v8/test/mjsunit/osr-elements-kind.js
mstarzinger@chromium.org 3eded2c06c Fix %NeverOptimizeFunction runtime call.
The current usage of this runtime function is broken as it does not
prevent inlining of the affected function but rather bails out from the
whole unit of compilation after trying to inline affected functions.
This simplifies said runtime function to avoid accidental misuse.

R=titzer@chromium.org
TEST=mjsunit/never-optimize

Review URL: https://codereview.chromium.org/19776006

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@15762 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
2013-07-19 08:25:44 +00:00

156 lines
6.0 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: --notrack_allocation_sites
// 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
// 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));
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;
// 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) {
if (!support_smi_only_arrays &&
expected == elements_kind.fast_smi_only) {
expected = elements_kind.fast;
}
assertEquals(expected, getKind(obj), name_opt);
}
// long-running loop forces OSR.
%NeverOptimizeFunction(construct_smis);
%NeverOptimizeFunction(construct_doubles);
%NeverOptimizeFunction(convert_mixed);
for (var i = 0; i < 1000000; i++) { }
if (support_smi_only_arrays) {
function construct_smis() {
var a = [0, 0, 0];
a[0] = 0; // Send the COW array map to the steak house.
assertKind(elements_kind.fast_smi_only, a);
return a;
}
function construct_doubles() {
var a = construct_smis();
a[0] = 1.5;
assertKind(elements_kind.fast_double, a);
return a;
}
// Test transition chain SMI->DOUBLE->FAST (crankshafted function will
// transition to FAST directly).
function convert_mixed(array, value, kind) {
array[1] = value;
assertKind(kind, array);
assertEquals(value, array[1]);
}
smis = construct_smis();
convert_mixed(smis, 1.5, elements_kind.fast_double);
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));
}
// Throw away type information in the ICs for next stress run.
gc();