equals(-536870912, shiftLeftNeg1(29));
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// Deoptimize on 32-bit.
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Expect.equals(-1073741824, shiftLeftNeg1(30));
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Expect.equals(-2147483648, shiftLeftNeg1(31));
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Expect.equals(-1152921504606846976, shiftLeftNeg1(60));
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Expect.equals(-2305843009213693952, shiftLeftNeg1(61));
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// Deoptimize on 64 bits.
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Expect.equals(-4611686018427387904, shiftLeftNeg1(62));
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Expect.equals(-9223372036854775808, shiftLeftNeg1(63));
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Expect.equals(-8448, shiftLeftNeg8448(0));
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Expect.equals(-1081344, shiftLeftNeg8448(7));
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Expect.equals(-553648128, shiftLeftNeg8448(16));
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// Deoptimize on 32-bit.
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Expect.equals(-1107296256, shiftLeftNeg8448(17));
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Expect.equals(-2214592512, shiftLeftNeg8448(18));
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Expect.equals(-1188950301625810944, shiftLeftNeg8448(47));
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Expect.equals(-2377900603251621888, shiftLeftNeg8448(48));
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// Deoptimize on 64 bits.
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Expect.equals(-4755801206503243776, shiftLeftNeg8448(49));
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Expect.equals(8935141660703064064, shiftLeftNeg8448(50));
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}
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