1 // Copyright 2012 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 29 30 // Test materialization of the arguments object when deoptimizing a 31 // strict mode closure after modifying an argument. 32 33 (function () { 34 var forceDeopt = 0; 35 function inner(x) { 36 "use strict"; 37 x = 2; 38 // Do not remove this %DebugPrint as it makes sure the deopt happens 39 // after the assignment and is not hoisted above the assignment. 40 %DebugPrint(arguments[0]); 41 forceDeopt + 1; 42 return arguments[0]; 43 } 44 45 assertEquals(1, inner(1)); 46 assertEquals(1, inner(1)); 47 %OptimizeFunctionOnNextCall(inner); 48 assertEquals(1, inner(1)); 49 forceDeopt = "not a number"; 50 assertEquals(1, inner(1)); 51 })(); 52 53 54 // Test materialization of the arguments object when deoptimizing an 55 // inlined strict mode closure after modifying an argument. 56 57 (function () { 58 var forceDeopt = 0; 59 function inner(x) { 60 "use strict"; 61 x = 2; 62 // Do not remove this %DebugPrint as it makes sure the deopt happens 63 // after the assignment and is not hoisted above the assignment. 64 %DebugPrint(arguments[0]); 65 forceDeopt + 1; 66 return arguments[0]; 67 } 68 69 function outer(x) { 70 return inner(x); 71 } 72 73 assertEquals(1, outer(1)); 74 assertEquals(1, outer(1)); 75 %OptimizeFunctionOnNextCall(outer); 76 assertEquals(1, outer(1)); 77 forceDeopt = "not a number"; 78 assertEquals(1, outer(1)); 79 })(); 80 81 82 // Test materialization of the multiple arguments objects when 83 // deoptimizing several inlined closure after modifying an argument. 84 85 (function () { 86 var forceDeopt = 0; 87 function inner(x,y,z) { 88 "use strict"; 89 x = 3; 90 // Do not remove this %DebugPrint as it makes sure the deopt happens 91 // after the assignment and is not hoisted above the assignment. 92 %DebugPrint(arguments[0]); 93 forceDeopt + 1; 94 return arguments[0]; 95 } 96 97 function middle(x) { 98 "use strict"; 99 x = 2; 100 return inner(10*x, 20*x, 30*x) + arguments[0]; 101 } 102 103 function outer(x) { 104 return middle(x); 105 } 106 107 assertEquals(21, outer(1)); 108 assertEquals(21, outer(1)); 109 %OptimizeFunctionOnNextCall(outer); 110 assertEquals(21, outer(1)); 111 forceDeopt = "not a number"; 112 assertEquals(21, outer(1)); 113 })(); 114
