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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 that when values predicted but not proven int are used in a tower of additions, we don't eliminate the overflow check unsoundly."
     26 );
     27 
     28 function foo(a, b, o) {
     29     return (a + b + o.f) | 0;
     30 }
     31 
     32 function bar(a, b, o) {
     33     eval(""); // Prevent this function from being opt compiled.
     34     return foo(a, b, o);
     35 }
     36 
     37 var badCases = [
     38     {a:2147483645, b:2147483644, c:9007199254740990, expected:-8},
     39     {a:2147483643, b:2147483643, c:18014398509481980, expected:-16},
     40     {a:2147483643, b:2147483642, c:36028797018963960, expected:-16},
     41     {a:2147483642, b:2147483642, c:36028797018963960, expected:-16},
     42     {a:2147483641, b:2147483640, c:144115188075855840, expected:-32},
     43     {a:2147483640, b:2147483640, c:144115188075855840, expected:-64},
     44     {a:2147483640, b:2147483639, c:288230376151711680, expected:-64},
     45     {a:2147483639, b:2147483639, c:288230376151711680, expected:-64}
     46 ];
     47 
     48 var warmup = 100;
     49 
     50 for (var i = 0; i < warmup + badCases.length; ++i) {
     51     var a, b, c;
     52     var expected;
     53     if (i < warmup) {
     54         a = 1;
     55         b = 2;
     56         c = 3;
     57         expected = 6;
     58     } else {
     59         var current = badCases[i - warmup];
     60         a = current.a;
     61         b = current.b;
     62         c = current.c;
     63         expected = current.expected;
     64     }
     65     shouldBe("bar(" + a + ", " + b + ", {f:" + c + "})", "" + expected);
     66 }
     67