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// 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 --expose-gc --opt --no-always-opt
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 (%HasSmiElements(obj)) return elements_kind.fast_smi_only;
if (%HasObjectElements(obj)) return elements_kind.fast;
if (%HasDoubleElements(obj)) return elements_kind.fast_double;
if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
}
function isHoley(obj) {
if (%HasHoleyElements(obj)) return true;
return false;
}
function assertKind(expected, obj, name_opt) {
assertEquals(expected, getKind(obj), name_opt);
}
function assertHoley(obj, name_opt) {
assertEquals(true, isHoley(obj), name_opt);
}
function assertNotHoley(obj, name_opt) {
assertEquals(false, isHoley(obj), name_opt);
}
// Create a new closure that inlines Array.prototype.filter().
function create(a) {
return function() {
return a.filter(x => false);
}
}
function runTest(test, kind, holey_predicate) {
// Verify built-in implementation produces correct results.
let a = test();
assertKind(kind, a);
holey_predicate(a);
test();
test();
%OptimizeFunctionOnNextCall(test);
// Now for optimized code.
a = test();
assertKind(kind, a);
holey_predicate(a);
}
function chooseHoleyPredicate(a) {
return isHoley(a) ? assertHoley : assertNotHoley;
}
(function() {
let data = [];
// Packed literal arrays.
data.push(() => [1, 2, 3]);
data.push(() => [true, true, false]);
data.push(() => [1.0, 1.5, 3.5]);
// Holey literal arrays.
data.push(() => { let obj = [1,, 3]; obj[1] = 2; return obj; });
data.push(() => { let obj = [true,, false]; obj[1] = true; return obj; });
data.push(() => { let obj = [1.0,, 3.5]; obj[1] = 1.5; return obj; });
// Packed constructed arrays.
data.push(() => new Array(1, 2, 3));
data.push(() => new Array(true, true, false));
data.push(() => new Array(1.0, 1.5, 3.5));
// Holey constructed arrays.
data.push(() => {
let obj = new Array(3);
obj[0] = 1;
obj[1] = 2;
obj[2] = 3;
return obj;
});
data.push(() => {
let obj = new Array(3);
obj[0] = true;
obj[1] = true;
obj[2] = false;
return obj;
});
data.push(() => {
let obj = new Array(3);
obj[0] = 1.0;
obj[1] = 1.5;
obj[2] = 3.5;
return obj;
});
for (datum of data) {
let a = datum();
// runTest(create(a), getKind(a), chooseHoleyPredicate(a));
let f = function() { return a.filter(x => false); }
runTest(f, getKind(a), chooseHoleyPredicate(a));
}
})();