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// Copyright 2011 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 --smi-only-arrays
// Test element kind of objects.
// Since --smi-only-arrays affects builtins, its default setting at compile
// time sticks if built with snapshot. If --smi-only-arrays is deactivated
// by default, only a no-snapshot build actually has smi-only arrays enabled
// in this test case. Depending on whether smi-only arrays are actually
// enabled, this test takes the appropriate code path to check smi-only arrays.
support_smi_only_arrays = %HasFastSmiOnlyElements([]);
if (support_smi_only_arrays) {
print("Tests include smi-only arrays.");
} else {
print("Tests do NOT include smi-only arrays.");
}
var element_kind = {
fast_smi_only_elements : 0,
fast_elements : 1,
fast_double_elements : 2,
dictionary_elements : 3,
external_byte_elements : 4,
external_unsigned_byte_elements : 5,
external_short_elements : 6,
external_unsigned_short_elements : 7,
external_int_elements : 8,
external_unsigned_int_elements : 9,
external_float_elements : 10,
external_double_elements : 11,
external_pixel_elements : 12
}
// We expect an object to only be of one element kind.
function assertKind(expected, obj) {
if (support_smi_only_arrays) {
assertEquals(expected == element_kind.fast_smi_only_elements,
%HasFastSmiOnlyElements(obj));
assertEquals(expected == element_kind.fast_elements,
%HasFastElements(obj));
} else {
assertEquals(expected == element_kind.fast_elements ||
expected == element_kind.fast_smi_only_elements,
%HasFastElements(obj));
}
assertEquals(expected == element_kind.fast_double_elements,
%HasFastDoubleElements(obj));
assertEquals(expected == element_kind.dictionary_elements,
%HasDictionaryElements(obj));
assertEquals(expected == element_kind.external_byte_elements,
%HasExternalByteElements(obj));
assertEquals(expected == element_kind.external_unsigned_byte_elements,
%HasExternalUnsignedByteElements(obj));
assertEquals(expected == element_kind.external_short_elements,
%HasExternalShortElements(obj));
assertEquals(expected == element_kind.external_unsigned_short_elements,
%HasExternalUnsignedShortElements(obj));
assertEquals(expected == element_kind.external_int_elements,
%HasExternalIntElements(obj));
assertEquals(expected == element_kind.external_unsigned_int_elements,
%HasExternalUnsignedIntElements(obj));
assertEquals(expected == element_kind.external_float_elements,
%HasExternalFloatElements(obj));
assertEquals(expected == element_kind.external_double_elements,
%HasExternalDoubleElements(obj));
assertEquals(expected == element_kind.external_pixel_elements,
%HasExternalPixelElements(obj));
// every external kind is also an external array
assertEquals(expected >= element_kind.external_byte_elements,
%HasExternalArrayElements(obj));
}
var me = {};
assertKind(element_kind.fast_elements, me);
me.dance = 0xD15C0;
me.drink = 0xC0C0A;
assertKind(element_kind.fast_elements, me);
var too = [1,2,3];
assertKind(element_kind.fast_smi_only_elements, too);
too.dance = 0xD15C0;
too.drink = 0xC0C0A;
assertKind(element_kind.fast_smi_only_elements, too);
// Make sure the element kind transitions from smionly when a non-smi is stored.
var you = new Array();
assertKind(element_kind.fast_smi_only_elements, you);
for (var i = 0; i < 1337; i++) {
var val = i;
if (i == 1336) {
assertKind(element_kind.fast_smi_only_elements, you);
val = new Object();
}
you[i] = val;
}
assertKind(element_kind.fast_elements, you);
assertKind(element_kind.dictionary_elements, new Array(0xDECAF));
var fast_double_array = new Array(0xDECAF);
for (var i = 0; i < 0xDECAF; i++) fast_double_array[i] = i / 2;
assertKind(element_kind.fast_double_elements, fast_double_array);
assertKind(element_kind.external_byte_elements, new Int8Array(9001));
assertKind(element_kind.external_unsigned_byte_elements, new Uint8Array(007));
assertKind(element_kind.external_short_elements, new Int16Array(666));
assertKind(element_kind.external_unsigned_short_elements, new Uint16Array(42));
assertKind(element_kind.external_int_elements, new Int32Array(0xF));
assertKind(element_kind.external_unsigned_int_elements, new Uint32Array(23));
assertKind(element_kind.external_float_elements, new Float32Array(7));
assertKind(element_kind.external_double_elements, new Float64Array(0));
assertKind(element_kind.external_pixel_elements, new PixelArray(512));
// Crankshaft support for smi-only array elements.
function monomorphic(array) {
for (var i = 0; i < 3; i++) {
array[i] = i + 10;
}
assertKind(element_kind.fast_smi_only_elements, array);
for (var i = 0; i < 3; i++) {
var a = array[i];
assertEquals(i + 10, a);
}
}
var smi_only = [1, 2, 3];
for (var i = 0; i < 3; i++) monomorphic(smi_only);
%OptimizeFunctionOnNextCall(monomorphic);
monomorphic(smi_only);
function polymorphic(array, expected_kind) {
array[1] = 42;
assertKind(expected_kind, array);
var a = array[1];
assertEquals(42, a);
}
var smis = [1, 2, 3];
var strings = ["one", "two", "three"];
var doubles = [0, 0, 0]; doubles[0] = 1.5; doubles[1] = 2.5; doubles[2] = 3.5;
assertKind(support_smi_only_arrays
? element_kind.fast_double_elements
: element_kind.fast_elements,
doubles);
for (var i = 0; i < 3; i++) {
polymorphic(smis, element_kind.fast_smi_only_elements);
polymorphic(strings, element_kind.fast_elements);
polymorphic(doubles, support_smi_only_arrays
? element_kind.fast_double_elements
: element_kind.fast_elements);
}
%OptimizeFunctionOnNextCall(polymorphic);
polymorphic(smis, element_kind.fast_smi_only_elements);
polymorphic(strings, element_kind.fast_elements);
polymorphic(doubles, support_smi_only_arrays
? element_kind.fast_double_elements
: element_kind.fast_elements);
// Crankshaft support for smi-only elements in dynamic array literals.
function get(foo) { return foo; } // Used to generate dynamic values.
//function crankshaft_test(expected_kind) {
function crankshaft_test() {
var a = [get(1), get(2), get(3)];
assertKind(element_kind.fast_smi_only_elements, a);
var b = [get(1), get(2), get("three")];
assertKind(element_kind.fast_elements, b);
var c = [get(1), get(2), get(3.5)];
// The full code generator doesn't support conversion to fast_double_elements
// yet. Crankshaft does, but only with --smi-only-arrays support.
if ((%GetOptimizationStatus(crankshaft_test) & 1) &&
support_smi_only_arrays) {
assertKind(element_kind.fast_double_elements, c);
} else {
assertKind(element_kind.fast_elements, c);
}
}
for (var i = 0; i < 3; i++) {
crankshaft_test();
}
%OptimizeFunctionOnNextCall(crankshaft_test);
crankshaft_test();
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