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| 1 // Copyright 2017 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 --opt --no-always-opt |
| 6 |
| 7 (function() { |
| 8 function foo(i) { return "a".charAt(i); } |
| 9 |
| 10 assertEquals("a", foo(0)); |
| 11 assertEquals("a", foo(0)); |
| 12 assertEquals("", foo(1)); |
| 13 %OptimizeFunctionOnNextCall(foo); |
| 14 assertEquals("", foo(1)); |
| 15 assertOptimized(foo); |
| 16 })(); |
| 17 |
| 18 (function() { |
| 19 function foo(i) { return "a".charCodeAt(i); } |
| 20 |
| 21 assertEquals(97, foo(0)); |
| 22 assertEquals(97, foo(0)); |
| 23 assertEquals(NaN, foo(1)); |
| 24 %OptimizeFunctionOnNextCall(foo); |
| 25 assertEquals(NaN, foo(1)); |
| 26 assertOptimized(foo); |
| 27 })(); |
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