v8/test/mjsunit/compiler/array-length.js

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// Copyright 2010 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --allow-natives-syntax
function ArrayLength(a) { return a.length; }
function Test(a0, a2, a5) {
assertEquals(0, ArrayLength(a0));
assertEquals(2, ArrayLength(a2));
assertEquals(5, ArrayLength(a5));
}
var a0 = [];
var a2 = [1,2];
var a5 = [1,2,3,4,5];
for (var i = 0; i < 5; i++) Test(a0, a2, a5);
%OptimizeFunctionOnNextCall(ArrayLength);
%OptimizeFunctionOnNextCall(Test);
Test(a0, a2, a5);
assertEquals("undefined", typeof(ArrayLength(0)));
for (var i = 0; i < 5; i++) Test(a0, a2, a5);
%OptimizeFunctionOnNextCall(Test);
Test(a0, a2, a5);
assertEquals(4, ArrayLength("hest"));