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 --smi-only-arrays --expose-gc 29 // Flags: --track-allocation-sites --noalways-opt 30 31 // Test element kind of objects. 32 // Since --smi-only-arrays affects builtins, its default setting at compile 33 // time sticks if built with snapshot. If --smi-only-arrays is deactivated 34 // by default, only a no-snapshot build actually has smi-only arrays enabled 35 // in this test case. Depending on whether smi-only arrays are actually 36 // enabled, this test takes the appropriate code path to check smi-only arrays. 37 38 // support_smi_only_arrays = %HasFastSmiElements(new Array(1,2,3,4,5,6,7,8)); 39 support_smi_only_arrays = true; 40 41 if (support_smi_only_arrays) { 42 print("Tests include smi-only arrays."); 43 } else { 44 print("Tests do NOT include smi-only arrays."); 45 } 46 47 if (support_smi_only_arrays) { 48 49 function get_literal(x) { 50 var literal = [1, 2, x]; 51 return literal; 52 } 53 54 get_literal(3); 55 get_literal(3); 56 %OptimizeFunctionOnNextCall(get_literal); 57 a = get_literal(3); 58 assertOptimized(get_literal); 59 assertTrue(%HasFastSmiElements(a)); 60 a[0] = 3.5; 61 62 // We should have transitioned the boilerplate array to double, and 63 // crankshafted code should de-opt on the unexpected elements kind 64 b = get_literal(3); 65 assertTrue(%HasFastDoubleElements(b)); 66 assertEquals([1, 2, 3], b); 67 assertUnoptimized(get_literal); 68 69 // Optimize again 70 get_literal(3); 71 %OptimizeFunctionOnNextCall(get_literal); 72 b = get_literal(3); 73 assertTrue(%HasFastDoubleElements(b)); 74 assertOptimized(get_literal); 75 } 76
