00a5287d2f
Review URL: http://codereview.chromium.org/8261007 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9608 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
283 lines
10 KiB
JavaScript
283 lines
10 KiB
JavaScript
// Copyright 2011 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// Flags: --allow-natives-syntax --smi-only-arrays --expose-gc
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// Test element kind of objects.
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// Since --smi-only-arrays affects builtins, its default setting at compile
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// time sticks if built with snapshot. If --smi-only-arrays is deactivated
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// by default, only a no-snapshot build actually has smi-only arrays enabled
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// in this test case. Depending on whether smi-only arrays are actually
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// enabled, this test takes the appropriate code path to check smi-only arrays.
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support_smi_only_arrays = %HasFastSmiOnlyElements([]);
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if (support_smi_only_arrays) {
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print("Tests include smi-only arrays.");
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} else {
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print("Tests do NOT include smi-only arrays.");
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}
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var elements_kind = {
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fast_smi_only : 'fast smi only elements',
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fast : 'fast elements',
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fast_double : 'fast double elements',
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dictionary : 'dictionary elements',
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external_byte : 'external byte elements',
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external_unsigned_byte : 'external unsigned byte elements',
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external_short : 'external short elements',
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external_unsigned_short : 'external unsigned short elements',
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external_int : 'external int elements',
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external_unsigned_int : 'external unsigned int elements',
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external_float : 'external float elements',
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external_double : 'external double elements',
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external_pixel : 'external pixel elements'
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}
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function getKind(obj) {
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if (%HasFastSmiOnlyElements(obj)) return elements_kind.fast_smi_only;
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if (%HasFastElements(obj)) return elements_kind.fast;
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if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
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if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
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// Every external kind is also an external array.
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assertTrue(%HasExternalArrayElements(obj));
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if (%HasExternalByteElements(obj)) {
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return elements_kind.external_byte;
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}
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if (%HasExternalUnsignedByteElements(obj)) {
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return elements_kind.external_unsigned_byte;
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}
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if (%HasExternalShortElements(obj)) {
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return elements_kind.external_short;
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}
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if (%HasExternalUnsignedShortElements(obj)) {
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return elements_kind.external_unsigned_short;
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}
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if (%HasExternalIntElements(obj)) {
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return elements_kind.external_int;
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}
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if (%HasExternalUnsignedIntElements(obj)) {
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return elements_kind.external_unsigned_int;
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}
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if (%HasExternalFloatElements(obj)) {
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return elements_kind.external_float;
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}
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if (%HasExternalDoubleElements(obj)) {
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return elements_kind.external_double;
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}
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if (%HasExternalPixelElements(obj)) {
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return elements_kind.external_pixel;
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}
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}
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function assertKind(expected, obj, name_opt) {
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if (!support_smi_only_arrays &&
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expected == elements_kind.fast_smi_only) {
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expected = elements_kind.fast;
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}
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assertEquals(expected, getKind(obj), name_opt);
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}
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var me = {};
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assertKind(elements_kind.fast, me);
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me.dance = 0xD15C0;
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me.drink = 0xC0C0A;
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assertKind(elements_kind.fast, me);
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var too = [1,2,3];
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assertKind(elements_kind.fast_smi_only, too);
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too.dance = 0xD15C0;
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too.drink = 0xC0C0A;
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assertKind(elements_kind.fast_smi_only, too);
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// Make sure the element kind transitions from smionly when a non-smi is stored.
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var you = new Array();
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assertKind(elements_kind.fast_smi_only, you);
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for (var i = 0; i < 1337; i++) {
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var val = i;
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if (i == 1336) {
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assertKind(elements_kind.fast_smi_only, you);
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val = new Object();
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}
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you[i] = val;
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}
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assertKind(elements_kind.fast, you);
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assertKind(elements_kind.dictionary, new Array(0xDECAF));
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var fast_double_array = new Array(0xDECAF);
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for (var i = 0; i < 0xDECAF; i++) fast_double_array[i] = i / 2;
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assertKind(elements_kind.fast_double, fast_double_array);
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assertKind(elements_kind.external_byte, new Int8Array(9001));
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assertKind(elements_kind.external_unsigned_byte, new Uint8Array(007));
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assertKind(elements_kind.external_short, new Int16Array(666));
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assertKind(elements_kind.external_unsigned_short, new Uint16Array(42));
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assertKind(elements_kind.external_int, new Int32Array(0xF));
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assertKind(elements_kind.external_unsigned_int, new Uint32Array(23));
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assertKind(elements_kind.external_float, new Float32Array(7));
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assertKind(elements_kind.external_double, new Float64Array(0));
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assertKind(elements_kind.external_pixel, new PixelArray(512));
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// Crankshaft support for smi-only array elements.
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function monomorphic(array) {
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for (var i = 0; i < 3; i++) {
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array[i] = i + 10;
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}
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assertKind(elements_kind.fast_smi_only, array);
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for (var i = 0; i < 3; i++) {
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var a = array[i];
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assertEquals(i + 10, a);
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}
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}
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var smi_only = [1, 2, 3];
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for (var i = 0; i < 3; i++) monomorphic(smi_only);
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%OptimizeFunctionOnNextCall(monomorphic);
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monomorphic(smi_only);
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function polymorphic(array, expected_kind) {
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array[1] = 42;
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assertKind(expected_kind, array);
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var a = array[1];
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assertEquals(42, a);
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}
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var smis = [1, 2, 3];
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var strings = [0, 0, 0]; strings[0] = "one";
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var doubles = [0, 0, 0]; doubles[0] = 1.5;
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assertKind(support_smi_only_arrays
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? elements_kind.fast_double
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: elements_kind.fast,
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doubles);
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for (var i = 0; i < 3; i++) {
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polymorphic(smis, elements_kind.fast_smi_only);
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}
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for (var i = 0; i < 3; i++) {
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polymorphic(strings, elements_kind.fast);
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}
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/* In the first iteration, feeding polymorphic with a fast double elements
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* array leads to a miss and is then routed to runtime code. No conversion
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* is done in there. The second time the store is handled by the newly
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* created IC, which converts the fast double elements into fast elements
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* since arrays with fast elements have been handled earlier in polymorphic.
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* Since the x64 and arm port of the generated code conversion does not yet
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* exist, this test is skipped for now.
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for (var i = 0; i < 3; i++) {
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polymorphic(doubles, i == 0 && support_smi_only_arrays
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? elements_kind.fast_double
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: elements_kind.fast);
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}
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*/
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/* Element transitions have not been implemented in crankshaft yet.
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%OptimizeFunctionOnNextCall(polymorphic);
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polymorphic(smis, elements_kind.fast_smi_only);
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polymorphic(strings, elements_kind.fast);
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polymorphic(doubles, elements_kind.fast);
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// Crankshaft support for smi-only elements in dynamic array literals.
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function get(foo) { return foo; } // Used to generate dynamic values.
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function crankshaft_test() {
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var a = [get(1), get(2), get(3)];
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assertKind(elements_kind.fast_smi_only, a);
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var b = [get(1), get(2), get("three")];
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assertKind(elements_kind.fast, b);
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var c = [get(1), get(2), get(3.5)];
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// The full code generator doesn't support conversion to fast_double
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// yet. Crankshaft does, but only with --smi-only-arrays support.
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if ((%GetOptimizationStatus(crankshaft_test) & 1) &&
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support_smi_only_arrays) {
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assertKind(elements_kind.fast_double, c);
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} else {
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assertKind(elements_kind.fast, c);
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}
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}
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for (var i = 0; i < 3; i++) {
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crankshaft_test();
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}
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%OptimizeFunctionOnNextCall(crankshaft_test);
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crankshaft_test();
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*/
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// Elements_kind transitions for arrays.
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// A map can have three different elements_kind transitions: SMI->DOUBLE,
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// DOUBLE->OBJECT, and SMI->OBJECT. No matter in which order these three are
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// created, they must always end up with the same FAST map.
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// This test is meaningless without FAST_SMI_ONLY_ELEMENTS.
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if (support_smi_only_arrays) {
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// Preparation: create one pair of identical objects for each case.
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var a = [1, 2, 3];
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var b = [1, 2, 3];
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assertTrue(%HaveSameMap(a, b));
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assertKind(elements_kind.fast_smi_only, a);
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var c = [1, 2, 3];
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c["case2"] = true;
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var d = [1, 2, 3];
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d["case2"] = true;
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assertTrue(%HaveSameMap(c, d));
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assertFalse(%HaveSameMap(a, c));
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assertKind(elements_kind.fast_smi_only, c);
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var e = [1, 2, 3];
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e["case3"] = true;
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var f = [1, 2, 3];
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f["case3"] = true;
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assertTrue(%HaveSameMap(e, f));
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assertFalse(%HaveSameMap(a, e));
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assertFalse(%HaveSameMap(c, e));
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assertKind(elements_kind.fast_smi_only, e);
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// Case 1: SMI->DOUBLE, DOUBLE->OBJECT, SMI->OBJECT.
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a[0] = 1.5;
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assertKind(elements_kind.fast_double, a);
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a[0] = "foo";
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assertKind(elements_kind.fast, a);
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b[0] = "bar";
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assertTrue(%HaveSameMap(a, b));
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// Case 2: SMI->DOUBLE, SMI->OBJECT, DOUBLE->OBJECT.
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c[0] = 1.5;
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assertKind(elements_kind.fast_double, c);
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assertFalse(%HaveSameMap(c, d));
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d[0] = "foo";
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assertKind(elements_kind.fast, d);
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assertFalse(%HaveSameMap(c, d));
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c[0] = "bar";
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assertTrue(%HaveSameMap(c, d));
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// Case 3: SMI->OBJECT, SMI->DOUBLE, DOUBLE->OBJECT.
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e[0] = "foo";
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assertKind(elements_kind.fast, e);
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assertFalse(%HaveSameMap(e, f));
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f[0] = 1.5;
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assertKind(elements_kind.fast_double, f);
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assertFalse(%HaveSameMap(e, f));
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f[0] = "bar";
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assertKind(elements_kind.fast, f);
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assertTrue(%HaveSameMap(e, f));
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}
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// Throw away type information in the ICs for next stress run.
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gc();
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