1 // Copyright 2013 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 --expose-gc 29 30 // Limit the number of stress runs to reduce polymorphism it defeats some of the 31 // assumptions made about how elements transitions work because transition stubs 32 // end up going generic. 33 // Flags: --stress-runs=2 34 35 // Test element kind of objects. 36 // Since --smi-only-arrays affects builtins, its default setting at compile 37 // time sticks if built with snapshot. If --smi-only-arrays is deactivated 38 // by default, only a no-snapshot build actually has smi-only arrays enabled 39 // in this test case. Depending on whether smi-only arrays are actually 40 // enabled, this test takes the appropriate code path to check smi-only arrays. 41 42 support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8)); 43 44 if (support_smi_only_arrays) { 45 print("Tests include smi-only arrays."); 46 } else { 47 print("Tests do NOT include smi-only arrays."); 48 } 49 50 var elements_kind = { 51 fast_smi_only : 'fast smi only elements', 52 fast : 'fast elements', 53 fast_double : 'fast double elements', 54 dictionary : 'dictionary elements', 55 external_byte : 'external byte elements', 56 external_unsigned_byte : 'external unsigned byte elements', 57 external_short : 'external short elements', 58 external_unsigned_short : 'external unsigned short elements', 59 external_int : 'external int elements', 60 external_unsigned_int : 'external unsigned int elements', 61 external_float : 'external float elements', 62 external_double : 'external double elements', 63 external_pixel : 'external pixel elements' 64 } 65 66 function getKind(obj) { 67 if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only; 68 if (%HasFastObjectElements(obj)) return elements_kind.fast; 69 if (%HasFastDoubleElements(obj)) return elements_kind.fast_double; 70 if (%HasDictionaryElements(obj)) return elements_kind.dictionary; 71 // Every external kind is also an external array. 72 assertTrue(%HasExternalArrayElements(obj)); 73 if (%HasExternalByteElements(obj)) { 74 return elements_kind.external_byte; 75 } 76 if (%HasExternalUnsignedByteElements(obj)) { 77 return elements_kind.external_unsigned_byte; 78 } 79 if (%HasExternalShortElements(obj)) { 80 return elements_kind.external_short; 81 } 82 if (%HasExternalUnsignedShortElements(obj)) { 83 return elements_kind.external_unsigned_short; 84 } 85 if (%HasExternalIntElements(obj)) { 86 return elements_kind.external_int; 87 } 88 if (%HasExternalUnsignedIntElements(obj)) { 89 return elements_kind.external_unsigned_int; 90 } 91 if (%HasExternalFloatElements(obj)) { 92 return elements_kind.external_float; 93 } 94 if (%HasExternalDoubleElements(obj)) { 95 return elements_kind.external_double; 96 } 97 if (%HasExternalPixelElements(obj)) { 98 return elements_kind.external_pixel; 99 } 100 } 101 102 function assertKind(expected, obj, name_opt) { 103 if (!support_smi_only_arrays && 104 expected == elements_kind.fast_smi_only) { 105 expected = elements_kind.fast; 106 } 107 assertEquals(expected, getKind(obj), name_opt); 108 } 109 110 %NeverOptimizeFunction(construct_smis); 111 112 // This code exists to eliminate the learning influence of AllocationSites 113 // on the following tests. 114 var __sequence = 0; 115 function make_array_string() { 116 this.__sequence = this.__sequence + 1; 117 return "/* " + this.__sequence + " */ [0, 0, 0];" 118 } 119 function make_array() { 120 return eval(make_array_string()); 121 } 122 123 function construct_smis() { 124 var a = make_array(); 125 a[0] = 0; // Send the COW array map to the steak house. 126 assertKind(elements_kind.fast_smi_only, a); 127 return a; 128 } 129 130 %NeverOptimizeFunction(construct_doubles); 131 function construct_doubles() { 132 var a = construct_smis(); 133 a[0] = 1.5; 134 assertKind(elements_kind.fast_double, a); 135 return a; 136 } 137 138 %NeverOptimizeFunction(convert_mixed); 139 function convert_mixed(array, value, kind) { 140 array[1] = value; 141 assertKind(kind, array); 142 assertEquals(value, array[1]); 143 } 144 145 function test1() { 146 if (!support_smi_only_arrays) return; 147 148 // Test transition chain SMI->DOUBLE->FAST (crankshafted function will 149 // transition to FAST directly). 150 var smis = construct_smis(); 151 convert_mixed(smis, 1.5, elements_kind.fast_double); 152 153 var doubles = construct_doubles(); 154 convert_mixed(doubles, "three", elements_kind.fast); 155 156 convert_mixed(construct_smis(), "three", elements_kind.fast); 157 convert_mixed(construct_doubles(), "three", elements_kind.fast); 158 159 smis = construct_smis(); 160 doubles = construct_doubles(); 161 convert_mixed(smis, 1, elements_kind.fast); 162 convert_mixed(doubles, 1, elements_kind.fast); 163 assertTrue(%HaveSameMap(smis, doubles)); 164 } 165 166 test1(); 167 gc(); // clear IC state 168 test1(); 169 gc(); // clear IC state 170 %OptimizeFunctionOnNextCall(test1); 171 test1(); 172 gc(); // clear IC state 173
