JezK
Edit File: array-store-and-grow.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. // Verifies that the KeyedStoreIC correctly handles out-of-bounds stores // to an array that grow it by a single element. Test functions are // called twice to make sure that the IC is used, first call is handled // by the runtime in the miss stub. function array_store_1(a,b,c) { return (a[b] = c); } // Check handling of the empty array. var a = []; array_store_1(a, 0, 1); a = []; array_store_1(a, 0, 1); assertEquals(1, a[0]); assertEquals(1, array_store_1([], 0, 1)); a = []; for (x=0;x<100000;++x) { assertEquals(x, array_store_1(a, x, x)); } for (x=0;x<100000;++x) { assertEquals(x, array_store_1([], 0, x)); } function array_store_2(a,b,c) { return (a[b] = c); } a = []; array_store_2(a, 0, 0.5); a = []; array_store_2(a, 0, 0.5); assertEquals(0.5, a[0]); assertEquals(0.5, array_store_2([], 0, 0.5)); function array_store_3(a,b,c) { return (a[b] = c); } x = new Object(); a = []; array_store_3(a, 0, x); a = []; array_store_3(a, 0, x); assertEquals(x, a[0]); assertEquals(x, array_store_3([], 0, x)); // Check the handling of COW arrays function makeCOW() { return [1]; } function array_store_4(a,b,c) { return (a[b] = c); } a = makeCOW(); array_store_4(a, 1, 1); a = makeCOW(); array_store_4(a, 1, 1); assertEquals(1, a[1]); assertEquals(1, array_store_4([], 1, 1)); function array_store_5(a,b,c) { return (a[b] = c); } a = makeCOW(); array_store_5(a, 1, 0.5); a = makeCOW(); array_store_5(a, 1, 0.5); assertEquals(0.5, a[1]); assertEquals(0.5, array_store_5([], 1, 0.5)); function array_store_6(a,b,c) { return (a[b] = c); } a = makeCOW(); array_store_6(a, 1, x); a = makeCOW(); array_store_6(a, 1, x); assertEquals(x, a[1]); assertEquals(x, array_store_6([], 1, x)); // Check the handling of mutable arrays. a = new Array(1,2,3); array_store_4(a, 3, 1); a = new Array(1,2,3); array_store_4(a, 3, 1); assertEquals(1, a[3]); assertEquals(1, array_store_4([], 3, 1)); function array_store_5(a,b,c) { return (a[b] = c); } a = new Array(1,2,3); array_store_5(a, 3, 0.5); a = new Array(1,2,3); array_store_5(a, 3, 0.5); assertEquals(0.5, a[3]); assertEquals(0.5, array_store_5([], 3, 0.5)); function array_store_6(a,b,c) { return (a[b] = c); } a = new Array(1,2,3); array_store_6(a, 3, x); a = new Array(1,2,3); array_store_6(a, 3, x); assertEquals(x, a[3]); assertEquals(x, array_store_6([], 3, x)); function array_store_7(a,b,c) { return (a[b] = c); } // Check the handling of mutable arrays of doubles var a = new Array(0.5, 1.5); array_store_7(a, 2, .5); a = new Array(0.5, 1.5); array_store_7(a, 2, .5); assertEquals(0.5, a[2]); a = new Array(0.5, 1.5); assertEquals(0.5, array_store_7(a, 2, 0.5)); for (x=0;x<100000;++x) { a = new Array(0.5, 1.5); assertEquals(x, array_store_7(a, 2, x)); } function array_store_8(a,b,c) { return (a[b] = c); } var a = new Array(0.5, 1.5); array_store_8(a, 2, .5); a = new Array(0.5, 1.5); array_store_8(a, 10, .5); assertEquals(0.5, a[10]); // Grow the empty array with a double store. function array_store_9(a,b,c) { return (a[b] = c); } var a = []; array_store_9(a, 0, 0.5); a = []; array_store_1(a, 0, 0.5); assertEquals(0.5, a[0]); assertEquals(0.5, array_store_1([], 0, 0.5));