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      1 // Copyright 2013 the V8 project authors. All rights reserved.
      2 // Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
      3 //
      4 // Redistribution and use in source and binary forms, with or without
      5 // modification, are permitted provided that the following conditions
      6 // are met:
      7 // 1.  Redistributions of source code must retain the above copyright
      8 //     notice, this list of conditions and the following disclaimer.
      9 // 2.  Redistributions in binary form must reproduce the above copyright
     10 //     notice, this list of conditions and the following disclaimer in the
     11 //     documentation and/or other materials provided with the distribution.
     12 //
     13 // THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
     14 // EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     15 // WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
     16 // DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
     17 // DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
     18 // (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
     19 // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
     20 // ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     21 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
     22 // SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     23 
     24 description(
     25 "Tests whether peephole optimizations on bytecode properly deal with local registers."
     26 );
     27 
     28 function if_less_test()
     29 {
     30     var a = 0;
     31     var b = 2;
     32     if (a = 1 < 2)
     33         return a == 1;
     34 }
     35 
     36 shouldBeTrue("if_less_test()");
     37 
     38 function if_else_less_test()
     39 {
     40     var a = 0;
     41     var b = 2;
     42     if (a = 1 < 2)
     43         return a == 1;
     44     else
     45         return false;
     46 }
     47 
     48 shouldBeTrue("if_else_less_test()");
     49 
     50 function conditional_less_test()
     51 {
     52     var a = 0;
     53     var b = 2;
     54     return (a = 1 < 2) ? a == 1 : false;
     55 }
     56 
     57 shouldBeTrue("conditional_less_test()");
     58 
     59 function logical_and_less_test()
     60 {
     61     var a = 0;
     62     var b = 2;
     63     return (a = 1 < 2) && a == 1;
     64 }
     65 
     66 shouldBeTrue("logical_and_less_test()");
     67 
     68 function logical_or_less_test()
     69 {
     70     var a = 0;
     71     var b = 2;
     72     var result = (a = 1 < 2) || a == 1;
     73     return a == 1;
     74 }
     75 
     76 shouldBeTrue("logical_or_less_test()");
     77 
     78 function do_while_less_test()
     79 {
     80     var a = 0;
     81     var count = 0;
     82     do {
     83         if (count == 1)
     84             return a == 1;
     85         count++;
     86     } while (a = 1 < 2)
     87 }
     88 
     89 shouldBeTrue("do_while_less_test()");
     90 
     91 function while_less_test()
     92 {
     93     var a = 0;
     94     while (a = 1 < 2)
     95         return a == 1;
     96 }
     97 
     98 shouldBeTrue("while_less_test()");
     99 
    100 function for_less_test()
    101 {
    102     for (var a = 0; a = 1 < 2; )
    103         return a == 1;
    104 }
    105 
    106 shouldBeTrue("for_less_test()");
    107