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 // Flags: --allow-natives-syntax 6 7 var obj = %GetUndetectable(); 8 9 function shouldNotBeTaken() { 10 fail("Undetectable branch should not be taken", "branch was taken"); 11 } 12 13 function shouldBeTaken() { 14 fail("Inverted Undetectable branch should be taken", "branch was not taken"); 15 } 16 17 function testCompares() { 18 assertTrue(!obj); 19 assertFalse(!!obj); 20 assertFalse(obj == true); 21 assertFalse(obj == false); 22 assertFalse(obj === true); 23 assertFalse(obj === false); 24 assertEquals(2, obj ? 1 : 2); 25 assertEquals(obj, true && obj); 26 assertEquals(obj, false || obj); 27 } 28 29 function testIfs() { 30 if (obj) { 31 shouldNotBeTaken(); 32 } 33 34 if (obj) { 35 shouldNotBeTaken(); 36 } else { 37 // do nothing 38 } 39 40 if (!obj) { 41 // do nothing 42 } else { 43 shouldBeTaken(); 44 } 45 } 46 47 function testWhiles() { 48 while (obj) { 49 shouldNotBeTaken(); 50 } 51 52 var i = 0; 53 while (!obj) { 54 i++; 55 break; 56 } 57 58 assertEquals(1, i); 59 } 60 61 function testFors() { 62 for (var i = 0; obj; i++) { 63 shouldNotBeTaken(); 64 } 65 66 var j = 0; 67 for (var i = 0; !obj; i++) { 68 j++; 69 break; 70 } 71 72 assertEquals(1, j); 73 } 74 75 for (var j = 0; j < 5; j++) { 76 testCompares(); 77 testIfs(); 78 testWhiles(); 79 testFors(); 80 81 if (j == 3) { 82 %OptimizeFunctionOnNextCall(testCompares); 83 %OptimizeFunctionOnNextCall(testIfs); 84 %OptimizeFunctionOnNextCall(testWhiles); 85 %OptimizeFunctionOnNextCall(testFors); 86 } 87 } 88
