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| 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 })(); |
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