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 --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 fixed_int32 : 'fixed int8 elements', 41 fixed_uint8 : 'fixed uint8 elements', 42 fixed_int16 : 'fixed int16 elements', 43 fixed_uint16 : 'fixed uint16 elements', 44 fixed_int32 : 'fixed int32 elements', 45 fixed_uint32 : 'fixed uint32 elements', 46 fixed_float32 : 'fixed float32 elements', 47 fixed_float64 : 'fixed float64 elements', 48 fixed_uint8_clamped : 'fixed uint8_clamped 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 57 if (%HasFixedInt8Elements(obj)) { 58 return elements_kind.fixed_int8; 59 } 60 if (%HasFixedUint8Elements(obj)) { 61 return elements_kind.fixed_uint8; 62 } 63 if (%HasFixedInt16Elements(obj)) { 64 return elements_kind.fixed_int16; 65 } 66 if (%HasFixedUint16Elements(obj)) { 67 return elements_kind.fixed_uint16; 68 } 69 if (%HasFixedInt32Elements(obj)) { 70 return elements_kind.fixed_int32; 71 } 72 if (%HasFixedUint32Elements(obj)) { 73 return elements_kind.fixed_uint32; 74 } 75 if (%HasFixedFloat32Elements(obj)) { 76 return elements_kind.fixed_float32; 77 } 78 if (%HasFixedFloat64Elements(obj)) { 79 return elements_kind.fixed_float64; 80 } 81 if (%HasFixedUint8ClampedElements(obj)) { 82 return elements_kind.fixed_uint8_clamped; 83 } 84 } 85 86 function assertKind(expected, obj, name_opt) { 87 assertEquals(expected, getKind(obj), name_opt); 88 } 89 90 %NeverOptimizeFunction(construct_smis); 91 92 // This code exists to eliminate the learning influence of AllocationSites 93 // on the following tests. 94 var __sequence = 0; 95 function make_array_string() { 96 this.__sequence = this.__sequence + 1; 97 return "/* " + this.__sequence + " */ [0, 0, 0];" 98 } 99 function make_array() { 100 return eval(make_array_string()); 101 } 102 103 function construct_smis() { 104 var a = make_array(); 105 a[0] = 0; // Send the COW array map to the steak house. 106 assertKind(elements_kind.fast_smi_only, a); 107 return a; 108 } 109 110 %NeverOptimizeFunction(construct_doubles); 111 function construct_doubles() { 112 var a = construct_smis(); 113 a[0] = 1.5; 114 assertKind(elements_kind.fast_double, a); 115 return a; 116 } 117 118 %NeverOptimizeFunction(convert_mixed); 119 function convert_mixed(array, value, kind) { 120 array[1] = value; 121 assertKind(kind, array); 122 assertEquals(value, array[1]); 123 } 124 125 function test1() { 126 // Test transition chain SMI->DOUBLE->FAST (crankshafted function will 127 // transition to FAST directly). 128 var smis = construct_smis(); 129 convert_mixed(smis, 1.5, elements_kind.fast_double); 130 131 var 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 } 143 144 function clear_ic_state() { 145 %ClearFunctionTypeFeedback(construct_smis); 146 %ClearFunctionTypeFeedback(construct_doubles); 147 %ClearFunctionTypeFeedback(convert_mixed); 148 } 149 150 test1(); 151 clear_ic_state(); 152 test1(); 153 clear_ic_state(); 154 %OptimizeFunctionOnNextCall(test1); 155 test1(); 156 clear_ic_state(); 157
