Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
| 2 | // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved. |
| 3 | // |
| 4 | // Redistribution and use in source and binary forms, with or without |
| 5 | // modification, are permitted provided that the following conditions |
| 6 | // are met: |
| 7 | // 1. Redistributions of source code must retain the above copyright |
| 8 | // notice, this list of conditions and the following disclaimer. |
| 9 | // 2. Redistributions in binary form must reproduce the above copyright |
| 10 | // notice, this list of conditions and the following disclaimer in the |
| 11 | // documentation and/or other materials provided with the distribution. |
| 12 | // |
| 13 | // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY |
| 14 | // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
| 15 | // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
| 16 | // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
| 17 | // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
| 18 | // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 19 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON |
| 20 | // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 21 | // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS |
| 22 | // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 23 | |
| 24 | description( |
| 25 | "This tests that register allocation still works under register pressure induced by inlining, out-of-line function calls (i.e. unconditional register flushing), and slow paths for object creation (i.e. conditional register flushing)." |
| 26 | ); |
| 27 | |
| 28 | // Inlineable constructor. |
| 29 | function foo(a, b, c) { |
| 30 | this.a = a; |
| 31 | this.b = b; |
| 32 | this.c = c; |
| 33 | } |
| 34 | |
| 35 | // Non-inlineable function. This relies on a size limit for inlining, but still |
| 36 | // produces integers. It also relies on the VM not reasoning about Math.log deeply |
| 37 | // enough to find some way of optimizing this code to be small enough to inline. |
| 38 | function bar(a, b) { |
| 39 | a += b; |
| 40 | a -= b; |
| 41 | b ^= a; |
| 42 | a += Math.log(b); |
| 43 | b += a; |
| 44 | b -= a; |
| 45 | a ^= b; |
| 46 | a += b; |
| 47 | a -= b; |
| 48 | b ^= a; |
| 49 | a += Math.log(b); |
| 50 | b += a; |
| 51 | b -= a; |
| 52 | a ^= b; |
| 53 | a += b; |
| 54 | a -= b; |
| 55 | b ^= a; |
| 56 | a += Math.log(b); |
| 57 | b += a; |
| 58 | b -= a; |
| 59 | a ^= b; |
| 60 | a += b; |
| 61 | a -= b; |
| 62 | b ^= a; |
| 63 | a += Math.log(b); |
| 64 | b += a; |
| 65 | b -= a; |
| 66 | a ^= b; |
| 67 | a += b; |
| 68 | a -= b; |
| 69 | b ^= a; |
| 70 | a += Math.log(b); |
| 71 | b += a; |
| 72 | b -= a; |
| 73 | a ^= b; |
| 74 | a += b; |
| 75 | a -= b; |
| 76 | b ^= a; |
| 77 | a += Math.log(b); |
| 78 | b += a; |
| 79 | b -= a; |
| 80 | a ^= b; |
| 81 | a += b; |
| 82 | a -= b; |
| 83 | b ^= a; |
| 84 | a += Math.log(b); |
| 85 | b += a; |
| 86 | b -= a; |
| 87 | a ^= b; |
| 88 | a += b; |
| 89 | a -= b; |
| 90 | b ^= a; |
| 91 | a += Math.log(b); |
| 92 | b += a; |
| 93 | b -= a; |
| 94 | a ^= b; |
| 95 | a += b; |
| 96 | a -= b; |
| 97 | b ^= a; |
| 98 | a += Math.log(b); |
| 99 | b += a; |
| 100 | b -= a; |
| 101 | a ^= b; |
| 102 | a += b; |
| 103 | a -= b; |
| 104 | b ^= a; |
| 105 | a += Math.log(b); |
| 106 | b += a; |
| 107 | b -= a; |
| 108 | a ^= b; |
| 109 | a += b; |
| 110 | a -= b; |
| 111 | b ^= a; |
| 112 | a += Math.log(b); |
| 113 | b += a; |
| 114 | b -= a; |
| 115 | a ^= b; |
| 116 | a += b; |
| 117 | a -= b; |
| 118 | b ^= a; |
| 119 | a += Math.log(b); |
| 120 | b += a; |
| 121 | b -= a; |
| 122 | a ^= b; |
| 123 | a += b; |
| 124 | a -= b; |
| 125 | b ^= a; |
| 126 | a += Math.log(b); |
| 127 | b += a; |
| 128 | b -= a; |
| 129 | a ^= b; |
| 130 | a += b; |
| 131 | a -= b; |
| 132 | b ^= a; |
| 133 | a += Math.log(b); |
| 134 | b += a; |
| 135 | b -= a; |
| 136 | a ^= b; |
| 137 | a += b; |
| 138 | a -= b; |
| 139 | b ^= a; |
| 140 | a += Math.log(b); |
| 141 | b += a; |
| 142 | b -= a; |
| 143 | a ^= b; |
| 144 | a += b; |
| 145 | a -= b; |
| 146 | b ^= a; |
| 147 | a += Math.log(b); |
| 148 | b += a; |
| 149 | b -= a; |
| 150 | a ^= b; |
| 151 | return (a - b) | 0; |
| 152 | } |
| 153 | |
| 154 | // Function into which we will inline foo but not bar. |
| 155 | function baz(a, b) { |
| 156 | return new foo(bar(2 * a + 1, b - 1), bar(2 * a, b - 1), a); |
| 157 | } |
| 158 | |
| 159 | // Do the test. It's crucial that o.a, o.b, and o.c are checked on each |
| 160 | // loop iteration. |
| 161 | for (var i = 0; i < 1000; ++i) { |
| 162 | var o = baz(i, i + 1); |
| 163 | shouldBe("o.a", "bar(2 * i + 1, i)"); |
| 164 | shouldBe("o.b", "bar(2 * i, i)"); |
| 165 | shouldBe("o.c", "i"); |
| 166 | } |