v8/test/mjsunit/regress/regress-bce-underflow.js
Toon Verwaest 0f573464e6 Ensure we don't overflow in BCE
BUG=chromium:469148
LOG=y
R=dcarney@chromium.org

Review URL: https://codereview.chromium.org/1023123003

Cr-Commit-Position: refs/heads/master@{#27346}
2015-03-20 16:43:05 +00:00

36 lines
753 B
JavaScript

// Copyright 2015 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
function f(a, i, bool) {
var result;
if (bool) {
// Make sure i - -0x80000000 doesn't overflow in BCE, missing a check for
// x-0 later on.
result = f2(a, 0x7fffffff, i, i, -0x80000000);
} else {
result = f2(a, -3, 4, i, 0);
}
return result;
}
function f2(a, c, x, i, d) {
return a[x + c] + a[x - 0] + a[i - d];
}
var a = [];
var i = 0;
a.push(i++);
a.push(i++);
a.push(i++);
a.push(i++);
a.push(i++);
f(a, 0, false);
f(a, 0, false);
f(a, 0, false);
%OptimizeFunctionOnNextCall(f);
%DebugPrint(f(a, -0x7fffffff, true));