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      1 // Copyright 2011 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 // Regression test for GVN on field loads.
     31 
     32 function bar() {}
     33 
     34 // Make sure there is a transition on adding "bar" inobject property.
     35 var b = new bar();
     36 b.bar = "bar";
     37 
     38 function test(a) {
     39   var b = new Array(10);
     40   for (var i = 0; i < 10; i++) {
     41     b[i] = new bar();
     42   }
     43 
     44   for (var i = 0; i < 10; i++) {
     45     b[i].bar = a.foo;
     46   }
     47 }
     48 
     49 // Create an object with fast backing store properties.
     50 var a = {};
     51 a.p1 = "";
     52 a.p2 = "";
     53 a.p3 = "";
     54 a.p4 = "";
     55 a.p5 = "";
     56 a.p6 = "";
     57 a.p7 = "";
     58 a.p8 = "";
     59 a.p9 = "";
     60 a.p10 = "";
     61 a.p11 = "";
     62 a.foo = "foo";
     63 for (var i = 0; i < 5; i++) {
     64  test(a);
     65 }
     66 %OptimizeFunctionOnNextCall(test);
     67 test(a);
     68 
     69 test("");
     70