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 // 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 var elements_kind = { 36 fast_smi_only : 'fast smi only elements', 37 fast : 'fast elements', 38 fast_double : 'fast double elements', 39 dictionary : 'dictionary elements', 40 external_byte : 'external byte elements', 41 external_unsigned_byte : 'external unsigned byte elements', 42 external_short : 'external short elements', 43 external_unsigned_short : 'external unsigned short elements', 44 external_int : 'external int elements', 45 external_unsigned_int : 'external unsigned int elements', 46 external_float : 'external float elements', 47 external_double : 'external double elements', 48 external_pixel : 'external pixel elements' 49 } 50 51 function getKind(obj) { 52 if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only; 53 if (%HasFastObjectElements(obj)) return elements_kind.fast; 54 if (%HasFastDoubleElements(obj)) return elements_kind.fast_double; 55 if (%HasDictionaryElements(obj)) return elements_kind.dictionary; 56 // Every external kind is also an external array. 57 assertTrue(%HasExternalArrayElements(obj)); 58 if (%HasExternalByteElements(obj)) { 59 return elements_kind.external_byte; 60 } 61 if (%HasExternalUnsignedByteElements(obj)) { 62 return elements_kind.external_unsigned_byte; 63 } 64 if (%HasExternalShortElements(obj)) { 65 return elements_kind.external_short; 66 } 67 if (%HasExternalUnsignedShortElements(obj)) { 68 return elements_kind.external_unsigned_short; 69 } 70 if (%HasExternalIntElements(obj)) { 71 return elements_kind.external_int; 72 } 73 if (%HasExternalUnsignedIntElements(obj)) { 74 return elements_kind.external_unsigned_int; 75 } 76 if (%HasExternalFloatElements(obj)) { 77 return elements_kind.external_float; 78 } 79 if (%HasExternalDoubleElements(obj)) { 80 return elements_kind.external_double; 81 } 82 if (%HasExternalPixelElements(obj)) { 83 return elements_kind.external_pixel; 84 } 85 } 86 87 function assertKind(expected, obj, name_opt) { 88 assertEquals(expected, getKind(obj), name_opt); 89 } 90 91 // long-running loop forces OSR. 92 %NeverOptimizeFunction(construct_smis); 93 %NeverOptimizeFunction(construct_doubles); 94 %NeverOptimizeFunction(convert_mixed); 95 for (var i = 0; i < 1000000; i++) { } 96 97 // This code exists to eliminate the learning influence of AllocationSites 98 // on the following tests. 99 var __sequence = 0; 100 function make_array_string() { 101 this.__sequence = this.__sequence + 1; 102 return "/* " + this.__sequence + " */ [0, 0, 0];" 103 } 104 function make_array() { 105 return eval(make_array_string()); 106 } 107 108 function construct_smis() { 109 var a = make_array(); 110 a[0] = 0; // Send the COW array map to the steak house. 111 assertKind(elements_kind.fast_smi_only, a); 112 return a; 113 } 114 function construct_doubles() { 115 var a = construct_smis(); 116 a[0] = 1.5; 117 assertKind(elements_kind.fast_double, a); 118 return a; 119 } 120 121 // Test transition chain SMI->DOUBLE->FAST (crankshafted function will 122 // transition to FAST directly). 123 function convert_mixed(array, value, kind) { 124 array[1] = value; 125 assertKind(kind, array); 126 assertEquals(value, array[1]); 127 } 128 smis = construct_smis(); 129 convert_mixed(smis, 1.5, elements_kind.fast_double); 130 131 doubles = construct_doubles(); 132 convert_mixed(doubles, "three", elements_kind.fast); 133 134 convert_mixed(construct_smis(), "three", elements_kind.fast); 135 convert_mixed(construct_doubles(), "three", elements_kind.fast); 136 137 smis = construct_smis(); 138 doubles = construct_doubles(); 139 convert_mixed(smis, 1, elements_kind.fast); 140 convert_mixed(doubles, 1, elements_kind.fast); 141 assertTrue(%HaveSameMap(smis, doubles)); 142 143 // Throw away type information in the ICs for next stress run. 144 gc(); 145
