1// Copyright 2013 the V8 project authors. All rights reserved. 2// Redistribution and use in source and binary forms, with or without 3// modification, are permitted provided that the following conditions are 4// met: 5// 6// * Redistributions of source code must retain the above copyright 7// notice, this list of conditions and the following disclaimer. 8// * Redistributions in binary form must reproduce the above 9// copyright notice, this list of conditions and the following 10// disclaimer in the documentation and/or other materials provided 11// with the distribution. 12// * Neither the name of Google Inc. nor the names of its 13// contributors may be used to endorse or promote products derived 14// from this software without specific prior written permission. 15// 16// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 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. 27 28// Flags: --allow-natives-syntax 29 30// A regression test for a register allocation bug triggered by 31// http://n3emscripten.appspot.com/dragons_asmjs.html. Note that the test is 32// very fragile, but without a proper testing infrastructure for the register 33// allocator we can't really do much better. 34// 35// The code below is a slighty modified version of Emscripten-translated C++ 36// code for the standard textbook algorithm for frustum culling of an object 37// with a given bounding box. 38// 39// The key problem for the underlying bug was a value with a long live range 40// which is used often (a context) and a lot of live ranges starting at the same 41// point. The bug was that none of the ranges were allowed to be spilled, so the 42// allocator was splitting a live range at its start and re-added the very same 43// range into the list of unallocated ranges, making no progress. 44 45(function () { 46 function __ZNK4Math5plane3dotERKNS_6float4E(i1, i2) { 47 i1 = i1 | 0; 48 i2 = i2 | 0; 49 return +(+HEAPF32[i1 >> 2] * +HEAPF32[i2 >> 2] + +HEAPF32[i1 + 4 >> 2] * +HEAPF32[i2 + 4 >> 2] + +HEAPF32[i1 + 8 >> 2] * +HEAPF32[i2 + 8 >> 2] + +HEAPF32[i1 + 12 >> 2] * +HEAPF32[i2 + 12 >> 2]); 50 } 51 52 function __ZNK4Math7frustum8clipmaskERKNS_5pointE(i1, i2) { 53 i1 = i1 | 0; 54 i2 = i2 | 0; 55 var i3 = 0, i4 = 0; 56 i3 = i2 | 0; 57 i2 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 | 0, i3) > 0.0 & 1; 58 i4 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 + 16 | 0, i3) > 0.0 ? i2 | 2 : i2; 59 i2 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 + 32 | 0, i3) > 0.0 ? i4 | 4 : i4; 60 i4 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 + 48 | 0, i3) > 0.0 ? i2 | 8 : i2; 61 i2 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 + 64 | 0, i3) > 0.0 ? i4 | 16 : i4; 62 return (+__ZNK4Math5plane3dotERKNS_6float4E(i1 + 80 | 0, i3) > 0.0 ? i2 | 32 : i2) | 0; 63 } 64 65 function __ZNK4Math7frustum10clipstatusERKNS_4bboxE(i1, i2) { 66 i1 = i1 | 0; 67 i2 = i2 | 0; 68 var i3 = 0, i4 = 0, i5 = 0, i6 = 0, i7 = 0, i8 = 0, i9 = 0, i10 = 0, i11 = 0, i12 = 0, i13 = 0, i14 = 0, i15 = 0, i16 = 0, d17 = 0.0, d18 = 0.0, i19 = 0, i20 = 0, i21 = 0, i22 = 0; 69 i3 = STACKTOP; 70 STACKTOP = STACKTOP + 16 | 0; 71 i4 = i3 | 0; 72 i5 = i4 | 0; 73 HEAPF32[i5 >> 2] = 0.0; 74 i6 = i4 + 4 | 0; 75 HEAPF32[i6 >> 2] = 0.0; 76 i7 = i4 + 8 | 0; 77 HEAPF32[i7 >> 2] = 0.0; 78 i8 = i4 + 12 | 0; 79 HEAPF32[i8 >> 2] = 1.0; 80 i9 = i2 | 0; 81 i10 = i2 + 4 | 0; 82 i11 = i2 + 8 | 0; 83 i12 = i2 + 20 | 0; 84 i13 = i2 + 16 | 0; 85 i14 = i2 + 24 | 0; 86 i2 = 65535; 87 i15 = 0; 88 i16 = 0; 89 while (1) { 90 if ((i16 | 0) == 1) { 91 d17 = +HEAPF32[i12 >> 2]; 92 d18 = +HEAPF32[i11 >> 2]; 93 HEAPF32[i5 >> 2] = +HEAPF32[i9 >> 2]; 94 HEAPF32[i6 >> 2] = d17; 95 HEAPF32[i7 >> 2] = d18; 96 HEAPF32[i8 >> 2] = 1.0; 97 } else if ((i16 | 0) == 4) { 98 HEAPF32[i5 >> 2] = +HEAPF32[i13 >> 2]; 99 HEAPF32[i6 >> 2] = +HEAPF32[i12 >> 2]; 100 HEAPF32[i7 >> 2] = +HEAPF32[i14 >> 2]; 101 HEAPF32[i8 >> 2] = 1.0; 102 } else if ((i16 | 0) == 6) { 103 d18 = +HEAPF32[i10 >> 2]; 104 d17 = +HEAPF32[i14 >> 2]; 105 HEAPF32[i5 >> 2] = +HEAPF32[i9 >> 2]; 106 HEAPF32[i6 >> 2] = d18; 107 HEAPF32[i7 >> 2] = d17; 108 HEAPF32[i8 >> 2] = 1.0; 109 } else if ((i16 | 0) == 5) { 110 d17 = +HEAPF32[i12 >> 2]; 111 d18 = +HEAPF32[i14 >> 2]; 112 HEAPF32[i5 >> 2] = +HEAPF32[i9 >> 2]; 113 HEAPF32[i6 >> 2] = d17; 114 HEAPF32[i7 >> 2] = d18; 115 HEAPF32[i8 >> 2] = 1.0; 116 } else if ((i16 | 0) == 3) { 117 d18 = +HEAPF32[i10 >> 2]; 118 d17 = +HEAPF32[i11 >> 2]; 119 HEAPF32[i5 >> 2] = +HEAPF32[i13 >> 2]; 120 HEAPF32[i6 >> 2] = d18; 121 HEAPF32[i7 >> 2] = d17; 122 HEAPF32[i8 >> 2] = 1.0; 123 } else if ((i16 | 0) == 0) { 124 HEAPF32[i5 >> 2] = +HEAPF32[i9 >> 2]; 125 HEAPF32[i6 >> 2] = +HEAPF32[i10 >> 2]; 126 HEAPF32[i7 >> 2] = +HEAPF32[i11 >> 2]; 127 HEAPF32[i8 >> 2] = 1.0; 128 } else if ((i16 | 0) == 2) { 129 d17 = +HEAPF32[i12 >> 2]; 130 d18 = +HEAPF32[i11 >> 2]; 131 HEAPF32[i5 >> 2] = +HEAPF32[i13 >> 2]; 132 HEAPF32[i6 >> 2] = d17; 133 HEAPF32[i7 >> 2] = d18; 134 HEAPF32[i8 >> 2] = 1.0; 135 } else if ((i16 | 0) == 7) { 136 d18 = +HEAPF32[i10 >> 2]; 137 d17 = +HEAPF32[i14 >> 2]; 138 HEAPF32[i5 >> 2] = +HEAPF32[i13 >> 2]; 139 HEAPF32[i6 >> 2] = d18; 140 HEAPF32[i7 >> 2] = d17; 141 HEAPF32[i8 >> 2] = 1.0; 142 } 143 i19 = __ZNK4Math7frustum8clipmaskERKNS_5pointE(i1, i4) | 0; 144 i20 = i19 & i2; 145 i21 = i19 | i15; 146 i19 = i16 + 1 | 0; 147 if ((i19 | 0) == 8) { 148 break; 149 } else { 150 i2 = i20; 151 i15 = i21; 152 i16 = i19; 153 } 154 } 155 if ((i21 | 0) == 0) { 156 i22 = 0; 157 STACKTOP = i3; 158 return i22 | 0; 159 } 160 i22 = (i20 | 0) == 0 ? 2 : 1; 161 STACKTOP = i3; 162 return i22 | 0; 163 } 164 165 // ----------------------------------------------------------------- 166 167 var STACKTOP = 0; 168 var HEAPF32 = new Float32Array(1000); 169 170 for (var i = 0; i < HEAPF32.length; i++) { 171 HEAPF32[i] = 1.0; 172 } 173 174 __ZNK4Math7frustum10clipstatusERKNS_4bboxE(0, 0); 175 __ZNK4Math7frustum10clipstatusERKNS_4bboxE(0, 0); 176 __ZNK4Math7frustum10clipstatusERKNS_4bboxE(0, 0); 177 %OptimizeFunctionOnNextCall(__ZNK4Math7frustum10clipstatusERKNS_4bboxE); 178 __ZNK4Math7frustum10clipstatusERKNS_4bboxE(0, 0); 179})(); 180