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 // 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. 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)); }