1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
// Copyright 2012 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Flags: --allow-natives-syntax --expose-gc
// Flags: --no-always-opt --crankshaft
// Test element kind of objects.
var elements_kind = {
fast_smi_only : 'fast smi only elements',
fast : 'fast elements',
fast_double : 'fast double elements',
dictionary : 'dictionary elements',
external_byte : 'external byte elements',
external_unsigned_byte : 'external unsigned byte elements',
external_short : 'external short elements',
external_unsigned_short : 'external unsigned short elements',
external_int : 'external int elements',
external_unsigned_int : 'external unsigned int elements',
external_float : 'external float elements',
external_double : 'external double elements',
external_pixel : 'external pixel elements'
}
function getKind(obj) {
if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only;
if (%HasFastObjectElements(obj)) return elements_kind.fast;
if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
}
function isHoley(obj) {
if (%HasFastHoleyElements(obj)) return true;
return false;
}
function assertKind(expected, obj, name_opt) {
assertEquals(expected, getKind(obj), name_opt);
}
// Test: ensure that crankshafted array constructor sites are deopted
// if another function is used.
(function() {
function bar0(t) {
return new t();
}
a = bar0(Array);
a[0] = 3.5;
b = bar0(Array);
assertKind(elements_kind.fast_double, b);
%OptimizeFunctionOnNextCall(bar0);
b = bar0(Array);
assertKind(elements_kind.fast_double, b);
assertOptimized(bar0);
// bar0 should deopt
b = bar0(Object);
assertUnoptimized(bar0)
// When it's re-optimized, we should call through the full stub
bar0(Array);
%OptimizeFunctionOnNextCall(bar0);
b = bar0(Array);
// We also lost our ability to record kind feedback, as the site
// is megamorphic now.
assertKind(elements_kind.fast_smi_only, b);
assertOptimized(bar0);
b[0] = 3.5;
c = bar0(Array);
assertKind(elements_kind.fast_smi_only, c);
})();
// Test: Ensure that inlined array calls in crankshaft learn from deopts
// based on the move to a dictionary for the array.
(function() {
function bar(len) {
return new Array(len);
}
a = bar(10);
a[0] = "a string";
a = bar(10);
assertKind(elements_kind.fast, a);
%OptimizeFunctionOnNextCall(bar);
a = bar(10);
assertKind(elements_kind.fast, a);
assertOptimized(bar);
bar(100000);
assertOptimized(bar);
// If the argument isn't a smi, things should still work.
a = bar("oops");
assertOptimized(bar);
assertKind(elements_kind.fast, a);
function barn(one, two, three) {
return new Array(one, two, three);
}
barn(1, 2, 3);
barn(1, 2, 3);
%OptimizeFunctionOnNextCall(barn);
barn(1, 2, 3);
assertOptimized(barn);
a = barn(1, "oops", 3);
assertOptimized(barn);
})();
// Test: When a method with array constructor is crankshafted, the type
// feedback for elements kind is baked in. Verify that transitions don't
// change it anymore
(function() {
function bar() {
return new Array();
}
a = bar();
bar();
%OptimizeFunctionOnNextCall(bar);
b = bar();
assertOptimized(bar);
%DebugPrint(3);
b[0] = 3.5;
c = bar();
assertKind(elements_kind.fast_smi_only, c);
assertOptimized(bar);
})();
// Test: create arrays in two contexts, verifying that the correct
// map for Array in that context will be used.
(function() {
function bar() { return new Array(); }
bar();
bar();
%OptimizeFunctionOnNextCall(bar);
a = bar();
assertTrue(a instanceof Array);
var contextB = Realm.create();
Realm.eval(contextB, "function bar2() { return new Array(); };");
Realm.eval(contextB, "bar2(); bar2();");
Realm.eval(contextB, "%OptimizeFunctionOnNextCall(bar2);");
Realm.eval(contextB, "bar2();");
assertFalse(Realm.eval(contextB, "bar2();") instanceof Array);
assertTrue(Realm.eval(contextB, "bar2() instanceof Array"));
})();
// Test: create array with packed feedback, then optimize function, which
// should deal with arguments that create holey arrays.
(function() {
function bar(len) { return new Array(len); }
bar(0);
bar(0);
%OptimizeFunctionOnNextCall(bar);
a = bar(0);
assertOptimized(bar);
assertFalse(isHoley(a));
a = bar(1); // ouch!
assertOptimized(bar);
assertTrue(isHoley(a));
a = bar(100);
assertTrue(isHoley(a));
a = bar(0);
assertOptimized(bar);
// Crankshafted functions don't use mementos, so feedback still
// indicates a packed array is desired.
assertFalse(isHoley(a));
})();
// Test: Make sure that crankshaft continues with feedback for large arrays.
(function() {
function bar(len) { return new Array(len); }
var size = 100001;
// Perform a gc, because we are allocating a very large array and if a gc
// happens during the allocation we could lose our memento.
gc();
bar(size)[0] = 'string';
var res = bar(size);
assertKind(elements_kind.fast, bar(size));
%OptimizeFunctionOnNextCall(bar);
assertKind(elements_kind.fast, bar(size));
// But there is a limit, based on the size of the old generation, currently
// 22937600, but double it to prevent the test being too brittle.
var large_size = 22937600 * 2;
assertKind(elements_kind.dictionary, bar(large_size));
})();
|
