162 lines
6.0 KiB
JavaScript
162 lines
6.0 KiB
JavaScript
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// Copyright 2013 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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// Limit the number of stress runs to reduce polymorphism it defeats some of the
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// assumptions made about how elements transitions work because transition stubs
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// end up going generic.
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// Flags: --stress-runs=2
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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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function construct_smis() {
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try {} catch (e) {} // TODO(titzer): DisableOptimization
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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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try {} catch (e) {} // TODO(titzer): DisableOptimization
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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 convert_mixed(array, value, kind) {
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try {} catch (e) {} // TODO(titzer): DisableOptimization
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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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function test1() {
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if (!support_smi_only_arrays) return;
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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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var smis = construct_smis();
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convert_mixed(smis, 1.5, elements_kind.fast_double);
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var doubles = construct_doubles();
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convert_mixed(doubles, "three", elements_kind.fast);
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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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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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test1();
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gc(); // clear IC state
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test1();
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gc(); // clear IC state
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%OptimizeFunctionOnNextCall(test1);
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test1();
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gc(); // clear IC state
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