Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2013 the V8 project authors. All rights reserved. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 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 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 28 | // Flags: --allow-natives-syntax --load-elimination |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 29 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 30 | // Test local load elimination of redundant loads and stores. |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 31 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 32 | function B(x, y) { |
| 33 | this.x = x; |
| 34 | this.y = y; |
| 35 | return this; |
Steve Block | 44f0eee | 2011-05-26 01:26:41 +0100 | [diff] [blame] | 36 | } |
Steve Block | a7e24c1 | 2009-10-30 11:49:00 +0000 | [diff] [blame] | 37 | |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 38 | function test_params1(a, b) { |
| 39 | var i = a.x; |
| 40 | var j = a.x; |
| 41 | var k = b.x; |
| 42 | var l = b.x; |
| 43 | return i + j + k + l; |
| 44 | } |
| 45 | |
| 46 | assertEquals(14, test_params1(new B(3, 4), new B(4, 5))); |
| 47 | assertEquals(110, test_params1(new B(11, 7), new B(44, 8))); |
| 48 | |
| 49 | %OptimizeFunctionOnNextCall(test_params1); |
| 50 | |
| 51 | assertEquals(6, test_params1(new B(1, 7), new B(2, 8))); |
| 52 | |
| 53 | function test_params2(a, b) { |
| 54 | var o = new B(a + 1, b); |
| 55 | o.x = a; |
| 56 | var i = o.x; |
| 57 | o.x = a; |
| 58 | var j = o.x; |
| 59 | o.x = b; |
| 60 | var k = o.x; |
| 61 | o.x = b; |
| 62 | var l = o.x; |
| 63 | return i + j + k + l; |
| 64 | } |
| 65 | |
| 66 | assertEquals(14, test_params2(3, 4)); |
| 67 | assertEquals(110, test_params2(11, 44)); |
| 68 | |
| 69 | %OptimizeFunctionOnNextCall(test_params2); |
| 70 | |
| 71 | assertEquals(6, test_params2(1, 2)); |