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| 1 // Copyright 2016 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 --harmony-tailcalls --stack-size=100 |
| 6 |
| 7 // |
| 8 // Tail calls work only in strict mode. |
| 9 // |
| 10 (function() { |
| 11 function f(n) { |
| 12 if (n <= 0) { |
| 13 return "foo"; |
| 14 } |
| 15 return f(n - 1); |
| 16 } |
| 17 assertThrows(()=>{ f(1e6) }); |
| 18 })(); |
| 19 |
| 20 |
| 21 // |
| 22 // Tail call normal functions. |
| 23 // |
| 24 (function() { |
| 25 "use strict"; |
| 26 function f(n) { |
| 27 if (n <= 0) { |
| 28 return "foo"; |
| 29 } |
| 30 return f(n - 1); |
| 31 } |
| 32 assertEquals("foo", f(1e6)); |
| 33 })(); |
| 34 |
| 35 |
| 36 (function() { |
| 37 "use strict"; |
| 38 function f(n){ |
| 39 if (n <= 0) { |
| 40 return "foo"; |
| 41 } |
| 42 return g(n - 1); |
| 43 } |
| 44 function g(n){ |
| 45 if (n <= 0) { |
| 46 return "bar"; |
| 47 } |
| 48 return f(n - 1); |
| 49 } |
| 50 assertEquals("foo", f(1e6)); |
| 51 assertEquals("bar", f(1e6 + 1)); |
| 52 })(); |
| 53 |
| 54 |
| 55 // |
| 56 // Tail call bound functions. |
| 57 // |
| 58 (function() { |
| 59 "use strict"; |
| 60 function f0(n) { |
| 61 if (n <= 0) { |
| 62 return "foo"; |
| 63 } |
| 64 return f(n - 1); |
| 65 } |
| 66 var f = f0.bind({}); |
| 67 assertEquals("foo", f(1e6)); |
| 68 })(); |
| 69 |
| 70 |
| 71 (function() { |
| 72 "use strict"; |
| 73 function f0(n){ |
| 74 if (n <= 0) { |
| 75 return "foo"; |
| 76 } |
| 77 return g(n - 1); |
| 78 } |
| 79 function g0(n){ |
| 80 if (n <= 0) { |
| 81 return "bar"; |
| 82 } |
| 83 return f(n - 1); |
| 84 } |
| 85 var f = f0.bind({}); |
| 86 var g = g0.bind({}); |
| 87 |
| 88 assertEquals("foo", f(1e6)); |
| 89 assertEquals("bar", f(1e6 + 1)); |
| 90 })(); |
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