JezK
Edit File: packed-elements.js
// Copyright 2012 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 --smi-only-arrays --packed-arrays var has_packed_elements = !%HasFastHoleyElements(Array()); function test1() { var a = Array(8); assertTrue(%HasFastSmiOrObjectElements(a)); assertTrue(%HasFastHoleyElements(a)); } function test2() { var a = Array(); assertTrue(%HasFastSmiOrObjectElements(a)); assertFalse(%HasFastHoleyElements(a)); } function test3() { var a = Array(1,2,3,4,5,6,7); assertTrue(%HasFastSmiOrObjectElements(a)); assertFalse(%HasFastHoleyElements(a)); } function test4() { var a = [1, 2, 3, 4]; assertTrue(%HasFastSmiElements(a)); assertFalse(%HasFastHoleyElements(a)); var b = [1, 2,, 4]; assertTrue(%HasFastSmiElements(b)); assertTrue(%HasFastHoleyElements(b)); } function test5() { var a = [1, 2, 3, 4.5]; assertTrue(%HasFastDoubleElements(a)); assertFalse(%HasFastHoleyElements(a)); var b = [1,, 3.5, 4]; assertTrue(%HasFastDoubleElements(b)); assertTrue(%HasFastHoleyElements(b)); var c = [1, 3.5,, 4]; assertTrue(%HasFastDoubleElements(c)); assertTrue(%HasFastHoleyElements(c)); } function test6() { var x = new Object(); var a = [1, 2, 3.5, x]; assertTrue(%HasFastObjectElements(a)); assertFalse(%HasFastHoleyElements(a)); assertEquals(1, a[0]); assertEquals(2, a[1]); assertEquals(3.5, a[2]); assertEquals(x, a[3]); var b = [1,, 3.5, x]; assertTrue(%HasFastObjectElements(b)); assertTrue(%HasFastHoleyElements(b)); assertEquals(1, b[0]); assertEquals(undefined, b[1]); assertEquals(3.5, b[2]); assertEquals(x, b[3]); var c = [1, 3.5, x,,]; assertTrue(%HasFastObjectElements(c)); assertTrue(%HasFastHoleyElements(c)); assertEquals(1, c[0]); assertEquals(3.5, c[1]); assertEquals(x, c[2]); assertEquals(undefined, c[3]); } function test_with_optimization(f) { // Run tests in a loop to make sure that inlined Array() constructor runs out // of new space memory and must fall back on runtime impl. for (i = 0; i < 250000; ++i) f(); %OptimizeFunctionOnNextCall(f); for (i = 0; i < 250000; ++i) f(); // Make sure GC happens } if (has_packed_elements) { test_with_optimization(test1); test_with_optimization(test2); test_with_optimization(test3); test_with_optimization(test4); test_with_optimization(test5); test_with_optimization(test6); }