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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
11 // with the distribution. | 11 // with the distribution. |
12 // * Neither the name of Google Inc. nor the names of its | 12 // * Neither the name of Google Inc. nor the names of its |
13 // contributors may be used to endorse or promote products derived | 13 // contributors may be used to endorse or promote products derived |
14 // from this software without specific prior written permission. | 14 // from this software without specific prior written permission. |
15 // | 15 // |
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | 16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | 17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | 18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | 19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | 20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | 21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | 22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | 23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | 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. | 26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 | 27 |
| 28 // Flags: --allow-natives-syntax |
| 29 |
28 // Test const initialization and assignments. | 30 // Test const initialization and assignments. |
29 function f() { | 31 function f() { |
30 var x = 42; | 32 var x = 42; |
31 while (true) { | 33 while (true) { |
32 const y = x; | 34 const y = x; |
33 if (--x == 0) return y; | 35 if (--x == 0) return y; |
34 } | 36 } |
35 } | 37 } |
36 | 38 |
37 function g() { | 39 function g() { |
38 const x = 42; | 40 const x = 42; |
39 x += 1; | 41 x += 1; |
40 return x; | 42 return x; |
41 } | 43 } |
42 | 44 |
43 for (var i = 0; i < 1000000; i++) { | 45 for (var i = 0; i < 5; i++) { |
44 f(); | 46 f(); |
45 g(); | 47 g(); |
46 } | 48 } |
47 | 49 |
| 50 %OptimizeFunctionOnNextCall(f); |
| 51 %OptimizeFunctionOnNextCall(g); |
| 52 |
48 assertEquals(42, f()); | 53 assertEquals(42, f()); |
49 assertEquals(42, g()); | 54 assertEquals(42, g()); |
50 | 55 |
51 | 56 |
52 function h(a, b) { | 57 function h(a, b) { |
53 var r = a + b; | 58 var r = a + b; |
54 const X = 42; | 59 const X = 42; |
55 return r + X; | 60 return r + X; |
56 } | 61 } |
57 | 62 |
58 for (var i=0; i<10000000; i++) f(1,2); | 63 for (var i = 0; i < 5; i++) h(1,2); |
| 64 |
| 65 %OptimizeFunctionOnNextCall(h); |
| 66 |
59 assertEquals(45, h(1,2)); | 67 assertEquals(45, h(1,2)); |
60 assertEquals("foo742", h("foo", 7)); | 68 assertEquals("foo742", h("foo", 7)); |
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