1 // Copyright 2013 the V8 project authors. All rights reserved. 2 // Redistribution and use in source and binary forms, with or without 3 // modification, are permitted provided that the following conditions are 4 // met: 5 // 6 // * Redistributions of source code must retain the above copyright 7 // notice, this list of conditions and the following disclaimer. 8 // * Redistributions in binary form must reproduce the above 9 // copyright notice, this list of conditions and the following 10 // disclaimer in the documentation and/or other materials provided 11 // with the distribution. 12 // * Neither the name of Google Inc. nor the names of its 13 // contributors may be used to endorse or promote products derived 14 // from this software without specific prior written permission. 15 // 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 28 // Flags: --allow-natives-syntax --load-elimination 29 30 // Test global load elimination in the presence of OSR compilation. 31 32 function It(x, y) { } 33 34 function foo_osr(x, limit) { 35 var o = new It(); 36 o.x = x; 37 o.y = x; 38 for (var i = 0; i < limit; i++) { 39 o.y += o.x; // Load of x cannot be hoisted due to OSR. 40 } 41 42 return o.y; 43 } 44 45 assertEquals(22, foo_osr(11, 1)); 46 assertEquals(24, foo_osr(12, 1)); 47 assertEquals(1300013, foo_osr(13, 100000)); 48 49 50 function foo_hot(x, limit) { 51 var o = new It(); 52 o.x = x; 53 o.y = x; 54 for (var i = 0; i < limit; i++) { 55 o.y += o.x; // Load of x can be hoisted without OSR. 56 } 57 58 return o.y; 59 } 60 61 assertEquals(22, foo_hot(11, 1)); 62 assertEquals(24, foo_hot(12, 1)); 63 %OptimizeFunctionOnNextCall(foo_hot); 64 assertEquals(32, foo_hot(16, 1)); 65 assertEquals(1300013, foo_hot(13, 100000)); 66
