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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 if we have a tower of large numerical constants being added to each other, the DFG knows that a sufficiently large tower may produce a large enough value that overflow check elimination must be careful."
     26 );
     27 
     28 function foo(a, b) {
     29     return (a + b + 281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
     30             281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
     31             281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
     32             281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
     33             281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
     34             281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
     35             281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 +
     36             281474976710655 + 281474976710655 + 281474976710655 + 281474976710655 + 30) | 0;
     37 }
     38 
     39 function bar(a, b, o) {
     40     eval(""); // Prevent this function from being opt compiled.
     41     return foo(a, b, o);
     42 }
     43 
     44 var warmup = 200;
     45 
     46 for (var i = 0; i < warmup + 1; ++i) {
     47     var a, b, c;
     48     var expected;
     49     if (i < warmup) {
     50         a = 1;
     51         b = 2;
     52         expected = 0;
     53     } else {
     54         a = 2147483645;
     55         b = 2147483644;
     56         expected = -10;
     57     }
     58     shouldBe("bar(" + a + ", " + b + ")", "" + expected);
     59 }
     60