Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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 |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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); |
Ben Murdoch | 4a90d5f | 2016-03-22 12:00:34 +0000 | [diff] [blame^] | 94 | assertKind(elements_kind.fast, a); |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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 | })(); |