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 deopt_trigger = 0; 31 side_effect = 0; 32 33 function test(a, b, c, d, e, v) { 34 // This test expects some specific input values. 35 assertEquals(10.0, a); 36 assertEquals(20.0, b); 37 assertEquals(30.0, c); 38 assertEquals(40.0, d); 39 assertEquals(50.0, e); 40 assertEquals(1.5, v); 41 42 // Perform a few double calculations. 43 a = a * 0.1; 44 b = b * 0.2; 45 c = c * 0.3; 46 d = d * 0.4; 47 e = e * 0.5; 48 49 // Write to a field of a global object. As for any side effect, a HSimulate 50 // will be introduced after the instructions to support this. If we deopt 51 // later in this function, the execution will resume in full-codegen after 52 // this point. 53 side_effect++; 54 // The following field of the global object will be deleted to force a deopt. 55 // If we use type feedback to deopt, then tests ran with --stress-opt will 56 // not deopt after a few iteration. 57 // If we use %DeoptimizeFunction, all values will be on the frame due to the 58 // call and we will not exercise the translation mechanism handling fp 59 // registers. 60 deopt_trigger = v; 61 62 // Do a few more calculations using the previous values after our deopt point 63 // so the floating point registers which hold those values are recorded in the 64 // environment and will be used during deoptimization. 65 a = a * v; 66 b = b * v; 67 c = c * v; 68 d = d * v; 69 e = e * v; 70 71 // Check that we got the expected results. 72 assertEquals(1.5, a); 73 assertEquals(6, b); 74 assertEquals(13.5, c); 75 assertEquals(24, d); 76 assertEquals(37.5, e); 77 } 78 79 80 test(10.0, 20.0, 30.0, 40.0, 50.0, 1.5); 81 test(10.0, 20.0, 30.0, 40.0, 50.0, 1.5); 82 %OptimizeFunctionOnNextCall(test); 83 test(10.0, 20.0, 30.0, 40.0, 50.0, 1.5); 84 assertTrue(2 != %GetOptimizationStatus(test)); 85 86 // By deleting the field we are forcing the code to deopt when the field is 87 // read on next execution. 88 delete deopt_trigger; 89 test(10.0, 20.0, 30.0, 40.0, 50.0, 1.5); 90 assertTrue(1 != %GetOptimizationStatus(test)); 91
