| // Copyright (c) 2012, 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 test program for testing left shifts of a constant. |
| |
| // @dart = 2.9 |
| |
| import "package:expect/expect.dart"; |
| |
| shiftLeft0(c) => 0 << c; |
| shiftLeft1(c) => 1 << c; |
| shiftLeft8448(c) => 8448 << c; |
| |
| shiftLeftNeg1(c) => -1 << c; |
| shiftLeftNeg8448(c) => -8448 << c; |
| |
| main() { |
| // Optimize shifts. |
| for (int i = 0; i < 6000; i++) { |
| shiftLeft1(2); |
| shiftLeft0(2); |
| shiftLeft8448(2); |
| shiftLeftNeg1(2); |
| shiftLeftNeg8448(2); |
| } |
| for (int i = 0; i < 80; i++) { |
| Expect.equals(0, shiftLeft0(i)); |
| } |
| // Exceptions. |
| Expect.throws(() => shiftLeft0(-1)); |
| |
| Expect.equals(1, shiftLeft1(0)); |
| Expect.equals(128, shiftLeft1(7)); |
| Expect.equals(536870912, shiftLeft1(29)); |
| // Deoptimize on 32-bit. |
| Expect.equals(1073741824, shiftLeft1(30)); |
| Expect.equals(2147483648, shiftLeft1(31)); |
| Expect.equals(1152921504606846976, shiftLeft1(60)); |
| Expect.equals(2305843009213693952, shiftLeft1(61)); |
| // Deoptimize on 64 bits. |
| Expect.equals(4611686018427387904, shiftLeft1(62)); |
| Expect.equals(-9223372036854775808, shiftLeft1(63)); |
| |
| Expect.equals(8448, shiftLeft8448(0)); |
| Expect.equals(1081344, shiftLeft8448(7)); |
| Expect.equals(553648128, shiftLeft8448(16)); |
| // Deoptimize on 32-bit. |
| Expect.equals(1107296256, shiftLeft8448(17)); |
| Expect.equals(2214592512, shiftLeft8448(18)); |
| Expect.equals(1188950301625810944, shiftLeft8448(47)); |
| Expect.equals(2377900603251621888, shiftLeft8448(48)); |
| // Deoptimize on 64 bits. |
| Expect.equals(4755801206503243776, shiftLeft8448(49)); |
| Expect.equals(-8935141660703064064, shiftLeft8448(50)); |
| |
| Expect.equals(-1, shiftLeftNeg1(0)); |
| Expect.equals(-128, shiftLeftNeg1(7)); |
| Expect.equals(-536870912, shiftLeftNeg1(29)); |
| // Deoptimize on 32-bit. |
| Expect.equals(-1073741824, shiftLeftNeg1(30)); |
| Expect.equals(-2147483648, shiftLeftNeg1(31)); |
| Expect.equals(-1152921504606846976, shiftLeftNeg1(60)); |
| Expect.equals(-2305843009213693952, shiftLeftNeg1(61)); |
| // Deoptimize on 64 bits. |
| Expect.equals(-4611686018427387904, shiftLeftNeg1(62)); |
| Expect.equals(-9223372036854775808, shiftLeftNeg1(63)); |
| |
| Expect.equals(-8448, shiftLeftNeg8448(0)); |
| Expect.equals(-1081344, shiftLeftNeg8448(7)); |
| Expect.equals(-553648128, shiftLeftNeg8448(16)); |
| // Deoptimize on 32-bit. |
| Expect.equals(-1107296256, shiftLeftNeg8448(17)); |
| Expect.equals(-2214592512, shiftLeftNeg8448(18)); |
| Expect.equals(-1188950301625810944, shiftLeftNeg8448(47)); |
| Expect.equals(-2377900603251621888, shiftLeftNeg8448(48)); |
| // Deoptimize on 64 bits. |
| Expect.equals(-4755801206503243776, shiftLeftNeg8448(49)); |
| Expect.equals(8935141660703064064, shiftLeftNeg8448(50)); |
| } |