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// Copyright 2013 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
// Limit the number of stress runs to reduce polymorphism it defeats some of the
// assumptions made about how elements transitions work because transition stubs
// end up going generic.
// Flags: --stress-runs=2
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;
// Every external kind is also an external array.
assertTrue(%HasExternalArrayElements(obj));
if (%HasExternalByteElements(obj)) {
return elements_kind.external_byte;
}
if (%HasExternalUnsignedByteElements(obj)) {
return elements_kind.external_unsigned_byte;
}
if (%HasExternalShortElements(obj)) {
return elements_kind.external_short;
}
if (%HasExternalUnsignedShortElements(obj)) {
return elements_kind.external_unsigned_short;
}
if (%HasExternalIntElements(obj)) {
return elements_kind.external_int;
}
if (%HasExternalUnsignedIntElements(obj)) {
return elements_kind.external_unsigned_int;
}
if (%HasExternalFloatElements(obj)) {
return elements_kind.external_float;
}
if (%HasExternalDoubleElements(obj)) {
return elements_kind.external_double;
}
if (%HasExternalPixelElements(obj)) {
return elements_kind.external_pixel;
}
}
function assertKind(expected, obj, name_opt) {
assertEquals(expected, getKind(obj), name_opt);
}
%NeverOptimizeFunction(construct_smis);
// This code exists to eliminate the learning influence of AllocationSites
// on the following tests.
var __sequence = 0;
function make_array_string() {
this.__sequence = this.__sequence + 1;
return "/* " + this.__sequence + " */ [0, 0, 0];"
}
function make_array() {
return eval(make_array_string());
}
function construct_smis() {
var a = make_array();
a[0] = 0; // Send the COW array map to the steak house.
assertKind(elements_kind.fast_smi_only, a);
return a;
}
%NeverOptimizeFunction(construct_doubles);
function construct_doubles() {
var a = construct_smis();
a[0] = 1.5;
assertKind(elements_kind.fast_double, a);
return a;
}
%NeverOptimizeFunction(convert_mixed);
function convert_mixed(array, value, kind) {
array[1] = value;
assertKind(kind, array);
assertEquals(value, array[1]);
}
function test1() {
// Test transition chain SMI->DOUBLE->FAST (crankshafted function will
// transition to FAST directly).
var smis = construct_smis();
convert_mixed(smis, 1.5, elements_kind.fast_double);
var doubles = construct_doubles();
convert_mixed(doubles, "three", elements_kind.fast);
convert_mixed(construct_smis(), "three", elements_kind.fast);
convert_mixed(construct_doubles(), "three", elements_kind.fast);
smis = construct_smis();
doubles = construct_doubles();
convert_mixed(smis, 1, elements_kind.fast);
convert_mixed(doubles, 1, elements_kind.fast);
assertTrue(%HaveSameMap(smis, doubles));
}
function clear_ic_state() {
%ClearFunctionTypeFeedback(construct_smis);
%ClearFunctionTypeFeedback(construct_doubles);
%ClearFunctionTypeFeedback(convert_mixed);
}
test1();
clear_ic_state();
test1();
clear_ic_state();
%OptimizeFunctionOnNextCall(test1);
test1();
clear_ic_state();
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