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 --expose-gc 29 30 var elements_kind = { 31 fast_smi_only : 'fast smi only elements', 32 fast : 'fast elements', 33 fast_double : 'fast double elements', 34 dictionary : 'dictionary elements', 35 external_byte : 'external byte elements', 36 external_unsigned_byte : 'external unsigned byte elements', 37 external_short : 'external short elements', 38 external_unsigned_short : 'external unsigned short elements', 39 external_int : 'external int elements', 40 external_unsigned_int : 'external unsigned int elements', 41 external_float : 'external float elements', 42 external_double : 'external double elements', 43 external_pixel : 'external pixel elements' 44 } 45 46 function getKind(obj) { 47 if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only; 48 if (%HasFastObjectElements(obj)) return elements_kind.fast; 49 if (%HasFastDoubleElements(obj)) return elements_kind.fast_double; 50 if (%HasDictionaryElements(obj)) return elements_kind.dictionary; 51 } 52 53 function isHoley(obj) { 54 if (%HasFastHoleyElements(obj)) return true; 55 return false; 56 } 57 58 function assertKind(expected, obj, name_opt) { 59 assertEquals(expected, getKind(obj), name_opt); 60 } 61 62 // Verify that basic elements kind feedback works for non-constructor 63 // array calls (as long as the call is made through an IC, and not 64 // a CallStub). 65 (function (){ 66 function create0() { 67 return Array(); 68 } 69 70 // Calls through ICs need warm up through uninitialized, then 71 // premonomorphic first. 72 create0(); 73 a = create0(); 74 assertKind(elements_kind.fast_smi_only, a); 75 a[0] = 3.5; 76 b = create0(); 77 assertKind(elements_kind.fast_double, b); 78 79 function create1(arg) { 80 return Array(arg); 81 } 82 83 create1(0); 84 create1(0); 85 a = create1(0); 86 assertFalse(isHoley(a)); 87 assertKind(elements_kind.fast_smi_only, a); 88 a[0] = "hello"; 89 b = create1(10); 90 assertTrue(isHoley(b)); 91 assertKind(elements_kind.fast, b); 92 93 a = create1(100000); 94 assertKind(elements_kind.fast, a); 95 96 function create3(arg1, arg2, arg3) { 97 return Array(arg1, arg2, arg3); 98 } 99 100 create3(1,2,3); 101 create3(1,2,3); 102 a = create3(1,2,3); 103 a[0] = 3.035; 104 assertKind(elements_kind.fast_double, a); 105 b = create3(1,2,3); 106 assertKind(elements_kind.fast_double, b); 107 assertFalse(isHoley(b)); 108 })(); 109 110 111 // Verify that keyed calls work 112 (function (){ 113 function create0(name) { 114 return this[name](); 115 } 116 117 name = "Array"; 118 create0(name); 119 create0(name); 120 a = create0(name); 121 a[0] = 3.5; 122 b = create0(name); 123 assertKind(elements_kind.fast_double, b); 124 })(); 125 126 127 // Verify that feedback is turned off if the call site goes megamorphic. 128 (function (){ 129 function foo(arg) { return arg(); } 130 foo(Array); 131 foo(function() {}); 132 foo(Array); 133 134 gc(); 135 136 a = foo(Array); 137 a[0] = 3.5; 138 b = foo(Array); 139 // b doesn't benefit from elements kind feedback at a megamorphic site. 140 assertKind(elements_kind.fast_smi_only, b); 141 })(); 142 143 144 // Verify that crankshaft consumes type feedback. 145 (function (){ 146 function create0() { 147 return Array(); 148 } 149 150 create0(); 151 create0(); 152 a = create0(); 153 a[0] = 3.5; 154 %OptimizeFunctionOnNextCall(create0); 155 create0(); 156 create0(); 157 b = create0(); 158 assertKind(elements_kind.fast_double, b); 159 assertOptimized(create0); 160 161 function create1(arg) { 162 return Array(arg); 163 } 164 165 create1(8); 166 create1(8); 167 a = create1(8); 168 a[0] = 3.5; 169 %OptimizeFunctionOnNextCall(create1); 170 b = create1(8); 171 assertKind(elements_kind.fast_double, b); 172 assertOptimized(create1); 173 174 function createN(arg1, arg2, arg3) { 175 return Array(arg1, arg2, arg3); 176 } 177 178 createN(1, 2, 3); 179 createN(1, 2, 3); 180 a = createN(1, 2, 3); 181 a[0] = 3.5; 182 %OptimizeFunctionOnNextCall(createN); 183 b = createN(1, 2, 3); 184 assertKind(elements_kind.fast_double, b); 185 assertOptimized(createN); 186 })(); 187 188 // Verify that cross context calls work 189 (function (){ 190 var realmA = Realm.current(); 191 var realmB = Realm.create(); 192 assertEquals(0, realmA); 193 assertEquals(1, realmB); 194 195 function instanceof_check(type) { 196 assertTrue(type() instanceof type); 197 assertTrue(type(5) instanceof type); 198 assertTrue(type(1,2,3) instanceof type); 199 } 200 201 var realmBArray = Realm.eval(realmB, "Array"); 202 instanceof_check(Array); 203 instanceof_check(Array); 204 instanceof_check(Array); 205 instanceof_check(realmBArray); 206 instanceof_check(realmBArray); 207 instanceof_check(realmBArray); 208 })(); 209
