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 --smi-only-arrays --expose-gc
29// Flags: --notrack_allocation_sites
30
31// Limit the number of stress runs to reduce polymorphism it defeats some of the
32// assumptions made about how elements transitions work because transition stubs
33// end up going generic.
34// Flags: --stress-runs=2
35
36// Test element kind of objects.
37// Since --smi-only-arrays affects builtins, its default setting at compile
38// time sticks if built with snapshot.  If --smi-only-arrays is deactivated
39// by default, only a no-snapshot build actually has smi-only arrays enabled
40// in this test case.  Depending on whether smi-only arrays are actually
41// enabled, this test takes the appropriate code path to check smi-only arrays.
42
43support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
44
45if (support_smi_only_arrays) {
46  print("Tests include smi-only arrays.");
47} else {
48  print("Tests do NOT include smi-only arrays.");
49}
50
51var elements_kind = {
52  fast_smi_only            :  'fast smi only elements',
53  fast                     :  'fast elements',
54  fast_double              :  'fast double elements',
55  dictionary               :  'dictionary elements',
56  external_byte            :  'external byte elements',
57  external_unsigned_byte   :  'external unsigned byte elements',
58  external_short           :  'external short elements',
59  external_unsigned_short  :  'external unsigned short elements',
60  external_int             :  'external int elements',
61  external_unsigned_int    :  'external unsigned int elements',
62  external_float           :  'external float elements',
63  external_double          :  'external double elements',
64  external_pixel           :  'external pixel elements'
65}
66
67function getKind(obj) {
68  if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only;
69  if (%HasFastObjectElements(obj)) return elements_kind.fast;
70  if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
71  if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
72  // Every external kind is also an external array.
73  assertTrue(%HasExternalArrayElements(obj));
74  if (%HasExternalByteElements(obj)) {
75    return elements_kind.external_byte;
76  }
77  if (%HasExternalUnsignedByteElements(obj)) {
78    return elements_kind.external_unsigned_byte;
79  }
80  if (%HasExternalShortElements(obj)) {
81    return elements_kind.external_short;
82  }
83  if (%HasExternalUnsignedShortElements(obj)) {
84    return elements_kind.external_unsigned_short;
85  }
86  if (%HasExternalIntElements(obj)) {
87    return elements_kind.external_int;
88  }
89  if (%HasExternalUnsignedIntElements(obj)) {
90    return elements_kind.external_unsigned_int;
91  }
92  if (%HasExternalFloatElements(obj)) {
93    return elements_kind.external_float;
94  }
95  if (%HasExternalDoubleElements(obj)) {
96    return elements_kind.external_double;
97  }
98  if (%HasExternalPixelElements(obj)) {
99    return elements_kind.external_pixel;
100  }
101}
102
103function assertKind(expected, obj, name_opt) {
104  if (!support_smi_only_arrays &&
105      expected == elements_kind.fast_smi_only) {
106    expected = elements_kind.fast;
107  }
108  assertEquals(expected, getKind(obj), name_opt);
109}
110
111%NeverOptimizeFunction(construct_smis);
112function construct_smis() {
113  var a = [0, 0, 0];
114  a[0] = 0;  // Send the COW array map to the steak house.
115  assertKind(elements_kind.fast_smi_only, a);
116  return a;
117}
118
119%NeverOptimizeFunction(construct_doubles);
120function construct_doubles() {
121  var a = construct_smis();
122  a[0] = 1.5;
123  assertKind(elements_kind.fast_double, a);
124  return a;
125}
126
127%NeverOptimizeFunction(convert_mixed);
128function convert_mixed(array, value, kind) {
129  array[1] = value;
130  assertKind(kind, array);
131  assertEquals(value, array[1]);
132}
133
134function test1() {
135  if (!support_smi_only_arrays) return;
136
137  // Test transition chain SMI->DOUBLE->FAST (crankshafted function will
138  // transition to FAST directly).
139  var smis = construct_smis();
140  convert_mixed(smis, 1.5, elements_kind.fast_double);
141
142  var doubles = construct_doubles();
143  convert_mixed(doubles, "three", elements_kind.fast);
144
145  convert_mixed(construct_smis(), "three", elements_kind.fast);
146  convert_mixed(construct_doubles(), "three", elements_kind.fast);
147
148  smis = construct_smis();
149  doubles = construct_doubles();
150  convert_mixed(smis, 1, elements_kind.fast);
151  convert_mixed(doubles, 1, elements_kind.fast);
152  assertTrue(%HaveSameMap(smis, doubles));
153}
154
155test1();
156gc(); // clear IC state
157test1();
158gc(); // clear IC state
159%OptimizeFunctionOnNextCall(test1);
160test1();
161gc(); // clear IC state
162