008f7ab302
TEST=element-kind.js Review URL: http://codereview.chromium.org/8077008 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@9485 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
207 lines
8.6 KiB
JavaScript
207 lines
8.6 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
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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 element_kind = {
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fast_smi_only_elements : 0,
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fast_elements : 1,
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fast_double_elements : 2,
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dictionary_elements : 3,
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external_byte_elements : 4,
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external_unsigned_byte_elements : 5,
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external_short_elements : 6,
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external_unsigned_short_elements : 7,
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external_int_elements : 8,
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external_unsigned_int_elements : 9,
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external_float_elements : 10,
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external_double_elements : 11,
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external_pixel_elements : 12
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}
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// We expect an object to only be of one element kind.
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function assertKind(expected, obj) {
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if (support_smi_only_arrays) {
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assertEquals(expected == element_kind.fast_smi_only_elements,
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%HasFastSmiOnlyElements(obj));
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assertEquals(expected == element_kind.fast_elements,
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%HasFastElements(obj));
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} else {
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assertEquals(expected == element_kind.fast_elements ||
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expected == element_kind.fast_smi_only_elements,
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%HasFastElements(obj));
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}
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assertEquals(expected == element_kind.fast_double_elements,
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%HasFastDoubleElements(obj));
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assertEquals(expected == element_kind.dictionary_elements,
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%HasDictionaryElements(obj));
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assertEquals(expected == element_kind.external_byte_elements,
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%HasExternalByteElements(obj));
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assertEquals(expected == element_kind.external_unsigned_byte_elements,
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%HasExternalUnsignedByteElements(obj));
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assertEquals(expected == element_kind.external_short_elements,
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%HasExternalShortElements(obj));
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assertEquals(expected == element_kind.external_unsigned_short_elements,
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%HasExternalUnsignedShortElements(obj));
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assertEquals(expected == element_kind.external_int_elements,
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%HasExternalIntElements(obj));
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assertEquals(expected == element_kind.external_unsigned_int_elements,
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%HasExternalUnsignedIntElements(obj));
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assertEquals(expected == element_kind.external_float_elements,
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%HasExternalFloatElements(obj));
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assertEquals(expected == element_kind.external_double_elements,
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%HasExternalDoubleElements(obj));
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assertEquals(expected == element_kind.external_pixel_elements,
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%HasExternalPixelElements(obj));
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// every external kind is also an external array
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assertEquals(expected >= element_kind.external_byte_elements,
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%HasExternalArrayElements(obj));
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}
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var me = {};
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assertKind(element_kind.fast_elements, me);
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me.dance = 0xD15C0;
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me.drink = 0xC0C0A;
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assertKind(element_kind.fast_elements, me);
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var too = [1,2,3];
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assertKind(element_kind.fast_smi_only_elements, too);
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too.dance = 0xD15C0;
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too.drink = 0xC0C0A;
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assertKind(element_kind.fast_smi_only_elements, 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(element_kind.fast_smi_only_elements, 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(element_kind.fast_smi_only_elements, 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(element_kind.fast_elements, you);
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assertKind(element_kind.dictionary_elements, 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(element_kind.fast_double_elements, fast_double_array);
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assertKind(element_kind.external_byte_elements, new Int8Array(9001));
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assertKind(element_kind.external_unsigned_byte_elements, new Uint8Array(007));
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assertKind(element_kind.external_short_elements, new Int16Array(666));
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assertKind(element_kind.external_unsigned_short_elements, new Uint16Array(42));
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assertKind(element_kind.external_int_elements, new Int32Array(0xF));
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assertKind(element_kind.external_unsigned_int_elements, new Uint32Array(23));
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assertKind(element_kind.external_float_elements, new Float32Array(7));
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assertKind(element_kind.external_double_elements, new Float64Array(0));
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assertKind(element_kind.external_pixel_elements, 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(element_kind.fast_smi_only_elements, 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 = ["one", "two", "three"];
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var doubles = [0, 0, 0]; doubles[0] = 1.5; doubles[1] = 2.5; doubles[2] = 3.5;
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assertKind(support_smi_only_arrays
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? element_kind.fast_double_elements
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: element_kind.fast_elements,
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doubles);
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for (var i = 0; i < 3; i++) {
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polymorphic(smis, element_kind.fast_smi_only_elements);
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polymorphic(strings, element_kind.fast_elements);
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polymorphic(doubles, support_smi_only_arrays
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? element_kind.fast_double_elements
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: element_kind.fast_elements);
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}
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%OptimizeFunctionOnNextCall(polymorphic);
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polymorphic(smis, element_kind.fast_smi_only_elements);
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polymorphic(strings, element_kind.fast_elements);
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polymorphic(doubles, support_smi_only_arrays
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? element_kind.fast_double_elements
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: element_kind.fast_elements);
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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(expected_kind) {
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function crankshaft_test() {
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var a = [get(1), get(2), get(3)];
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assertKind(element_kind.fast_smi_only_elements, a);
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var b = [get(1), get(2), get("three")];
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assertKind(element_kind.fast_elements, 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_elements
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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(element_kind.fast_double_elements, c);
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} else {
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assertKind(element_kind.fast_elements, 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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