Ben Murdoch | 61f157c | 2016-09-16 13:49:30 +0100 | [diff] [blame] | 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 |
| 6 | |
| 7 | (function StoreHoleBitPattern() { |
| 8 | function g(src, dst, i) { |
| 9 | dst[i] = src[i]; |
| 10 | } |
| 11 | |
| 12 | var b = new ArrayBuffer(16); |
| 13 | var i32 = new Int32Array(b); |
| 14 | i32[0] = 0xFFF7FFFF; |
| 15 | i32[1] = 0xFFF7FFFF; |
| 16 | i32[3] = 0xFFF7FFFF; |
| 17 | i32[4] = 0xFFF7FFFF; |
| 18 | var f64 = new Float64Array(b); |
| 19 | |
| 20 | var a = [,0.1]; |
| 21 | |
| 22 | g(f64, a, 1); |
| 23 | g(f64, a, 1); |
| 24 | %OptimizeFunctionOnNextCall(g); |
| 25 | g(f64, a, 0); |
| 26 | |
| 27 | assertTrue(Number.isNaN(a[0])); |
| 28 | })(); |
| 29 | |
| 30 | |
| 31 | (function ConvertHoleToNumberAndStore() { |
| 32 | function g(a, i) { |
| 33 | var x = a[i]; |
| 34 | a[i] = +x; |
| 35 | } |
| 36 | |
| 37 | var a=[,0.1]; |
| 38 | g(a, 1); |
| 39 | g(a, 1); |
| 40 | %OptimizeFunctionOnNextCall(g); |
| 41 | g(a, 0); |
| 42 | assertTrue(Number.isNaN(a[0])); |
| 43 | })(); |