1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 // This is adapted from mjsunit/for-in-opt.js. 6 7 // Flags: --harmony-proxies --harmony-reflect --allow-natives-syntax 8 9 10 "use strict"; 11 12 function f(o) { 13 var result = []; 14 for (var i of Reflect.enumerate(Object(o))) { 15 result.push(i); 16 } 17 return result; 18 } 19 20 assertEquals(["0"], f("a")); 21 assertEquals(["0"], f("a")); 22 %OptimizeFunctionOnNextCall(f); 23 assertEquals(["0","1","2"], f("bla")); 24 25 // Test the lazy deopt points. 26 var keys = ["a", "b", "c", "d"]; 27 var has_keys = []; 28 var deopt_has = false; 29 var deopt_enum = false; 30 31 var handler = { 32 enumerate: function(target) { 33 if (deopt_enum) { 34 %DeoptimizeFunction(f2); 35 deopt_enum = false; 36 } 37 return keys; 38 }, 39 40 getPropertyDescriptor: function(k) { 41 if (deopt_has) { 42 %DeoptimizeFunction(f2); 43 deopt_has = false; 44 } 45 has_keys.push(k); 46 return {value: 10, configurable: true, writable: false, enumerable: true}; 47 } 48 }; 49 50 // TODO(neis,cbruni): Enable once the enumerate proxy trap is properly 51 // implemented. 52 // var proxy = new Proxy({}, handler); 53 // var o = {__proto__: proxy}; 54 // 55 // function f2(o) { 56 // var result = []; 57 // for (var i of Reflect.enumerate(o)) { 58 // result.push(i); 59 // } 60 // return result; 61 // } 62 // 63 // function check_f2() { 64 // assertEquals(keys, f2(o)); 65 // assertEquals(keys, has_keys); 66 // has_keys.length = 0; 67 // } 68 // 69 // check_f2(); 70 // check_f2(); 71 // Test lazy deopt after GetPropertyNamesFast 72 // %OptimizeFunctionOnNextCall(f2); 73 // deopt_enum = true; 74 // check_f2(); 75 // Test lazy deopt after FILTER_KEY 76 // %OptimizeFunctionOnNextCall(f2); 77 // deopt_has = true; 78 // check_f2(); 79
