1 // Copyright 2011 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 // Test that the Lithium environment iterator does stop iteration early. 31 "use strict"; 32 33 function f0() { 34 return f1('literal', true); 35 } 36 37 function f1(x, y) { 38 return f2(x, y); 39 } 40 41 // Because it's strict, f2 has an environment containing only the constants 42 // undefined, 'literal', and false. Bug 1423 would cause environment 43 // iteration to stop early. 44 // 45 // Bug manifests as UNREACHABLE code (due to an unallocated register) in 46 // debug builds. 47 function f2(x, y) { 48 if (y) { 49 if (f3(x, 'other-literal')) { 50 return 0; 51 } else { 52 return 1; 53 } 54 } else { 55 return 2; 56 } 57 } 58 59 function f3(x, y) { 60 return x === y; 61 } 62 63 for (var i = 0; i < 5; ++i) f0(); 64 %OptimizeFunctionOnNextCall(f0); 65 assertEquals(1, f0()); 66