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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
// Flags: --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 (%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) {
assertEquals(expected, getKind(obj), name_opt);
}
function get_literal(x) {
var literal = [1, 2, x];
return literal;
}
get_literal(3);
// It's important to store a from before we crankshaft get_literal, because
// mementos won't be created from crankshafted code at all.
a = get_literal(3);
%OptimizeFunctionOnNextCall(get_literal);
get_literal(3);
assertOptimized(get_literal);
assertTrue(%HasFastSmiElements(a));
// a has a memento so the transition caused by the store will affect the
// boilerplate.
a[0] = 3.5;
// We should have transitioned the boilerplate array to double, and
// crankshafted code should de-opt on the unexpected elements kind
b = get_literal(3);
assertTrue(%HasFastDoubleElements(b));
assertEquals([1, 2, 3], b);
assertUnoptimized(get_literal);
// Optimize again
get_literal(3);
%OptimizeFunctionOnNextCall(get_literal);
b = get_literal(3);
assertTrue(%HasFastDoubleElements(b));
assertOptimized(get_literal);
// Test: make sure allocation site information is updated through a
// transition from SMI->DOUBLE->FAST
(function() {
function bar(a, b, c) {
return [a, b, c];
}
a = bar(1, 2, 3);
a[0] = 3.5;
a[1] = 'hi';
b = bar(1, 2, 3);
assertKind(elements_kind.fast, b);
})();
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