Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 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)); |