floitsch@google.com
f686f9aa49
In JS x >> y is equivalent to x >> (y & 31). Dart's semantics is different. Review URL: https://chromiumcodereview.appspot.com//10356095 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@7486 260f80e4-7a28-3924-810f-c04153c831b5
47 lines
933 B
Dart
47 lines
933 B
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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constants() {
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Expect.equals(0, 499 >> 33);
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Expect.equals(0, (499 << 33) & 0xFFFFFFFF);
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}
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foo(i) {
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if (i != 0) {
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y--;
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foo(i - 1);
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y++;
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}
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}
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var y;
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// id returns [x] in a way that should be difficult to predict statically.
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id(x) {
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y = x;
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foo(10);
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return y;
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}
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interceptors() {
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Expect.equals(0, id(499) >> 33);
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Expect.equals(0, (id(499) << 33) & 0xFFFFFFFF);
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}
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speculative() {
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var a = id(499);
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for (int i = 0; i < 1; i++) {
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Expect.equals(0, a >> 33);
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Expect.equals(0, (a << 33) & 0xFFFFFFFF);
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}
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}
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// JavaScript shifts by the amount modulo 32. That is x << y is equivalent to
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// x << (y & 0x1F). Dart does not.
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main() {
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constants();
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interceptors();
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speculative();
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}
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