v8/test/mjsunit/bounds-checks-elimination.js

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// Copyright 2014 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// Flags: --allow-natives-syntax --array-bounds-checks-elimination
var a = []
for (var i = 0; i < 9; i++) a[i] = i + 1;
function test(f, arg1, arg2, expected) {
assertEquals(expected, f(arg1));
f(arg2);
%OptimizeFunctionOnNextCall(f);
assertEquals(expected, f(arg1));
}
test(function f0() {
return a[7] * a[6] * a[5] * a[4] * a[3] * a[2] * a[1] * a[0];
}, 0, 1, 40320);
test(function f1() {
return a[7] * a[6] * a[5] * a[4] * a[10] * a[2] * a[1] * a[0];
}, 0, 1, NaN);
test(function f2() {
return a[0] * a[1] * a[2] * a[3] * a[4] * a[5] * a[6] * a[7];
}, 0, 1, 40320);
test(function f3() {
return a[3] * a[0] * a[6] * a[7] * a[5] * a[1] * a[4] * a[2];
}, 0, 1, 40320);
test(function f4(b) {
return a[b+3] * a[0] * a[b+6] * a[7] * a[b+5] * a[1] * a[b+4] * a[2];
}, 0, 1, 40320);
test(function f5(b) {
return a[b+1] * a[0] * a[b+4] * a[7] * a[b+3] * a[1] * a[b+2] * a[2];
}, 2, 3, 40320);
test(function f6(b) {
var c;
if (b) c = a[3] * a[0] * a[6] * a[7];
return c * a[5] * a[1] * a[4] * a[2];
}, true, false, 40320);
test(function f7(b) {
var c = a[7];
if (b) c *= a[3] * a[0] * a[6];
return c * a[5] * a[1] * a[4] * a[2];
}, true, false, 40320);
test(function f8(b) {
var c = a[7];
if (b) c *= a[3] * a[0] * a[6];
return c * a[5] * a[10] * a[4] * a[2];
}, true, false, NaN);
test(function f9(b) {
var c = a[1];
if (b) {
c *= a[3] * a[0] * a[6];
} else {
c = a[6] * a[5] * a[4];
}
return c * a[5] * a[7] * a[4] * a[2];
}, true, false, 40320);
test(function fa(b) {
var c = a[1];
if (b) {
c = a[6] * a[b+5] * a[4];
} else {
c *= a[b+3] * a[0] * a[b+6];
}
return c * a[5] * a[b+7] * a[4] * a[2];
}, 0, 1, 40320);
test(function fb(b) {
var c = a[b-3];
if (b != 4) {
c = a[6] * a[b+1] * a[4];
} else {
c *= a[b-1] * a[0] * a[b+2];
}
return c * a[5] * a[b+3] * a[4] * a[b-2];
}, 4, 3, 40320);
test(function fc(b) {
var c = a[b-3];
if (b != 4) {
c = a[6] * a[b+1] * a[4];
} else {
c *= a[b-1] * a[0] * a[b+2];
}
return c * a[5] * a[b+3] * a[4] * a[b-2];
}, 6, 3, NaN);
test(function fd(b) {
var c = a[b-3];
if (b != 4) {
c = a[6] * a[b+1] * a[4];
} else {
c *= a[b-1] * a[0] * a[b+2];
}
return c * a[5] * a[b+3] * a[4] * a[b-2];
}, 1, 4, NaN);
test(function fe(b) {
var c = 1;
for (var i = 1; i < b-1; i++) {
c *= a[i-1] * a[i] * a[i+1];
}
return c;
}, 8, 4, (40320 / 8 / 7) * (40320 / 8) * (40320 / 2));
test(function ff(b) {
var c = 0;
for (var i = 0; i < b; i++) {
c += a[3] * a[0] * a[6] * a[7] * a[5] * a[1] * a[4] * a[2];
}
return c;
}, 100, 4, 40320 * 100);