| // Copyright 2013 the V8 project authors. All rights reserved. |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are |
| // met: |
| // |
| // * Redistributions of source code must retain the above copyright |
| // notice, this list of conditions and the following disclaimer. |
| // * Redistributions in binary form must reproduce the above |
| // copyright notice, this list of conditions and the following |
| // disclaimer in the documentation and/or other materials provided |
| // with the distribution. |
| // * Neither the name of Google Inc. nor the names of its |
| // contributors may be used to endorse or promote products derived |
| // from this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| // Flags: --track-fields --track-double-fields --allow-natives-syntax |
| |
| // Test transitions caused by changes to field representations. |
| |
| function create_smi_object() { |
| var o = {}; |
| o.x = 1; |
| o.y = 2; |
| o.z = 3; |
| return o; |
| } |
| |
| var o1 = create_smi_object(); |
| var o2 = create_smi_object(); |
| |
| // o1,o2 are smi, smi, smi |
| assertTrue(%HaveSameMap(o1, o2)); |
| o1.y = 1.3; |
| // o1 is smi, double, smi |
| assertFalse(%HaveSameMap(o1, o2)); |
| o2.y = 1.5; |
| // o2 is smi, double, smi |
| assertTrue(%HaveSameMap(o1, o2)); |
| |
| // o3 is initialized as smi, double, smi |
| var o3 = create_smi_object(); |
| assertTrue(%HaveSameMap(o1, o3)); |
| |
| function set_large(o, v) { |
| o.x01 = v; o.x02 = v; o.x03 = v; o.x04 = v; o.x05 = v; o.x06 = v; o.x07 = v; |
| o.x08 = v; o.x09 = v; o.x10 = v; o.x11 = v; o.x12 = v; o.x13 = v; o.x14 = v; |
| o.x15 = v; o.x16 = v; o.x17 = v; o.x18 = v; o.x19 = v; o.x20 = v; o.x21 = v; |
| o.x22 = v; o.x23 = v; o.x24 = v; o.x25 = v; o.x26 = v; o.x27 = v; o.x28 = v; |
| o.x29 = v; o.x30 = v; o.x31 = v; o.x32 = v; o.x33 = v; o.x34 = v; o.x35 = v; |
| o.x36 = v; o.x37 = v; o.x38 = v; o.x39 = v; o.x40 = v; o.x41 = v; o.x42 = v; |
| o.y01 = v; o.y02 = v; o.y03 = v; o.y04 = v; o.y05 = v; o.y06 = v; o.y07 = v; |
| o.y08 = v; o.y09 = v; o.y10 = v; o.y11 = v; o.y12 = v; o.y13 = v; o.y14 = v; |
| o.y15 = v; o.y16 = v; o.y17 = v; o.y18 = v; o.y19 = v; o.y20 = v; o.y21 = v; |
| } |
| |
| // Check that large object migrations work. |
| var o4 = {}; |
| // All smi. |
| set_large(o4, 0); |
| assertTrue(%HasFastProperties(o4)); |
| // All double. |
| set_large(o4, 1.5); |
| // o5 is immediately allocated with doubles. |
| var o5 = {}; |
| set_large(o5, 0); |
| assertTrue(%HaveSameMap(o4, o5)); |
| |
| function create_smi_object2() { |
| var o = {}; |
| o.a = 1; |
| o.b = 2; |
| o.c = 3; |
| return o; |
| } |
| |
| // All smi |
| var o6 = create_smi_object2(); |
| var o7 = create_smi_object2(); |
| |
| assertTrue(%HaveSameMap(o6, o7)); |
| // Smi, double, smi. |
| o6.b = 1.5; |
| assertFalse(%HaveSameMap(o6, o7)); |
| // Smi, double, object. |
| o7.c = {}; |
| assertFalse(%HaveSameMap(o6, o7)); |
| // Smi, double, object. |
| o6.c = {}; |
| assertTrue(%HaveSameMap(o6, o7)); |