// 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 --load-elimination // Test global load elimination in the presence of OSR compilation. function It(x, y) { } function foo_osr(x, limit) { var o = new It(); o.x = x; o.y = x; for (var i = 0; i < limit; i++) { o.y += o.x; // Load of x cannot be hoisted due to OSR. } return o.y; } assertEquals(22, foo_osr(11, 1)); assertEquals(24, foo_osr(12, 1)); assertEquals(1300013, foo_osr(13, 100000)); function foo_hot(x, limit) { var o = new It(); o.x = x; o.y = x; for (var i = 0; i < limit; i++) { o.y += o.x; // Load of x can be hoisted without OSR. } return o.y; } %PrepareFunctionForOptimization(foo_hot); assertEquals(22, foo_hot(11, 1)); assertEquals(24, foo_hot(12, 1)); %OptimizeFunctionOnNextCall(foo_hot); assertEquals(32, foo_hot(16, 1)); assertEquals(1300013, foo_hot(13, 100000));