1 // Copyright 2012 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 // Flags: --allow-natives-syntax --smi-only-arrays --notrack-allocation-sites 29 30 support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8)); 31 32 if (support_smi_only_arrays) { 33 print("Tests include smi-only arrays."); 34 } else { 35 print("Tests do NOT include smi-only arrays."); 36 } 37 38 if (support_smi_only_arrays) { 39 function test(test_double, test_object, set, length) { 40 // We apply the same operations to two identical arrays. The first array 41 // triggers an IC miss, upon which the conversion stub is generated, but the 42 // actual conversion is done in runtime. The second array, arriving at 43 // the previously patched IC, is then converted using the conversion stub. 44 var array_1 = new Array(length); 45 var array_2 = new Array(length); 46 47 assertTrue(%HasFastSmiElements(array_1)); 48 assertTrue(%HasFastSmiElements(array_2)); 49 for (var i = 0; i < length; i++) { 50 if (i == length - 5 && test_double) { 51 // Trigger conversion to fast double elements at length-5. 52 set(array_1, i, 0.5); 53 set(array_2, i, 0.5); 54 assertTrue(%HasFastDoubleElements(array_1)); 55 assertTrue(%HasFastDoubleElements(array_2)); 56 } else if (i == length - 3 && test_object) { 57 // Trigger conversion to fast object elements at length-3. 58 set(array_1, i, 'object'); 59 set(array_2, i, 'object'); 60 assertTrue(%HasFastObjectElements(array_1)); 61 assertTrue(%HasFastObjectElements(array_2)); 62 } else if (i != length - 7) { 63 // Set the element to an integer but leave a hole at length-7. 64 set(array_1, i, 2*i+1); 65 set(array_2, i, 2*i+1); 66 } 67 } 68 69 for (var i = 0; i < length; i++) { 70 if (i == length - 5 && test_double) { 71 assertEquals(0.5, array_1[i]); 72 assertEquals(0.5, array_2[i]); 73 } else if (i == length - 3 && test_object) { 74 assertEquals('object', array_1[i]); 75 assertEquals('object', array_2[i]); 76 } else if (i != length - 7) { 77 assertEquals(2*i+1, array_1[i]); 78 assertEquals(2*i+1, array_2[i]); 79 } else { 80 assertEquals(undefined, array_1[i]); 81 assertEquals(undefined, array_2[i]); 82 } 83 } 84 85 assertEquals(length, array_1.length); 86 assertEquals(length, array_2.length); 87 } 88 89 test(false, false, function(a,i,v){ a[i] = v; }, 20); 90 test(true, false, function(a,i,v){ a[i] = v; }, 20); 91 test(false, true, function(a,i,v){ a[i] = v; }, 20); 92 test(true, true, function(a,i,v){ a[i] = v; }, 20); 93 94 test(false, false, function(a,i,v){ a[i] = v; }, 10000); 95 test(true, false, function(a,i,v){ a[i] = v; }, 10000); 96 test(false, true, function(a,i,v){ a[i] = v; }, 10000); 97 test(true, true, function(a,i,v){ a[i] = v; }, 10000); 98 99 // Check COW arrays 100 function get_cow() { return [1, 2, 3]; } 101 102 function transition(x) { x[0] = 1.5; } 103 104 var ignore = get_cow(); 105 transition(ignore); // Handled by runtime. 106 var a = get_cow(); 107 var b = get_cow(); 108 transition(a); // Handled by IC. 109 assertEquals(1.5, a[0]); 110 assertEquals(1, b[0]); 111 } else { 112 print("Test skipped because smi only arrays are not supported."); 113 } 114
