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 29 // Flags: --nostress-opt 30 31 support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8)); 32 33 if (support_smi_only_arrays) { 34 print("Tests include smi-only arrays."); 35 } else { 36 print("Tests do NOT include smi-only arrays."); 37 } 38 39 if (support_smi_only_arrays) { 40 // This code exists to eliminate the learning influence of AllocationSites 41 // on the following tests. 42 var __sequence = 0; 43 function make_array_string(length) { 44 this.__sequence = this.__sequence + 1; 45 return "/* " + this.__sequence + " */ new Array(" + length + ");"; 46 } 47 function make_array(length) { 48 return eval(make_array_string(length)); 49 } 50 51 function test(test_double, test_object, set, length) { 52 // We apply the same operations to two identical arrays. The first array 53 // triggers an IC miss, upon which the conversion stub is generated, but the 54 // actual conversion is done in runtime. The second array, arriving at 55 // the previously patched IC, is then converted using the conversion stub. 56 var array_1 = make_array(length); 57 var array_2 = make_array(length); 58 59 // false, true, nice setter function, 20 60 assertTrue(%HasFastSmiElements(array_1)); 61 assertTrue(%HasFastSmiElements(array_2)); 62 for (var i = 0; i < length; i++) { 63 if (i == length - 5 && test_double) { 64 // Trigger conversion to fast double elements at length-5. 65 set(array_1, i, 0.5); 66 set(array_2, i, 0.5); 67 assertTrue(%HasFastDoubleElements(array_1)); 68 assertTrue(%HasFastDoubleElements(array_2)); 69 } else if (i == length - 3 && test_object) { 70 // Trigger conversion to fast object elements at length-3. 71 set(array_1, i, 'object'); 72 set(array_2, i, 'object'); 73 assertTrue(%HasFastObjectElements(array_1)); 74 assertTrue(%HasFastObjectElements(array_2)); 75 } else if (i != length - 7) { 76 // Set the element to an integer but leave a hole at length-7. 77 set(array_1, i, 2*i+1); 78 set(array_2, i, 2*i+1); 79 } 80 } 81 82 for (var i = 0; i < length; i++) { 83 if (i == length - 5 && test_double) { 84 assertEquals(0.5, array_1[i]); 85 assertEquals(0.5, array_2[i]); 86 } else if (i == length - 3 && test_object) { 87 assertEquals('object', array_1[i]); 88 assertEquals('object', array_2[i]); 89 } else if (i != length - 7) { 90 assertEquals(2*i+1, array_1[i]); 91 assertEquals(2*i+1, array_2[i]); 92 } else { 93 assertEquals(undefined, array_1[i]); 94 assertEquals(undefined, array_2[i]); 95 } 96 } 97 98 assertEquals(length, array_1.length); 99 assertEquals(length, array_2.length); 100 } 101 102 function run_test(test_double, test_object, set, length) { 103 test(test_double, test_object, set, length); 104 %ClearFunctionTypeFeedback(test); 105 } 106 107 run_test(false, false, function(a,i,v){ a[i] = v; }, 20); 108 run_test(true, false, function(a,i,v){ a[i] = v; }, 20); 109 run_test(false, true, function(a,i,v){ a[i] = v; }, 20); 110 run_test(true, true, function(a,i,v){ a[i] = v; }, 20); 111 112 run_test(false, false, function(a,i,v){ a[i] = v; }, 10000); 113 run_test(true, false, function(a,i,v){ a[i] = v; }, 10000); 114 run_test(false, true, function(a,i,v){ a[i] = v; }, 10000); 115 run_test(true, true, function(a,i,v){ a[i] = v; }, 10000); 116 117 // Check COW arrays 118 function get_cow() { return [1, 2, 3]; } 119 120 function transition(x) { x[0] = 1.5; } 121 122 var ignore = get_cow(); 123 transition(ignore); // Handled by runtime. 124 var a = get_cow(); 125 var b = get_cow(); 126 transition(a); // Handled by IC. 127 assertEquals(1.5, a[0]); 128 assertEquals(1, b[0]); 129 } else { 130 print("Test skipped because smi only arrays are not supported."); 131 } 132
