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 --smi-only-arrays --expose-gc --nostress-opt
30 // Test element kind of objects.
31 // Since --smi-only-arrays affects builtins, its default setting at compile
32 // time sticks if built with snapshot. If --smi-only-arrays is deactivated
33 // by default, only a no-snapshot build actually has smi-only arrays enabled
34 // in this test case. Depending on whether smi-only arrays are actually
35 // enabled, this test takes the appropriate code path to check smi-only arrays.
37 support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
39 if (support_smi_only_arrays) {
40 print("Tests include smi-only arrays.");
42 print("Tests do NOT include smi-only arrays.");
46 fast_smi_only : 'fast smi only elements',
47 fast : 'fast elements',
48 fast_double : 'fast double elements',
49 dictionary : 'dictionary elements',
50 external_byte : 'external byte elements',
51 external_unsigned_byte : 'external unsigned byte elements',
52 external_short : 'external short elements',
53 external_unsigned_short : 'external unsigned short elements',
54 external_int : 'external int elements',
55 external_unsigned_int : 'external unsigned int elements',
56 external_float : 'external float elements',
57 external_double : 'external double elements',
58 external_pixel : 'external pixel elements'
61 function getKind(obj) {
62 if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only;
63 if (%HasFastObjectElements(obj)) return elements_kind.fast;
64 if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
65 if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
66 // Every external kind is also an external array.
67 assertTrue(%HasExternalArrayElements(obj));
68 if (%HasExternalInt8Elements(obj)) {
69 return elements_kind.external_byte;
71 if (%HasExternalUint8Elements(obj)) {
72 return elements_kind.external_unsigned_byte;
74 if (%HasExternalInt16Elements(obj)) {
75 return elements_kind.external_short;
77 if (%HasExternalUint16Elements(obj)) {
78 return elements_kind.external_unsigned_short;
80 if (%HasExternalInt32Elements(obj)) {
81 return elements_kind.external_int;
83 if (%HasExternalUint32Elements(obj)) {
84 return elements_kind.external_unsigned_int;
86 if (%HasExternalFloat32Elements(obj)) {
87 return elements_kind.external_float;
89 if (%HasExternalFloat64Elements(obj)) {
90 return elements_kind.external_double;
92 if (%HasExternalUint8ClampedElements(obj)) {
93 return elements_kind.external_pixel;
97 function assertKind(expected, obj, name_opt) {
98 if (!support_smi_only_arrays &&
99 expected == elements_kind.fast_smi_only) {
100 expected = elements_kind.fast;
102 assertEquals(expected, getKind(obj), name_opt);
106 assertKind(elements_kind.fast, me);
109 assertKind(elements_kind.fast, me);
111 if (support_smi_only_arrays) {
113 assertKind(elements_kind.fast_smi_only, too);
116 assertKind(elements_kind.fast_smi_only, too);
119 // Make sure the element kind transitions from smi when a non-smi is stored.
120 function test_wrapper() {
121 var you = new Array();
122 assertKind(elements_kind.fast_smi_only, you);
123 for (var i = 0; i < 1337; i++) {
126 assertKind(elements_kind.fast_smi_only, you);
131 assertKind(elements_kind.fast, you);
133 assertKind(elements_kind.dictionary, new Array(0xDECAF));
135 var fast_double_array = new Array(0xDECAF);
136 for (var i = 0; i < 0xDECAF; i++) fast_double_array[i] = i / 2;
137 assertKind(elements_kind.fast_double, fast_double_array);
139 assertKind(elements_kind.external_byte, new Int8Array(9001));
140 assertKind(elements_kind.external_unsigned_byte, new Uint8Array(007));
141 assertKind(elements_kind.external_short, new Int16Array(666));
142 assertKind(elements_kind.external_unsigned_short, new Uint16Array(42));
143 assertKind(elements_kind.external_int, new Int32Array(0xF));
144 assertKind(elements_kind.external_unsigned_int, new Uint32Array(23));
145 assertKind(elements_kind.external_float, new Float32Array(7));
146 assertKind(elements_kind.external_double, new Float64Array(0));
147 assertKind(elements_kind.external_pixel, new Uint8ClampedArray(512));
149 // Crankshaft support for smi-only array elements.
150 function monomorphic(array) {
151 assertKind(elements_kind.fast_smi_only, array);
152 for (var i = 0; i < 3; i++) {
155 assertKind(elements_kind.fast_smi_only, array);
156 for (var i = 0; i < 3; i++) {
158 assertEquals(i + 10, a);
161 var smi_only = new Array(1, 2, 3);
162 assertKind(elements_kind.fast_smi_only, smi_only);
163 for (var i = 0; i < 3; i++) monomorphic(smi_only);
164 %OptimizeFunctionOnNextCall(monomorphic);
165 monomorphic(smi_only);
168 // The test is called in a wrapper function to eliminate the transition learning
169 // feedback of AllocationSites.
171 %ClearFunctionTypeFeedback(test_wrapper);
173 if (support_smi_only_arrays) {
174 %NeverOptimizeFunction(construct_smis);
176 // This code exists to eliminate the learning influence of AllocationSites
177 // on the following tests.
179 function make_array_string() {
180 this.__sequence = this.__sequence + 1;
181 return "/* " + this.__sequence + " */ [0, 0, 0];"
183 function make_array() {
184 return eval(make_array_string());
187 function construct_smis() {
188 var a = make_array();
189 a[0] = 0; // Send the COW array map to the steak house.
190 assertKind(elements_kind.fast_smi_only, a);
193 %NeverOptimizeFunction(construct_doubles);
194 function construct_doubles() {
195 var a = construct_smis();
197 assertKind(elements_kind.fast_double, a);
200 %NeverOptimizeFunction(construct_objects);
201 function construct_objects() {
202 var a = construct_smis();
204 assertKind(elements_kind.fast, a);
208 // Test crankshafted transition SMI->DOUBLE.
209 %NeverOptimizeFunction(convert_to_double);
210 function convert_to_double(array) {
212 assertKind(elements_kind.fast_double, array);
213 assertEquals(2.5, array[1]);
215 var smis = construct_smis();
216 for (var i = 0; i < 3; i++) convert_to_double(smis);
217 %OptimizeFunctionOnNextCall(convert_to_double);
218 smis = construct_smis();
219 convert_to_double(smis);
220 // Test crankshafted transitions SMI->FAST and DOUBLE->FAST.
221 %NeverOptimizeFunction(convert_to_fast);
222 function convert_to_fast(array) {
224 assertKind(elements_kind.fast, array);
225 assertEquals("two", array[1]);
227 smis = construct_smis();
228 for (var i = 0; i < 3; i++) convert_to_fast(smis);
229 var doubles = construct_doubles();
230 for (var i = 0; i < 3; i++) convert_to_fast(doubles);
231 smis = construct_smis();
232 doubles = construct_doubles();
233 %OptimizeFunctionOnNextCall(convert_to_fast);
234 convert_to_fast(smis);
235 convert_to_fast(doubles);
236 // Test transition chain SMI->DOUBLE->FAST (crankshafted function will
237 // transition to FAST directly).
238 %NeverOptimizeFunction(convert_mixed);
239 function convert_mixed(array, value, kind) {
241 assertKind(kind, array);
242 assertEquals(value, array[1]);
244 smis = construct_smis();
245 for (var i = 0; i < 3; i++) {
246 convert_mixed(smis, 1.5, elements_kind.fast_double);
248 doubles = construct_doubles();
249 for (var i = 0; i < 3; i++) {
250 convert_mixed(doubles, "three", elements_kind.fast);
252 convert_mixed(construct_smis(), "three", elements_kind.fast);
253 convert_mixed(construct_doubles(), "three", elements_kind.fast);
254 %OptimizeFunctionOnNextCall(convert_mixed);
255 smis = construct_smis();
256 doubles = construct_doubles();
257 convert_mixed(smis, 1, elements_kind.fast);
258 convert_mixed(doubles, 1, elements_kind.fast);
259 assertTrue(%HaveSameMap(smis, doubles));
262 // Crankshaft support for smi-only elements in dynamic array literals.
263 function get(foo) { return foo; } // Used to generate dynamic values.
265 function crankshaft_test() {
266 if (support_smi_only_arrays) {
267 var a1 = [get(1), get(2), get(3)];
268 assertKind(elements_kind.fast_smi_only, a1);
270 var a2 = new Array(get(1), get(2), get(3));
271 assertKind(elements_kind.fast_smi_only, a2);
272 var b = [get(1), get(2), get("three")];
273 assertKind(elements_kind.fast, b);
274 var c = [get(1), get(2), get(3.5)];
275 if (support_smi_only_arrays) {
276 assertKind(elements_kind.fast_double, c);
279 for (var i = 0; i < 3; i++) {
282 %OptimizeFunctionOnNextCall(crankshaft_test);
285 // Elements_kind transitions for arrays.
287 // A map can have three different elements_kind transitions: SMI->DOUBLE,
288 // DOUBLE->OBJECT, and SMI->OBJECT. No matter in which order these three are
289 // created, they must always end up with the same FAST map.
291 // This test is meaningless without FAST_SMI_ONLY_ELEMENTS.
292 if (support_smi_only_arrays) {
293 // Preparation: create one pair of identical objects for each case.
296 assertTrue(%HaveSameMap(a, b));
297 assertKind(elements_kind.fast_smi_only, a);
302 assertTrue(%HaveSameMap(c, d));
303 assertFalse(%HaveSameMap(a, c));
304 assertKind(elements_kind.fast_smi_only, c);
309 assertTrue(%HaveSameMap(e, f));
310 assertFalse(%HaveSameMap(a, e));
311 assertFalse(%HaveSameMap(c, e));
312 assertKind(elements_kind.fast_smi_only, e);
313 // Case 1: SMI->DOUBLE, DOUBLE->OBJECT, SMI->OBJECT.
315 assertKind(elements_kind.fast_double, a);
317 assertKind(elements_kind.fast, a);
319 assertTrue(%HaveSameMap(a, b));
320 // Case 2: SMI->DOUBLE, SMI->OBJECT, DOUBLE->OBJECT.
322 assertKind(elements_kind.fast_double, c);
323 assertFalse(%HaveSameMap(c, d));
325 assertKind(elements_kind.fast, d);
326 assertFalse(%HaveSameMap(c, d));
328 assertTrue(%HaveSameMap(c, d));
329 // Case 3: SMI->OBJECT, SMI->DOUBLE, DOUBLE->OBJECT.
331 assertKind(elements_kind.fast, e);
332 assertFalse(%HaveSameMap(e, f));
334 assertKind(elements_kind.fast_double, f);
335 assertFalse(%HaveSameMap(e, f));
337 assertKind(elements_kind.fast, f);
338 assertTrue(%HaveSameMap(e, f));
341 // Test if Array.concat() works correctly with DOUBLE elements.
342 if (support_smi_only_arrays) {
344 assertKind(elements_kind.fast_smi_only, a);
346 assertKind(elements_kind.fast_double, b);
348 assertEquals([1, 2, 4.5, 5.5], c);
349 assertKind(elements_kind.fast_double, c);
352 // Test that Array.push() correctly handles SMI elements.
353 if (support_smi_only_arrays) {
355 assertKind(elements_kind.fast_smi_only, a);
357 assertKind(elements_kind.fast_smi_only, a);
358 assertEquals([1, 2, 3, 4, 5], a);
361 // Test that Array.splice() and Array.slice() return correct ElementsKinds.
362 if (support_smi_only_arrays) {
363 var a = ["foo", "bar"];
364 assertKind(elements_kind.fast, a);
365 var b = a.splice(0, 1);
366 assertKind(elements_kind.fast, b);
367 var c = a.slice(0, 1);
368 assertKind(elements_kind.fast, c);
371 // Throw away type information in the ICs for next stress run.