test/mjsunit/regress/regress-1278.js

// Copyright 2010 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.

// See: http://code.google.com/p/v8/issues/detail?id=1278

// Test that that handling of 0/-0 is correct for binary operations when the
// TypeRecordingBinaryOpStub transitions through different states.

function add(x, y) {
  return x + y;
}

function sub(x, y) {
  return x - y;
}

function mul(x, y) {
  return x * y;
}

function div(x, y) {
  return x / y;
}

for (var i = 0; i < 10; i++) {
  assertEquals(0, add(0, 0));
  assertEquals(0, add(0, -0));
  assertEquals(0, add(-0, 0));
  assertEquals(-0, add(-0, -0));

  assertEquals(0, sub(0, 0));
  assertEquals(0, sub(0, -0));
  assertEquals(-0, sub(-0, 0));
  assertEquals(0, sub(-0, -0));

  assertEquals(0, mul(0, 0));
  assertEquals(-0, mul(0, -0));
  assertEquals(-0, mul(-0, 0));
  assertEquals(0, mul(-0, -0));

  assertEquals(0, div(0, 1));
  assertEquals(-0, div(0, -1));
  assertEquals(-0, div(-0, 1));
  assertEquals(0, div(-0, -1));
}