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 --expose-gc 29 // Flags: --noalways-opt 30 31 // Test element kind of objects. 32 // Since --smi-only-arrays affects builtins, its default setting at compile 33 // time sticks if built with snapshot. If --smi-only-arrays is deactivated 34 // by default, only a no-snapshot build actually has smi-only arrays enabled 35 // in this test case. Depending on whether smi-only arrays are actually 36 // enabled, this test takes the appropriate code path to check smi-only arrays. 37 38 // support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8)); 39 support_smi_only_arrays = true; 40 41 if (support_smi_only_arrays) { 42 print("Tests include smi-only arrays."); 43 } else { 44 print("Tests do NOT include smi-only arrays."); 45 } 46 47 var elements_kind = { 48 fast_smi_only : 'fast smi only elements', 49 fast : 'fast elements', 50 fast_double : 'fast double elements', 51 dictionary : 'dictionary elements', 52 external_byte : 'external byte elements', 53 external_unsigned_byte : 'external unsigned byte elements', 54 external_short : 'external short elements', 55 external_unsigned_short : 'external unsigned short elements', 56 external_int : 'external int elements', 57 external_unsigned_int : 'external unsigned int elements', 58 external_float : 'external float elements', 59 external_double : 'external double elements', 60 external_pixel : 'external pixel elements' 61 } 62 63 function getKind(obj) { 64 if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only; 65 if (%HasFastObjectElements(obj)) return elements_kind.fast; 66 if (%HasFastDoubleElements(obj)) return elements_kind.fast_double; 67 if (%HasDictionaryElements(obj)) return elements_kind.dictionary; 68 } 69 70 function isHoley(obj) { 71 if (%HasFastHoleyElements(obj)) return true; 72 return false; 73 } 74 75 function assertKind(expected, obj, name_opt) { 76 if (!support_smi_only_arrays && 77 expected == elements_kind.fast_smi_only) { 78 expected = elements_kind.fast; 79 } 80 assertEquals(expected, getKind(obj), name_opt); 81 } 82 83 if (support_smi_only_arrays) { 84 85 // Verify that basic elements kind feedback works for non-constructor 86 // array calls (as long as the call is made through an IC, and not 87 // a CallStub). 88 (function (){ 89 function create0() { 90 return Array(); 91 } 92 93 // Calls through ICs need warm up through uninitialized, then 94 // premonomorphic first. 95 create0(); 96 a = create0(); 97 assertKind(elements_kind.fast_smi_only, a); 98 a[0] = 3.5; 99 b = create0(); 100 assertKind(elements_kind.fast_double, b); 101 102 function create1(arg) { 103 return Array(arg); 104 } 105 106 create1(0); 107 create1(0); 108 a = create1(0); 109 assertFalse(isHoley(a)); 110 assertKind(elements_kind.fast_smi_only, a); 111 a[0] = "hello"; 112 b = create1(10); 113 assertTrue(isHoley(b)); 114 assertKind(elements_kind.fast, b); 115 116 a = create1(100000); 117 assertKind(elements_kind.dictionary, a); 118 119 function create3(arg1, arg2, arg3) { 120 return Array(arg1, arg2, arg3); 121 } 122 123 create3(1,2,3); 124 create3(1,2,3); 125 a = create3(1,2,3); 126 a[0] = 3.035; 127 assertKind(elements_kind.fast_double, a); 128 b = create3(1,2,3); 129 assertKind(elements_kind.fast_double, b); 130 assertFalse(isHoley(b)); 131 })(); 132 133 134 // Verify that keyed calls work 135 (function (){ 136 function create0(name) { 137 return this[name](); 138 } 139 140 name = "Array"; 141 create0(name); 142 create0(name); 143 a = create0(name); 144 a[0] = 3.5; 145 b = create0(name); 146 assertKind(elements_kind.fast_double, b); 147 })(); 148 149 150 // Verify that feedback is turned off if the call site goes megamorphic. 151 (function (){ 152 function foo(arg) { return arg(); } 153 foo(Array); 154 foo(function() {}); 155 foo(Array); 156 157 gc(); 158 159 a = foo(Array); 160 a[0] = 3.5; 161 b = foo(Array); 162 // b doesn't benefit from elements kind feedback at a megamorphic site. 163 assertKind(elements_kind.fast_smi_only, b); 164 })(); 165 166 167 // Verify that crankshaft consumes type feedback. 168 (function (){ 169 function create0() { 170 return Array(); 171 } 172 173 create0(); 174 create0(); 175 a = create0(); 176 a[0] = 3.5; 177 %OptimizeFunctionOnNextCall(create0); 178 create0(); 179 create0(); 180 b = create0(); 181 assertKind(elements_kind.fast_double, b); 182 assertOptimized(create0); 183 184 function create1(arg) { 185 return Array(arg); 186 } 187 188 create1(8); 189 create1(8); 190 a = create1(8); 191 a[0] = 3.5; 192 %OptimizeFunctionOnNextCall(create1); 193 b = create1(8); 194 assertKind(elements_kind.fast_double, b); 195 assertOptimized(create1); 196 197 function createN(arg1, arg2, arg3) { 198 return Array(arg1, arg2, arg3); 199 } 200 201 createN(1, 2, 3); 202 createN(1, 2, 3); 203 a = createN(1, 2, 3); 204 a[0] = 3.5; 205 %OptimizeFunctionOnNextCall(createN); 206 b = createN(1, 2, 3); 207 assertKind(elements_kind.fast_double, b); 208 assertOptimized(createN); 209 })(); 210 211 // Verify that cross context calls work 212 (function (){ 213 var realmA = Realm.current(); 214 var realmB = Realm.create(); 215 assertEquals(0, realmA); 216 assertEquals(1, realmB); 217 218 function instanceof_check(type) { 219 assertTrue(type() instanceof type); 220 assertTrue(type(5) instanceof type); 221 assertTrue(type(1,2,3) instanceof type); 222 } 223 224 var realmBArray = Realm.eval(realmB, "Array"); 225 instanceof_check(Array); 226 instanceof_check(Array); 227 instanceof_check(Array); 228 instanceof_check(realmBArray); 229 instanceof_check(realmBArray); 230 instanceof_check(realmBArray); 231 })(); 232 } 233
