529f801fde
we store an AllocationSiteInfo object right after the JSArray, with a pointer to the boilerplate object. Later, if the array transitions we check for the continued existence of the temporary AllocationSiteInfo object (has no roots). If found, we'll use it to transition the boilerplate array as well. Danno's original changeset: https://codereview.chromium.org/10615002/ Review URL: https://codereview.chromium.org/11663005 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13330 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
349 lines
12 KiB
JavaScript
349 lines
12 KiB
JavaScript
// Copyright 2012 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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// Flags: --notrack_allocation_sites
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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 = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
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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 (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only;
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if (%HasFastObjectElements(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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if (support_smi_only_arrays) {
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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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}
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// Make sure the element kind transitions from smi 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 Uint8ClampedArray(512));
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// Crankshaft support for smi-only array elements.
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function monomorphic(array) {
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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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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 = new Array(1, 2, 3);
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assertKind(elements_kind.fast_smi_only, smi_only);
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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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if (support_smi_only_arrays) {
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function construct_smis() {
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var a = [0, 0, 0];
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a[0] = 0; // Send the COW array map to the steak house.
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assertKind(elements_kind.fast_smi_only, a);
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return a;
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}
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function construct_doubles() {
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var a = construct_smis();
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a[0] = 1.5;
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assertKind(elements_kind.fast_double, a);
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return a;
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}
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function construct_objects() {
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var a = construct_smis();
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a[0] = "one";
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assertKind(elements_kind.fast, a);
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return a;
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}
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// Test crankshafted transition SMI->DOUBLE.
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function convert_to_double(array) {
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array[1] = 2.5;
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assertKind(elements_kind.fast_double, array);
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assertEquals(2.5, array[1]);
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}
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var smis = construct_smis();
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for (var i = 0; i < 3; i++) convert_to_double(smis);
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%OptimizeFunctionOnNextCall(convert_to_double);
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smis = construct_smis();
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convert_to_double(smis);
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// Test crankshafted transitions SMI->FAST and DOUBLE->FAST.
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function convert_to_fast(array) {
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array[1] = "two";
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assertKind(elements_kind.fast, array);
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assertEquals("two", array[1]);
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}
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smis = construct_smis();
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for (var i = 0; i < 3; i++) convert_to_fast(smis);
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var doubles = construct_doubles();
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for (var i = 0; i < 3; i++) convert_to_fast(doubles);
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smis = construct_smis();
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doubles = construct_doubles();
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%OptimizeFunctionOnNextCall(convert_to_fast);
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convert_to_fast(smis);
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convert_to_fast(doubles);
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// Test transition chain SMI->DOUBLE->FAST (crankshafted function will
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// transition to FAST directly).
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function convert_mixed(array, value, kind) {
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array[1] = value;
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assertKind(kind, array);
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assertEquals(value, array[1]);
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}
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smis = construct_smis();
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for (var i = 0; i < 3; i++) {
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convert_mixed(smis, 1.5, elements_kind.fast_double);
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}
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doubles = construct_doubles();
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for (var i = 0; i < 3; i++) {
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convert_mixed(doubles, "three", elements_kind.fast);
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}
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convert_mixed(construct_smis(), "three", elements_kind.fast);
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convert_mixed(construct_doubles(), "three", elements_kind.fast);
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%OptimizeFunctionOnNextCall(convert_mixed);
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smis = construct_smis();
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doubles = construct_doubles();
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convert_mixed(smis, 1, elements_kind.fast);
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convert_mixed(doubles, 1, elements_kind.fast);
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assertTrue(%HaveSameMap(smis, doubles));
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}
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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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if (support_smi_only_arrays) {
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var a1 = [get(1), get(2), get(3)];
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assertKind(elements_kind.fast_smi_only, a1);
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}
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var a2 = new Array(get(1), get(2), get(3));
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assertKind(elements_kind.fast_smi_only, a2);
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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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if (support_smi_only_arrays) {
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assertKind(elements_kind.fast_double, 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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// 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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// Test if Array.concat() works correctly with DOUBLE elements.
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if (support_smi_only_arrays) {
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var a = [1, 2];
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assertKind(elements_kind.fast_smi_only, a);
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var b = [4.5, 5.5];
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assertKind(elements_kind.fast_double, b);
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var c = a.concat(b);
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assertEquals([1, 2, 4.5, 5.5], c);
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assertKind(elements_kind.fast_double, c);
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}
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// Test that Array.push() correctly handles SMI elements.
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if (support_smi_only_arrays) {
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var a = [1, 2];
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assertKind(elements_kind.fast_smi_only, a);
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a.push(3, 4, 5);
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assertKind(elements_kind.fast_smi_only, a);
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assertEquals([1, 2, 3, 4, 5], a);
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}
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// Test that Array.splice() and Array.slice() return correct ElementsKinds.
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if (support_smi_only_arrays) {
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var a = ["foo", "bar"];
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assertKind(elements_kind.fast, a);
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var b = a.splice(0, 1);
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assertKind(elements_kind.fast, b);
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var c = a.slice(0, 1);
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assertKind(elements_kind.fast, c);
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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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