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
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.
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.
28 // Flags: --allow-natives-syntax --expose-gc
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
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'
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;
61 if (%HasExternalUnsignedByteElements(obj)) {
62 return elements_kind.external_unsigned_byte;
64 if (%HasExternalShortElements(obj)) {
65 return elements_kind.external_short;
67 if (%HasExternalUnsignedShortElements(obj)) {
68 return elements_kind.external_unsigned_short;
70 if (%HasExternalIntElements(obj)) {
71 return elements_kind.external_int;
73 if (%HasExternalUnsignedIntElements(obj)) {
74 return elements_kind.external_unsigned_int;
76 if (%HasExternalFloatElements(obj)) {
77 return elements_kind.external_float;
79 if (%HasExternalDoubleElements(obj)) {
80 return elements_kind.external_double;
82 if (%HasExternalPixelElements(obj)) {
83 return elements_kind.external_pixel;
87 function assertKind(expected, obj, name_opt) {
88 assertEquals(expected, getKind(obj), name_opt);
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++) { }
97 // This code exists to eliminate the learning influence of AllocationSites
98 // on the following tests.
100 function make_array_string() {
101 this.__sequence = this.__sequence + 1;
102 return "/* " + this.__sequence + " */ [0, 0, 0];"
104 function make_array() {
105 return eval(make_array_string());
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);
114 function construct_doubles() {
115 var a = construct_smis();
117 assertKind(elements_kind.fast_double, a);
121 // Test transition chain SMI->DOUBLE->FAST (crankshafted function will
122 // transition to FAST directly).
123 function convert_mixed(array, value, kind) {
125 assertKind(kind, array);
126 assertEquals(value, array[1]);
128 smis = construct_smis();
129 convert_mixed(smis, 1.5, elements_kind.fast_double);
131 doubles = construct_doubles();
132 convert_mixed(doubles, "three", elements_kind.fast);
134 convert_mixed(construct_smis(), "three", elements_kind.fast);
135 convert_mixed(construct_doubles(), "three", elements_kind.fast);
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));
143 // Throw away type information in the ICs for next stress run.