// Copyright 2013 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: // // * Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // * Redistributions in binary form must reproduce the above // copyright notice, this list of conditions and the following // disclaimer in the documentation and/or other materials provided // with the distribution. // * Neither the name of Google Inc. nor the names of its // contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // Flags: --allow-natives-syntax // A regression test for a register allocation bug triggered by // http://n3emscripten.appspot.com/dragons_asmjs.html. Note that the test is // very fragile, but without a proper testing infrastructure for the register // allocator we can't really do much better. // // The code below is a slighty modified version of Emscripten-translated C++ // code for the standard textbook algorithm for frustum culling of an object // with a given bounding box. // // The key problem for the underlying bug was a value with a long live range // which is used often (a context) and a lot of live ranges starting at the same // point. The bug was that none of the ranges were allowed to be spilled, so the // allocator was splitting a live range at its start and re-added the very same // range into the list of unallocated ranges, making no progress. (function () { function __ZNK4Math5plane3dotERKNS_6float4E(i1, i2) { i1 = i1 | 0; i2 = i2 | 0; 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]); } function __ZNK4Math7frustum8clipmaskERKNS_5pointE(i1, i2) { i1 = i1 | 0; i2 = i2 | 0; var i3 = 0, i4 = 0; i3 = i2 | 0; i2 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 | 0, i3) > 0.0 & 1; i4 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 + 16 | 0, i3) > 0.0 ? i2 | 2 : i2; i2 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 + 32 | 0, i3) > 0.0 ? i4 | 4 : i4; i4 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 + 48 | 0, i3) > 0.0 ? i2 | 8 : i2; i2 = +__ZNK4Math5plane3dotERKNS_6float4E(i1 + 64 | 0, i3) > 0.0 ? i4 | 16 : i4; return (+__ZNK4Math5plane3dotERKNS_6float4E(i1 + 80 | 0, i3) > 0.0 ? i2 | 32 : i2) | 0; } function __ZNK4Math7frustum10clipstatusERKNS_4bboxE(i1, i2) { i1 = i1 | 0; i2 = i2 | 0; 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; i3 = STACKTOP; STACKTOP = STACKTOP + 16 | 0; i4 = i3 | 0; i5 = i4 | 0; HEAPF32[i5 >> 2] = 0.0; i6 = i4 + 4 | 0; HEAPF32[i6 >> 2] = 0.0; i7 = i4 + 8 | 0; HEAPF32[i7 >> 2] = 0.0; i8 = i4 + 12 | 0; HEAPF32[i8 >> 2] = 1.0; i9 = i2 | 0; i10 = i2 + 4 | 0; i11 = i2 + 8 | 0; i12 = i2 + 20 | 0; i13 = i2 + 16 | 0; i14 = i2 + 24 | 0; i2 = 65535; i15 = 0; i16 = 0; while (1) { if ((i16 | 0) == 1) { d17 = +HEAPF32[i12 >> 2]; d18 = +HEAPF32[i11 >> 2]; HEAPF32[i5 >> 2] = +HEAPF32[i9 >> 2]; HEAPF32[i6 >> 2] = d17; HEAPF32[i7 >> 2] = d18; HEAPF32[i8 >> 2] = 1.0; } else if ((i16 | 0) == 4) { HEAPF32[i5 >> 2] = +HEAPF32[i13 >> 2]; HEAPF32[i6 >> 2] = +HEAPF32[i12 >> 2]; HEAPF32[i7 >> 2] = +HEAPF32[i14 >> 2]; HEAPF32[i8 >> 2] = 1.0; } else if ((i16 | 0) == 6) { d18 = +HEAPF32[i10 >> 2]; d17 = +HEAPF32[i14 >> 2]; HEAPF32[i5 >> 2] = +HEAPF32[i9 >> 2]; HEAPF32[i6 >> 2] = d18; HEAPF32[i7 >> 2] = d17; HEAPF32[i8 >> 2] = 1.0; } else if ((i16 | 0) == 5) { d17 = +HEAPF32[i12 >> 2]; d18 = +HEAPF32[i14 >> 2]; HEAPF32[i5 >> 2] = +HEAPF32[i9 >> 2]; HEAPF32[i6 >> 2] = d17; HEAPF32[i7 >> 2] = d18; HEAPF32[i8 >> 2] = 1.0; } else if ((i16 | 0) == 3) { d18 = +HEAPF32[i10 >> 2]; d17 = +HEAPF32[i11 >> 2]; HEAPF32[i5 >> 2] = +HEAPF32[i13 >> 2]; HEAPF32[i6 >> 2] = d18; HEAPF32[i7 >> 2] = d17; HEAPF32[i8 >> 2] = 1.0; } else if ((i16 | 0) == 0) { HEAPF32[i5 >> 2] = +HEAPF32[i9 >> 2]; HEAPF32[i6 >> 2] = +HEAPF32[i10 >> 2]; HEAPF32[i7 >> 2] = +HEAPF32[i11 >> 2]; HEAPF32[i8 >> 2] = 1.0; } else if ((i16 | 0) == 2) { d17 = +HEAPF32[i12 >> 2]; d18 = +HEAPF32[i11 >> 2]; HEAPF32[i5 >> 2] = +HEAPF32[i13 >> 2]; HEAPF32[i6 >> 2] = d17; HEAPF32[i7 >> 2] = d18; HEAPF32[i8 >> 2] = 1.0; } else if ((i16 | 0) == 7) { d18 = +HEAPF32[i10 >> 2]; d17 = +HEAPF32[i14 >> 2]; HEAPF32[i5 >> 2] = +HEAPF32[i13 >> 2]; HEAPF32[i6 >> 2] = d18; HEAPF32[i7 >> 2] = d17; HEAPF32[i8 >> 2] = 1.0; } i19 = __ZNK4Math7frustum8clipmaskERKNS_5pointE(i1, i4) | 0; i20 = i19 & i2; i21 = i19 | i15; i19 = i16 + 1 | 0; if ((i19 | 0) == 8) { break; } else { i2 = i20; i15 = i21; i16 = i19; } } if ((i21 | 0) == 0) { i22 = 0; STACKTOP = i3; return i22 | 0; } i22 = (i20 | 0) == 0 ? 2 : 1; STACKTOP = i3; return i22 | 0; } // ----------------------------------------------------------------- var STACKTOP = 0; var HEAPF32 = new Float32Array(1000); for (var i = 0; i < HEAPF32.length; i++) { HEAPF32[i] = 1.0; } %PrepareFunctionForOptimization(__ZNK4Math7frustum10clipstatusERKNS_4bboxE); __ZNK4Math7frustum10clipstatusERKNS_4bboxE(0, 0); __ZNK4Math7frustum10clipstatusERKNS_4bboxE(0, 0); __ZNK4Math7frustum10clipstatusERKNS_4bboxE(0, 0); %OptimizeFunctionOnNextCall(__ZNK4Math7frustum10clipstatusERKNS_4bboxE); __ZNK4Math7frustum10clipstatusERKNS_4bboxE(0, 0); })();