v8/test/mjsunit/regress/regress-1713b.js

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// Copyright 2011 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 --always-compact --expose-gc
var O = { get f() { return 0; } };
var CODE = [];
var R = [];
function Allocate4Kb(N) {
var arr = [];
do {arr.push(new Array(1024));} while (--N > 0);
return arr;
}
function AllocateXMb(X) {
return Allocate4Kb((1024 * X) / 4);
}
function Node(v, next) { this.v = v; this.next = next; }
Node.prototype.execute = function (O) {
var n = this;
while (n.next !== null) n = n.next;
n.v(O);
};
function LongList(N, x) {
if (N == 0) return new Node(x, null);
return new Node(new Array(1024), LongList(N - 1, x));
}
var L = LongList(1024, function (O) {
for (var i = 0; i < 5; i++) O.f;
});
%NeverOptimizeFunction(Incremental);
function Incremental(O, x) {
if (!x) {
return;
}
function CreateCode(i) {
var f = new Function("return O.f_" + i);
CODE.push(f);
f(); // compile
f(); // compile
f(); // compile
}
for (var i = 0; i < 1e4; i++) CreateCode(i);
gc();
gc();
gc();
print(">>> 1 <<<");
L.execute(O);
L = null;
print(">>> 2 <<<");
AllocateXMb(8);
//rint("1");
//llocateXMb(8);
//rint("1");
//llocateXMb(8);
}
function foo(O, x) {
Incremental(O, x);
print('f');
for (var i = 0; i < 5; i++) O.f;
print('g');
bar(x);
}
function bar(x) {
if (!x) return;
%DeoptimizeFunction(foo);
AllocateXMb(8);
AllocateXMb(8);
}
var O1 = {};
var O2 = {};
var O3 = {};
var O4 = {f:0};
foo(O1, false);
foo(O2, false);
foo(O3, false);
%OptimizeFunctionOnNextCall(foo);
foo(O4, true);