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 29 // Flags: --nostress-opt 30 31 // This code exists to eliminate the learning influence of AllocationSites 32 // on the following tests. 33 var __sequence = 0; 34 function make_array_string(length) { 35 this.__sequence = this.__sequence + 1; 36 return "/* " + this.__sequence + " */ new Array(" + length + ");"; 37 } 38 function make_array(length) { 39 return eval(make_array_string(length)); 40 } 41 42 function test(test_double, test_object, set, length) { 43 // We apply the same operations to two identical arrays. The first array 44 // triggers an IC miss, upon which the conversion stub is generated, but the 45 // actual conversion is done in runtime. The second array, arriving at 46 // the previously patched IC, is then converted using the conversion stub. 47 var array_1 = make_array(length); 48 var array_2 = make_array(length); 49 50 // false, true, nice setter function, 20 51 assertTrue(%HasFastSmiElements(array_1)); 52 assertTrue(%HasFastSmiElements(array_2)); 53 for (var i = 0; i < length; i++) { 54 if (i == length - 5 && test_double) { 55 // Trigger conversion to fast double elements at length-5. 56 set(array_1, i, 0.5); 57 set(array_2, i, 0.5); 58 assertTrue(%HasFastDoubleElements(array_1)); 59 assertTrue(%HasFastDoubleElements(array_2)); 60 } else if (i == length - 3 && test_object) { 61 // Trigger conversion to fast object elements at length-3. 62 set(array_1, i, 'object'); 63 set(array_2, i, 'object'); 64 assertTrue(%HasFastObjectElements(array_1)); 65 assertTrue(%HasFastObjectElements(array_2)); 66 } else if (i != length - 7) { 67 // Set the element to an integer but leave a hole at length-7. 68 set(array_1, i, 2*i+1); 69 set(array_2, i, 2*i+1); 70 } 71 } 72 73 for (var i = 0; i < length; i++) { 74 if (i == length - 5 && test_double) { 75 assertEquals(0.5, array_1[i]); 76 assertEquals(0.5, array_2[i]); 77 } else if (i == length - 3 && test_object) { 78 assertEquals('object', array_1[i]); 79 assertEquals('object', array_2[i]); 80 } else if (i != length - 7) { 81 assertEquals(2*i+1, array_1[i]); 82 assertEquals(2*i+1, array_2[i]); 83 } else { 84 assertEquals(undefined, array_1[i]); 85 assertEquals(undefined, array_2[i]); 86 } 87 } 88 89 assertEquals(length, array_1.length); 90 assertEquals(length, array_2.length); 91 } 92 93 function run_test(test_double, test_object, set, length) { 94 test(test_double, test_object, set, length); 95 %ClearFunctionTypeFeedback(test); 96 } 97 98 run_test(false, false, function(a,i,v){ a[i] = v; }, 20); 99 run_test(true, false, function(a,i,v){ a[i] = v; }, 20); 100 run_test(false, true, function(a,i,v){ a[i] = v; }, 20); 101 run_test(true, true, function(a,i,v){ a[i] = v; }, 20); 102 103 run_test(false, false, function(a,i,v){ a[i] = v; }, 10000); 104 run_test(true, false, function(a,i,v){ a[i] = v; }, 10000); 105 run_test(false, true, function(a,i,v){ a[i] = v; }, 10000); 106 run_test(true, true, function(a,i,v){ a[i] = v; }, 10000); 107 108 // Check COW arrays 109 function get_cow() { return [1, 2, 3]; } 110 111 function transition(x) { x[0] = 1.5; } 112 113 var ignore = get_cow(); 114 transition(ignore); // Handled by runtime. 115 var a = get_cow(); 116 var b = get_cow(); 117 transition(a); // Handled by IC. 118 assertEquals(1.5, a[0]); 119 assertEquals(1, b[0]); 120
