v8/test/mjsunit/array-feedback.js
mvstanton@chromium.org 081134ecd1 Removed flag optimize-constructed-arrays.
This eliminates a large amount of hand-written assembly in the platforms.

BUG=
R=danno@chromium.org, mstarzinger@chromium.org

Review URL: https://codereview.chromium.org/16453002

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15328 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2013-06-25 16:31:07 +00:00

214 lines
6.7 KiB
JavaScript

// Copyright 2012 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 --expose-gc
// Flags: --track-allocation-sites --noalways-opt
// 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 = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8));
support_smi_only_arrays = true;
if (support_smi_only_arrays) {
print("Tests include smi-only arrays.");
} else {
print("Tests do NOT include smi-only arrays.");
}
var elements_kind = {
fast_smi_only : 'fast smi only elements',
fast : 'fast elements',
fast_double : 'fast double elements',
dictionary : 'dictionary elements',
external_byte : 'external byte elements',
external_unsigned_byte : 'external unsigned byte elements',
external_short : 'external short elements',
external_unsigned_short : 'external unsigned short elements',
external_int : 'external int elements',
external_unsigned_int : 'external unsigned int elements',
external_float : 'external float elements',
external_double : 'external double elements',
external_pixel : 'external pixel elements'
}
function getKind(obj) {
if (%HasFastSmiElements(obj)) return elements_kind.fast_smi_only;
if (%HasFastObjectElements(obj)) return elements_kind.fast;
if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
}
function isHoley(obj) {
if (%HasFastHoleyElements(obj)) return true;
return false;
}
function assertKind(expected, obj, name_opt) {
if (!support_smi_only_arrays &&
expected == elements_kind.fast_smi_only) {
expected = elements_kind.fast;
}
assertEquals(expected, getKind(obj), name_opt);
}
if (support_smi_only_arrays) {
// Verify that basic elements kind feedback works for non-constructor
// array calls (as long as the call is made through an IC, and not
// a CallStub).
(function (){
function create0() {
return Array();
}
// Calls through ICs need warm up through uninitialized, then
// premonomorphic first.
create0();
create0();
a = create0();
assertKind(elements_kind.fast_smi_only, a);
a[0] = 3.5;
b = create0();
assertKind(elements_kind.fast_double, b);
function create1(arg) {
return Array(arg);
}
create1(0);
create1(0);
a = create1(0);
assertFalse(isHoley(a));
assertKind(elements_kind.fast_smi_only, a);
a[0] = "hello";
b = create1(10);
assertTrue(isHoley(b));
assertKind(elements_kind.fast, b);
a = create1(100000);
assertKind(elements_kind.dictionary, a);
function create3(arg1, arg2, arg3) {
return Array(arg1, arg2, arg3);
}
create3();
create3();
a = create3(1,2,3);
a[0] = 3.5;
b = create3(1,2,3);
assertKind(elements_kind.fast_double, b);
assertFalse(isHoley(b));
})();
// Verify that keyed calls work
(function (){
function create0(name) {
return this[name]();
}
name = "Array";
create0(name);
create0(name);
a = create0(name);
a[0] = 3.5;
b = create0(name);
assertKind(elements_kind.fast_double, b);
})();
// Verify that the IC can't be spoofed by patching
(function (){
function create0() {
return Array();
}
create0();
create0();
a = create0();
assertKind(elements_kind.fast_smi_only, a);
var oldArray = this.Array;
this.Array = function() { return ["hi"]; };
b = create0();
assertEquals(["hi"], b);
this.Array = oldArray;
})();
// Verify that calls are still made through an IC after crankshaft,
// though the type information is reset.
// TODO(mvstanton): instead, consume the type feedback gathered up
// until crankshaft time.
(function (){
function create0() {
return Array();
}
create0();
create0();
a = create0();
a[0] = 3.5;
%OptimizeFunctionOnNextCall(create0);
create0();
create0();
b = create0();
assertKind(elements_kind.fast_smi_only, b);
b[0] = 3.5;
c = create0();
assertKind(elements_kind.fast_double, c);
assertTrue(2 != %GetOptimizationStatus(create0));
})();
// Verify that cross context calls work
(function (){
var realmA = Realm.current();
var realmB = Realm.create();
assertEquals(0, realmA);
assertEquals(1, realmB);
function instanceof_check(type) {
assertTrue(type() instanceof type);
assertTrue(type(5) instanceof type);
assertTrue(type(1,2,3) instanceof type);
}
var realmBArray = Realm.eval(realmB, "Array");
instanceof_check(Array);
instanceof_check(Array);
instanceof_check(Array);
instanceof_check(realmBArray);
instanceof_check(realmBArray);
instanceof_check(realmBArray);
})();
}