v8/test/mjsunit/dehoisted-array-index.js

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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
var a = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
// Key is HParameter
function aoo(i) {
return a[i + 1];
}
aoo(1);
aoo(-1);
%OptimizeFunctionOnNextCall(aoo);
aoo(-1);
// Key is HChange, used by either dehoised or non-dehoisted
function boo(i) {
var ret = 0;
if (i < 0) {
ret = a[i + 10];
} else {
ret = a[i];
}
return ret;
}
boo(1);
boo(-1);
%OptimizeFunctionOnNextCall(boo);
boo(-1);
// Key is HMul(-i ==> i * (-1))
function coo() {
var ret = 0;
for (var i = 4; i > 0; i -= 1) {
ret += a[-i + 4]; // dehoisted
}
return ret;
}
coo();
coo();
%OptimizeFunctionOnNextCall(coo);
coo();
// Key is HPhi, used only by dehoisted
function doo() {
var ret = 0;
for (var i = 0; i < 5; i += 1) {
ret += a[i + 1]; // dehoisted
}
return ret;
}
doo();
doo();
%OptimizeFunctionOnNextCall(doo);
doo();
// Key is HPhi, but used by both dehoisted and non-dehoisted
// sign extend is useless
function eoo() {
var ret = 0;
for (var i = 0; i < 5; i += 1) {
ret += a[i]; // non-dehoisted
ret += a[i + 1]; // dehoisted
}
return ret;
}
eoo();
eoo();
%OptimizeFunctionOnNextCall(eoo);
eoo();
// Key is HPhi, but used by either dehoisted or non-dehoisted
function foo() {
var ret = 0;
for (var i = -3; i < 4; i += 1) {
if (i < 0) {
ret += a[i + 4]; // dehoisted
} else {
ret += a[i]; // non-dehoisted
}
}
return ret;
}
foo();
foo();
%OptimizeFunctionOnNextCall(foo);
foo();
// Key is HPhi, but not induction variable
function goo(i) {
if (i > 0) {
i += 1;
} else {
i += -1;
}
return a[i + 3];
}
goo(-1);
goo(-1);
%OptimizeFunctionOnNextCall(goo);
goo(-1);
// Key is return value of function
function index() {
return 1;
}
%NeverOptimizeFunction(index);
function hoo() {
return a[index() + 3];
}
hoo();
hoo();
%OptimizeFunctionOnNextCall(hoo);
hoo();
// Sign extension of key makes AssertZeroExtended fail in DoBoundsCheck
function ioo(i) {
return a[i] + a[i + 1];
}
ioo(1);
ioo(1);
%OptimizeFunctionOnNextCall(ioo);
ioo(-1);